diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2020-09-24 18:48:45 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-09-24 18:48:45 +0100 |
| commit | 8c1c07929feae876202ba26f07a540c5115c18cd (patch) | |
| tree | 20f6c8e2ac556bfb3c88a98c0d0cb2689de0263e | |
| parent | 1bd5556f6686365e76f7ff67fe67260c449e8345 (diff) | |
| parent | d73415a315471ac0b127ed3fad45c8ec5d711de1 (diff) | |
Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging
Pull request
This includes the atomic_ -> qatomic_ rename that touches many files and is
prone to conflicts.
# gpg: Signature made Wed 23 Sep 2020 17:08:43 BST
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8
* remotes/stefanha/tags/block-pull-request:
qemu/atomic.h: rename atomic_ to qatomic_
tests: add test-fdmon-epoll
fdmon-poll: reset npfd when upgrading to fdmon-epoll
gitmodules: add qemu.org vbootrom submodule
gitmodules: switch to qemu.org meson mirror
gitmodules: switch to qemu.org qboot mirror
docs/system: clarify deprecation schedule
virtio-crypto: don't modify elem->in/out_sg
virtio-blk: undo destructive iov_discard_*() operations
util/iov: add iov_discard_undo()
virtio: add vhost-user-fs-ccw device
libvhost-user: handle endianness as mandated by the spec
MAINTAINERS: add Stefan Hajnoczi as block/nvme.c maintainer
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
147 files changed, 1514 insertions, 1075 deletions
diff --git a/.gitmodules b/.gitmodules index 9ffb9f3f4f..2bdeeacef8 100644 --- a/.gitmodules +++ b/.gitmodules @@ -57,10 +57,10 @@ url = https://git.qemu.org/git/opensbi.git [submodule "roms/qboot"] path = roms/qboot - url = https://github.com/bonzini/qboot + url = https://git.qemu.org/git/qboot.git [submodule "meson"] path = meson - url = https://github.com/mesonbuild/meson/ + url = https://git.qemu.org/git/meson.git [submodule "roms/vbootrom"] path = roms/vbootrom - url = https://github.com/google/vbootrom.git + url = https://git.qemu.org/git/vbootrom.git diff --git a/MAINTAINERS b/MAINTAINERS index 3d17cad19a..5eed1e692b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2132,6 +2132,7 @@ F: migration/block* F: include/block/aio.h F: include/block/aio-wait.h F: scripts/qemugdb/aio.py +F: tests/test-fdmon-epoll.c T: git https://github.com/stefanha/qemu.git block Block SCSI subsystem @@ -2920,10 +2921,12 @@ S: Supported F: block/null.c NVMe Block Driver -M: Fam Zheng <fam@euphon.net> +M: Stefan Hajnoczi <stefanha@redhat.com> +R: Fam Zheng <fam@euphon.net> L: qemu-block@nongnu.org S: Supported F: block/nvme* +T: git https://github.com/stefanha/qemu.git block Bootdevice M: Gonglei <arei.gonglei@huawei.com> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index ad8b315b35..e4bbf78366 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -2379,7 +2379,7 @@ static __thread bool have_sigbus_pending; static void kvm_cpu_kick(CPUState *cpu) { - atomic_set(&cpu->kvm_run->immediate_exit, 1); + qatomic_set(&cpu->kvm_run->immediate_exit, 1); } static void kvm_cpu_kick_self(void) @@ -2400,7 +2400,7 @@ static void kvm_eat_signals(CPUState *cpu) int r; if (kvm_immediate_exit) { - atomic_set(&cpu->kvm_run->immediate_exit, 0); + qatomic_set(&cpu->kvm_run->immediate_exit, 0); /* Write kvm_run->immediate_exit before the cpu->exit_request * write in kvm_cpu_exec. */ @@ -2434,7 +2434,7 @@ int kvm_cpu_exec(CPUState *cpu) DPRINTF("kvm_cpu_exec()\n"); if (kvm_arch_process_async_events(cpu)) { - atomic_set(&cpu->exit_request, 0); + qatomic_set(&cpu->exit_request, 0); return EXCP_HLT; } @@ -2450,7 +2450,7 @@ int kvm_cpu_exec(CPUState *cpu) } kvm_arch_pre_run(cpu, run); - if (atomic_read(&cpu->exit_request)) { + if (qatomic_read(&cpu->exit_request)) { DPRINTF("interrupt exit requested\n"); /* * KVM requires us to reenter the kernel after IO exits to complete @@ -2577,7 +2577,7 @@ int kvm_cpu_exec(CPUState *cpu) vm_stop(RUN_STATE_INTERNAL_ERROR); } - atomic_set(&cpu->exit_request, 0); + qatomic_set(&cpu->exit_request, 0); return ret; } @@ -2994,7 +2994,7 @@ int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) have_sigbus_pending = true; pending_sigbus_addr = addr; pending_sigbus_code = code; - atomic_set(&cpu->exit_request, 1); + qatomic_set(&cpu->exit_request, 1); return 0; #else return 1; diff --git a/accel/tcg/atomic_template.h b/accel/tcg/atomic_template.h index 26969487d6..0ff7f913e1 100644 --- a/accel/tcg/atomic_template.h +++ b/accel/tcg/atomic_template.h @@ -83,7 +83,7 @@ ABI_TYPE ATOMIC_NAME(cmpxchg)(CPUArchState *env, target_ulong addr, #if DATA_SIZE == 16 ret = atomic16_cmpxchg(haddr, cmpv, newv); #else - ret = atomic_cmpxchg__nocheck(haddr, cmpv, newv); + ret = qatomic_cmpxchg__nocheck(haddr, cmpv, newv); #endif ATOMIC_MMU_CLEANUP; atomic_trace_rmw_post(env, addr, info); @@ -131,7 +131,7 @@ ABI_TYPE ATOMIC_NAME(xchg)(CPUArchState *env, target_ulong addr, ATOMIC_MMU_IDX); atomic_trace_rmw_pre(env, addr, info); - ret = atomic_xchg__nocheck(haddr, val); + ret = qatomic_xchg__nocheck(haddr, val); ATOMIC_MMU_CLEANUP; atomic_trace_rmw_post(env, addr, info); return ret; @@ -147,7 +147,7 @@ ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr, \ uint16_t info = trace_mem_build_info(SHIFT, false, 0, false, \ ATOMIC_MMU_IDX); \ atomic_trace_rmw_pre(env, addr, info); \ - ret = atomic_##X(haddr, val); \ + ret = qatomic_##X(haddr, val); \ ATOMIC_MMU_CLEANUP; \ atomic_trace_rmw_post(env, addr, info); \ return ret; \ @@ -182,10 +182,10 @@ ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr, \ ATOMIC_MMU_IDX); \ atomic_trace_rmw_pre(env, addr, info); \ smp_mb(); \ - cmp = atomic_read__nocheck(haddr); \ + cmp = qatomic_read__nocheck(haddr); \ do { \ old = cmp; new = FN(old, val); \ - cmp = atomic_cmpxchg__nocheck(haddr, old, new); \ + cmp = qatomic_cmpxchg__nocheck(haddr, old, new); \ } while (cmp != old); \ ATOMIC_MMU_CLEANUP; \ atomic_trace_rmw_post(env, addr, info); \ @@ -230,7 +230,7 @@ ABI_TYPE ATOMIC_NAME(cmpxchg)(CPUArchState *env, target_ulong addr, #if DATA_SIZE == 16 ret = atomic16_cmpxchg(haddr, BSWAP(cmpv), BSWAP(newv)); #else - ret = atomic_cmpxchg__nocheck(haddr, BSWAP(cmpv), BSWAP(newv)); + ret = qatomic_cmpxchg__nocheck(haddr, BSWAP(cmpv), BSWAP(newv)); #endif ATOMIC_MMU_CLEANUP; atomic_trace_rmw_post(env, addr, info); @@ -280,7 +280,7 @@ ABI_TYPE ATOMIC_NAME(xchg)(CPUArchState *env, target_ulong addr, ATOMIC_MMU_IDX); atomic_trace_rmw_pre(env, addr, info); - ret = atomic_xchg__nocheck(haddr, BSWAP(val)); + ret = qatomic_xchg__nocheck(haddr, BSWAP(val)); ATOMIC_MMU_CLEANUP; atomic_trace_rmw_post(env, addr, info); return BSWAP(ret); @@ -296,7 +296,7 @@ ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr, \ uint16_t info = trace_mem_build_info(SHIFT, false, MO_BSWAP, \ false, ATOMIC_MMU_IDX); \ atomic_trace_rmw_pre(env, addr, info); \ - ret = atomic_##X(haddr, BSWAP(val)); \ + ret = qatomic_##X(haddr, BSWAP(val)); \ ATOMIC_MMU_CLEANUP; \ atomic_trace_rmw_post(env, addr, info); \ return BSWAP(ret); \ @@ -329,10 +329,10 @@ ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr, \ false, ATOMIC_MMU_IDX); \ atomic_trace_rmw_pre(env, addr, info); \ smp_mb(); \ - ldn = atomic_read__nocheck(haddr); \ + ldn = qatomic_read__nocheck(haddr); \ do { \ ldo = ldn; old = BSWAP(ldo); new = FN(old, val); \ - ldn = atomic_cmpxchg__nocheck(haddr, ldo, BSWAP(new)); \ + ldn = qatomic_cmpxchg__nocheck(haddr, ldo, BSWAP(new)); \ } while (ldo != ldn); \ ATOMIC_MMU_CLEANUP; \ atomic_trace_rmw_post(env, addr, info); \ diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 66d38f9d85..e10b46283c 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -367,7 +367,8 @@ static inline void tb_add_jump(TranslationBlock *tb, int n, goto out_unlock_next; } /* Atomically claim the jump destination slot only if it was NULL */ - old = atomic_cmpxchg(&tb->jmp_dest[n], (uintptr_t)NULL, (uintptr_t)tb_next); + old = qatomic_cmpxchg(&tb->jmp_dest[n], (uintptr_t)NULL, + (uintptr_t)tb_next); if (old) { goto out_unlock_next; } @@ -407,7 +408,7 @@ static inline TranslationBlock *tb_find(CPUState *cpu, tb = tb_gen_code(cpu, pc, cs_base, flags, cf_mask); mmap_unlock(); /* We add the TB in the virtual pc hash table for the fast lookup */ - atomic_set(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(pc)], tb); + qatomic_set(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(pc)], tb); } #ifndef CONFIG_USER_ONLY /* We don't take care of direct jumps when address mapping changes in @@ -536,9 +537,9 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, * Ensure zeroing happens before reading cpu->exit_request or * cpu->interrupt_request (see also smp_wmb in cpu_exit()) */ - atomic_mb_set(&cpu_neg(cpu)->icount_decr.u16.high, 0); + qatomic_mb_set(&cpu_neg(cpu)->icount_decr.u16.high, 0); - if (unlikely(atomic_read(&cpu->interrupt_request))) { + if (unlikely(qatomic_read(&cpu->interrupt_request))) { int interrupt_request; qemu_mutex_lock_iothread(); interrupt_request = cpu->interrupt_request; @@ -613,10 +614,10 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, } /* Finally, check if we need to exit to the main loop. */ - if (unlikely(atomic_read(&cpu->exit_request)) + if (unlikely(qatomic_read(&cpu->exit_request)) || (use_icount && cpu_neg(cpu)->icount_decr.u16.low + cpu->icount_extra == 0)) { - atomic_set(&cpu->exit_request, 0); + qatomic_set(&cpu->exit_request, 0); if (cpu->exception_index == -1) { cpu->exception_index = EXCP_INTERRUPT; } @@ -642,7 +643,7 @@ static inline void cpu_loop_exec_tb(CPUState *cpu, TranslationBlock *tb, } *last_tb = NULL; - insns_left = atomic_read(&cpu_neg(cpu)->icount_decr.u32); + insns_left = qatomic_read(&cpu_neg(cpu)->icount_decr.u32); if (insns_left < 0) { /* Something asked us to stop executing chained TBs; just * continue round the main loop. Whatever requested the exit diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 6489abbf8c..aaf8e46ae5 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -312,9 +312,9 @@ void tlb_flush_counts(size_t *pfull, size_t *ppart, size_t *pelide) CPU_FOREACH(cpu) { CPUArchState *env = cpu->env_ptr; - full += atomic_read(&env_tlb(env)->c.full_flush_count); - part += atomic_read(&env_tlb(env)->c.part_flush_count); - elide += atomic_read(&env_tlb(env)->c.elide_flush_count); + full += qatomic_read(&env_tlb(env)->c.full_flush_count); + part += qatomic_read(&env_tlb(env)->c.part_flush_count); + elide += qatomic_read(&env_tlb(env)->c.elide_flush_count); } *pfull = full; *ppart = part; @@ -349,13 +349,13 @@ static void tlb_flush_by_mmuidx_async_work(CPUState *cpu, run_on_cpu_data data) cpu_tb_jmp_cache_clear(cpu); if (to_clean == ALL_MMUIDX_BITS) { - atomic_set(&env_tlb(env)->c.full_flush_count, + qatomic_set(&env_tlb(env)->c.full_flush_count, env_tlb(env)->c.full_flush_count + 1); } else { - atomic_set(&env_tlb(env)->c.part_flush_count, + qatomic_set(&env_tlb(env)->c.part_flush_count, env_tlb(env)->c.part_flush_count + ctpop16(to_clean)); if (to_clean != asked) { - atomic_set(&env_tlb(env)->c.elide_flush_count, + qatomic_set(&env_tlb(env)->c.elide_flush_count, env_tlb(env)->c.elide_flush_count + ctpop16(asked & ~to_clean)); } @@ -693,7 +693,7 @@ void tlb_unprotect_code(ram_addr_t ram_addr) * generated code. * * Other vCPUs might be reading their TLBs during guest execution, so we update - * te->addr_write with atomic_set. We don't need to worry about this for + * te->addr_write with qatomic_set. We don't need to worry about this for * oversized guests as MTTCG is disabled for them. * * Called with tlb_c.lock held. @@ -711,7 +711,7 @@ static void tlb_reset_dirty_range_locked(CPUTLBEntry *tlb_entry, #if TCG_OVERSIZED_GUEST tlb_entry->addr_write |= TLB_NOTDIRTY; #else - atomic_set(&tlb_entry->addr_write, + qatomic_set(&tlb_entry->addr_write, tlb_entry->addr_write | TLB_NOTDIRTY); #endif } @@ -1138,8 +1138,8 @@ static inline target_ulong tlb_read_ofs(CPUTLBEntry *entry, size_t ofs) #if TCG_OVERSIZED_GUEST return *(target_ulong *)((uintptr_t)entry + ofs); #else - /* ofs might correspond to .addr_write, so use atomic_read */ - return atomic_read((target_ulong *)((uintptr_t)entry + ofs)); + /* ofs might correspond to .addr_write, so use qatomic_read */ + return qatomic_read((target_ulong *)((uintptr_t)entry + ofs)); #endif } @@ -1155,11 +1155,11 @@ static bool victim_tlb_hit(CPUArchState *env, size_t mmu_idx, size_t index, CPUTLBEntry *vtlb = &env_tlb(env)->d[mmu_idx].vtable[vidx]; target_ulong cmp; - /* elt_ofs might correspond to .addr_write, so use atomic_read */ + /* elt_ofs might correspond to .addr_write, so use qatomic_read */ #if TCG_OVERSIZED_GUEST cmp = *(target_ulong *)((uintptr_t)vtlb + elt_ofs); #else - cmp = atomic_read((target_ulong *)((uintptr_t)vtlb + elt_ofs)); + cmp = qatomic_read((target_ulong *)((uintptr_t)vtlb + elt_ofs)); #endif if (cmp == page) { diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c index 7098ad96c3..1c664924d7 100644 --- a/accel/tcg/tcg-all.c +++ b/accel/tcg/tcg-all.c @@ -65,7 +65,7 @@ static void tcg_handle_interrupt(CPUState *cpu, int mask) if (!qemu_cpu_is_self(cpu)) { qemu_cpu_kick(cpu); } else { - atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1); + qatomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1); if (use_icount && !cpu->can_do_io && (mask & ~old_mask) != 0) { diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 2d83013633..f44ba9d46d 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -377,9 +377,9 @@ static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb, restore_state_to_opc(env, tb, data); #ifdef CONFIG_PROFILER - atomic_set(&prof->restore_time, + qatomic_set(&prof->restore_time, prof->restore_time + profile_getclock() - ti); - atomic_set(&prof->restore_count, prof->restore_count + 1); + qatomic_set(&prof->restore_count, prof->restore_count + 1); #endif return 0; } @@ -509,7 +509,7 @@ static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) /* Level 2..N-1. */ for (i = v_l2_levels; i > 0; i--) { - void **p = atomic_rcu_read(lp); + void **p = qatomic_rcu_read(lp); if (p == NULL) { void *existing; @@ -518,7 +518,7 @@ static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) return NULL; } p = g_new0(void *, V_L2_SIZE); - existing = atomic_cmpxchg(lp, NULL, p); + existing = qatomic_cmpxchg(lp, NULL, p); if (unlikely(existing)) { g_free(p); p = existing; @@ -528,7 +528,7 @@ static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) lp = p + ((index >> (i * V_L2_BITS)) & (V_L2_SIZE - 1)); } - pd = atomic_rcu_read(lp); + pd = qatomic_rcu_read(lp); if (pd == NULL) { void *existing; @@ -545,7 +545,7 @@ static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) } } #endif - existing = atomic_cmpxchg(lp, NULL, pd); + existing = qatomic_cmpxchg(lp, NULL, pd); if (unlikely(existing)) { #ifndef CONFIG_USER_ONLY { @@ -1253,7 +1253,7 @@ static void do_tb_flush(CPUState *cpu, run_on_cpu_data tb_flush_count) tcg_region_reset_all(); /* XXX: flush processor icache at this point if cache flush is expensive */ - atomic_mb_set(&tb_ctx.tb_flush_count, tb_ctx.tb_flush_count + 1); + qatomic_mb_set(&tb_ctx.tb_flush_count, tb_ctx.tb_flush_count + 1); done: mmap_unlock(); @@ -1265,7 +1265,7 @@ done: void tb_flush(CPUState *cpu) { if (tcg_enabled()) { - unsigned tb_flush_count = atomic_mb_read(&tb_ctx.tb_flush_count); + unsigned tb_flush_count = qatomic_mb_read(&tb_ctx.tb_flush_count); if (cpu_in_exclusive_context(cpu)) { do_tb_flush(cpu, RUN_ON_CPU_HOST_INT(tb_flush_count)); @@ -1358,7 +1358,7 @@ static inline void tb_remove_from_jmp_list(TranslationBlock *orig, int n_orig) int n; /* mark the LSB of jmp_dest[] so that no further jumps can be inserted */ - ptr = atomic_or_fetch(&orig->jmp_dest[n_orig], 1); + ptr = qatomic_or_fetch(&orig->jmp_dest[n_orig], 1); dest = (TranslationBlock *)(ptr & ~1); if (dest == NULL) { return; @@ -1369,7 +1369,7 @@ static inline void tb_remove_from_jmp_list(TranslationBlock *orig, int n_orig) * While acquiring the lock, the jump might have been removed if the * destination TB was invalidated; check again. */ - ptr_locked = atomic_read(&orig->jmp_dest[n_orig]); + ptr_locked = qatomic_read(&orig->jmp_dest[n_orig]); if (ptr_locked != ptr) { qemu_spin_unlock(&dest->jmp_lock); /* @@ -1415,7 +1415,7 @@ static inline void tb_jmp_unlink(TranslationBlock *dest) TB_FOR_EACH_JMP(dest, tb, n) { tb_reset_jump(tb, n); - atomic_and(&tb->jmp_dest[n], (uintptr_t)NULL | 1); + qatomic_and(&tb->jmp_dest[n], (uintptr_t)NULL | 1); /* No need to clear the list entry; setting the dest ptr is enough */ } dest->jmp_list_head = (uintptr_t)NULL; @@ -1439,7 +1439,7 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list) /* make sure no further incoming jumps will be chained to this TB */ qemu_spin_lock(&tb->jmp_lock); - atomic_set(&tb->cflags, tb->cflags | CF_INVALID); + qatomic_set(&tb->cflags, tb->cflags | CF_INVALID); qemu_spin_unlock(&tb->jmp_lock); /* remove the TB from the hash list */ @@ -1466,8 +1466,8 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list) /* remove the TB from the hash list */ h = tb_jmp_cache_hash_func(tb->pc); CPU_FOREACH(cpu) { - if (atomic_read(&cpu->tb_jmp_cache[h]) == tb) { - atomic_set(&cpu->tb_jmp_cache[h], NULL); + if (qatomic_read(&cpu->tb_jmp_cache[h]) == tb) { + qatomic_set(&cpu->tb_jmp_cache[h], NULL); } } @@ -1478,7 +1478,7 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list) /* suppress any remaining jumps to this TB */ tb_jmp_unlink(tb); - atomic_set(&tcg_ctx->tb_phys_invalidate_count, + qatomic_set(&tcg_ctx->tb_phys_invalidate_count, tcg_ctx->tb_phys_invalidate_count + 1); } @@ -1733,7 +1733,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, #ifdef CONFIG_PROFILER /* includes aborted translations because of exceptions */ - atomic_set(&prof->tb_count1, prof->tb_count1 + 1); + qatomic_set(&prof->tb_count1, prof->tb_count1 + 1); ti = profile_getclock(); #endif @@ -1758,8 +1758,9 @@ TranslationBlock *tb_gen_code(CPUState *cpu, } #ifdef CONFIG_PROFILER - atomic_set(&prof->tb_count, prof->tb_count + 1); - atomic_set(&prof->interm_time, prof->interm_time + profile_getclock() - ti); + qatomic_set(&prof->tb_count, prof->tb_count + 1); + qatomic_set(&prof->interm_time, + prof->interm_time + profile_getclock() - ti); ti = profile_getclock(); #endif @@ -1804,10 +1805,10 @@ TranslationBlock *tb_gen_code(CPUState *cpu, tb->tc.size = gen_code_size; #ifdef CONFIG_PROFILER - atomic_set(&prof->code_time, prof->code_time + profile_getclock() - ti); - atomic_set(&prof->code_in_len, prof->code_in_len + tb->size); - atomic_set(&prof->code_out_len, prof->code_out_len + gen_code_size); - atomic_set(&prof->search_out_len, prof->search_out_len + search_size); + qatomic_set(&prof->code_time, prof->code_time + profile_getclock() - ti); + qatomic_set(&prof->code_in_len, prof->code_in_len + tb->size); + qatomic_set(&prof->code_out_len, prof->code_out_len + gen_code_size); + qatomic_set(&prof->search_out_len, prof->search_out_len + search_size); #endif #ifdef DEBUG_DISAS @@ -1869,7 +1870,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, } #endif - atomic_set(&tcg_ctx->code_gen_ptr, (void *) + qatomic_set(&tcg_ctx->code_gen_ptr, (void *) ROUND_UP((uintptr_t)gen_code_buf + gen_code_size + search_size, CODE_GEN_ALIGN)); @@ -1905,7 +1906,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, uintptr_t orig_aligned = (uintptr_t)gen_code_buf; orig_aligned -= ROUND_UP(sizeof(*tb), qemu_icache_linesize); - atomic_set(&tcg_ctx->code_gen_ptr, (void *)orig_aligned); + qatomic_set(&tcg_ctx->code_gen_ptr, (void *)orig_aligned); tb_destroy(tb); return existing_tb; } @@ -2273,7 +2274,7 @@ static void tb_jmp_cache_clear_page(CPUState *cpu, target_ulong page_addr) unsigned int i, i0 = tb_jmp_cache_hash_page(page_addr); for (i = 0; i < TB_JMP_PAGE_SIZE; i++) { - atomic_set(&cpu->tb_jmp_cache[i0 + i], NULL); + qatomic_set(&cpu->tb_jmp_cache[i0 + i], NULL); } } @@ -2393,7 +2394,7 @@ void dump_exec_info(void) qemu_printf("\nStatistics:\n"); qemu_printf("TB flush count %u\n", - atomic_read(&tb_ctx.tb_flush_count)); + qatomic_read(&tb_ctx.tb_flush_count)); qemu_printf("TB invalidate count %zu\n", tcg_tb_phys_invalidate_count()); @@ -2415,7 +2416,7 @@ void cpu_interrupt(CPUState *cpu, int mask) { g_assert(qemu_mutex_iothread_locked()); cpu->interrupt_request |= mask; - atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1); + qatomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1); } /* diff --git a/audio/jackaudio.c b/audio/jackaudio.c index 72ed7c4929..1e714b30bc 100644 --- a/audio/jackaudio.c +++ b/audio/jackaudio.c @@ -104,7 +104,7 @@ static void qjack_buffer_create(QJackBuffer *buffer, int channels, int frames) static void qjack_buffer_clear(QJackBuffer *buffer) { assert(buffer->data); - atomic_store_release(&buffer->used, 0); + qatomic_store_release(&buffer->used, 0); buffer->rptr = 0; buffer->wptr = 0; } @@ -129,7 +129,7 @@ static int qjack_buffer_write(QJackBuffer *buffer, float *data, int size) assert(buffer->data); const int samples = size / sizeof(float); int frames = samples / buffer->channels; - const int avail = buffer->frames - atomic_load_acquire(&buffer->used); + const int avail = buffer->frames - qatomic_load_acquire(&buffer->used); if (frames > avail) { frames = avail; @@ -153,7 +153,7 @@ static int qjack_buffer_write(QJackBuffer *buffer, float *data, int size) buffer->wptr = wptr; - atomic_add(&buffer->used, frames); + qatomic_add(&buffer->used, frames); return frames * buffer->channels * sizeof(float); }; @@ -161,7 +161,7 @@ static int qjack_buffer_write(QJackBuffer *buffer, float *data, int size) static int qjack_buffer_write_l(QJackBuffer *buffer, float **dest, int frames) { assert(buffer->data); - const int avail = buffer->frames - atomic_load_acquire(&buffer->used); + const int avail = buffer->frames - qatomic_load_acquire(&buffer->used); int wptr = buffer->wptr; if (frames > avail) { @@ -185,7 +185,7 @@ static int qjack_buffer_write_l(QJackBuffer *buffer, float **dest, int frames) } buffer->wptr = wptr; - atomic_add(&buffer->used, frames); + qatomic_add(&buffer->used, frames); return frames; } @@ -195,7 +195,7 @@ static int qjack_buffer_read(QJackBuffer *buffer, float *dest, int size) assert(buffer->data); const int samples = size / sizeof(float); int frames = samples / buffer->channels; - const int avail = atomic_load_acquire(&buffer->used); + const int avail = qatomic_load_acquire(&buffer->used); if (frames > avail) { frames = avail; @@ -219,7 +219,7 @@ static int qjack_buffer_read(QJackBuffer *buffer, float *dest, int size) buffer->rptr = rptr; - atomic_sub(&buffer->used, frames); + qatomic_sub(&buffer->used, frames); return frames * buffer->channels * sizeof(float); } @@ -228,7 +228,7 @@ static int qjack_buffer_read_l(QJackBuffer *buffer, float **dest, int frames) { assert(buffer->data); int copy = frames; - const int used = atomic_load_acquire(&buffer->used); + const int used = qatomic_load_acquire(&buffer->used); int rptr = buffer->rptr; if (copy > used) { @@ -252,7 +252,7 @@ static int qjack_buffer_read_l(QJackBuffer *buffer, float **dest, int frames) } buffer->rptr = rptr; - atomic_sub(&buffer->used, copy); + qatomic_sub(&buffer->used, copy); return copy; } @@ -1694,7 +1694,7 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file, } /* bdrv_new() and bdrv_close() make it so */ - assert(atomic_read(&bs->copy_on_read) == 0); + assert(qatomic_read(&bs->copy_on_read) == 0); if (bs->open_flags & BDRV_O_COPY_ON_READ) { if (!bs->read_only) { @@ -4436,7 +4436,7 @@ static void bdrv_close(BlockDriverState *bs) bs->file = NULL; g_free(bs->opaque); bs->opaque = NULL; - atomic_set(&bs->copy_on_read, 0); + qatomic_set(&bs->copy_on_read, 0); bs->backing_file[0] = '\0'; bs->backing_format[0] = '\0'; bs->total_sectors = 0; diff --git a/block/block-backend.c b/block/block-backend.c index 24dd0670d1..ce78d30794 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1353,12 +1353,12 @@ int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags) void blk_inc_in_flight(BlockBackend *blk) { - atomic_inc(&blk->in_flight); + qatomic_inc(&blk->in_flight); } void blk_dec_in_flight(BlockBackend *blk) { - atomic_dec(&blk->in_flight); + qatomic_dec(&blk->in_flight); aio_wait_kick(); } @@ -1720,7 +1720,7 @@ void blk_drain(BlockBackend *blk) /* We may have -ENOMEDIUM completions in flight */ AIO_WAIT_WHILE(blk_get_aio_context(blk), - atomic_mb_read(&blk->in_flight) > 0); + qatomic_mb_read(&blk->in_flight) > 0); if (bs) { bdrv_drained_end(bs); @@ -1739,7 +1739,7 @@ void blk_drain_all(void) aio_context_acquire(ctx); /* We may have -ENOMEDIUM completions in flight */ - AIO_WAIT_WHILE(ctx, atomic_mb_read(&blk->in_flight) > 0); + AIO_WAIT_WHILE(ctx, qatomic_mb_read(&blk->in_flight) > 0); aio_context_release(ctx); } @@ -2346,6 +2346,7 @@ void blk_io_limits_update_group(BlockBackend *blk, const char *group) static void blk_root_drained_begin(BdrvChild *child) { BlockBackend *blk = child->opaque; + ThrottleGroupMember *tgm = &blk->public.throttle_group_member; if (++blk->quiesce_counter == 1) { if (blk->dev_ops && blk->dev_ops->drained_begin) { @@ -2356,8 +2357,8 @@ static void blk_root_drained_begin(BdrvChild *child) /* Note that blk->root may not be accessible here yet if we are just * attaching to a BlockDriverState that is drained. Use child instead. */ - if (atomic_fetch_inc(&blk->public.throttle_group_member.io_limits_disabled) == 0) { - throttle_group_restart_tgm(&blk->public.throttle_group_member); + if (qatomic_fetch_inc(&tgm->io_limits_disabled) == 0) { + throttle_group_restart_tgm(tgm); } } @@ -2374,7 +2375,7 @@ static void blk_root_drained_end(BdrvChild *child, int *drained_end_counter) assert(blk->quiesce_counter); assert(blk->public.throttle_group_member.io_limits_disabled); - atomic_dec(&blk->public.throttle_group_member.io_limits_disabled); + qatomic_dec(&blk->public.throttle_group_member.io_limits_disabled); if (--blk->quiesce_counter == 0) { if (blk->dev_ops && blk->dev_ops->drained_end) { diff --git a/block/io.c b/block/io.c index a2389bb38c..11df1889f1 100644 --- a/block/io.c +++ b/block/io.c @@ -69,7 +69,7 @@ void bdrv_parent_drained_end_single(BdrvChild *c) { int drained_end_counter = 0; bdrv_parent_drained_end_single_no_poll(c, &drained_end_counter); - BDRV_POLL_WHILE(c->bs, atomic_read(&drained_end_counter) > 0); + BDRV_POLL_WHILE(c->bs, qatomic_read(&drained_end_counter) > 0); } static void bdrv_parent_drained_end(BlockDriverState *bs, BdrvChild *ignore, @@ -186,12 +186,12 @@ void bdrv_refresh_limits(BlockDriverState *bs, Error **errp) */ void bdrv_enable_copy_on_read(BlockDriverState *bs) { - atomic_inc(&bs->copy_on_read); + qatomic_inc(&bs->copy_on_read); } void bdrv_disable_copy_on_read(BlockDriverState *bs) { - int old = atomic_fetch_dec(&bs->copy_on_read); + int old = qatomic_fetch_dec(&bs->copy_on_read); assert(old >= 1); } @@ -219,9 +219,9 @@ static void coroutine_fn bdrv_drain_invoke_entry(void *opaque) } /* Set data->done and decrement drained_end_counter before bdrv_wakeup() */ - atomic_mb_set(&data->done, true); + qatomic_mb_set(&data->done, true); if (!data->begin) { - atomic_dec(data->drained_end_counter); + qatomic_dec(data->drained_end_counter); } bdrv_dec_in_flight(bs); @@ -248,7 +248,7 @@ static void bdrv_drain_invoke(BlockDriverState *bs, bool begin, }; if (!begin) { - atomic_inc(drained_end_counter); + qatomic_inc(drained_end_counter); } /* Make sure the driver callback completes during the polling phase for @@ -268,7 +268,7 @@ bool bdrv_drain_poll(BlockDriverState *bs, bool recursive, return true; } - if (atomic_read(&bs->in_flight)) { + if (qatomic_read(&bs->in_flight)) { return true; } @@ -382,7 +382,7 @@ void bdrv_do_drained_begin_quiesce(BlockDriverState *bs, assert(!qemu_in_coroutine()); /* Stop things in parent-to-child order */ - if (atomic_fetch_inc(&bs->quiesce_counter) == 0) { + if (qatomic_fetch_inc(&bs->quiesce_counter) == 0) { aio_disable_external(bdrv_get_aio_context(bs)); } @@ -473,7 +473,7 @@ static void bdrv_do_drained_end(BlockDriverState *bs, bool recursive, bdrv_parent_drained_end(bs, parent, ignore_bds_parents, drained_end_counter); - old_quiesce_counter = atomic_fetch_dec(&bs->quiesce_counter); + old_quiesce_counter = qatomic_fetch_dec(&bs->quiesce_counter); if (old_quiesce_counter == 1) { aio_enable_external(bdrv_get_aio_context(bs)); } @@ -492,7 +492,7 @@ void bdrv_drained_end(BlockDriverState *bs) { int drained_end_counter = 0; bdrv_do_drained_end(bs, false, NULL, false, &drained_end_counter); - BDRV_POLL_WHILE(bs, atomic_read(&drained_end_counter) > 0); + BDRV_POLL_WHILE(bs, qatomic_read(&drained_end_counter) > 0); } void bdrv_drained_end_no_poll(BlockDriverState *bs, int *drained_end_counter) @@ -504,7 +504,7 @@ void bdrv_subtree_drained_end(BlockDriverState *bs) { int drained_end_counter = 0; bdrv_do_drained_end(bs, true, NULL, false, &drained_end_counter); - BDRV_POLL_WHILE(bs, atomic_read(&drained_end_counter) > 0); + BDRV_POLL_WHILE(bs, qatomic_read(&drained_end_counter) > 0); } void bdrv_apply_subtree_drain(BdrvChild *child, BlockDriverState *new_parent) @@ -526,7 +526,7 @@ void bdrv_unapply_subtree_drain(BdrvChild *child, BlockDriverState *old_parent) &drained_end_counter); } - BDRV_POLL_WHILE(child->bs, atomic_read(&drained_end_counter) > 0); + BDRV_POLL_WHILE(child->bs, qatomic_read(&drained_end_counter) > 0); } /* @@ -553,7 +553,7 @@ static void bdrv_drain_assert_idle(BlockDriverState *bs) { BdrvChild *child, *next; - assert(atomic_read(&bs->in_flight) == 0); + assert(qatomic_read(&bs->in_flight) == 0); QLIST_FOREACH_SAFE(child, &bs->children, next, next) { bdrv_drain_assert_idle(child->bs); } @@ -655,7 +655,7 @@ void bdrv_drain_all_end(void) } assert(qemu_get_current_aio_context() == qemu_get_aio_context()); - AIO_WAIT_WHILE(NULL, atomic_read(&drained_end_counter) > 0); + AIO_WAIT_WHILE(NULL, qatomic_read(&drained_end_counter) > 0); assert(bdrv_drain_all_count > 0); bdrv_drain_all_count--; @@ -675,7 +675,7 @@ void bdrv_drain_all(void) static void tracked_request_end(BdrvTrackedRequest *req) { if (req->serialising) { - atomic_dec(&req->bs->serialising_in_flight); + qatomic_dec(&req->bs->serialising_in_flight); } qemu_co_mutex_lock(&req->bs->reqs_lock); @@ -777,7 +777,7 @@ bool bdrv_mark_request_serialising(BdrvTrackedRequest *req, uint64_t align) qemu_co_mutex_lock(&bs->reqs_lock); if (!req->serialising) { - atomic_inc(&req->bs->serialising_in_flight); + qatomic_inc(&req->bs->serialising_in_flight); req->serialising = true; } @@ -841,7 +841,7 @@ static int bdrv_get_cluster_size(BlockDriverState *bs) void bdrv_inc_in_flight(BlockDriverState *bs) { - atomic_inc(&bs->in_flight); + qatomic_inc(&bs->in_flight); } void bdrv_wakeup(BlockDriverState *bs) @@ -851,7 +851,7 @@ void bdrv_wakeup(BlockDriverState *bs) void bdrv_dec_in_flight(BlockDriverState *bs) { - atomic_dec(&bs->in_flight); + qatomic_dec(&bs->in_flight); bdrv_wakeup(bs); } @@ -860,7 +860,7 @@ static bool coroutine_fn bdrv_wait_serialising_requests(BdrvTrackedRequest *self BlockDriverState *bs = self->bs; bool waited = false; - if (!atomic_read(&bs->serialising_in_flight)) { + if (!qatomic_read(&bs->serialising_in_flight)) { return false; } @@ -1747,7 +1747,7 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child, bdrv_inc_in_flight(bs); /* Don't do copy-on-read if we read data before write operation */ - if (atomic_read(&bs->copy_on_read)) { + if (qatomic_read(&bs->copy_on_read)) { flags |= BDRV_REQ_COPY_ON_READ; } @@ -1935,7 +1935,7 @@ bdrv_co_write_req_finish(BdrvChild *child, int64_t offset, uint64_t bytes, int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE); BlockDriverState *bs = child->bs; - atomic_inc(&bs->write_gen); + qatomic_inc(&bs->write_gen); /* * Discard cannot extend the image, but in error handling cases, such as @@ -2768,7 +2768,7 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs) } qemu_co_mutex_lock(&bs->reqs_lock); - current_gen = atomic_read(&bs->write_gen); + current_gen = qatomic_read(&bs->write_gen); /* Wait until any previous flushes are completed */ while (bs->active_flush_req) { @@ -3116,7 +3116,7 @@ void bdrv_io_plug(BlockDriverState *bs) bdrv_io_plug(child->bs); } - if (atomic_fetch_inc(&bs->io_plugged) == 0) { + if (qatomic_fetch_inc(&bs->io_plugged) == 0) { BlockDriver *drv = bs->drv; if (drv && drv->bdrv_io_plug) { drv->bdrv_io_plug(bs); @@ -3129,7 +3129,7 @@ void bdrv_io_unplug(BlockDriverState *bs) BdrvChild *child; assert(bs->io_plugged); - if (atomic_fetch_dec(&bs->io_plugged) == 1) { + if (qatomic_fetch_dec(&bs->io_plugged) == 1) { BlockDriver *drv = bs->drv; if (drv && drv->bdrv_io_unplug) { drv->bdrv_io_unplug(bs); diff --git a/block/nfs.c b/block/nfs.c index 61a249a9fc..f86e660374 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -721,7 +721,7 @@ nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data, } /* Set task->complete before reading bs->wakeup. */ - atomic_mb_set(&task->complete, 1); + qatomic_mb_set(&task->complete, 1); bdrv_wakeup(task->bs); } diff --git a/block/sheepdog.c b/block/sheepdog.c index cbbebc1aaf..2f5c0eb376 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -665,7 +665,7 @@ out: srco->co = NULL; srco->ret = ret; /* Set srco->finished before reading bs->wakeup. */ - atomic_mb_set(&srco->finished, true); + qatomic_mb_set(&srco->finished, true); if (srco->bs) { bdrv_wakeup(srco->bs); } diff --git a/block/throttle-groups.c b/block/throttle-groups.c index 4e28365d8d..e2f2813c0f 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -228,7 +228,7 @@ static ThrottleGroupMember *next_throttle_token(ThrottleGroupMember *tgm, * immediately if it has pending requests. Otherwise we could be * forcing it to wait for other member's throttled requests. */ if (tgm_has_pending_reqs(tgm, is_write) && - atomic_read(&tgm->io_limits_disabled)) { + qatomic_read(&tgm->io_limits_disabled)) { return tgm; } @@ -272,7 +272,7 @@ static bool throttle_group_schedule_timer(ThrottleGroupMember *tgm, ThrottleTimers *tt = &tgm->throttle_timers; bool must_wait; - if (atomic_read(&tgm->io_limits_disabled)) { + if (qatomic_read(&tgm->io_limits_disabled)) { return false; } @@ -417,7 +417,7 @@ static void coroutine_fn throttle_group_restart_queue_entry(void *opaque) g_free(data); - atomic_dec(&tgm->restart_pending); + qatomic_dec(&tgm->restart_pending); aio_wait_kick(); } @@ -434,7 +434,7 @@ static void throttle_group_restart_queue(ThrottleGroupMember *tgm, bool is_write * be no timer pending on this tgm at this point */ assert(!timer_pending(tgm->throttle_timers.timers[is_write])); - atomic_inc(&tgm->restart_pending); + qatomic_inc(&tgm->restart_pending); co = qemu_coroutine_create(throttle_group_restart_queue_entry, rd); aio_co_enter(tgm->aio_context, co); @@ -544,7 +544,7 @@ void throttle_group_register_tgm(ThrottleGroupMember *tgm, tgm->throttle_state = ts; tgm->aio_context = ctx; - atomic_set(&tgm->restart_pending, 0); + qatomic_set(&tgm->restart_pending, 0); qemu_mutex_lock(&tg->lock); /* If the ThrottleGroup is new set this ThrottleGroupMember as the token */ @@ -592,7 +592,7 @@ void throttle_group_unregister_tgm(ThrottleGroupMember *tgm) } /* Wait for throttle_group_restart_queue_entry() coroutines to finish */ - AIO_WAIT_WHILE(tgm->aio_context, atomic_read(&tgm->restart_pending) > 0); + AIO_WAIT_WHILE(tgm->aio_context, qatomic_read(&tgm->restart_pending) > 0); qemu_mutex_lock(&tg->lock); for (i = 0; i < 2; i++) { diff --git a/block/throttle.c b/block/throttle.c index 9a0f38149a..b685166ad4 100644 --- a/block/throttle.c +++ b/block/throttle.c @@ -217,7 +217,7 @@ static void throttle_reopen_abort(BDRVReopenState *reopen_state) static void coroutine_fn throttle_co_drain_begin(BlockDriverState *bs) { ThrottleGroupMember *tgm = bs->opaque; - if (atomic_fetch_inc(&tgm->io_limits_disabled) == 0) { + if (qatomic_fetch_inc(&tgm->io_limits_disabled) == 0) { throttle_group_restart_tgm(tgm); } } @@ -226,7 +226,7 @@ static void coroutine_fn throttle_co_drain_end(BlockDriverState *bs) { ThrottleGroupMember *tgm = bs->opaque; assert(tgm->io_limits_disabled); - atomic_dec(&tgm->io_limits_disabled); + qatomic_dec(&tgm->io_limits_disabled); } static const char *const throttle_strong_runtime_opts[] = { diff --git a/blockdev.c b/blockdev.c index 7f2561081e..bebd3ba1c3 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1604,7 +1604,7 @@ static void external_snapshot_commit(BlkActionState *common) /* We don't need (or want) to use the transactional * bdrv_reopen_multiple() across all the entries at once, because we * don't want to abort all of them if one of them fails the reopen */ - if (!atomic_read(&state->old_bs->copy_on_read)) { + if (!qatomic_read(&state->old_bs->copy_on_read)) { bdrv_reopen_set_read_only(state->old_bs, true, NULL); } diff --git a/blockjob.c b/blockjob.c index 470facfd47..98ac8af982 100644 --- a/blockjob.c +++ b/blockjob.c @@ -298,7 +298,7 @@ BlockJobInfo *block_job_query(BlockJob *job, Error **errp) info = g_new0(BlockJobInfo, 1); info->type = g_strdup(job_type_str(&job->job)); info->device = g_strdup(job->job.id); - info->busy = atomic_read(&job->job.busy); + info->busy = qatomic_read(&job->job.busy); info->paused = job->job.pause_count > 0; info->offset = job->job.progress.current; info->len = job->job.progress.total; diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c index 9d30ff2283..70055c98b7 100644 --- a/contrib/libvhost-user/libvhost-user.c +++ b/contrib/libvhost-user/libvhost-user.c @@ -42,6 +42,7 @@ #include "qemu/atomic.h" #include "qemu/osdep.h" +#include "qemu/bswap.h" #include "qemu/memfd.h" #include "libvhost-user.h" @@ -448,7 +449,7 @@ static void vu_log_page(uint8_t *log_table, uint64_t page) { DPRINT("Logged dirty guest page: %"PRId64"\n", page); - atomic_or(&log_table[page / 8], 1 << (page % 8)); + qatomic_or(&log_table[page / 8], 1 << (page % 8)); } static void @@ -539,6 +540,14 @@ vu_set_features_exec(VuDev *dev, VhostUserMsg *vmsg) DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); dev->features = vmsg->payload.u64; + if (!vu_has_feature(dev, VIRTIO_F_VERSION_1)) { + /* + * We only support devices conforming to VIRTIO 1.0 or + * later + */ + vu_panic(dev, "virtio legacy devices aren't supported by libvhost-user"); + return false; + } if (!(dev->features & VHOST_USER_F_PROTOCOL_FEATURES)) { vu_set_enable_all_rings(dev, true); @@ -1074,7 +1083,7 @@ vu_set_vring_addr_exec(VuDev *dev, VhostUserMsg *vmsg) return false; } - vq->used_idx = vq->vring.used->idx; + vq->used_idx = lduw_le_p(&vq->vring.used->idx); if (vq->last_avail_idx != vq->used_idx) { bool resume = dev->iface->queue_is_processed_in_order && @@ -1191,7 +1200,7 @@ vu_check_queue_inflights(VuDev *dev, VuVirtq *vq) return 0; } - vq->used_idx = vq->vring.used->idx; + vq->used_idx = lduw_le_p(&vq->vring.used->idx); vq->resubmit_num = 0; vq->resubmit_list = NULL; vq->counter = 0; @@ -2021,13 +2030,13 @@ vu_queue_started(const VuDev *dev, const VuVirtq *vq) static inline uint16_t vring_avail_flags(VuVirtq *vq) { - return vq->vring.avail->flags; + return lduw_le_p(&vq->vring.avail->flags); } static inline uint16_t vring_avail_idx(VuVirtq *vq) { - vq->shadow_avail_idx = vq->vring.avail->idx; + vq->shadow_avail_idx = lduw_le_p(&vq->vring.avail->idx); return vq->shadow_avail_idx; } @@ -2035,7 +2044,7 @@ vring_avail_idx(VuVirtq *vq) static inline uint16_t vring_avail_ring(VuVirtq *vq, int i) { - return vq->vring.avail->ring[i]; + return lduw_le_p(&vq->vring.avail->ring[i]); } static inline uint16_t @@ -2123,12 +2132,12 @@ virtqueue_read_next_desc(VuDev *dev, struct vring_desc *desc, int i, unsigned int max, unsigned int *next) { /* If this descriptor says it doesn't chain, we're done. */ - if (!(desc[i].flags & VRING_DESC_F_NEXT)) { + if (!(lduw_le_p(&desc[i].flags) & VRING_DESC_F_NEXT)) { return VIRTQUEUE_READ_DESC_DONE; } /* Check they're not leading us off end of descriptors. */ - *next = desc[i].next; + *next = lduw_le_p(&desc[i].next); /* Make sure compiler knows to grab that: we don't want it changing! */ smp_wmb(); @@ -2171,8 +2180,8 @@ vu_queue_get_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int *in_bytes, } desc = vq->vring.desc; - if (desc[i].flags & VRING_DESC_F_INDIRECT) { - if (desc[i].len % sizeof(struct vring_desc)) { + if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_INDIRECT) { + if (ldl_le_p(&desc[i].len) % sizeof(struct vring_desc)) { vu_panic(dev, "Invalid size for indirect buffer table"); goto err; } @@ -2185,8 +2194,8 @@ vu_queue_get_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int *in_bytes, /* loop over the indirect descriptor table */ indirect = 1; - desc_addr = desc[i].addr; - desc_len = desc[i].len; + desc_addr = ldq_le_p(&desc[i].addr); + desc_len = ldl_le_p(&desc[i].len); max = desc_len / sizeof(struct vring_desc); read_len = desc_len; desc = vu_gpa_to_va(dev, &read_len, desc_addr); @@ -2213,10 +2222,10 @@ vu_queue_get_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int *in_bytes, goto err; } - if (desc[i].flags & VRING_DESC_F_WRITE) { - in_total += desc[i].len; + if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_WRITE) { + in_total += ldl_le_p(&desc[i].len); } else { - out_total += desc[i].len; + out_total += ldl_le_p(&desc[i].len); } if (in_total >= max_in_bytes && out_total >= max_out_bytes) { goto done; @@ -2367,7 +2376,7 @@ vring_used_flags_set_bit(VuVirtq *vq, int mask) flags = (uint16_t *)((char*)vq->vring.used + offsetof(struct vring_used, flags)); - *flags |= mask; + stw_le_p(flags, lduw_le_p(flags) | mask); } static inline void @@ -2377,7 +2386,7 @@ vring_used_flags_unset_bit(VuVirtq *vq, int mask) flags = (uint16_t *)((char*)vq->vring.used + offsetof(struct vring_used, flags)); - *flags &= ~mask; + stw_le_p(flags, lduw_le_p(flags) & ~mask); } static inline void @@ -2387,7 +2396,7 @@ vring_set_avail_event(VuVirtq *vq, uint16_t val) return; } - *((uint16_t *) &vq->vring.used->ring[vq->vring.num]) = val; + stw_le_p(&vq->vring.used->ring[vq->vring.num], val); } void @@ -2476,14 +2485,14 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz) struct vring_desc desc_buf[VIRTQUEUE_MAX_SIZE]; int rc; - if (desc[i].flags & VRING_DESC_F_INDIRECT) { - if (desc[i].len % sizeof(struct vring_desc)) { + if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_INDIRECT) { + if (ldl_le_p(&desc[i].len) % sizeof(struct vring_desc)) { vu_panic(dev, "Invalid size for indirect buffer table"); } /* loop over the indirect descriptor table */ - desc_addr = desc[i].addr; - desc_len = desc[i].len; + desc_addr = ldq_le_p(&desc[i].addr); + desc_len = ldl_le_p(&desc[i].len); max = desc_len / sizeof(struct vring_desc); read_len = desc_len; desc = vu_gpa_to_va(dev, &read_len, desc_addr); @@ -2505,10 +2514,10 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz) /* Collect all the descriptors */ do { - if (desc[i].flags & VRING_DESC_F_WRITE) { + if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_WRITE) { virtqueue_map_desc(dev, &in_num, iov + out_num, VIRTQUEUE_MAX_SIZE - out_num, true, - desc[i].addr, desc[i].len); + ldq_le_p(&desc[i].addr), ldl_le_p(&desc[i].len)); } else { if (in_num) { vu_panic(dev, "Incorrect order for descriptors"); @@ -2516,7 +2525,7 @@ vu_queue_map_desc(VuDev *dev, VuVirtq *vq, unsigned int idx, size_t sz) } virtqueue_map_desc(dev, &out_num, iov, VIRTQUEUE_MAX_SIZE, false, - desc[i].addr, desc[i].len); + ldq_le_p(&desc[i].addr), ldl_le_p(&desc[i].len)); } /* If we've got too many, that implies a descriptor loop. */ @@ -2712,14 +2721,14 @@ vu_log_queue_fill(VuDev *dev, VuVirtq *vq, max = vq->vring.num; i = elem->index; - if (desc[i].flags & VRING_DESC_F_INDIRECT) { - if (desc[i].len % sizeof(struct vring_desc)) { + if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_INDIRECT) { + if (ldl_le_p(&desc[i].len) % sizeof(struct vring_desc)) { vu_panic(dev, "Invalid size for indirect buffer table"); } /* loop over the indirect descriptor table */ - desc_addr = desc[i].addr; - desc_len = desc[i].len; + desc_addr = ldq_le_p(&desc[i].addr); + desc_len = ldl_le_p(&desc[i].len); max = desc_len / sizeof(struct vring_desc); read_len = desc_len; desc = vu_gpa_to_va(dev, &read_len, desc_addr); @@ -2745,9 +2754,9 @@ vu_log_queue_fill(VuDev *dev, VuVirtq *vq, return; } - if (desc[i].flags & VRING_DESC_F_WRITE) { - min = MIN(desc[i].len, len); - vu_log_write(dev, desc[i].addr, min); + if (lduw_le_p(&desc[i].flags) & VRING_DESC_F_WRITE) { + min = MIN(ldl_le_p(&desc[i].len), len); + vu_log_write(dev, ldq_le_p(&desc[i].addr), min); len -= min; } @@ -2772,15 +2781,15 @@ vu_queue_fill(VuDev *dev, VuVirtq *vq, idx = (idx + vq->used_idx) % vq->vring.num; - uelem.id = elem->index; - uelem.len = len; + stl_le_p(&uelem.id, elem->index); + stl_le_p(&uelem.len, len); vring_used_write(dev, vq, &uelem, idx); } static inline void vring_used_idx_set(VuDev *dev, VuVirtq *vq, uint16_t val) { - vq->vring.used->idx = val; + stw_le_p(&vq->vring.used->idx, val); vu_log_write(dev, vq->vring.log_guest_addr + offsetof(struct vring_used, idx), sizeof(vq->vring.used->idx)); diff --git a/cpus-common.c b/cpus-common.c index 34044f4e4c..83475efff7 100644 --- a/cpus-common.c +++ b/cpus-common.c @@ -148,7 +148,7 @@ void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data, wi.exclusive = false; queue_work_on_cpu(cpu, &wi); - while (!atomic_mb_read(&wi.done)) { + while (!qatomic_mb_read(&wi.done)) { CPUState *self_cpu = current_cpu; qemu_cond_wait(&qemu_work_cond, mutex); @@ -188,20 +188,20 @@ void start_exclusive(void) exclusive_idle(); /* Make all other cpus stop executing. */ - atomic_set(&pending_cpus, 1); + qatomic_set(&pending_cpus, 1); /* Write pending_cpus before reading other_cpu->running. */ smp_mb(); running_cpus = 0; CPU_FOREACH(other_cpu) { - if (atomic_read(&other_cpu->running)) { + if (qatomic_read(&other_cpu->running)) { other_cpu->has_waiter = true; running_cpus++; qemu_cpu_kick(other_cpu); } } - atomic_set(&pending_cpus, running_cpus + 1); + qatomic_set(&pending_cpus, running_cpus + 1); while (pending_cpus > 1) { qemu_cond_wait(&exclusive_cond, &qemu_cpu_list_lock); } @@ -220,7 +220,7 @@ void end_exclusive(void) current_cpu->in_exclusive_context = false; qemu_mutex_lock(&qemu_cpu_list_lock); - atomic_set(&pending_cpus, 0); + qatomic_set(&pending_cpus, 0); qemu_cond_broadcast(&exclusive_resume); qemu_mutex_unlock(&qemu_cpu_list_lock); } @@ -228,7 +228,7 @@ void end_exclusive(void) /* Wait for exclusive ops to finish, and begin cpu execution. */ void cpu_exec_start(CPUState *cpu) { - atomic_set(&cpu->running, true); + qatomic_set(&cpu->running, true); /* Write cpu->running before reading pending_cpus. */ smp_mb(); @@ -246,17 +246,17 @@ void cpu_exec_start(CPUState *cpu) * 3. pending_cpus == 0. Then start_exclusive is definitely going to * see cpu->running == true, and it will kick the CPU. */ - if (unlikely(atomic_read(&pending_cpus))) { + if (unlikely(qatomic_read(&pending_cpus))) { QEMU_LOCK_GUARD(&qemu_cpu_list_lock); if (!cpu->has_waiter) { /* Not counted in pending_cpus, let the exclusive item * run. Since we have the lock, just set cpu->running to true * while holding it; no need to check pending_cpus again. */ - atomic_set(&cpu->running, false); + qatomic_set(&cpu->running, false); exclusive_idle(); /* Now pending_cpus is zero. */ - atomic_set(&cpu->running, true); + qatomic_set(&cpu->running, true); } else { /* Counted in pending_cpus, go ahead and release the * waiter at cpu_exec_end. @@ -268,7 +268,7 @@ void cpu_exec_start(CPUState *cpu) /* Mark cpu as not executing, and release pending exclusive ops. */ void cpu_exec_end(CPUState *cpu) { - atomic_set(&cpu->running, false); + qatomic_set(&cpu->running, false); /* Write cpu->running before reading pending_cpus. */ smp_mb(); @@ -288,11 +288,11 @@ void cpu_exec_end(CPUState *cpu) * see cpu->running == false, and it can ignore this CPU until the * next cpu_exec_start. */ - if (unlikely(atomic_read(&pending_cpus))) { + if (unlikely(qatomic_read(&pending_cpus))) { QEMU_LOCK_GUARD(&qemu_cpu_list_lock); if (cpu->has_waiter) { cpu->has_waiter = false; - atomic_set(&pending_cpus, pending_cpus - 1); + qatomic_set(&pending_cpus, pending_cpus - 1); if (pending_cpus == 1) { qemu_cond_signal(&exclusive_cond); } @@ -346,7 +346,7 @@ void process_queued_cpu_work(CPUState *cpu) if (wi->free) { g_free(wi); } else { - atomic_mb_set(&wi->done, true); + qatomic_mb_set(&wi->done, true); } } qemu_mutex_unlock(&cpu->work_mutex); diff --git a/docs/devel/atomics.rst b/docs/devel/atomics.rst index 445c3b3503..52baa0736d 100644 --- a/docs/devel/atomics.rst +++ b/docs/devel/atomics.rst @@ -23,9 +23,9 @@ provides macros that fall in three camps: - compiler barriers: ``barrier()``; -- weak atomic access and manual memory barriers: ``atomic_read()``, - ``atomic_set()``, ``smp_rmb()``, ``smp_wmb()``, ``smp_mb()``, ``smp_mb_acquire()``, - ``smp_mb_release()``, ``smp_read_barrier_depends()``; +- weak atomic access and manual memory barriers: ``qatomic_read()``, + ``qatomic_set()``, ``smp_rmb()``, ``smp_wmb()``, ``smp_mb()``, + ``smp_mb_acquire()``, ``smp_mb_release()``, ``smp_read_barrier_depends()``; - sequentially consistent atomic access: everything else. @@ -67,23 +67,23 @@ in the order specified by its program". ``qemu/atomic.h`` provides the following set of atomic read-modify-write operations:: - void atomic_inc(ptr) - void atomic_dec(ptr) - void atomic_add(ptr, val) - void atomic_sub(ptr, val) - void atomic_and(ptr, val) - void atomic_or(ptr, val) - - typeof(*ptr) atomic_fetch_inc(ptr) - typeof(*ptr) atomic_fetch_dec(ptr) - typeof(*ptr) atomic_fetch_add(ptr, val) - typeof(*ptr) atomic_fetch_sub(ptr, val) - typeof(*ptr) atomic_fetch_and(ptr, val) - typeof(*ptr) atomic_fetch_or(ptr, val) - typeof(*ptr) atomic_fetch_xor(ptr, val) - typeof(*ptr) atomic_fetch_inc_nonzero(ptr) - typeof(*ptr) atomic_xchg(ptr, val) - typeof(*ptr) atomic_cmpxchg(ptr, old, new) + void qatomic_inc(ptr) + void qatomic_dec(ptr) + void qatomic_add(ptr, val) + void qatomic_sub(ptr, val) + void qatomic_and(ptr, val) + void qatomic_or(ptr, val) + + typeof(*ptr) qatomic_fetch_inc(ptr) + typeof(*ptr) qatomic_fetch_dec(ptr) + typeof(*ptr) qatomic_fetch_add(ptr, val) + typeof(*ptr) qatomic_fetch_sub(ptr, val) + typeof(*ptr) qatomic_fetch_and(ptr, val) + typeof(*ptr) qatomic_fetch_or(ptr, val) + typeof(*ptr) qatomic_fetch_xor(ptr, val) + typeof(*ptr) qatomic_fetch_inc_nonzero(ptr) + typeof(*ptr) qatomic_xchg(ptr, val) + typeof(*ptr) qatomic_cmpxchg(ptr, old, new) all of which return the old value of ``*ptr``. These operations are polymorphic; they operate on any type that is as wide as a pointer or @@ -91,19 +91,19 @@ smaller. Similar operations return the new value of ``*ptr``:: - typeof(*ptr) atomic_inc_fetch(ptr) - typeof(*ptr) atomic_dec_fetch(ptr) - typeof(*ptr) atomic_add_fetch(ptr, val) - typeof(*ptr) atomic_sub_fetch(ptr, val) - typeof(*ptr) atomic_and_fetch(ptr, val) - typeof(*ptr) atomic_or_fetch(ptr, val) - typeof(*ptr) atomic_xor_fetch(ptr, val) + typeof(*ptr) qatomic_inc_fetch(ptr) + typeof(*ptr) qatomic_dec_fetch(ptr) + typeof(*ptr) qatomic_add_fetch(ptr, val) + typeof(*ptr) qatomic_sub_fetch(ptr, val) + typeof(*ptr) qatomic_and_fetch(ptr, val) + typeof(*ptr) qatomic_or_fetch(ptr, val) + typeof(*ptr) qatomic_xor_fetch(ptr, val) ``qemu/atomic.h`` also provides loads and stores that cannot be reordered with each other:: - typeof(*ptr) atomic_mb_read(ptr) - void atomic_mb_set(ptr, val) + typeof(*ptr) qatomic_mb_read(ptr) + void qatomic_mb_set(ptr, val) However these do not provide sequential consistency and, in particular, they do not participate in the total ordering enforced by @@ -115,11 +115,11 @@ easiest to hardest): - lightweight synchronization primitives such as ``QemuEvent`` -- RCU operations (``atomic_rcu_read``, ``atomic_rcu_set``) when publishing +- RCU operations (``qatomic_rcu_read``, ``qatomic_rcu_set``) when publishing or accessing a new version of a data structure -- other atomic accesses: ``atomic_read`` and ``atomic_load_acquire`` for - loads, ``atomic_set`` and ``atomic_store_release`` for stores, ``smp_mb`` +- other atomic accesses: ``qatomic_read`` and ``qatomic_load_acquire`` for + loads, ``qatomic_set`` and ``qatomic_store_release`` for stores, ``smp_mb`` to forbid reordering subsequent loads before a store. @@ -149,22 +149,22 @@ The only guarantees that you can rely upon in this case are: When using this model, variables are accessed with: -- ``atomic_read()`` and ``atomic_set()``; these prevent the compiler from +- ``qatomic_read()`` and ``qatomic_set()``; these prevent the compiler from optimizing accesses out of existence and creating unsolicited accesses, but do not otherwise impose any ordering on loads and stores: both the compiler and the processor are free to reorder them. -- ``atomic_load_acquire()``, which guarantees the LOAD to appear to +- ``qatomic_load_acquire()``, which guarantees the LOAD to appear to happen, with respect to the other components of the system, before all the LOAD or STORE operations specified afterwards. - Operations coming before ``atomic_load_acquire()`` can still be + Operations coming before ``qatomic_load_acquire()`` can still be reordered after it. -- ``atomic_store_release()``, which guarantees the STORE to appear to +- ``qatomic_store_release()``, which guarantees the STORE to appear to happen, with respect to the other components of the system, after all the LOAD or STORE operations specified before. - Operations coming after ``atomic_store_release()`` can still be + Operations coming after ``qatomic_store_release()`` can still be reordered before it. Restrictions to the ordering of accesses can also be specified @@ -229,7 +229,7 @@ They come in six kinds: dependency and a full read barrier or better is required. -Memory barriers and ``atomic_load_acquire``/``atomic_store_release`` are +Memory barriers and ``qatomic_load_acquire``/``qatomic_store_release`` are mostly used when a data structure has one thread that is always a writer and one thread that is always a reader: @@ -238,8 +238,8 @@ and one thread that is always a reader: +==================================+==================================+ | :: | :: | | | | - | atomic_store_release(&a, x); | y = atomic_load_acquire(&b); | - | atomic_store_release(&b, y); | x = atomic_load_acquire(&a); | + | qatomic_store_release(&a, x); | y = qatomic_load_acquire(&b); | + | qatomic_store_release(&b, y); | x = qatomic_load_acquire(&a); | +----------------------------------+----------------------------------+ In this case, correctness is easy to check for using the "pairing" @@ -258,14 +258,14 @@ outside a loop. For example: | | | | n = 0; | n = 0; | | for (i = 0; i < 10; i++) | for (i = 0; i < 10; i++) | - | n += atomic_load_acquire(&a[i]); | n += atomic_read(&a[i]); | + | n += qatomic_load_acquire(&a[i]); | n += qatomic_read(&a[i]); | | | smp_mb_acquire(); | +------------------------------------------+----------------------------------+ | :: | :: | | | | | | smp_mb_release(); | | for (i = 0; i < 10; i++) | for (i = 0; i < 10; i++) | - | atomic_store_release(&a[i], false); | atomic_set(&a[i], false); | + | qatomic_store_release(&a[i], false); | qatomic_set(&a[i], false); | +------------------------------------------+----------------------------------+ Splitting a loop can also be useful to reduce the number of barriers: @@ -277,11 +277,11 @@ Splitting a loop can also be useful to reduce the number of barriers: | | | | n = 0; | smp_mb_release(); | | for (i = 0; i < 10; i++) { | for (i = 0; i < 10; i++) | - | atomic_store_release(&a[i], false); | atomic_set(&a[i], false); | + | qatomic_store_release(&a[i], false); | qatomic_set(&a[i], false); | | smp_mb(); | smb_mb(); | - | n += atomic_read(&b[i]); | n = 0; | + | n += qatomic_read(&b[i]); | n = 0; | | } | for (i = 0; i < 10; i++) | - | | n += atomic_read(&b[i]); | + | | n += qatomic_read(&b[i]); | +------------------------------------------+----------------------------------+ In this case, a ``smp_mb_release()`` is also replaced with a (possibly cheaper, and clearer @@ -294,10 +294,10 @@ as well) ``smp_wmb()``: | | | | | smp_mb_release(); | | for (i = 0; i < 10; i++) { | for (i = 0; i < 10; i++) | - | atomic_store_release(&a[i], false); | atomic_set(&a[i], false); | - | atomic_store_release(&b[i], false); | smb_wmb(); | + | qatomic_store_release(&a[i], false); | qatomic_set(&a[i], false); | + | qatomic_store_release(&b[i], false); | smb_wmb(); | | } | for (i = 0; i < 10; i++) | - | | atomic_set(&b[i], false); | + | | qatomic_set(&b[i], false); | +------------------------------------------+----------------------------------+ @@ -306,7 +306,7 @@ as well) ``smp_wmb()``: Acquire/release pairing and the *synchronizes-with* relation ------------------------------------------------------------ -Atomic operations other than ``atomic_set()`` and ``atomic_read()`` have +Atomic operations other than ``qatomic_set()`` and ``qatomic_read()`` have either *acquire* or *release* semantics [#rmw]_. This has two effects: .. [#rmw] Read-modify-write operations can have both---acquire applies to the @@ -357,16 +357,16 @@ thread 2 is relying on the *synchronizes-with* relation between ``pthread_exit`` Synchronization between threads basically descends from this pairing of a release operation and an acquire operation. Therefore, atomic operations -other than ``atomic_set()`` and ``atomic_read()`` will almost always be +other than ``qatomic_set()`` and ``qatomic_read()`` will almost always be paired with another operation of the opposite kind: an acquire operation will pair with a release operation and vice versa. This rule of thumb is extremely useful; in the case of QEMU, however, note that the other operation may actually be in a driver that runs in the guest! ``smp_read_barrier_depends()``, ``smp_rmb()``, ``smp_mb_acquire()``, -``atomic_load_acquire()`` and ``atomic_rcu_read()`` all count +``qatomic_load_acquire()`` and ``qatomic_rcu_read()`` all count as acquire operations. ``smp_wmb()``, ``smp_mb_release()``, -``atomic_store_release()`` and ``atomic_rcu_set()`` all count as release +``qatomic_store_release()`` and ``qatomic_rcu_set()`` all count as release operations. ``smp_mb()`` counts as both acquire and release, therefore it can pair with any other atomic operation. Here is an example: @@ -375,11 +375,11 @@ it can pair with any other atomic operation. Here is an example: +======================+==============================+ | :: | :: | | | | - | atomic_set(&a, 1); | | + | qatomic_set(&a, 1);| | | smp_wmb(); | | - | atomic_set(&b, 2); | x = atomic_read(&b); | + | qatomic_set(&b, 2);| x = qatomic_read(&b); | | | smp_rmb(); | - | | y = atomic_read(&a); | + | | y = qatomic_read(&a); | +----------------------+------------------------------+ Note that a load-store pair only counts if the two operations access the @@ -393,9 +393,9 @@ correct synchronization: +================================+================================+ | :: | :: | | | | - | atomic_set(&a, 1); | | - | atomic_store_release(&b, 2); | x = atomic_load_acquire(&b); | - | | y = atomic_read(&a); | + | qatomic_set(&a, 1); | | + | qatomic_store_release(&b, 2);| x = qatomic_load_acquire(&b);| + | | y = qatomic_read(&a); | +--------------------------------+--------------------------------+ Acquire and release semantics of higher-level primitives can also be @@ -421,7 +421,7 @@ cannot be a data race: | smp_wmb(); | | | x->i = 2; | | | smp_wmb(); | | - | atomic_set(&a, x); | x = atomic_read(&a); | + | qatomic_set(&a, x);| x = qatomic_read(&a); | | | smp_read_barrier_depends(); | | | y = x->i; | | | smp_read_barrier_depends(); | @@ -442,7 +442,7 @@ and memory barriers, and the equivalents in QEMU: at all. Linux 4.1 updated them to implement volatile semantics via ``ACCESS_ONCE`` (or the more recent ``READ``/``WRITE_ONCE``). - QEMU's ``atomic_read`` and ``atomic_set`` implement C11 atomic relaxed + QEMU's ``qatomic_read`` and ``qatomic_set`` implement C11 atomic relaxed semantics if the compiler supports it, and volatile semantics otherwise. Both semantics prevent the compiler from doing certain transformations; the difference is that atomic accesses are guaranteed to be atomic, @@ -451,8 +451,8 @@ and memory barriers, and the equivalents in QEMU: since we assume the variables passed are machine-word sized and properly aligned. - No barriers are implied by ``atomic_read`` and ``atomic_set`` in either Linux - or QEMU. + No barriers are implied by ``qatomic_read`` and ``qatomic_set`` in either + Linux or QEMU. - atomic read-modify-write operations in Linux are of three kinds: @@ -469,7 +469,7 @@ and memory barriers, and the equivalents in QEMU: a different set of memory barriers; in QEMU, all of them enforce sequential consistency. -- in QEMU, ``atomic_read()`` and ``atomic_set()`` do not participate in +- in QEMU, ``qatomic_read()`` and ``qatomic_set()`` do not participate in the total ordering enforced by sequentially-consistent operations. This is because QEMU uses the C11 memory model. The following example is correct in Linux but not in QEMU: @@ -479,8 +479,8 @@ and memory barriers, and the equivalents in QEMU: +==================================+================================+ | :: | :: | | | | - | a = atomic_fetch_add(&x, 2); | a = atomic_fetch_add(&x, 2); | - | b = READ_ONCE(&y); | b = atomic_read(&y); | + | a = atomic_fetch_add(&x, 2); | a = qatomic_fetch_add(&x, 2);| + | b = READ_ONCE(&y); | b = qatomic_read(&y); | +----------------------------------+--------------------------------+ because the read of ``y`` can be moved (by either the processor or the @@ -495,10 +495,10 @@ and memory barriers, and the equivalents in QEMU: +================================+ | :: | | | - | a = atomic_read(&x); | - | atomic_set(&x, a + 2); | + | a = qatomic_read(&x); | + | qatomic_set(&x, a + 2); | | smp_mb(); | - | b = atomic_read(&y); | + | b = qatomic_read(&y); | +--------------------------------+ Sources diff --git a/docs/devel/lockcnt.txt b/docs/devel/lockcnt.txt index 7c099bc6c8..2d85462fe3 100644 --- a/docs/devel/lockcnt.txt +++ b/docs/devel/lockcnt.txt @@ -95,7 +95,7 @@ not just frees, though there could be cases where this is not necessary. Reads, instead, can be done without taking the mutex, as long as the readers and writers use the same macros that are used for RCU, for -example atomic_rcu_read, atomic_rcu_set, QLIST_FOREACH_RCU, etc. This is +example qatomic_rcu_read, qatomic_rcu_set, QLIST_FOREACH_RCU, etc. This is because the reads are done outside a lock and a set or QLIST_INSERT_HEAD can happen concurrently with the read. The RCU API ensures that the processor and the compiler see all required memory barriers. @@ -189,7 +189,7 @@ qemu_lockcnt_lock and qemu_lockcnt_unlock: if (!xyz) { new_xyz = g_new(XYZ, 1); ... - atomic_rcu_set(&xyz, new_xyz); + qatomic_rcu_set(&xyz, new_xyz); } qemu_lockcnt_unlock(&xyz_lockcnt); @@ -198,7 +198,7 @@ qemu_lockcnt_dec: qemu_lockcnt_inc(&xyz_lockcnt); if (xyz) { - XYZ *p = atomic_rcu_read(&xyz); + XYZ *p = qatomic_rcu_read(&xyz); ... /* Accesses can now be done through "p". */ } @@ -222,7 +222,7 @@ the decrement, the locking and the check on count as follows: qemu_lockcnt_inc(&xyz_lockcnt); if (xyz) { - XYZ *p = atomic_rcu_read(&xyz); + XYZ *p = qatomic_rcu_read(&xyz); ... /* Accesses can now be done through "p". */ } diff --git a/docs/devel/rcu.txt b/docs/devel/rcu.txt index 0ce15ba198..cdf002edd8 100644 --- a/docs/devel/rcu.txt +++ b/docs/devel/rcu.txt @@ -130,13 +130,13 @@ The core RCU API is small: g_free_rcu(&foo, rcu); - typeof(*p) atomic_rcu_read(p); + typeof(*p) qatomic_rcu_read(p); - atomic_rcu_read() is similar to atomic_load_acquire(), but it makes + qatomic_rcu_read() is similar to qatomic_load_acquire(), but it makes some assumptions on the code that calls it. This allows a more optimized implementation. - atomic_rcu_read assumes that whenever a single RCU critical + qatomic_rcu_read assumes that whenever a single RCU critical section reads multiple shared data, these reads are either data-dependent or need no ordering. This is almost always the case when using RCU, because read-side critical sections typically @@ -144,7 +144,7 @@ The core RCU API is small: every update) until reaching a data structure of interest, and then read from there. - RCU read-side critical sections must use atomic_rcu_read() to + RCU read-side critical sections must use qatomic_rcu_read() to read data, unless concurrent writes are prevented by another synchronization mechanism. @@ -152,18 +152,18 @@ The core RCU API is small: data structure in a single direction, opposite to the direction in which the updater initializes it. - void atomic_rcu_set(p, typeof(*p) v); + void qatomic_rcu_set(p, typeof(*p) v); - atomic_rcu_set() is similar to atomic_store_release(), though it also + qatomic_rcu_set() is similar to qatomic_store_release(), though it also makes assumptions on the code that calls it in order to allow a more optimized implementation. - In particular, atomic_rcu_set() suffices for synchronization + In particular, qatomic_rcu_set() suffices for synchronization with readers, if the updater never mutates a field within a data item that is already accessible to readers. This is the case when initializing a new copy of the RCU-protected data structure; just ensure that initialization of *p is carried out - before atomic_rcu_set() makes the data item visible to readers. + before qatomic_rcu_set() makes the data item visible to readers. If this rule is observed, writes will happen in the opposite order as reads in the RCU read-side critical sections (or if there is just one update), and there will be no need for other @@ -212,7 +212,7 @@ DIFFERENCES WITH LINUX programming; not allowing this would prevent upgrading an RCU read-side critical section to become an updater. -- atomic_rcu_read and atomic_rcu_set replace rcu_dereference and +- qatomic_rcu_read and qatomic_rcu_set replace rcu_dereference and rcu_assign_pointer. They take a _pointer_ to the variable being accessed. - call_rcu is a macro that has an extra argument (the name of the first @@ -257,7 +257,7 @@ may be used as a restricted reference-counting mechanism. For example, consider the following code fragment: rcu_read_lock(); - p = atomic_rcu_read(&foo); + p = qatomic_rcu_read(&foo); /* do something with p. */ rcu_read_unlock(); @@ -268,7 +268,7 @@ The write side looks simply like this (with appropriate locking): qemu_mutex_lock(&foo_mutex); old = foo; - atomic_rcu_set(&foo, new); + qatomic_rcu_set(&foo, new); qemu_mutex_unlock(&foo_mutex); synchronize_rcu(); free(old); @@ -277,7 +277,7 @@ If the processing cannot be done purely within the critical section, it is possible to combine this idiom with a "real" reference count: rcu_read_lock(); - p = atomic_rcu_read(&foo); + p = qatomic_rcu_read(&foo); foo_ref(p); rcu_read_unlock(); /* do something with p. */ @@ -287,7 +287,7 @@ The write side can be like this: qemu_mutex_lock(&foo_mutex); old = foo; - atomic_rcu_set(&foo, new); + qatomic_rcu_set(&foo, new); qemu_mutex_unlock(&foo_mutex); synchronize_rcu(); foo_unref(old); @@ -296,7 +296,7 @@ or with call_rcu: qemu_mutex_lock(&foo_mutex); old = foo; - atomic_rcu_set(&foo, new); + qatomic_rcu_set(&foo, new); qemu_mutex_unlock(&foo_mutex); call_rcu(foo_unref, old, rcu); @@ -307,7 +307,7 @@ last reference may be dropped on the read side. Hence you can use call_rcu() instead: foo_unref(struct foo *p) { - if (atomic_fetch_dec(&p->refcount) == 1) { + if (qatomic_fetch_dec(&p->refcount) == 1) { call_rcu(foo_destroy, p, rcu); } } @@ -375,7 +375,7 @@ Instead, we store the size of the array with the array itself: read side: rcu_read_lock(); - struct arr *array = atomic_rcu_read(&global_array); + struct arr *array = qatomic_rcu_read(&global_array); x = i < array->size ? array->data[i] : -1; rcu_read_unlock(); return x; @@ -392,7 +392,7 @@ Instead, we store the size of the array with the array itself: /* Removal phase. */ old_array = global_array; - atomic_rcu_set(&new_array->data, new_array); + qatomic_rcu_set(&new_array->data, new_array); synchronize_rcu(); /* Reclamation phase. */ diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index fb95d2ecc4..8b3ab5bcf1 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -3,10 +3,11 @@ Deprecated features In general features are intended to be supported indefinitely once introduced into QEMU. In the event that a feature needs to be removed, -it will be listed in this section. The feature will remain functional -for 2 releases prior to actual removal. Deprecated features may also -generate warnings on the console when QEMU starts up, or if activated -via a monitor command, however, this is not a mandatory requirement. +it will be listed in this section. The feature will remain functional for the +release in which it was deprecated and one further release. After these two +releases, the feature is liable to be removed. Deprecated features may also +generate warnings on the console when QEMU starts up, or if activated via a +monitor command, however, this is not a mandatory requirement. Prior to the 2.10.0 release there was no official policy on how long features would be deprecated prior to their removal, nor diff --git a/dump/dump.c b/dump/dump.c index 13fda440a4..45da46a952 100644 --- a/dump/dump.c +++ b/dump/dump.c @@ -1572,7 +1572,7 @@ static void dump_state_prepare(DumpState *s) bool dump_in_progress(void) { DumpState *state = &dump_state_global; - return (atomic_read(&state->status) == DUMP_STATUS_ACTIVE); + return (qatomic_read(&state->status) == DUMP_STATUS_ACTIVE); } /* calculate total size of memory to be dumped (taking filter into @@ -1882,7 +1882,7 @@ static void dump_process(DumpState *s, Error **errp) /* make sure status is written after written_size updates */ smp_wmb(); - atomic_set(&s->status, + qatomic_set(&s->status, (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED)); /* send DUMP_COMPLETED message (unconditionally) */ @@ -1908,7 +1908,7 @@ DumpQueryResult *qmp_query_dump(Error **errp) { DumpQueryResult *result = g_new(DumpQueryResult, 1); DumpState *state = &dump_state_global; - result->status = atomic_read(&state->status); + result->status = qatomic_read(&state->status); /* make sure we are reading status and written_size in order */ smp_rmb(); result->completed = state->written_size; @@ -2013,7 +2013,7 @@ void qmp_dump_guest_memory(bool paging, const char *file, begin, length, &local_err); if (local_err) { error_propagate(errp, local_err); - atomic_set(&s->status, DUMP_STATUS_FAILED); + qatomic_set(&s->status, DUMP_STATUS_FAILED); return; } @@ -353,13 +353,13 @@ static MemoryRegionSection *address_space_lookup_region(AddressSpaceDispatch *d, hwaddr addr, bool resolve_subpage) { - MemoryRegionSection *section = atomic_read(&d->mru_section); + MemoryRegionSection *section = qatomic_read(&d->mru_section); subpage_t *subpage; if (!section || section == &d->map.sections[PHYS_SECTION_UNASSIGNED] || !section_covers_addr(section, addr)) { section = phys_page_find(d, addr); - atomic_set(&d->mru_section, section); + qatomic_set(&d->mru_section, section); } if (resolve_subpage && section->mr->subpage) { subpage = container_of(section->mr, subpage_t, iomem); @@ -695,7 +695,8 @@ address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr, IOMMUMemoryRegionClass *imrc; IOMMUTLBEntry iotlb; int iommu_idx; - AddressSpaceDispatch *d = atomic_rcu_read(&cpu->cpu_ases[asidx].memory_dispatch); + AddressSpaceDispatch *d = + qatomic_rcu_read(&cpu->cpu_ases[asidx].memory_dispatch); for (;;) { section = address_space_translate_internal(d, addr, &addr, plen, false); @@ -1247,7 +1248,7 @@ static RAMBlock *qemu_get_ram_block(ram_addr_t addr) { RAMBlock *block; - block = atomic_rcu_read(&ram_list.mru_block); + block = qatomic_rcu_read(&ram_list.mru_block); if (block && addr - block->offset < block->max_length) { return block; } @@ -1273,7 +1274,7 @@ found: * call_rcu(reclaim_ramblock, xxx); * rcu_read_unlock() * - * atomic_rcu_set is not needed here. The block was already published + * qatomic_rcu_set is not needed here. The block was already published * when it was placed into the list. Here we're just making an extra * copy of the pointer. */ @@ -1321,7 +1322,7 @@ bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, page = start_page; WITH_RCU_READ_LOCK_GUARD() { - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); ramblock = qemu_get_ram_block(start); /* Range sanity check on the ramblock */ assert(start >= ramblock->offset && @@ -1371,7 +1372,7 @@ DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty dest = 0; WITH_RCU_READ_LOCK_GUARD() { - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); while (page < end) { unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; @@ -2207,7 +2208,7 @@ static void dirty_memory_extend(ram_addr_t old_ram_size, DirtyMemoryBlocks *new_blocks; int j; - old_blocks = atomic_rcu_read(&ram_list.dirty_memory[i]); + old_blocks = qatomic_rcu_read(&ram_list.dirty_memory[i]); new_blocks = g_malloc(sizeof(*new_blocks) + sizeof(new_blocks->blocks[0]) * new_num_blocks); @@ -2220,7 +2221,7 @@ static void dirty_memory_extend(ram_addr_t old_ram_size, new_blocks->blocks[j] = bitmap_new(DIRTY_MEMORY_BLOCK_SIZE); } - atomic_rcu_set(&ram_list.dirty_memory[i], new_blocks); + qatomic_rcu_set(&ram_list.dirty_memory[i], new_blocks); if (old_blocks) { g_free_rcu(old_blocks, rcu); @@ -2667,7 +2668,7 @@ RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, } RCU_READ_LOCK_GUARD(); - block = atomic_rcu_read(&ram_list.mru_block); + block = qatomic_rcu_read(&ram_list.mru_block); if (block && block->host && host - block->host < block->max_length) { goto found; } @@ -2912,7 +2913,7 @@ MemoryRegionSection *iotlb_to_section(CPUState *cpu, { int asidx = cpu_asidx_from_attrs(cpu, attrs); CPUAddressSpace *cpuas = &cpu->cpu_ases[asidx]; - AddressSpaceDispatch *d = atomic_rcu_read(&cpuas->memory_dispatch); + AddressSpaceDispatch *d = qatomic_rcu_read(&cpuas->memory_dispatch); MemoryRegionSection *sections = d->map.sections; return §ions[index & ~TARGET_PAGE_MASK]; @@ -2996,7 +2997,7 @@ static void tcg_commit(MemoryListener *listener) * may have split the RCU critical section. */ d = address_space_to_dispatch(cpuas->as); - atomic_rcu_set(&cpuas->memory_dispatch, d); + qatomic_rcu_set(&cpuas->memory_dispatch, d); tlb_flush(cpuas->cpu); } @@ -3443,7 +3444,7 @@ void cpu_register_map_client(QEMUBH *bh) qemu_mutex_lock(&map_client_list_lock); client->bh = bh; QLIST_INSERT_HEAD(&map_client_list, client, link); - if (!atomic_read(&bounce.in_use)) { + if (!qatomic_read(&bounce.in_use)) { cpu_notify_map_clients_locked(); } qemu_mutex_unlock(&map_client_list_lock); @@ -3577,7 +3578,7 @@ void *address_space_map(AddressSpace *as, mr = flatview_translate(fv, addr, &xlat, &l, is_write, attrs); if (!memory_access_is_direct(mr, is_write)) { - if (atomic_xchg(&bounce.in_use, true)) { + if (qatomic_xchg(&bounce.in_use, true)) { *plen = 0; return NULL; } @@ -3636,7 +3637,7 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, qemu_vfree(bounce.buffer); bounce.buffer = NULL; memory_region_unref(bounce.mr); - atomic_mb_set(&bounce.in_use, false); + qatomic_mb_set(&bounce.in_use, false); cpu_notify_map_clients(); } @@ -4105,16 +4106,17 @@ int ram_block_discard_disable(bool state) int old; if (!state) { - atomic_dec(&ram_block_discard_disabled); + qatomic_dec(&ram_block_discard_disabled); return 0; } do { - old = atomic_read(&ram_block_discard_disabled); + old = qatomic_read(&ram_block_discard_disabled); if (old < 0) { return -EBUSY; } - } while (atomic_cmpxchg(&ram_block_discard_disabled, old, old + 1) != old); + } while (qatomic_cmpxchg(&ram_block_discard_disabled, + old, old + 1) != old); return 0; } @@ -4123,27 +4125,28 @@ int ram_block_discard_require(bool state) int old; if (!state) { - atomic_inc(&ram_block_discard_disabled); + qatomic_inc(&ram_block_discard_disabled); return 0; } do { - old = atomic_read(&ram_block_discard_disabled); + old = qatomic_read(&ram_block_discard_disabled); if (old > 0) { return -EBUSY; } - } while (atomic_cmpxchg(&ram_block_discard_disabled, old, old - 1) != old); + } while (qatomic_cmpxchg(&ram_block_discard_disabled, + old, old - 1) != old); return 0; } bool ram_block_discard_is_disabled(void) { - return atomic_read(&ram_block_discard_disabled) > 0; + return qatomic_read(&ram_block_discard_disabled) > 0; } bool ram_block_discard_is_required(void) { - return atomic_read(&ram_block_discard_disabled) < 0; + return qatomic_read(&ram_block_discard_disabled) < 0; } #endif diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 2204ba149e..bac2d6fa2b 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -80,6 +80,8 @@ static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status) trace_virtio_blk_req_complete(vdev, req, status); stb_p(&req->in->status, status); + iov_discard_undo(&req->inhdr_undo); + iov_discard_undo(&req->outhdr_undo); virtqueue_push(req->vq, &req->elem, req->in_len); if (s->dataplane_started && !s->dataplane_disabled) { virtio_blk_data_plane_notify(s->dataplane, req->vq); @@ -632,10 +634,12 @@ static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) return -1; } - iov_discard_front(&out_iov, &out_num, sizeof(req->out)); + iov_discard_front_undoable(&out_iov, &out_num, sizeof(req->out), + &req->outhdr_undo); if (in_iov[in_num - 1].iov_len < sizeof(struct virtio_blk_inhdr)) { virtio_error(vdev, "virtio-blk request inhdr too short"); + iov_discard_undo(&req->outhdr_undo); return -1; } @@ -644,7 +648,8 @@ static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) req->in = (void *)in_iov[in_num - 1].iov_base + in_iov[in_num - 1].iov_len - sizeof(struct virtio_blk_inhdr); - iov_discard_back(in_iov, &in_num, sizeof(struct virtio_blk_inhdr)); + iov_discard_back_undoable(in_iov, &in_num, sizeof(struct virtio_blk_inhdr), + &req->inhdr_undo); type = virtio_ldl_p(vdev, &req->out.type); @@ -739,6 +744,8 @@ static int virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb) if (unlikely(iov_to_buf(out_iov, out_num, 0, &dwz_hdr, sizeof(dwz_hdr)) != sizeof(dwz_hdr))) { + iov_discard_undo(&req->inhdr_undo); + iov_discard_undo(&req->outhdr_undo); virtio_error(vdev, "virtio-blk discard/write_zeroes header" " too short"); return -1; diff --git a/hw/core/cpu.c b/hw/core/cpu.c index 8f65383ffb..c55c09f734 100644 --- a/hw/core/cpu.c +++ b/hw/core/cpu.c @@ -111,10 +111,10 @@ void cpu_reset_interrupt(CPUState *cpu, int mask) void cpu_exit(CPUState *cpu) { - atomic_set(&cpu->exit_request, 1); + qatomic_set(&cpu->exit_request, 1); /* Ensure cpu_exec will see the exit request after TCG has exited. */ smp_wmb(); - atomic_set(&cpu->icount_decr_ptr->u16.high, -1); + qatomic_set(&cpu->icount_decr_ptr->u16.high, -1); } int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu, @@ -261,7 +261,7 @@ static void cpu_common_reset(DeviceState *dev) cpu->halted = cpu->start_powered_off; cpu->mem_io_pc = 0; cpu->icount_extra = 0; - atomic_set(&cpu->icount_decr_ptr->u32, 0); + qatomic_set(&cpu->icount_decr_ptr->u32, 0); cpu->can_do_io = 1; cpu->exception_index = -1; cpu->crash_occurred = false; diff --git a/hw/display/qxl.c b/hw/display/qxl.c index 11871340e7..431c107096 100644 --- a/hw/display/qxl.c +++ b/hw/display/qxl.c @@ -1908,7 +1908,7 @@ static void qxl_send_events(PCIQXLDevice *d, uint32_t events) /* * Older versions of Spice forgot to define the QXLRam struct * with the '__aligned__(4)' attribute. clang 7 and newer will - * thus warn that atomic_fetch_or(&d->ram->int_pending, ...) + * thus warn that qatomic_fetch_or(&d->ram->int_pending, ...) * might be a misaligned atomic access, and will generate an * out-of-line call for it, which results in a link error since * we don't currently link against libatomic. @@ -1928,7 +1928,7 @@ static void qxl_send_events(PCIQXLDevice *d, uint32_t events) #define ALIGNED_UINT32_PTR(P) ((uint32_t *)P) #endif - old_pending = atomic_fetch_or(ALIGNED_UINT32_PTR(&d->ram->int_pending), + old_pending = qatomic_fetch_or(ALIGNED_UINT32_PTR(&d->ram->int_pending), le_events); if ((old_pending & le_events) == le_events) { return; diff --git a/hw/hyperv/hyperv.c b/hw/hyperv/hyperv.c index 4b26db1365..cb1074f234 100644 --- a/hw/hyperv/hyperv.c +++ b/hw/hyperv/hyperv.c @@ -231,7 +231,7 @@ static void sint_msg_bh(void *opaque) HvSintRoute *sint_route = opaque; HvSintStagedMessage *staged_msg = sint_route->staged_msg; - if (atomic_read(&staged_msg->state) != HV_STAGED_MSG_POSTED) { + if (qatomic_read(&staged_msg->state) != HV_STAGED_MSG_POSTED) { /* status nor ready yet (spurious ack from guest?), ignore */ return; } @@ -240,7 +240,7 @@ static void sint_msg_bh(void *opaque) staged_msg->status = 0; /* staged message processing finished, ready to start over */ - atomic_set(&staged_msg->state, HV_STAGED_MSG_FREE); + qatomic_set(&staged_msg->state, HV_STAGED_MSG_FREE); /* drop the reference taken in hyperv_post_msg */ hyperv_sint_route_unref(sint_route); } @@ -278,7 +278,7 @@ static void cpu_post_msg(CPUState *cs, run_on_cpu_data data) memory_region_set_dirty(&synic->msg_page_mr, 0, sizeof(*synic->msg_page)); posted: - atomic_set(&staged_msg->state, HV_STAGED_MSG_POSTED); + qatomic_set(&staged_msg->state, HV_STAGED_MSG_POSTED); /* * Notify the msg originator of the progress made; if the slot was busy we * set msg_pending flag in it so it will be the guest who will do EOM and @@ -301,7 +301,7 @@ int hyperv_post_msg(HvSintRoute *sint_route, struct hyperv_message *src_msg) assert(staged_msg); /* grab the staging area */ - if (atomic_cmpxchg(&staged_msg->state, HV_STAGED_MSG_FREE, + if (qatomic_cmpxchg(&staged_msg->state, HV_STAGED_MSG_FREE, HV_STAGED_MSG_BUSY) != HV_STAGED_MSG_FREE) { return -EAGAIN; } @@ -351,7 +351,7 @@ int hyperv_set_event_flag(HvSintRoute *sint_route, unsigned eventno) set_mask = BIT_MASK(eventno); flags = synic->event_page->slot[sint_route->sint].flags; - if ((atomic_fetch_or(&flags[set_idx], set_mask) & set_mask) != set_mask) { + if ((qatomic_fetch_or(&flags[set_idx], set_mask) & set_mask) != set_mask) { memory_region_set_dirty(&synic->event_page_mr, 0, sizeof(*synic->event_page)); ret = hyperv_sint_route_set_sint(sint_route); diff --git a/hw/hyperv/vmbus.c b/hw/hyperv/vmbus.c index 6ef895bc35..896e981f85 100644 --- a/hw/hyperv/vmbus.c +++ b/hw/hyperv/vmbus.c @@ -747,7 +747,7 @@ static int vmbus_channel_notify_guest(VMBusChannel *chan) idx = BIT_WORD(chan->id); mask = BIT_MASK(chan->id); - if ((atomic_fetch_or(&int_map[idx], mask) & mask) != mask) { + if ((qatomic_fetch_or(&int_map[idx], mask) & mask) != mask) { res = hyperv_sint_route_set_sint(chan->notify_route); dirty = len; } diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c index cde981bad6..a39a648ca6 100644 --- a/hw/i386/xen/xen-hvm.c +++ b/hw/i386/xen/xen-hvm.c @@ -1140,7 +1140,7 @@ static int handle_buffered_iopage(XenIOState *state) assert(req.dir == IOREQ_WRITE); assert(!req.data_is_ptr); - atomic_add(&buf_page->read_pointer, qw + 1); + qatomic_add(&buf_page->read_pointer, qw + 1); } return req.count; diff --git a/hw/intc/rx_icu.c b/hw/intc/rx_icu.c index df4b6a8d22..94e17a9dea 100644 --- a/hw/intc/rx_icu.c +++ b/hw/intc/rx_icu.c @@ -81,8 +81,8 @@ static void rxicu_request(RXICUState *icu, int n_IRQ) int enable; enable = icu->ier[n_IRQ / 8] & (1 << (n_IRQ & 7)); - if (n_IRQ > 0 && enable != 0 && atomic_read(&icu->req_irq) < 0) { - atomic_set(&icu->req_irq, n_IRQ); + if (n_IRQ > 0 && enable != 0 && qatomic_read(&icu->req_irq) < 0) { + qatomic_set(&icu->req_irq, n_IRQ); set_irq(icu, n_IRQ, rxicu_level(icu, n_IRQ)); } } @@ -124,10 +124,10 @@ static void rxicu_set_irq(void *opaque, int n_IRQ, int level) } if (issue == 0 && src->sense == TRG_LEVEL) { icu->ir[n_IRQ] = 0; - if (atomic_read(&icu->req_irq) == n_IRQ) { + if (qatomic_read(&icu->req_irq) == n_IRQ) { /* clear request */ set_irq(icu, n_IRQ, 0); - atomic_set(&icu->req_irq, -1); + qatomic_set(&icu->req_irq, -1); } return; } @@ -144,11 +144,11 @@ static void rxicu_ack_irq(void *opaque, int no, int level) int n_IRQ; int max_pri; - n_IRQ = atomic_read(&icu->req_irq); + n_IRQ = qatomic_read(&icu->req_irq); if (n_IRQ < 0) { return; } - atomic_set(&icu->req_irq, -1); + qatomic_set(&icu->req_irq, -1); if (icu->src[n_IRQ].sense != TRG_LEVEL) { icu->ir[n_IRQ] = 0; } diff --git a/hw/intc/sifive_plic.c b/hw/intc/sifive_plic.c index af611f8db8..f42fd695d8 100644 --- a/hw/intc/sifive_plic.c +++ b/hw/intc/sifive_plic.c @@ -89,12 +89,12 @@ static void sifive_plic_print_state(SiFivePLICState *plic) static uint32_t atomic_set_masked(uint32_t *a, uint32_t mask, uint32_t value) { - uint32_t old, new, cmp = atomic_read(a); + uint32_t old, new, cmp = qatomic_read(a); do { old = cmp; new = (old & ~mask) | (value & mask); - cmp = atomic_cmpxchg(a, old, new); + cmp = qatomic_cmpxchg(a, old, new); } while (old != cmp); return old; diff --git a/hw/misc/edu.c b/hw/misc/edu.c index 0ff9d1ac78..e935c418d4 100644 --- a/hw/misc/edu.c +++ b/hw/misc/edu.c @@ -212,7 +212,7 @@ static uint64_t edu_mmio_read(void *opaque, hwaddr addr, unsigned size) qemu_mutex_unlock(&edu->thr_mutex); break; case 0x20: - val = atomic_read(&edu->status); + val = qatomic_read(&edu->status); break; case 0x24: val = edu->irq_status; @@ -252,7 +252,7 @@ static void edu_mmio_write(void *opaque, hwaddr addr, uint64_t val, edu->addr4 = ~val; break; case 0x08: - if (atomic_read(&edu->status) & EDU_STATUS_COMPUTING) { + if (qatomic_read(&edu->status) & EDU_STATUS_COMPUTING) { break; } /* EDU_STATUS_COMPUTING cannot go 0->1 concurrently, because it is only @@ -260,15 +260,15 @@ static void edu_mmio_write(void *opaque, hwaddr addr, uint64_t val, */ qemu_mutex_lock(&edu->thr_mutex); edu->fact = val; - atomic_or(&edu->status, EDU_STATUS_COMPUTING); + qatomic_or(&edu->status, EDU_STATUS_COMPUTING); qemu_cond_signal(&edu->thr_cond); qemu_mutex_unlock(&edu->thr_mutex); break; case 0x20: if (val & EDU_STATUS_IRQFACT) { - atomic_or(&edu->status, EDU_STATUS_IRQFACT); + qatomic_or(&edu->status, EDU_STATUS_IRQFACT); } else { - atomic_and(&edu->status, ~EDU_STATUS_IRQFACT); + qatomic_and(&edu->status, ~EDU_STATUS_IRQFACT); } break; case 0x60: @@ -322,7 +322,7 @@ static void *edu_fact_thread(void *opaque) uint32_t val, ret = 1; qemu_mutex_lock(&edu->thr_mutex); - while ((atomic_read(&edu->status) & EDU_STATUS_COMPUTING) == 0 && + while ((qatomic_read(&edu->status) & EDU_STATUS_COMPUTING) == 0 && !edu->stopping) { qemu_cond_wait(&edu->thr_cond, &edu->thr_mutex); } @@ -347,9 +347,9 @@ static void *edu_fact_thread(void *opaque) qemu_mutex_lock(&edu->thr_mutex); edu->fact = ret; qemu_mutex_unlock(&edu->thr_mutex); - atomic_and(&edu->status, ~EDU_STATUS_COMPUTING); + qatomic_and(&edu->status, ~EDU_STATUS_COMPUTING); - if (atomic_read(&edu->status) & EDU_STATUS_IRQFACT) { + if (qatomic_read(&edu->status) & EDU_STATUS_IRQFACT) { qemu_mutex_lock_iothread(); edu_raise_irq(edu, FACT_IRQ); qemu_mutex_unlock_iothread(); diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index cb0d27084c..7bf27b9db7 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -933,7 +933,7 @@ static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) if (virtio_has_feature(features, VIRTIO_NET_F_STANDBY)) { qapi_event_send_failover_negotiated(n->netclient_name); - atomic_set(&n->primary_should_be_hidden, false); + qatomic_set(&n->primary_should_be_hidden, false); failover_add_primary(n, &err); if (err) { n->primary_dev = virtio_connect_failover_devices(n, n->qdev, &err); @@ -3168,7 +3168,7 @@ static void virtio_net_handle_migration_primary(VirtIONet *n, bool should_be_hidden; Error *err = NULL; - should_be_hidden = atomic_read(&n->primary_should_be_hidden); + should_be_hidden = qatomic_read(&n->primary_should_be_hidden); if (!n->primary_dev) { n->primary_dev = virtio_connect_failover_devices(n, n->qdev, &err); @@ -3183,7 +3183,7 @@ static void virtio_net_handle_migration_primary(VirtIONet *n, qdev_get_vmsd(n->primary_dev), n->primary_dev); qapi_event_send_unplug_primary(n->primary_device_id); - atomic_set(&n->primary_should_be_hidden, true); + qatomic_set(&n->primary_should_be_hidden, true); } else { warn_report("couldn't unplug primary device"); } @@ -3234,7 +3234,7 @@ static int virtio_net_primary_should_be_hidden(DeviceListener *listener, n->primary_device_opts = device_opts; /* primary_should_be_hidden is set during feature negotiation */ - hide = atomic_read(&n->primary_should_be_hidden); + hide = qatomic_read(&n->primary_should_be_hidden); if (n->primary_device_dict) { g_free(n->primary_device_id); @@ -3291,7 +3291,7 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp) if (n->failover) { n->primary_listener.should_be_hidden = virtio_net_primary_should_be_hidden; - atomic_set(&n->primary_should_be_hidden, true); + qatomic_set(&n->primary_should_be_hidden, true); device_listener_register(&n->primary_listener); n->migration_state.notify = virtio_net_migration_state_notifier; add_migration_state_change_notifier(&n->migration_state); diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c index db7e5c8be5..5de010b1fa 100644 --- a/hw/rdma/rdma_backend.c +++ b/hw/rdma/rdma_backend.c @@ -68,7 +68,7 @@ static void free_cqe_ctx(gpointer data, gpointer user_data) bctx = rdma_rm_get_cqe_ctx(rdma_dev_res, cqe_ctx_id); if (bctx) { rdma_rm_dealloc_cqe_ctx(rdma_dev_res, cqe_ctx_id); - atomic_dec(&rdma_dev_res->stats.missing_cqe); + qatomic_dec(&rdma_dev_res->stats.missing_cqe); } g_free(bctx); } @@ -81,7 +81,7 @@ static void clean_recv_mads(RdmaBackendDev *backend_dev) cqe_ctx_id = rdma_protected_qlist_pop_int64(&backend_dev-> recv_mads_list); if (cqe_ctx_id != -ENOENT) { - atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); + qatomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); free_cqe_ctx(GINT_TO_POINTER(cqe_ctx_id), backend_dev->rdma_dev_res); } @@ -123,7 +123,7 @@ static int rdma_poll_cq(RdmaDeviceResources *rdma_dev_res, struct ibv_cq *ibcq) } total_ne += ne; } while (ne > 0); - atomic_sub(&rdma_dev_res->stats.missing_cqe, total_ne); + qatomic_sub(&rdma_dev_res->stats.missing_cqe, total_ne); } if (ne < 0) { @@ -195,17 +195,17 @@ static void *comp_handler_thread(void *arg) static inline void disable_rdmacm_mux_async(RdmaBackendDev *backend_dev) { - atomic_set(&backend_dev->rdmacm_mux.can_receive, 0); + qatomic_set(&backend_dev->rdmacm_mux.can_receive, 0); } static inline void enable_rdmacm_mux_async(RdmaBackendDev *backend_dev) { - atomic_set(&backend_dev->rdmacm_mux.can_receive, sizeof(RdmaCmMuxMsg)); + qatomic_set(&backend_dev->rdmacm_mux.can_receive, sizeof(RdmaCmMuxMsg)); } static inline int rdmacm_mux_can_process_async(RdmaBackendDev *backend_dev) { - return atomic_read(&backend_dev->rdmacm_mux.can_receive); + return qatomic_read(&backend_dev->rdmacm_mux.can_receive); } static int rdmacm_mux_check_op_status(CharBackend *mad_chr_be) @@ -555,7 +555,7 @@ void rdma_backend_post_send(RdmaBackendDev *backend_dev, goto err_dealloc_cqe_ctx; } - atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); + qatomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); backend_dev->rdma_dev_res->stats.tx++; return; @@ -658,7 +658,7 @@ void rdma_backend_post_recv(RdmaBackendDev *backend_dev, goto err_dealloc_cqe_ctx; } - atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); + qatomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); backend_dev->rdma_dev_res->stats.rx_bufs++; return; @@ -710,7 +710,7 @@ void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev, goto err_dealloc_cqe_ctx; } - atomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); + qatomic_inc(&backend_dev->rdma_dev_res->stats.missing_cqe); backend_dev->rdma_dev_res->stats.rx_bufs++; backend_dev->rdma_dev_res->stats.rx_srq++; diff --git a/hw/rdma/rdma_rm.c b/hw/rdma/rdma_rm.c index 60957f88db..49141d4074 100644 --- a/hw/rdma/rdma_rm.c +++ b/hw/rdma/rdma_rm.c @@ -790,7 +790,7 @@ int rdma_rm_init(RdmaDeviceResources *dev_res, struct ibv_device_attr *dev_attr) qemu_mutex_init(&dev_res->lock); memset(&dev_res->stats, 0, sizeof(dev_res->stats)); - atomic_set(&dev_res->stats.missing_cqe, 0); + qatomic_set(&dev_res->stats.missing_cqe, 0); return 0; } diff --git a/hw/rdma/vmw/pvrdma_dev_ring.c b/hw/rdma/vmw/pvrdma_dev_ring.c index c122fe7035..f0bcde74b0 100644 --- a/hw/rdma/vmw/pvrdma_dev_ring.c +++ b/hw/rdma/vmw/pvrdma_dev_ring.c @@ -38,8 +38,8 @@ int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev, ring->max_elems = max_elems; ring->elem_sz = elem_sz; /* TODO: Give a moment to think if we want to redo driver settings - atomic_set(&ring->ring_state->prod_tail, 0); - atomic_set(&ring->ring_state->cons_head, 0); + qatomic_set(&ring->ring_state->prod_tail, 0); + qatomic_set(&ring->ring_state->cons_head, 0); */ ring->npages = npages; ring->pages = g_malloc(npages * sizeof(void *)); diff --git a/hw/s390x/meson.build b/hw/s390x/meson.build index b63782d87a..948ceae7a7 100644 --- a/hw/s390x/meson.build +++ b/hw/s390x/meson.build @@ -41,6 +41,7 @@ virtio_ss.add(when: 'CONFIG_VIRTIO_SCSI', if_true: files('virtio-ccw-scsi.c')) virtio_ss.add(when: 'CONFIG_VIRTIO_SERIAL', if_true: files('virtio-ccw-serial.c')) virtio_ss.add(when: ['CONFIG_VIRTIO_9P', 'CONFIG_VIRTFS'], if_true: files('virtio-ccw-blk.c')) virtio_ss.add(when: 'CONFIG_VHOST_VSOCK', if_true: files('vhost-vsock-ccw.c')) +virtio_ss.add(when: 'CONFIG_VHOST_USER_FS', if_true: files('vhost-user-fs-ccw.c')) s390x_ss.add_all(when: 'CONFIG_VIRTIO_CCW', if_true: virtio_ss) hw_arch += {'s390x': s390x_ss} diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index 92146a2119..fb4cee87a4 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -650,7 +650,7 @@ static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) actual = *ind_addr; do { expected = actual; - actual = atomic_cmpxchg(ind_addr, expected, expected | to_be_set); + actual = qatomic_cmpxchg(ind_addr, expected, expected | to_be_set); } while (actual != expected); cpu_physical_memory_unmap((void *)ind_addr, len, 1, len); diff --git a/hw/s390x/vhost-user-fs-ccw.c b/hw/s390x/vhost-user-fs-ccw.c new file mode 100644 index 0000000000..6c6f269293 --- /dev/null +++ b/hw/s390x/vhost-user-fs-ccw.c @@ -0,0 +1,75 @@ +/* + * virtio ccw vhost-user-fs implementation + * + * Copyright 2020 IBM Corp. + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ +#include "qemu/osdep.h" +#include "hw/qdev-properties.h" +#include "qapi/error.h" +#include "hw/virtio/vhost-user-fs.h" +#include "virtio-ccw.h" + +typedef struct VHostUserFSCcw { + VirtioCcwDevice parent_obj; + VHostUserFS vdev; +} VHostUserFSCcw; + +#define TYPE_VHOST_USER_FS_CCW "vhost-user-fs-ccw" +#define VHOST_USER_FS_CCW(obj) \ + OBJECT_CHECK(VHostUserFSCcw, (obj), TYPE_VHOST_USER_FS_CCW) + + +static Property vhost_user_fs_ccw_properties[] = { + DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, + VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, + VIRTIO_CCW_MAX_REV), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_user_fs_ccw_realize(VirtioCcwDevice *ccw_dev, Error **errp) +{ + VHostUserFSCcw *dev = VHOST_USER_FS_CCW(ccw_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + + qdev_realize(vdev, BUS(&ccw_dev->bus), errp); +} + +static void vhost_user_fs_ccw_instance_init(Object *obj) +{ + VHostUserFSCcw *dev = VHOST_USER_FS_CCW(obj); + VirtioCcwDevice *ccw_dev = VIRTIO_CCW_DEVICE(obj); + + ccw_dev->force_revision_1 = true; + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VHOST_USER_FS); +} + +static void vhost_user_fs_ccw_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); + + k->realize = vhost_user_fs_ccw_realize; + device_class_set_props(dc, vhost_user_fs_ccw_properties); + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); +} + +static const TypeInfo vhost_user_fs_ccw = { + .name = TYPE_VHOST_USER_FS_CCW, + .parent = TYPE_VIRTIO_CCW_DEVICE, + .instance_size = sizeof(VHostUserFSCcw), + .instance_init = vhost_user_fs_ccw_instance_init, + .class_init = vhost_user_fs_ccw_class_init, +}; + +static void vhost_user_fs_ccw_register(void) +{ + type_register_static(&vhost_user_fs_ccw); +} + +type_init(vhost_user_fs_ccw_register) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 8feb3451a0..8d140dc50f 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -800,7 +800,7 @@ static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, actual = *ind_addr; do { expected = actual; - actual = atomic_cmpxchg(ind_addr, expected, expected | to_be_set); + actual = qatomic_cmpxchg(ind_addr, expected, expected | to_be_set); } while (actual != expected); trace_virtio_ccw_set_ind(ind_loc, actual, actual | to_be_set); cpu_physical_memory_unmap((void *)ind_addr, len, 1, len); diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 1a1384e7a6..0119516254 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -90,7 +90,7 @@ static void vhost_dev_sync_region(struct vhost_dev *dev, } /* Data must be read atomically. We don't really need barrier semantics * but it's easier to use atomic_* than roll our own. */ - log = atomic_xchg(from, 0); + log = qatomic_xchg(from, 0); while (log) { int bit = ctzl(log); hwaddr page_addr; diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index 6da12e315f..54f9bbb789 100644 --- a/hw/virtio/virtio-crypto.c +++ b/hw/virtio/virtio-crypto.c @@ -228,6 +228,8 @@ static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) size_t s; for (;;) { + g_autofree struct iovec *out_iov_copy = NULL; + elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); if (!elem) { break; @@ -240,9 +242,12 @@ static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) } out_num = elem->out_num; - out_iov = elem->out_sg; + out_iov_copy = g_memdup(elem->out_sg, sizeof(out_iov[0]) * out_num); + out_iov = out_iov_copy; + in_num = elem->in_num; in_iov = elem->in_sg; + if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl)) != sizeof(ctrl))) { virtio_error(vdev, "virtio-crypto request ctrl_hdr too short"); @@ -582,6 +587,8 @@ virtio_crypto_handle_request(VirtIOCryptoReq *request) int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq)); struct virtio_crypto_op_data_req req; int ret; + g_autofree struct iovec *in_iov_copy = NULL; + g_autofree struct iovec *out_iov_copy = NULL; struct iovec *in_iov; struct iovec *out_iov; unsigned in_num; @@ -598,9 +605,13 @@ virtio_crypto_handle_request(VirtIOCryptoReq *request) } out_num = elem->out_num; - out_iov = elem->out_sg; + out_iov_copy = g_memdup(elem->out_sg, sizeof(out_iov[0]) * out_num); + out_iov = out_iov_copy; + in_num = elem->in_num; - in_iov = elem->in_sg; + in_iov_copy = g_memdup(elem->in_sg, sizeof(in_iov[0]) * in_num); + in_iov = in_iov_copy; + if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req)) != sizeof(req))) { virtio_error(vdev, "virtio-crypto request outhdr too short"); diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index f12d1595aa..e1b5c3b81e 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -179,7 +179,7 @@ static uint64_t virtio_mmio_read(void *opaque, hwaddr offset, unsigned size) } return proxy->vqs[vdev->queue_sel].enabled; case VIRTIO_MMIO_INTERRUPT_STATUS: - return atomic_read(&vdev->isr); + return qatomic_read(&vdev->isr); case VIRTIO_MMIO_STATUS: return vdev->status; case VIRTIO_MMIO_CONFIG_GENERATION: @@ -370,7 +370,7 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value, } break; case VIRTIO_MMIO_INTERRUPT_ACK: - atomic_and(&vdev->isr, ~value); + qatomic_and(&vdev->isr, ~value); virtio_update_irq(vdev); break; case VIRTIO_MMIO_STATUS: @@ -496,7 +496,7 @@ static void virtio_mmio_update_irq(DeviceState *opaque, uint16_t vector) if (!vdev) { return; } - level = (atomic_read(&vdev->isr) != 0); + level = (qatomic_read(&vdev->isr) != 0); trace_virtio_mmio_setting_irq(level); qemu_set_irq(proxy->irq, level); } diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 5bc769f685..02790e3237 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -72,7 +72,7 @@ static void virtio_pci_notify(DeviceState *d, uint16_t vector) msix_notify(&proxy->pci_dev, vector); else { VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1); + pci_set_irq(&proxy->pci_dev, qatomic_read(&vdev->isr) & 1); } } @@ -398,7 +398,7 @@ static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr) break; case VIRTIO_PCI_ISR: /* reading from the ISR also clears it. */ - ret = atomic_xchg(&vdev->isr, 0); + ret = qatomic_xchg(&vdev->isr, 0); pci_irq_deassert(&proxy->pci_dev); break; case VIRTIO_MSI_CONFIG_VECTOR: @@ -1362,7 +1362,7 @@ static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr, { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - uint64_t val = atomic_xchg(&vdev->isr, 0); + uint64_t val = qatomic_xchg(&vdev->isr, 0); pci_irq_deassert(&proxy->pci_dev); return val; diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index e983025217..3a3d012d9f 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -149,8 +149,8 @@ static void virtio_virtqueue_reset_region_cache(struct VirtQueue *vq) { VRingMemoryRegionCaches *caches; - caches = atomic_read(&vq->vring.caches); - atomic_rcu_set(&vq->vring.caches, NULL); + caches = qatomic_read(&vq->vring.caches); + qatomic_rcu_set(&vq->vring.caches, NULL); if (caches) { call_rcu(caches, virtio_free_region_cache, rcu); } @@ -197,7 +197,7 @@ static void virtio_init_region_cache(VirtIODevice *vdev, int n) goto err_avail; } - atomic_rcu_set(&vq->vring.caches, new); + qatomic_rcu_set(&vq->vring.caches, new); if (old) { call_rcu(old, virtio_free_region_cache, rcu); } @@ -283,7 +283,7 @@ static void vring_packed_flags_write(VirtIODevice *vdev, /* Called within rcu_read_lock(). */ static VRingMemoryRegionCaches *vring_get_region_caches(struct VirtQueue *vq) { - return atomic_rcu_read(&vq->vring.caches); + return qatomic_rcu_read(&vq->vring.caches); } /* Called within rcu_read_lock(). */ @@ -2007,7 +2007,7 @@ void virtio_reset(void *opaque) vdev->queue_sel = 0; vdev->status = 0; vdev->disabled = false; - atomic_set(&vdev->isr, 0); + qatomic_set(&vdev->isr, 0); vdev->config_vector = VIRTIO_NO_VECTOR; virtio_notify_vector(vdev, vdev->config_vector); @@ -2439,13 +2439,13 @@ void virtio_del_queue(VirtIODevice *vdev, int n) static void virtio_set_isr(VirtIODevice *vdev, int value) { - uint8_t old = atomic_read(&vdev->isr); + uint8_t old = qatomic_read(&vdev->isr); /* Do not write ISR if it does not change, so that its cacheline remains * shared in the common case where the guest does not read it. */ if ((old & value) != value) { - atomic_or(&vdev->isr, value); + qatomic_or(&vdev->isr, value); } } @@ -3254,7 +3254,7 @@ void virtio_init(VirtIODevice *vdev, const char *name, vdev->started = false; vdev->device_id = device_id; vdev->status = 0; - atomic_set(&vdev->isr, 0); + qatomic_set(&vdev->isr, 0); vdev->queue_sel = 0; vdev->config_vector = VIRTIO_NO_VECTOR; vdev->vq = g_malloc0(sizeof(VirtQueue) * VIRTIO_QUEUE_MAX); diff --git a/hw/xtensa/pic_cpu.c b/hw/xtensa/pic_cpu.c index 1d5982a9e4..6c9447565d 100644 --- a/hw/xtensa/pic_cpu.c +++ b/hw/xtensa/pic_cpu.c @@ -72,9 +72,9 @@ static void xtensa_set_irq(void *opaque, int irq, int active) uint32_t irq_bit = 1 << irq; if (active) { - atomic_or(&env->sregs[INTSET], irq_bit); + qatomic_or(&env->sregs[INTSET], irq_bit); } else if (env->config->interrupt[irq].inttype == INTTYPE_LEVEL) { - atomic_and(&env->sregs[INTSET], ~irq_bit); + qatomic_and(&env->sregs[INTSET], ~irq_bit); } check_interrupts(env); diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h index 716d2639df..b39eefb38d 100644 --- a/include/block/aio-wait.h +++ b/include/block/aio-wait.h @@ -80,7 +80,7 @@ extern AioWait global_aio_wait; AioWait *wait_ = &global_aio_wait; \ AioContext *ctx_ = (ctx); \ /* Increment wait_->num_waiters before evaluating cond. */ \ - atomic_inc(&wait_->num_waiters); \ + qatomic_inc(&wait_->num_waiters); \ if (ctx_ && in_aio_context_home_thread(ctx_)) { \ while ((cond)) { \ aio_poll(ctx_, true); \ @@ -100,7 +100,7 @@ extern AioWait global_aio_wait; waited_ = true; \ } \ } \ - atomic_dec(&wait_->num_waiters); \ + qatomic_dec(&wait_->num_waiters); \ waited_; }) /** diff --git a/include/block/aio.h b/include/block/aio.h index b2f703fa3f..ec8c5af642 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -595,7 +595,7 @@ int64_t aio_compute_timeout(AioContext *ctx); */ static inline void aio_disable_external(AioContext *ctx) { - atomic_inc(&ctx->external_disable_cnt); + qatomic_inc(&ctx->external_disable_cnt); } /** @@ -608,7 +608,7 @@ static inline void aio_enable_external(AioContext *ctx) { int old; - old = atomic_fetch_dec(&ctx->external_disable_cnt); + old = qatomic_fetch_dec(&ctx->external_disable_cnt); assert(old > 0); if (old == 1) { /* Kick event loop so it re-arms file descriptors */ @@ -624,7 +624,7 @@ static inline void aio_enable_external(AioContext *ctx) */ static inline bool aio_external_disabled(AioContext *ctx) { - return atomic_read(&ctx->external_disable_cnt); + return qatomic_read(&ctx->external_disable_cnt); } /** @@ -637,7 +637,7 @@ static inline bool aio_external_disabled(AioContext *ctx) */ static inline bool aio_node_check(AioContext *ctx, bool is_external) { - return !is_external || !atomic_read(&ctx->external_disable_cnt); + return !is_external || !qatomic_read(&ctx->external_disable_cnt); } /** diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h index c14a48f65e..30605edab9 100644 --- a/include/exec/cpu_ldst.h +++ b/include/exec/cpu_ldst.h @@ -299,7 +299,7 @@ static inline target_ulong tlb_addr_write(const CPUTLBEntry *entry) #if TCG_OVERSIZED_GUEST return entry->addr_write; #else - return atomic_read(&entry->addr_write); + return qatomic_read(&entry->addr_write); #endif } diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 3cf88272df..1fe28d574f 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -89,7 +89,7 @@ void QEMU_NORETURN cpu_loop_exit_atomic(CPUState *cpu, uintptr_t pc); */ static inline bool cpu_loop_exit_requested(CPUState *cpu) { - return (int32_t)atomic_read(&cpu_neg(cpu)->icount_decr.u32) < 0; + return (int32_t)qatomic_read(&cpu_neg(cpu)->icount_decr.u32) < 0; } #if !defined(CONFIG_USER_ONLY) @@ -487,10 +487,10 @@ struct TranslationBlock { extern bool parallel_cpus; -/* Hide the atomic_read to make code a little easier on the eyes */ +/* Hide the qatomic_read to make code a little easier on the eyes */ static inline uint32_t tb_cflags(const TranslationBlock *tb) { - return atomic_read(&tb->cflags); + return qatomic_read(&tb->cflags); } /* current cflags for hashing/comparison */ diff --git a/include/exec/log.h b/include/exec/log.h index 3ed797c1c8..86871f403a 100644 --- a/include/exec/log.h +++ b/include/exec/log.h @@ -19,7 +19,7 @@ static inline void log_cpu_state(CPUState *cpu, int flags) if (qemu_log_enabled()) { rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { cpu_dump_state(cpu, logfile->fd, flags); } @@ -49,7 +49,7 @@ static inline void log_target_disas(CPUState *cpu, target_ulong start, { QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { target_disas(logfile->fd, cpu, start, len); } @@ -60,7 +60,7 @@ static inline void log_disas(void *code, unsigned long size, const char *note) { QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { disas(logfile->fd, code, size, note); } diff --git a/include/exec/memory.h b/include/exec/memory.h index f1bb2a7df5..06b85e3a73 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -685,7 +685,7 @@ struct FlatView { static inline FlatView *address_space_to_flatview(AddressSpace *as) { - return atomic_rcu_read(&as->current_map); + return qatomic_rcu_read(&as->current_map); } diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index 3ef729a23c..c6d2ef1d07 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -164,7 +164,7 @@ static inline bool cpu_physical_memory_get_dirty(ram_addr_t start, page = start >> TARGET_PAGE_BITS; WITH_RCU_READ_LOCK_GUARD() { - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); idx = page / DIRTY_MEMORY_BLOCK_SIZE; offset = page % DIRTY_MEMORY_BLOCK_SIZE; @@ -205,7 +205,7 @@ static inline bool cpu_physical_memory_all_dirty(ram_addr_t start, RCU_READ_LOCK_GUARD(); - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); idx = page / DIRTY_MEMORY_BLOCK_SIZE; offset = page % DIRTY_MEMORY_BLOCK_SIZE; @@ -278,7 +278,7 @@ static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr, RCU_READ_LOCK_GUARD(); - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); + blocks = qatomic_rcu_read(&ram_list.dirty_memory[client]); set_bit_atomic(offset, blocks->blocks[idx]); } @@ -301,7 +301,7 @@ static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, WITH_RCU_READ_LOCK_GUARD() { for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i]); + blocks[i] = qatomic_rcu_read(&ram_list.dirty_memory[i]); } idx = page / DIRTY_MEMORY_BLOCK_SIZE; @@ -361,23 +361,25 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, WITH_RCU_READ_LOCK_GUARD() { for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - blocks[i] = atomic_rcu_read(&ram_list.dirty_memory[i])->blocks; + blocks[i] = + qatomic_rcu_read(&ram_list.dirty_memory[i])->blocks; } for (k = 0; k < nr; k++) { if (bitmap[k]) { unsigned long temp = leul_to_cpu(bitmap[k]); - atomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp); + qatomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp); if (global_dirty_log) { - atomic_or(&blocks[DIRTY_MEMORY_MIGRATION][idx][offset], - temp); + qatomic_or( + &blocks[DIRTY_MEMORY_MIGRATION][idx][offset], + temp); } if (tcg_enabled()) { - atomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], - temp); + qatomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset], + temp); } } @@ -461,12 +463,12 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb, DIRTY_MEMORY_BLOCK_SIZE); unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); - src = atomic_rcu_read( + src = qatomic_rcu_read( &ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION])->blocks; for (k = page; k < page + nr; k++) { if (src[idx][offset]) { - unsigned long bits = atomic_xchg(&src[idx][offset], 0); + unsigned long bits = qatomic_xchg(&src[idx][offset], 0); unsigned long new_dirty; new_dirty = ~dest[k]; dest[k] |= bits; diff --git a/include/exec/ramlist.h b/include/exec/ramlist.h index bc4faa1b00..26704aa3b0 100644 --- a/include/exec/ramlist.h +++ b/include/exec/ramlist.h @@ -19,7 +19,7 @@ typedef struct RAMBlockNotifier RAMBlockNotifier; * rcu_read_lock(); * * DirtyMemoryBlocks *blocks = - * atomic_rcu_read(&ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION]); + * qatomic_rcu_read(&ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION]); * * ram_addr_t idx = (addr >> TARGET_PAGE_BITS) / DIRTY_MEMORY_BLOCK_SIZE; * unsigned long *block = blocks.blocks[idx]; diff --git a/include/exec/tb-lookup.h b/include/exec/tb-lookup.h index 26921b6daf..9cf475bb03 100644 --- a/include/exec/tb-lookup.h +++ b/include/exec/tb-lookup.h @@ -27,7 +27,7 @@ tb_lookup__cpu_state(CPUState *cpu, target_ulong *pc, target_ulong *cs_base, cpu_get_tb_cpu_state(env, pc, cs_base, flags); hash = tb_jmp_cache_hash_func(*pc); - tb = atomic_rcu_read(&cpu->tb_jmp_cache[hash]); + tb = qatomic_rcu_read(&cpu->tb_jmp_cache[hash]); cf_mask &= ~CF_CLUSTER_MASK; cf_mask |= cpu->cluster_index << CF_CLUSTER_SHIFT; @@ -44,7 +44,7 @@ tb_lookup__cpu_state(CPUState *cpu, target_ulong *pc, target_ulong *cs_base, if (tb == NULL) { return NULL; } - atomic_set(&cpu->tb_jmp_cache[hash], tb); + qatomic_set(&cpu->tb_jmp_cache[hash], tb); return tb; } diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index 99dc33ffeb..6c34798c8b 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -482,7 +482,7 @@ static inline void cpu_tb_jmp_cache_clear(CPUState *cpu) unsigned int i; for (i = 0; i < TB_JMP_CACHE_SIZE; i++) { - atomic_set(&cpu->tb_jmp_cache[i], NULL); + qatomic_set(&cpu->tb_jmp_cache[i], NULL); } } diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h index 5953cf8961..214ab74822 100644 --- a/include/hw/virtio/virtio-blk.h +++ b/include/hw/virtio/virtio-blk.h @@ -70,6 +70,8 @@ typedef struct VirtIOBlockReq { int64_t sector_num; VirtIOBlock *dev; VirtQueue *vq; + IOVDiscardUndo inhdr_undo; + IOVDiscardUndo outhdr_undo; struct virtio_blk_inhdr *in; struct virtio_blk_outhdr out; QEMUIOVector qiov; diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h index ff72db5115..c1d211a351 100644 --- a/include/qemu/atomic.h +++ b/include/qemu/atomic.h @@ -125,49 +125,49 @@ * no effect on the generated code but not using the atomic primitives * will get flagged by sanitizers as a violation. */ -#define atomic_read__nocheck(ptr) \ +#define qatomic_read__nocheck(ptr) \ __atomic_load_n(ptr, __ATOMIC_RELAXED) -#define atomic_read(ptr) \ - ({ \ +#define qatomic_read(ptr) \ + ({ \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ - atomic_read__nocheck(ptr); \ + qatomic_read__nocheck(ptr); \ }) -#define atomic_set__nocheck(ptr, i) \ +#define qatomic_set__nocheck(ptr, i) \ __atomic_store_n(ptr, i, __ATOMIC_RELAXED) -#define atomic_set(ptr, i) do { \ +#define qatomic_set(ptr, i) do { \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ - atomic_set__nocheck(ptr, i); \ + qatomic_set__nocheck(ptr, i); \ } while(0) /* See above: most compilers currently treat consume and acquire the - * same, but this slows down atomic_rcu_read unnecessarily. + * same, but this slows down qatomic_rcu_read unnecessarily. */ #ifdef __SANITIZE_THREAD__ -#define atomic_rcu_read__nocheck(ptr, valptr) \ +#define qatomic_rcu_read__nocheck(ptr, valptr) \ __atomic_load(ptr, valptr, __ATOMIC_CONSUME); #else -#define atomic_rcu_read__nocheck(ptr, valptr) \ - __atomic_load(ptr, valptr, __ATOMIC_RELAXED); \ +#define qatomic_rcu_read__nocheck(ptr, valptr) \ + __atomic_load(ptr, valptr, __ATOMIC_RELAXED); \ smp_read_barrier_depends(); #endif -#define atomic_rcu_read(ptr) \ - ({ \ +#define qatomic_rcu_read(ptr) \ + ({ \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ - typeof_strip_qual(*ptr) _val; \ - atomic_rcu_read__nocheck(ptr, &_val); \ - _val; \ + typeof_strip_qual(*ptr) _val; \ + qatomic_rcu_read__nocheck(ptr, &_val); \ + _val; \ }) -#define atomic_rcu_set(ptr, i) do { \ +#define qatomic_rcu_set(ptr, i) do { \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ - __atomic_store_n(ptr, i, __ATOMIC_RELEASE); \ + __atomic_store_n(ptr, i, __ATOMIC_RELEASE); \ } while(0) -#define atomic_load_acquire(ptr) \ +#define qatomic_load_acquire(ptr) \ ({ \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ typeof_strip_qual(*ptr) _val; \ @@ -175,7 +175,7 @@ _val; \ }) -#define atomic_store_release(ptr, i) do { \ +#define qatomic_store_release(ptr, i) do { \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ __atomic_store_n(ptr, i, __ATOMIC_RELEASE); \ } while(0) @@ -183,56 +183,61 @@ /* All the remaining operations are fully sequentially consistent */ -#define atomic_xchg__nocheck(ptr, i) ({ \ +#define qatomic_xchg__nocheck(ptr, i) ({ \ __atomic_exchange_n(ptr, (i), __ATOMIC_SEQ_CST); \ }) -#define atomic_xchg(ptr, i) ({ \ +#define qatomic_xchg(ptr, i) ({ \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ - atomic_xchg__nocheck(ptr, i); \ + qatomic_xchg__nocheck(ptr, i); \ }) /* Returns the eventual value, failed or not */ -#define atomic_cmpxchg__nocheck(ptr, old, new) ({ \ +#define qatomic_cmpxchg__nocheck(ptr, old, new) ({ \ typeof_strip_qual(*ptr) _old = (old); \ (void)__atomic_compare_exchange_n(ptr, &_old, new, false, \ __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \ _old; \ }) -#define atomic_cmpxchg(ptr, old, new) ({ \ +#define qatomic_cmpxchg(ptr, old, new) ({ \ QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE); \ - atomic_cmpxchg__nocheck(ptr, old, new); \ + qatomic_cmpxchg__nocheck(ptr, old, new); \ }) /* Provide shorter names for GCC atomic builtins, return old value */ -#define atomic_fetch_inc(ptr) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST) -#define atomic_fetch_dec(ptr) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST) - -#ifndef atomic_fetch_add -#define atomic_fetch_add(ptr, n) __atomic_fetch_add(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_fetch_sub(ptr, n) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_fetch_xor(ptr, n) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST) -#endif - -#define atomic_inc_fetch(ptr) __atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST) -#define atomic_dec_fetch(ptr) __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST) -#define atomic_add_fetch(ptr, n) __atomic_add_fetch(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_sub_fetch(ptr, n) __atomic_sub_fetch(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_and_fetch(ptr, n) __atomic_and_fetch(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_or_fetch(ptr, n) __atomic_or_fetch(ptr, n, __ATOMIC_SEQ_CST) -#define atomic_xor_fetch(ptr, n) __atomic_xor_fetch(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_fetch_inc(ptr) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST) +#define qatomic_fetch_dec(ptr) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST) + +#define qatomic_fetch_add(ptr, n) __atomic_fetch_add(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_fetch_sub(ptr, n) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_fetch_xor(ptr, n) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST) + +#define qatomic_inc_fetch(ptr) __atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST) +#define qatomic_dec_fetch(ptr) __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST) +#define qatomic_add_fetch(ptr, n) __atomic_add_fetch(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_sub_fetch(ptr, n) __atomic_sub_fetch(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_and_fetch(ptr, n) __atomic_and_fetch(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_or_fetch(ptr, n) __atomic_or_fetch(ptr, n, __ATOMIC_SEQ_CST) +#define qatomic_xor_fetch(ptr, n) __atomic_xor_fetch(ptr, n, __ATOMIC_SEQ_CST) /* And even shorter names that return void. */ -#define atomic_inc(ptr) ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST)) -#define atomic_dec(ptr) ((void) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST)) -#define atomic_add(ptr, n) ((void) __atomic_fetch_add(ptr, n, __ATOMIC_SEQ_CST)) -#define atomic_sub(ptr, n) ((void) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST)) -#define atomic_and(ptr, n) ((void) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST)) -#define atomic_or(ptr, n) ((void) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST)) -#define atomic_xor(ptr, n) ((void) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST)) +#define qatomic_inc(ptr) \ + ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST)) +#define qatomic_dec(ptr) \ + ((void) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST)) +#define qatomic_add(ptr, n) \ + ((void) __atomic_fetch_add(ptr, n, __ATOMIC_SEQ_CST)) +#define qatomic_sub(ptr, n) \ + ((void) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST)) +#define qatomic_and(ptr, n) \ + ((void) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST)) +#define qatomic_or(ptr, n) \ + ((void) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST)) +#define qatomic_xor(ptr, n) \ + ((void) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST)) #else /* __ATOMIC_RELAXED */ @@ -272,7 +277,7 @@ * but it is a full barrier at the hardware level. Add a compiler barrier * to make it a full barrier also at the compiler level. */ -#define atomic_xchg(ptr, i) (barrier(), __sync_lock_test_and_set(ptr, i)) +#define qatomic_xchg(ptr, i) (barrier(), __sync_lock_test_and_set(ptr, i)) #elif defined(_ARCH_PPC) @@ -325,14 +330,14 @@ /* These will only be atomic if the processor does the fetch or store * in a single issue memory operation */ -#define atomic_read__nocheck(p) (*(__typeof__(*(p)) volatile*) (p)) -#define atomic_set__nocheck(p, i) ((*(__typeof__(*(p)) volatile*) (p)) = (i)) +#define qatomic_read__nocheck(p) (*(__typeof__(*(p)) volatile*) (p)) +#define qatomic_set__nocheck(p, i) ((*(__typeof__(*(p)) volatile*) (p)) = (i)) -#define atomic_read(ptr) atomic_read__nocheck(ptr) -#define atomic_set(ptr, i) atomic_set__nocheck(ptr,i) +#define qatomic_read(ptr) qatomic_read__nocheck(ptr) +#define qatomic_set(ptr, i) qatomic_set__nocheck(ptr,i) /** - * atomic_rcu_read - reads a RCU-protected pointer to a local variable + * qatomic_rcu_read - reads a RCU-protected pointer to a local variable * into a RCU read-side critical section. The pointer can later be safely * dereferenced within the critical section. * @@ -342,21 +347,21 @@ * Inserts memory barriers on architectures that require them (currently only * Alpha) and documents which pointers are protected by RCU. * - * atomic_rcu_read also includes a compiler barrier to ensure that + * qatomic_rcu_read also includes a compiler barrier to ensure that * value-speculative optimizations (e.g. VSS: Value Speculation * Scheduling) does not perform the data read before the pointer read * by speculating the value of the pointer. * - * Should match atomic_rcu_set(), atomic_xchg(), atomic_cmpxchg(). + * Should match qatomic_rcu_set(), qatomic_xchg(), qatomic_cmpxchg(). */ -#define atomic_rcu_read(ptr) ({ \ - typeof(*ptr) _val = atomic_read(ptr); \ +#define qatomic_rcu_read(ptr) ({ \ + typeof(*ptr) _val = qatomic_read(ptr); \ smp_read_barrier_depends(); \ _val; \ }) /** - * atomic_rcu_set - assigns (publicizes) a pointer to a new data structure + * qatomic_rcu_set - assigns (publicizes) a pointer to a new data structure * meant to be read by RCU read-side critical sections. * * Documents which pointers will be dereferenced by RCU read-side critical @@ -364,65 +369,64 @@ * them. It also makes sure the compiler does not reorder code initializing the * data structure before its publication. * - * Should match atomic_rcu_read(). + * Should match qatomic_rcu_read(). */ -#define atomic_rcu_set(ptr, i) do { \ +#define qatomic_rcu_set(ptr, i) do { \ smp_wmb(); \ - atomic_set(ptr, i); \ + qatomic_set(ptr, i); \ } while (0) -#define atomic_load_acquire(ptr) ({ \ - typeof(*ptr) _val = atomic_read(ptr); \ +#define qatomic_load_acquire(ptr) ({ \ + typeof(*ptr) _val = qatomic_read(ptr); \ smp_mb_acquire(); \ _val; \ }) -#define atomic_store_release(ptr, i) do { \ +#define qatomic_store_release(ptr, i) do { \ smp_mb_release(); \ - atomic_set(ptr, i); \ + qatomic_set(ptr, i); \ } while (0) -#ifndef atomic_xchg +#ifndef qatomic_xchg #if defined(__clang__) -#define atomic_xchg(ptr, i) __sync_swap(ptr, i) +#define qatomic_xchg(ptr, i) __sync_swap(ptr, i) #else /* __sync_lock_test_and_set() is documented to be an acquire barrier only. */ -#define atomic_xchg(ptr, i) (smp_mb(), __sync_lock_test_and_set(ptr, i)) +#define qatomic_xchg(ptr, i) (smp_mb(), __sync_lock_test_and_set(ptr, i)) #endif #endif -#define atomic_xchg__nocheck atomic_xchg +#define qatomic_xchg__nocheck qatomic_xchg /* Provide shorter names for GCC atomic builtins. */ -#define atomic_fetch_inc(ptr) __sync_fetch_and_add(ptr, 1) -#define atomic_fetch_dec(ptr) __sync_fetch_and_add(ptr, -1) - -#ifndef atomic_fetch_add -#define atomic_fetch_add(ptr, n) __sync_fetch_and_add(ptr, n) -#define atomic_fetch_sub(ptr, n) __sync_fetch_and_sub(ptr, n) -#define atomic_fetch_and(ptr, n) __sync_fetch_and_and(ptr, n) -#define atomic_fetch_or(ptr, n) __sync_fetch_and_or(ptr, n) -#define atomic_fetch_xor(ptr, n) __sync_fetch_and_xor(ptr, n) -#endif - -#define atomic_inc_fetch(ptr) __sync_add_and_fetch(ptr, 1) -#define atomic_dec_fetch(ptr) __sync_add_and_fetch(ptr, -1) -#define atomic_add_fetch(ptr, n) __sync_add_and_fetch(ptr, n) -#define atomic_sub_fetch(ptr, n) __sync_sub_and_fetch(ptr, n) -#define atomic_and_fetch(ptr, n) __sync_and_and_fetch(ptr, n) -#define atomic_or_fetch(ptr, n) __sync_or_and_fetch(ptr, n) -#define atomic_xor_fetch(ptr, n) __sync_xor_and_fetch(ptr, n) - -#define atomic_cmpxchg(ptr, old, new) __sync_val_compare_and_swap(ptr, old, new) -#define atomic_cmpxchg__nocheck(ptr, old, new) atomic_cmpxchg(ptr, old, new) +#define qatomic_fetch_inc(ptr) __sync_fetch_and_add(ptr, 1) +#define qatomic_fetch_dec(ptr) __sync_fetch_and_add(ptr, -1) + +#define qatomic_fetch_add(ptr, n) __sync_fetch_and_add(ptr, n) +#define qatomic_fetch_sub(ptr, n) __sync_fetch_and_sub(ptr, n) +#define qatomic_fetch_and(ptr, n) __sync_fetch_and_and(ptr, n) +#define qatomic_fetch_or(ptr, n) __sync_fetch_and_or(ptr, n) +#define qatomic_fetch_xor(ptr, n) __sync_fetch_and_xor(ptr, n) + +#define qatomic_inc_fetch(ptr) __sync_add_and_fetch(ptr, 1) +#define qatomic_dec_fetch(ptr) __sync_add_and_fetch(ptr, -1) +#define qatomic_add_fetch(ptr, n) __sync_add_and_fetch(ptr, n) +#define qatomic_sub_fetch(ptr, n) __sync_sub_and_fetch(ptr, n) +#define qatomic_and_fetch(ptr, n) __sync_and_and_fetch(ptr, n) +#define qatomic_or_fetch(ptr, n) __sync_or_and_fetch(ptr, n) +#define qatomic_xor_fetch(ptr, n) __sync_xor_and_fetch(ptr, n) + +#define qatomic_cmpxchg(ptr, old, new) \ + __sync_val_compare_and_swap(ptr, old, new) +#define qatomic_cmpxchg__nocheck(ptr, old, new) qatomic_cmpxchg(ptr, old, new) /* And even shorter names that return void. */ -#define atomic_inc(ptr) ((void) __sync_fetch_and_add(ptr, 1)) -#define atomic_dec(ptr) ((void) __sync_fetch_and_add(ptr, -1)) -#define atomic_add(ptr, n) ((void) __sync_fetch_and_add(ptr, n)) -#define atomic_sub(ptr, n) ((void) __sync_fetch_and_sub(ptr, n)) -#define atomic_and(ptr, n) ((void) __sync_fetch_and_and(ptr, n)) -#define atomic_or(ptr, n) ((void) __sync_fetch_and_or(ptr, n)) -#define atomic_xor(ptr, n) ((void) __sync_fetch_and_xor(ptr, n)) +#define qatomic_inc(ptr) ((void) __sync_fetch_and_add(ptr, 1)) +#define qatomic_dec(ptr) ((void) __sync_fetch_and_add(ptr, -1)) +#define qatomic_add(ptr, n) ((void) __sync_fetch_and_add(ptr, n)) +#define qatomic_sub(ptr, n) ((void) __sync_fetch_and_sub(ptr, n)) +#define qatomic_and(ptr, n) ((void) __sync_fetch_and_and(ptr, n)) +#define qatomic_or(ptr, n) ((void) __sync_fetch_and_or(ptr, n)) +#define qatomic_xor(ptr, n) ((void) __sync_fetch_and_xor(ptr, n)) #endif /* __ATOMIC_RELAXED */ @@ -436,11 +440,11 @@ /* This is more efficient than a store plus a fence. */ #if !defined(__SANITIZE_THREAD__) #if defined(__i386__) || defined(__x86_64__) || defined(__s390x__) -#define atomic_mb_set(ptr, i) ((void)atomic_xchg(ptr, i)) +#define qatomic_mb_set(ptr, i) ((void)qatomic_xchg(ptr, i)) #endif #endif -/* atomic_mb_read/set semantics map Java volatile variables. They are +/* qatomic_mb_read/set semantics map Java volatile variables. They are * less expensive on some platforms (notably POWER) than fully * sequentially consistent operations. * @@ -448,58 +452,58 @@ * use. See docs/devel/atomics.txt for more discussion. */ -#ifndef atomic_mb_read -#define atomic_mb_read(ptr) \ - atomic_load_acquire(ptr) +#ifndef qatomic_mb_read +#define qatomic_mb_read(ptr) \ + qatomic_load_acquire(ptr) #endif -#ifndef atomic_mb_set -#define atomic_mb_set(ptr, i) do { \ - atomic_store_release(ptr, i); \ +#ifndef qatomic_mb_set +#define qatomic_mb_set(ptr, i) do { \ + qatomic_store_release(ptr, i); \ smp_mb(); \ } while(0) #endif -#define atomic_fetch_inc_nonzero(ptr) ({ \ - typeof_strip_qual(*ptr) _oldn = atomic_read(ptr); \ - while (_oldn && atomic_cmpxchg(ptr, _oldn, _oldn + 1) != _oldn) { \ - _oldn = atomic_read(ptr); \ +#define qatomic_fetch_inc_nonzero(ptr) ({ \ + typeof_strip_qual(*ptr) _oldn = qatomic_read(ptr); \ + while (_oldn && qatomic_cmpxchg(ptr, _oldn, _oldn + 1) != _oldn) { \ + _oldn = qatomic_read(ptr); \ } \ _oldn; \ }) /* Abstractions to access atomically (i.e. "once") i64/u64 variables */ #ifdef CONFIG_ATOMIC64 -static inline int64_t atomic_read_i64(const int64_t *ptr) +static inline int64_t qatomic_read_i64(const int64_t *ptr) { /* use __nocheck because sizeof(void *) might be < sizeof(u64) */ - return atomic_read__nocheck(ptr); + return qatomic_read__nocheck(ptr); } -static inline uint64_t atomic_read_u64(const uint64_t *ptr) +static inline uint64_t qatomic_read_u64(const uint64_t *ptr) { - return atomic_read__nocheck(ptr); + return qatomic_read__nocheck(ptr); } -static inline void atomic_set_i64(int64_t *ptr, int64_t val) +static inline void qatomic_set_i64(int64_t *ptr, int64_t val) { - atomic_set__nocheck(ptr, val); + qatomic_set__nocheck(ptr, val); } -static inline void atomic_set_u64(uint64_t *ptr, uint64_t val) +static inline void qatomic_set_u64(uint64_t *ptr, uint64_t val) { - atomic_set__nocheck(ptr, val); + qatomic_set__nocheck(ptr, val); } -static inline void atomic64_init(void) +static inline void qatomic64_init(void) { } #else /* !CONFIG_ATOMIC64 */ -int64_t atomic_read_i64(const int64_t *ptr); -uint64_t atomic_read_u64(const uint64_t *ptr); -void atomic_set_i64(int64_t *ptr, int64_t val); -void atomic_set_u64(uint64_t *ptr, uint64_t val); -void atomic64_init(void); +int64_t qatomic_read_i64(const int64_t *ptr); +uint64_t qatomic_read_u64(const uint64_t *ptr); +void qatomic_set_i64(int64_t *ptr, int64_t val); +void qatomic_set_u64(uint64_t *ptr, uint64_t val); +void qatomic64_init(void); #endif /* !CONFIG_ATOMIC64 */ #endif /* QEMU_ATOMIC_H */ diff --git a/include/qemu/atomic128.h b/include/qemu/atomic128.h index 6b34484e15..ad2bcf45b4 100644 --- a/include/qemu/atomic128.h +++ b/include/qemu/atomic128.h @@ -44,7 +44,7 @@ #if defined(CONFIG_ATOMIC128) static inline Int128 atomic16_cmpxchg(Int128 *ptr, Int128 cmp, Int128 new) { - return atomic_cmpxchg__nocheck(ptr, cmp, new); + return qatomic_cmpxchg__nocheck(ptr, cmp, new); } # define HAVE_CMPXCHG128 1 #elif defined(CONFIG_CMPXCHG128) @@ -89,12 +89,12 @@ Int128 QEMU_ERROR("unsupported atomic") #if defined(CONFIG_ATOMIC128) static inline Int128 atomic16_read(Int128 *ptr) { - return atomic_read__nocheck(ptr); + return qatomic_read__nocheck(ptr); } static inline void atomic16_set(Int128 *ptr, Int128 val) { - atomic_set__nocheck(ptr, val); + qatomic_set__nocheck(ptr, val); } # define HAVE_ATOMIC128 1 diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index f55ce8b320..3acbf3384c 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -51,7 +51,7 @@ static inline void set_bit_atomic(long nr, unsigned long *addr) unsigned long mask = BIT_MASK(nr); unsigned long *p = addr + BIT_WORD(nr); - atomic_or(p, mask); + qatomic_or(p, mask); } /** diff --git a/include/qemu/coroutine.h b/include/qemu/coroutine.h index dfd261c5b1..84eab6e3bf 100644 --- a/include/qemu/coroutine.h +++ b/include/qemu/coroutine.h @@ -179,7 +179,7 @@ static inline coroutine_fn void qemu_co_mutex_assert_locked(CoMutex *mutex) * because the condition will be false no matter whether we read NULL or * the pointer for any other coroutine. */ - assert(atomic_read(&mutex->locked) && + assert(qatomic_read(&mutex->locked) && mutex->holder == qemu_coroutine_self()); } diff --git a/include/qemu/iov.h b/include/qemu/iov.h index bffc151282..b6b283a5e5 100644 --- a/include/qemu/iov.h +++ b/include/qemu/iov.h @@ -130,6 +130,29 @@ size_t iov_discard_front(struct iovec **iov, unsigned int *iov_cnt, size_t iov_discard_back(struct iovec *iov, unsigned int *iov_cnt, size_t bytes); +/* Information needed to undo an iov_discard_*() operation */ +typedef struct { + struct iovec *modified_iov; + struct iovec orig; +} IOVDiscardUndo; + +/* + * Undo an iov_discard_front_undoable() or iov_discard_back_undoable() + * operation. If multiple operations are made then each one needs a separate + * IOVDiscardUndo and iov_discard_undo() must be called in the reverse order + * that the operations were made. + */ +void iov_discard_undo(IOVDiscardUndo *undo); + +/* + * Undoable versions of iov_discard_front() and iov_discard_back(). Use + * iov_discard_undo() to reset to the state before the discard operations. + */ +size_t iov_discard_front_undoable(struct iovec **iov, unsigned int *iov_cnt, + size_t bytes, IOVDiscardUndo *undo); +size_t iov_discard_back_undoable(struct iovec *iov, unsigned int *iov_cnt, + size_t bytes, IOVDiscardUndo *undo); + typedef struct QEMUIOVector { struct iovec *iov; int niov; diff --git a/include/qemu/log.h b/include/qemu/log.h index f4724f7330..9b80660207 100644 --- a/include/qemu/log.h +++ b/include/qemu/log.h @@ -36,7 +36,7 @@ static inline bool qemu_log_separate(void) bool res = false; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile && logfile->fd != stderr) { res = true; } @@ -75,7 +75,7 @@ static inline FILE *qemu_log_lock(void) { QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { qemu_flockfile(logfile->fd); return logfile->fd; @@ -102,7 +102,7 @@ qemu_log_vprintf(const char *fmt, va_list va) QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { vfprintf(logfile->fd, fmt, va); } diff --git a/include/qemu/queue.h b/include/qemu/queue.h index 456a5b01ee..e029e7bf66 100644 --- a/include/qemu/queue.h +++ b/include/qemu/queue.h @@ -218,12 +218,12 @@ struct { \ typeof(elm) save_sle_next; \ do { \ save_sle_next = (elm)->field.sle_next = (head)->slh_first; \ - } while (atomic_cmpxchg(&(head)->slh_first, save_sle_next, (elm)) != \ + } while (qatomic_cmpxchg(&(head)->slh_first, save_sle_next, (elm)) !=\ save_sle_next); \ } while (/*CONSTCOND*/0) #define QSLIST_MOVE_ATOMIC(dest, src) do { \ - (dest)->slh_first = atomic_xchg(&(src)->slh_first, NULL); \ + (dest)->slh_first = qatomic_xchg(&(src)->slh_first, NULL); \ } while (/*CONSTCOND*/0) #define QSLIST_REMOVE_HEAD(head, field) do { \ @@ -376,7 +376,8 @@ struct { \ /* * Simple queue access methods. */ -#define QSIMPLEQ_EMPTY_ATOMIC(head) (atomic_read(&((head)->sqh_first)) == NULL) +#define QSIMPLEQ_EMPTY_ATOMIC(head) \ + (qatomic_read(&((head)->sqh_first)) == NULL) #define QSIMPLEQ_EMPTY(head) ((head)->sqh_first == NULL) #define QSIMPLEQ_FIRST(head) ((head)->sqh_first) #define QSIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next) diff --git a/include/qemu/rcu.h b/include/qemu/rcu.h index 0e375ebe13..515d327cf1 100644 --- a/include/qemu/rcu.h +++ b/include/qemu/rcu.h @@ -79,8 +79,8 @@ static inline void rcu_read_lock(void) return; } - ctr = atomic_read(&rcu_gp_ctr); - atomic_set(&p_rcu_reader->ctr, ctr); + ctr = qatomic_read(&rcu_gp_ctr); + qatomic_set(&p_rcu_reader->ctr, ctr); /* Write p_rcu_reader->ctr before reading RCU-protected pointers. */ smp_mb_placeholder(); @@ -100,12 +100,12 @@ static inline void rcu_read_unlock(void) * smp_mb_placeholder(), this ensures writes to p_rcu_reader->ctr * are sequentially consistent. */ - atomic_store_release(&p_rcu_reader->ctr, 0); + qatomic_store_release(&p_rcu_reader->ctr, 0); /* Write p_rcu_reader->ctr before reading p_rcu_reader->waiting. */ smp_mb_placeholder(); - if (unlikely(atomic_read(&p_rcu_reader->waiting))) { - atomic_set(&p_rcu_reader->waiting, false); + if (unlikely(qatomic_read(&p_rcu_reader->waiting))) { + qatomic_set(&p_rcu_reader->waiting, false); qemu_event_set(&rcu_gp_event); } } diff --git a/include/qemu/rcu_queue.h b/include/qemu/rcu_queue.h index 558961cc27..0e53ddd530 100644 --- a/include/qemu/rcu_queue.h +++ b/include/qemu/rcu_queue.h @@ -36,9 +36,9 @@ extern "C" { /* * List access methods. */ -#define QLIST_EMPTY_RCU(head) (atomic_read(&(head)->lh_first) == NULL) -#define QLIST_FIRST_RCU(head) (atomic_rcu_read(&(head)->lh_first)) -#define QLIST_NEXT_RCU(elm, field) (atomic_rcu_read(&(elm)->field.le_next)) +#define QLIST_EMPTY_RCU(head) (qatomic_read(&(head)->lh_first) == NULL) +#define QLIST_FIRST_RCU(head) (qatomic_rcu_read(&(head)->lh_first)) +#define QLIST_NEXT_RCU(elm, field) (qatomic_rcu_read(&(elm)->field.le_next)) /* * List functions. @@ -46,7 +46,7 @@ extern "C" { /* - * The difference between atomic_read/set and atomic_rcu_read/set + * The difference between qatomic_read/set and qatomic_rcu_read/set * is in the including of a read/write memory barrier to the volatile * access. atomic_rcu_* macros include the memory barrier, the * plain atomic macros do not. Therefore, it should be correct to @@ -66,7 +66,7 @@ extern "C" { #define QLIST_INSERT_AFTER_RCU(listelm, elm, field) do { \ (elm)->field.le_next = (listelm)->field.le_next; \ (elm)->field.le_prev = &(listelm)->field.le_next; \ - atomic_rcu_set(&(listelm)->field.le_next, (elm)); \ + qatomic_rcu_set(&(listelm)->field.le_next, (elm)); \ if ((elm)->field.le_next != NULL) { \ (elm)->field.le_next->field.le_prev = \ &(elm)->field.le_next; \ @@ -82,7 +82,7 @@ extern "C" { #define QLIST_INSERT_BEFORE_RCU(listelm, elm, field) do { \ (elm)->field.le_prev = (listelm)->field.le_prev; \ (elm)->field.le_next = (listelm); \ - atomic_rcu_set((listelm)->field.le_prev, (elm)); \ + qatomic_rcu_set((listelm)->field.le_prev, (elm)); \ (listelm)->field.le_prev = &(elm)->field.le_next; \ } while (/*CONSTCOND*/0) @@ -95,7 +95,7 @@ extern "C" { #define QLIST_INSERT_HEAD_RCU(head, elm, field) do { \ (elm)->field.le_prev = &(head)->lh_first; \ (elm)->field.le_next = (head)->lh_first; \ - atomic_rcu_set((&(head)->lh_first), (elm)); \ + qatomic_rcu_set((&(head)->lh_first), (elm)); \ if ((elm)->field.le_next != NULL) { \ (elm)->field.le_next->field.le_prev = \ &(elm)->field.le_next; \ @@ -112,20 +112,20 @@ extern "C" { (elm)->field.le_next->field.le_prev = \ (elm)->field.le_prev; \ } \ - atomic_set((elm)->field.le_prev, (elm)->field.le_next); \ + qatomic_set((elm)->field.le_prev, (elm)->field.le_next); \ } while (/*CONSTCOND*/0) /* List traversal must occur within an RCU critical section. */ #define QLIST_FOREACH_RCU(var, head, field) \ - for ((var) = atomic_rcu_read(&(head)->lh_first); \ + for ((var) = qatomic_rcu_read(&(head)->lh_first); \ (var); \ - (var) = atomic_rcu_read(&(var)->field.le_next)) + (var) = qatomic_rcu_read(&(var)->field.le_next)) /* List traversal must occur within an RCU critical section. */ #define QLIST_FOREACH_SAFE_RCU(var, head, field, next_var) \ - for ((var) = (atomic_rcu_read(&(head)->lh_first)); \ + for ((var) = (qatomic_rcu_read(&(head)->lh_first)); \ (var) && \ - ((next_var) = atomic_rcu_read(&(var)->field.le_next), 1); \ + ((next_var) = qatomic_rcu_read(&(var)->field.le_next), 1); \ (var) = (next_var)) /* @@ -133,9 +133,10 @@ extern "C" { */ /* Simple queue access methods */ -#define QSIMPLEQ_EMPTY_RCU(head) (atomic_read(&(head)->sqh_first) == NULL) -#define QSIMPLEQ_FIRST_RCU(head) atomic_rcu_read(&(head)->sqh_first) -#define QSIMPLEQ_NEXT_RCU(elm, field) atomic_rcu_read(&(elm)->field.sqe_next) +#define QSIMPLEQ_EMPTY_RCU(head) \ + (qatomic_read(&(head)->sqh_first) == NULL) +#define QSIMPLEQ_FIRST_RCU(head) qatomic_rcu_read(&(head)->sqh_first) +#define QSIMPLEQ_NEXT_RCU(elm, field) qatomic_rcu_read(&(elm)->field.sqe_next) /* Simple queue functions */ #define QSIMPLEQ_INSERT_HEAD_RCU(head, elm, field) do { \ @@ -143,12 +144,12 @@ extern "C" { if ((elm)->field.sqe_next == NULL) { \ (head)->sqh_last = &(elm)->field.sqe_next; \ } \ - atomic_rcu_set(&(head)->sqh_first, (elm)); \ + qatomic_rcu_set(&(head)->sqh_first, (elm)); \ } while (/*CONSTCOND*/0) #define QSIMPLEQ_INSERT_TAIL_RCU(head, elm, field) do { \ (elm)->field.sqe_next = NULL; \ - atomic_rcu_set((head)->sqh_last, (elm)); \ + qatomic_rcu_set((head)->sqh_last, (elm)); \ (head)->sqh_last = &(elm)->field.sqe_next; \ } while (/*CONSTCOND*/0) @@ -157,11 +158,11 @@ extern "C" { if ((elm)->field.sqe_next == NULL) { \ (head)->sqh_last = &(elm)->field.sqe_next; \ } \ - atomic_rcu_set(&(listelm)->field.sqe_next, (elm)); \ + qatomic_rcu_set(&(listelm)->field.sqe_next, (elm)); \ } while (/*CONSTCOND*/0) #define QSIMPLEQ_REMOVE_HEAD_RCU(head, field) do { \ - atomic_set(&(head)->sqh_first, (head)->sqh_first->field.sqe_next); \ + qatomic_set(&(head)->sqh_first, (head)->sqh_first->field.sqe_next);\ if ((head)->sqh_first == NULL) { \ (head)->sqh_last = &(head)->sqh_first; \ } \ @@ -175,7 +176,7 @@ extern "C" { while (curr->field.sqe_next != (elm)) { \ curr = curr->field.sqe_next; \ } \ - atomic_set(&curr->field.sqe_next, \ + qatomic_set(&curr->field.sqe_next, \ curr->field.sqe_next->field.sqe_next); \ if (curr->field.sqe_next == NULL) { \ (head)->sqh_last = &(curr)->field.sqe_next; \ @@ -184,13 +185,13 @@ extern "C" { } while (/*CONSTCOND*/0) #define QSIMPLEQ_FOREACH_RCU(var, head, field) \ - for ((var) = atomic_rcu_read(&(head)->sqh_first); \ + for ((var) = qatomic_rcu_read(&(head)->sqh_first); \ (var); \ - (var) = atomic_rcu_read(&(var)->field.sqe_next)) + (var) = qatomic_rcu_read(&(var)->field.sqe_next)) #define QSIMPLEQ_FOREACH_SAFE_RCU(var, head, field, next) \ - for ((var) = atomic_rcu_read(&(head)->sqh_first); \ - (var) && ((next) = atomic_rcu_read(&(var)->field.sqe_next), 1); \ + for ((var) = qatomic_rcu_read(&(head)->sqh_first); \ + (var) && ((next) = qatomic_rcu_read(&(var)->field.sqe_next), 1);\ (var) = (next)) /* @@ -198,9 +199,9 @@ extern "C" { */ /* Tail queue access methods */ -#define QTAILQ_EMPTY_RCU(head) (atomic_read(&(head)->tqh_first) == NULL) -#define QTAILQ_FIRST_RCU(head) atomic_rcu_read(&(head)->tqh_first) -#define QTAILQ_NEXT_RCU(elm, field) atomic_rcu_read(&(elm)->field.tqe_next) +#define QTAILQ_EMPTY_RCU(head) (qatomic_read(&(head)->tqh_first) == NULL) +#define QTAILQ_FIRST_RCU(head) qatomic_rcu_read(&(head)->tqh_first) +#define QTAILQ_NEXT_RCU(elm, field) qatomic_rcu_read(&(elm)->field.tqe_next) /* Tail queue functions */ #define QTAILQ_INSERT_HEAD_RCU(head, elm, field) do { \ @@ -211,14 +212,14 @@ extern "C" { } else { \ (head)->tqh_circ.tql_prev = &(elm)->field.tqe_circ; \ } \ - atomic_rcu_set(&(head)->tqh_first, (elm)); \ + qatomic_rcu_set(&(head)->tqh_first, (elm)); \ (elm)->field.tqe_circ.tql_prev = &(head)->tqh_circ; \ } while (/*CONSTCOND*/0) #define QTAILQ_INSERT_TAIL_RCU(head, elm, field) do { \ (elm)->field.tqe_next = NULL; \ (elm)->field.tqe_circ.tql_prev = (head)->tqh_circ.tql_prev; \ - atomic_rcu_set(&(head)->tqh_circ.tql_prev->tql_next, (elm)); \ + qatomic_rcu_set(&(head)->tqh_circ.tql_prev->tql_next, (elm)); \ (head)->tqh_circ.tql_prev = &(elm)->field.tqe_circ; \ } while (/*CONSTCOND*/0) @@ -230,14 +231,14 @@ extern "C" { } else { \ (head)->tqh_circ.tql_prev = &(elm)->field.tqe_circ; \ } \ - atomic_rcu_set(&(listelm)->field.tqe_next, (elm)); \ + qatomic_rcu_set(&(listelm)->field.tqe_next, (elm)); \ (elm)->field.tqe_circ.tql_prev = &(listelm)->field.tqe_circ; \ } while (/*CONSTCOND*/0) #define QTAILQ_INSERT_BEFORE_RCU(listelm, elm, field) do { \ (elm)->field.tqe_circ.tql_prev = (listelm)->field.tqe_circ.tql_prev; \ (elm)->field.tqe_next = (listelm); \ - atomic_rcu_set(&(listelm)->field.tqe_circ.tql_prev->tql_next, (elm)); \ + qatomic_rcu_set(&(listelm)->field.tqe_circ.tql_prev->tql_next, (elm));\ (listelm)->field.tqe_circ.tql_prev = &(elm)->field.tqe_circ; \ } while (/*CONSTCOND*/0) @@ -248,18 +249,19 @@ extern "C" { } else { \ (head)->tqh_circ.tql_prev = (elm)->field.tqe_circ.tql_prev; \ } \ - atomic_set(&(elm)->field.tqe_circ.tql_prev->tql_next, (elm)->field.tqe_next); \ + qatomic_set(&(elm)->field.tqe_circ.tql_prev->tql_next, \ + (elm)->field.tqe_next); \ (elm)->field.tqe_circ.tql_prev = NULL; \ } while (/*CONSTCOND*/0) #define QTAILQ_FOREACH_RCU(var, head, field) \ - for ((var) = atomic_rcu_read(&(head)->tqh_first); \ + for ((var) = qatomic_rcu_read(&(head)->tqh_first); \ (var); \ - (var) = atomic_rcu_read(&(var)->field.tqe_next)) + (var) = qatomic_rcu_read(&(var)->field.tqe_next)) #define QTAILQ_FOREACH_SAFE_RCU(var, head, field, next) \ - for ((var) = atomic_rcu_read(&(head)->tqh_first); \ - (var) && ((next) = atomic_rcu_read(&(var)->field.tqe_next), 1); \ + for ((var) = qatomic_rcu_read(&(head)->tqh_first); \ + (var) && ((next) = qatomic_rcu_read(&(var)->field.tqe_next), 1);\ (var) = (next)) /* @@ -267,23 +269,23 @@ extern "C" { */ /* Singly-linked list access methods */ -#define QSLIST_EMPTY_RCU(head) (atomic_read(&(head)->slh_first) == NULL) -#define QSLIST_FIRST_RCU(head) atomic_rcu_read(&(head)->slh_first) -#define QSLIST_NEXT_RCU(elm, field) atomic_rcu_read(&(elm)->field.sle_next) +#define QSLIST_EMPTY_RCU(head) (qatomic_read(&(head)->slh_first) == NULL) +#define QSLIST_FIRST_RCU(head) qatomic_rcu_read(&(head)->slh_first) +#define QSLIST_NEXT_RCU(elm, field) qatomic_rcu_read(&(elm)->field.sle_next) /* Singly-linked list functions */ #define QSLIST_INSERT_HEAD_RCU(head, elm, field) do { \ (elm)->field.sle_next = (head)->slh_first; \ - atomic_rcu_set(&(head)->slh_first, (elm)); \ + qatomic_rcu_set(&(head)->slh_first, (elm)); \ } while (/*CONSTCOND*/0) #define QSLIST_INSERT_AFTER_RCU(head, listelm, elm, field) do { \ (elm)->field.sle_next = (listelm)->field.sle_next; \ - atomic_rcu_set(&(listelm)->field.sle_next, (elm)); \ + qatomic_rcu_set(&(listelm)->field.sle_next, (elm)); \ } while (/*CONSTCOND*/0) #define QSLIST_REMOVE_HEAD_RCU(head, field) do { \ - atomic_set(&(head)->slh_first, (head)->slh_first->field.sle_next); \ + qatomic_set(&(head)->slh_first, (head)->slh_first->field.sle_next);\ } while (/*CONSTCOND*/0) #define QSLIST_REMOVE_RCU(head, elm, type, field) do { \ @@ -294,19 +296,19 @@ extern "C" { while (curr->field.sle_next != (elm)) { \ curr = curr->field.sle_next; \ } \ - atomic_set(&curr->field.sle_next, \ + qatomic_set(&curr->field.sle_next, \ curr->field.sle_next->field.sle_next); \ } \ } while (/*CONSTCOND*/0) #define QSLIST_FOREACH_RCU(var, head, field) \ - for ((var) = atomic_rcu_read(&(head)->slh_first); \ - (var); \ - (var) = atomic_rcu_read(&(var)->field.sle_next)) + for ((var) = qatomic_rcu_read(&(head)->slh_first); \ + (var); \ + (var) = qatomic_rcu_read(&(var)->field.sle_next)) -#define QSLIST_FOREACH_SAFE_RCU(var, head, field, next) \ - for ((var) = atomic_rcu_read(&(head)->slh_first); \ - (var) && ((next) = atomic_rcu_read(&(var)->field.sle_next), 1); \ +#define QSLIST_FOREACH_SAFE_RCU(var, head, field, next) \ + for ((var) = qatomic_rcu_read(&(head)->slh_first); \ + (var) && ((next) = qatomic_rcu_read(&(var)->field.sle_next), 1); \ (var) = (next)) #ifdef __cplusplus diff --git a/include/qemu/seqlock.h b/include/qemu/seqlock.h index 8b6b4ee4bb..ecb7d2c864 100644 --- a/include/qemu/seqlock.h +++ b/include/qemu/seqlock.h @@ -32,7 +32,7 @@ static inline void seqlock_init(QemuSeqLock *sl) /* Lock out other writers and update the count. */ static inline void seqlock_write_begin(QemuSeqLock *sl) { - atomic_set(&sl->sequence, sl->sequence + 1); + qatomic_set(&sl->sequence, sl->sequence + 1); /* Write sequence before updating other fields. */ smp_wmb(); @@ -43,7 +43,7 @@ static inline void seqlock_write_end(QemuSeqLock *sl) /* Write other fields before finalizing sequence. */ smp_wmb(); - atomic_set(&sl->sequence, sl->sequence + 1); + qatomic_set(&sl->sequence, sl->sequence + 1); } /* Lock out other writers and update the count. */ @@ -68,7 +68,7 @@ static inline void seqlock_write_unlock_impl(QemuSeqLock *sl, QemuLockable *lock static inline unsigned seqlock_read_begin(const QemuSeqLock *sl) { /* Always fail if a write is in progress. */ - unsigned ret = atomic_read(&sl->sequence); + unsigned ret = qatomic_read(&sl->sequence); /* Read sequence before reading other fields. */ smp_rmb(); @@ -79,7 +79,7 @@ static inline int seqlock_read_retry(const QemuSeqLock *sl, unsigned start) { /* Read other fields before reading final sequence. */ smp_rmb(); - return unlikely(atomic_read(&sl->sequence) != start); + return unlikely(qatomic_read(&sl->sequence) != start); } #endif diff --git a/include/qemu/stats64.h b/include/qemu/stats64.h index 19a5ac4c56..fdd3d1b8f9 100644 --- a/include/qemu/stats64.h +++ b/include/qemu/stats64.h @@ -37,27 +37,27 @@ static inline void stat64_init(Stat64 *s, uint64_t value) static inline uint64_t stat64_get(const Stat64 *s) { - return atomic_read__nocheck(&s->value); + return qatomic_read__nocheck(&s->value); } static inline void stat64_add(Stat64 *s, uint64_t value) { - atomic_add(&s->value, value); + qatomic_add(&s->value, value); } static inline void stat64_min(Stat64 *s, uint64_t value) { - uint64_t orig = atomic_read__nocheck(&s->value); + uint64_t orig = qatomic_read__nocheck(&s->value); while (orig > value) { - orig = atomic_cmpxchg__nocheck(&s->value, orig, value); + orig = qatomic_cmpxchg__nocheck(&s->value, orig, value); } } static inline void stat64_max(Stat64 *s, uint64_t value) { - uint64_t orig = atomic_read__nocheck(&s->value); + uint64_t orig = qatomic_read__nocheck(&s->value); while (orig < value) { - orig = atomic_cmpxchg__nocheck(&s->value, orig, value); + orig = qatomic_cmpxchg__nocheck(&s->value, orig, value); } } #else @@ -79,7 +79,7 @@ static inline void stat64_add(Stat64 *s, uint64_t value) low = (uint32_t) value; if (!low) { if (high) { - atomic_add(&s->high, high); + qatomic_add(&s->high, high); } return; } @@ -101,7 +101,7 @@ static inline void stat64_add(Stat64 *s, uint64_t value) * the high 32 bits, so it can race just fine with stat64_add32_carry * and even stat64_get! */ - old = atomic_cmpxchg(&s->low, orig, result); + old = qatomic_cmpxchg(&s->low, orig, result); if (orig == old) { return; } @@ -116,7 +116,7 @@ static inline void stat64_min(Stat64 *s, uint64_t value) high = value >> 32; low = (uint32_t) value; do { - orig_high = atomic_read(&s->high); + orig_high = qatomic_read(&s->high); if (orig_high < high) { return; } @@ -128,7 +128,7 @@ static inline void stat64_min(Stat64 *s, uint64_t value) * the write barrier in stat64_min_slow. */ smp_rmb(); - orig_low = atomic_read(&s->low); + orig_low = qatomic_read(&s->low); if (orig_low <= low) { return; } @@ -138,7 +138,7 @@ static inline void stat64_min(Stat64 *s, uint64_t value) * we may miss being lucky. */ smp_rmb(); - orig_high = atomic_read(&s->high); + orig_high = qatomic_read(&s->high); if (orig_high < high) { return; } @@ -156,7 +156,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value) high = value >> 32; low = (uint32_t) value; do { - orig_high = atomic_read(&s->high); + orig_high = qatomic_read(&s->high); if (orig_high > high) { return; } @@ -168,7 +168,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value) * the write barrier in stat64_max_slow. */ smp_rmb(); - orig_low = atomic_read(&s->low); + orig_low = qatomic_read(&s->low); if (orig_low >= low) { return; } @@ -178,7 +178,7 @@ static inline void stat64_max(Stat64 *s, uint64_t value) * we may miss being lucky. */ smp_rmb(); - orig_high = atomic_read(&s->high); + orig_high = qatomic_read(&s->high); if (orig_high > high) { return; } diff --git a/include/qemu/thread.h b/include/qemu/thread.h index 4baf4d1715..5435763184 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -70,33 +70,33 @@ extern QemuCondTimedWaitFunc qemu_cond_timedwait_func; qemu_cond_timedwait_impl(c, m, ms, __FILE__, __LINE__) #else #define qemu_mutex_lock(m) ({ \ - QemuMutexLockFunc _f = atomic_read(&qemu_mutex_lock_func); \ + QemuMutexLockFunc _f = qatomic_read(&qemu_mutex_lock_func); \ _f(m, __FILE__, __LINE__); \ }) -#define qemu_mutex_trylock(m) ({ \ - QemuMutexTrylockFunc _f = atomic_read(&qemu_mutex_trylock_func); \ - _f(m, __FILE__, __LINE__); \ +#define qemu_mutex_trylock(m) ({ \ + QemuMutexTrylockFunc _f = qatomic_read(&qemu_mutex_trylock_func); \ + _f(m, __FILE__, __LINE__); \ }) -#define qemu_rec_mutex_lock(m) ({ \ - QemuRecMutexLockFunc _f = atomic_read(&qemu_rec_mutex_lock_func); \ - _f(m, __FILE__, __LINE__); \ +#define qemu_rec_mutex_lock(m) ({ \ + QemuRecMutexLockFunc _f = qatomic_read(&qemu_rec_mutex_lock_func);\ + _f(m, __FILE__, __LINE__); \ }) #define qemu_rec_mutex_trylock(m) ({ \ QemuRecMutexTrylockFunc _f; \ - _f = atomic_read(&qemu_rec_mutex_trylock_func); \ + _f = qatomic_read(&qemu_rec_mutex_trylock_func); \ _f(m, __FILE__, __LINE__); \ }) #define qemu_cond_wait(c, m) ({ \ - QemuCondWaitFunc _f = atomic_read(&qemu_cond_wait_func); \ + QemuCondWaitFunc _f = qatomic_read(&qemu_cond_wait_func); \ _f(c, m, __FILE__, __LINE__); \ }) #define qemu_cond_timedwait(c, m, ms) ({ \ - QemuCondTimedWaitFunc _f = atomic_read(&qemu_cond_timedwait_func); \ + QemuCondTimedWaitFunc _f = qatomic_read(&qemu_cond_timedwait_func);\ _f(c, m, ms, __FILE__, __LINE__); \ }) #endif @@ -236,7 +236,7 @@ static inline void qemu_spin_lock(QemuSpin *spin) __tsan_mutex_pre_lock(spin, 0); #endif while (unlikely(__sync_lock_test_and_set(&spin->value, true))) { - while (atomic_read(&spin->value)) { + while (qatomic_read(&spin->value)) { cpu_relax(); } } @@ -261,7 +261,7 @@ static inline bool qemu_spin_trylock(QemuSpin *spin) static inline bool qemu_spin_locked(QemuSpin *spin) { - return atomic_read(&spin->value); + return qatomic_read(&spin->value); } static inline void qemu_spin_unlock(QemuSpin *spin) diff --git a/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h b/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h index acd4c8346d..7b4062a1a1 100644 --- a/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h +++ b/include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_ring.h @@ -68,7 +68,7 @@ static inline int pvrdma_idx_valid(uint32_t idx, uint32_t max_elems) static inline int32_t pvrdma_idx(int *var, uint32_t max_elems) { - const unsigned int idx = atomic_read(var); + const unsigned int idx = qatomic_read(var); if (pvrdma_idx_valid(idx, max_elems)) return idx & (max_elems - 1); @@ -77,17 +77,17 @@ static inline int32_t pvrdma_idx(int *var, uint32_t max_elems) static inline void pvrdma_idx_ring_inc(int *var, uint32_t max_elems) { - uint32_t idx = atomic_read(var) + 1; /* Increment. */ + uint32_t idx = qatomic_read(var) + 1; /* Increment. */ idx &= (max_elems << 1) - 1; /* Modulo size, flip gen. */ - atomic_set(var, idx); + qatomic_set(var, idx); } static inline int32_t pvrdma_idx_ring_has_space(const struct pvrdma_ring *r, uint32_t max_elems, uint32_t *out_tail) { - const uint32_t tail = atomic_read(&r->prod_tail); - const uint32_t head = atomic_read(&r->cons_head); + const uint32_t tail = qatomic_read(&r->prod_tail); + const uint32_t head = qatomic_read(&r->cons_head); if (pvrdma_idx_valid(tail, max_elems) && pvrdma_idx_valid(head, max_elems)) { @@ -100,8 +100,8 @@ static inline int32_t pvrdma_idx_ring_has_space(const struct pvrdma_ring *r, static inline int32_t pvrdma_idx_ring_has_data(const struct pvrdma_ring *r, uint32_t max_elems, uint32_t *out_head) { - const uint32_t tail = atomic_read(&r->prod_tail); - const uint32_t head = atomic_read(&r->cons_head); + const uint32_t tail = qatomic_read(&r->prod_tail); + const uint32_t head = qatomic_read(&r->cons_head); if (pvrdma_idx_valid(tail, max_elems) && pvrdma_idx_valid(head, max_elems)) { diff --git a/iothread.c b/iothread.c index 3a3860a09c..69eff9efbc 100644 --- a/iothread.c +++ b/iothread.c @@ -76,7 +76,7 @@ static void *iothread_run(void *opaque) * We must check the running state again in case it was * changed in previous aio_poll() */ - if (iothread->running && atomic_read(&iothread->run_gcontext)) { + if (iothread->running && qatomic_read(&iothread->run_gcontext)) { g_main_loop_run(iothread->main_loop); } } @@ -116,7 +116,7 @@ static void iothread_instance_init(Object *obj) iothread->thread_id = -1; qemu_sem_init(&iothread->init_done_sem, 0); /* By default, we don't run gcontext */ - atomic_set(&iothread->run_gcontext, 0); + qatomic_set(&iothread->run_gcontext, 0); } static void iothread_instance_finalize(Object *obj) @@ -348,7 +348,7 @@ IOThreadInfoList *qmp_query_iothreads(Error **errp) GMainContext *iothread_get_g_main_context(IOThread *iothread) { - atomic_set(&iothread->run_gcontext, 1); + qatomic_set(&iothread->run_gcontext, 1); aio_notify(iothread->ctx); return iothread->worker_context; } diff --git a/linux-user/hppa/cpu_loop.c b/linux-user/hppa/cpu_loop.c index 9915456a1d..d7e1ec7722 100644 --- a/linux-user/hppa/cpu_loop.c +++ b/linux-user/hppa/cpu_loop.c @@ -39,7 +39,7 @@ static abi_ulong hppa_lws(CPUHPPAState *env) } old = tswap32(old); new = tswap32(new); - ret = atomic_cmpxchg((uint32_t *)g2h(addr), old, new); + ret = qatomic_cmpxchg((uint32_t *)g2h(addr), old, new); ret = tswap32(ret); break; @@ -60,19 +60,19 @@ static abi_ulong hppa_lws(CPUHPPAState *env) case 0: old = *(uint8_t *)g2h(old); new = *(uint8_t *)g2h(new); - ret = atomic_cmpxchg((uint8_t *)g2h(addr), old, new); + ret = qatomic_cmpxchg((uint8_t *)g2h(addr), old, new); ret = ret != old; break; case 1: old = *(uint16_t *)g2h(old); new = *(uint16_t *)g2h(new); - ret = atomic_cmpxchg((uint16_t *)g2h(addr), old, new); + ret = qatomic_cmpxchg((uint16_t *)g2h(addr), old, new); ret = ret != old; break; case 2: old = *(uint32_t *)g2h(old); new = *(uint32_t *)g2h(new); - ret = atomic_cmpxchg((uint32_t *)g2h(addr), old, new); + ret = qatomic_cmpxchg((uint32_t *)g2h(addr), old, new); ret = ret != old; break; case 3: @@ -81,7 +81,8 @@ static abi_ulong hppa_lws(CPUHPPAState *env) o64 = *(uint64_t *)g2h(old); n64 = *(uint64_t *)g2h(new); #ifdef CONFIG_ATOMIC64 - r64 = atomic_cmpxchg__nocheck((uint64_t *)g2h(addr), o64, n64); + r64 = qatomic_cmpxchg__nocheck((uint64_t *)g2h(addr), + o64, n64); ret = r64 != o64; #else start_exclusive(); diff --git a/linux-user/qemu.h b/linux-user/qemu.h index a69a0bd347..941ca99722 100644 --- a/linux-user/qemu.h +++ b/linux-user/qemu.h @@ -146,7 +146,7 @@ typedef struct TaskState { /* Nonzero if process_pending_signals() needs to do something (either * handle a pending signal or unblock signals). * This flag is written from a signal handler so should be accessed via - * the atomic_read() and atomic_set() functions. (It is not accessed + * the qatomic_read() and qatomic_set() functions. (It is not accessed * from multiple threads.) */ int signal_pending; diff --git a/linux-user/signal.c b/linux-user/signal.c index 8cf51ffecd..73de934c65 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -195,7 +195,7 @@ int block_signals(void) sigfillset(&set); sigprocmask(SIG_SETMASK, &set, 0); - return atomic_xchg(&ts->signal_pending, 1); + return qatomic_xchg(&ts->signal_pending, 1); } /* Wrapper for sigprocmask function @@ -688,7 +688,7 @@ int queue_signal(CPUArchState *env, int sig, int si_type, ts->sync_signal.info = *info; ts->sync_signal.pending = sig; /* signal that a new signal is pending */ - atomic_set(&ts->signal_pending, 1); + qatomic_set(&ts->signal_pending, 1); return 1; /* indicates that the signal was queued */ } @@ -1005,7 +1005,7 @@ void process_pending_signals(CPUArchState *cpu_env) sigset_t set; sigset_t *blocked_set; - while (atomic_read(&ts->signal_pending)) { + while (qatomic_read(&ts->signal_pending)) { /* FIXME: This is not threadsafe. */ sigfillset(&set); sigprocmask(SIG_SETMASK, &set, 0); @@ -1049,7 +1049,7 @@ void process_pending_signals(CPUArchState *cpu_env) * of unblocking might cause us to take another host signal which * will set signal_pending again). */ - atomic_set(&ts->signal_pending, 0); + qatomic_set(&ts->signal_pending, 0); ts->in_sigsuspend = 0; set = ts->signal_mask; sigdelset(&set, SIGSEGV); diff --git a/migration/colo-failover.c b/migration/colo-failover.c index b717edc8e2..42453481c4 100644 --- a/migration/colo-failover.c +++ b/migration/colo-failover.c @@ -63,7 +63,7 @@ FailoverStatus failover_set_state(FailoverStatus old_state, { FailoverStatus old; - old = atomic_cmpxchg(&failover_state, old_state, new_state); + old = qatomic_cmpxchg(&failover_state, old_state, new_state); if (old == old_state) { trace_colo_failover_set_state(FailoverStatus_str(new_state)); } @@ -72,7 +72,7 @@ FailoverStatus failover_set_state(FailoverStatus old_state, FailoverStatus failover_get_state(void) { - return atomic_read(&failover_state); + return qatomic_read(&failover_state); } void qmp_x_colo_lost_heartbeat(Error **errp) diff --git a/migration/migration.c b/migration/migration.c index 58a5452471..d9d1e0b190 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1595,7 +1595,7 @@ void qmp_migrate_start_postcopy(Error **errp) * we don't error if migration has finished since that would be racy * with issuing this command. */ - atomic_set(&s->start_postcopy, true); + qatomic_set(&s->start_postcopy, true); } /* shared migration helpers */ @@ -1603,7 +1603,7 @@ void qmp_migrate_start_postcopy(Error **errp) void migrate_set_state(int *state, int old_state, int new_state) { assert(new_state < MIGRATION_STATUS__MAX); - if (atomic_cmpxchg(state, old_state, new_state) == old_state) { + if (qatomic_cmpxchg(state, old_state, new_state) == old_state) { trace_migrate_set_state(MigrationStatus_str(new_state)); migrate_generate_event(new_state); } @@ -1954,7 +1954,7 @@ void qmp_migrate_recover(const char *uri, Error **errp) return; } - if (atomic_cmpxchg(&mis->postcopy_recover_triggered, + if (qatomic_cmpxchg(&mis->postcopy_recover_triggered, false, true) == true) { error_setg(errp, "Migrate recovery is triggered already"); return; @@ -3329,7 +3329,7 @@ static MigIterateState migration_iteration_run(MigrationState *s) if (pending_size && pending_size >= s->threshold_size) { /* Still a significant amount to transfer */ if (!in_postcopy && pend_pre <= s->threshold_size && - atomic_read(&s->start_postcopy)) { + qatomic_read(&s->start_postcopy)) { if (postcopy_start(s)) { error_report("%s: postcopy failed to start", __func__); } diff --git a/migration/multifd.c b/migration/multifd.c index ac84a61797..fd57378db8 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -410,7 +410,7 @@ static int multifd_send_pages(QEMUFile *f) MultiFDPages_t *pages = multifd_send_state->pages; uint64_t transferred; - if (atomic_read(&multifd_send_state->exiting)) { + if (qatomic_read(&multifd_send_state->exiting)) { return -1; } @@ -508,7 +508,7 @@ static void multifd_send_terminate_threads(Error *err) * threads at the same time, we can end calling this function * twice. */ - if (atomic_xchg(&multifd_send_state->exiting, 1)) { + if (qatomic_xchg(&multifd_send_state->exiting, 1)) { return; } @@ -632,7 +632,7 @@ static void *multifd_send_thread(void *opaque) while (true) { qemu_sem_wait(&p->sem); - if (atomic_read(&multifd_send_state->exiting)) { + if (qatomic_read(&multifd_send_state->exiting)) { break; } qemu_mutex_lock(&p->mutex); @@ -760,7 +760,7 @@ int multifd_save_setup(Error **errp) multifd_send_state->params = g_new0(MultiFDSendParams, thread_count); multifd_send_state->pages = multifd_pages_init(page_count); qemu_sem_init(&multifd_send_state->channels_ready, 0); - atomic_set(&multifd_send_state->exiting, 0); + qatomic_set(&multifd_send_state->exiting, 0); multifd_send_state->ops = multifd_ops[migrate_multifd_compression()]; for (i = 0; i < thread_count; i++) { @@ -997,7 +997,7 @@ int multifd_load_setup(Error **errp) thread_count = migrate_multifd_channels(); multifd_recv_state = g_malloc0(sizeof(*multifd_recv_state)); multifd_recv_state->params = g_new0(MultiFDRecvParams, thread_count); - atomic_set(&multifd_recv_state->count, 0); + qatomic_set(&multifd_recv_state->count, 0); qemu_sem_init(&multifd_recv_state->sem_sync, 0); multifd_recv_state->ops = multifd_ops[migrate_multifd_compression()]; @@ -1037,7 +1037,7 @@ bool multifd_recv_all_channels_created(void) return true; } - return thread_count == atomic_read(&multifd_recv_state->count); + return thread_count == qatomic_read(&multifd_recv_state->count); } /* @@ -1058,7 +1058,7 @@ bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp) error_propagate_prepend(errp, local_err, "failed to receive packet" " via multifd channel %d: ", - atomic_read(&multifd_recv_state->count)); + qatomic_read(&multifd_recv_state->count)); return false; } trace_multifd_recv_new_channel(id); @@ -1079,7 +1079,7 @@ bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp) p->running = true; qemu_thread_create(&p->thread, p->name, multifd_recv_thread, p, QEMU_THREAD_JOINABLE); - atomic_inc(&multifd_recv_state->count); - return atomic_read(&multifd_recv_state->count) == + qatomic_inc(&multifd_recv_state->count); + return qatomic_read(&multifd_recv_state->count) == migrate_multifd_channels(); } diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index baf094ba3a..1654ff11a5 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -530,7 +530,7 @@ int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis) Error *local_err = NULL; /* Let the fault thread quit */ - atomic_set(&mis->fault_thread_quit, 1); + qatomic_set(&mis->fault_thread_quit, 1); postcopy_fault_thread_notify(mis); trace_postcopy_ram_incoming_cleanup_join(); qemu_thread_join(&mis->fault_thread); @@ -742,12 +742,12 @@ static void mark_postcopy_blocktime_begin(uintptr_t addr, uint32_t ptid, low_time_offset = get_low_time_offset(dc); if (dc->vcpu_addr[cpu] == 0) { - atomic_inc(&dc->smp_cpus_down); + qatomic_inc(&dc->smp_cpus_down); } - atomic_xchg(&dc->last_begin, low_time_offset); - atomic_xchg(&dc->page_fault_vcpu_time[cpu], low_time_offset); - atomic_xchg(&dc->vcpu_addr[cpu], addr); + qatomic_xchg(&dc->last_begin, low_time_offset); + qatomic_xchg(&dc->page_fault_vcpu_time[cpu], low_time_offset); + qatomic_xchg(&dc->vcpu_addr[cpu], addr); /* * check it here, not at the beginning of the function, @@ -756,9 +756,9 @@ static void mark_postcopy_blocktime_begin(uintptr_t addr, uint32_t ptid, */ already_received = ramblock_recv_bitmap_test(rb, (void *)addr); if (already_received) { - atomic_xchg(&dc->vcpu_addr[cpu], 0); - atomic_xchg(&dc->page_fault_vcpu_time[cpu], 0); - atomic_dec(&dc->smp_cpus_down); + qatomic_xchg(&dc->vcpu_addr[cpu], 0); + qatomic_xchg(&dc->page_fault_vcpu_time[cpu], 0); + qatomic_dec(&dc->smp_cpus_down); } trace_mark_postcopy_blocktime_begin(addr, dc, dc->page_fault_vcpu_time[cpu], cpu, already_received); @@ -813,28 +813,28 @@ static void mark_postcopy_blocktime_end(uintptr_t addr) for (i = 0; i < smp_cpus; i++) { uint32_t vcpu_blocktime = 0; - read_vcpu_time = atomic_fetch_add(&dc->page_fault_vcpu_time[i], 0); - if (atomic_fetch_add(&dc->vcpu_addr[i], 0) != addr || + read_vcpu_time = qatomic_fetch_add(&dc->page_fault_vcpu_time[i], 0); + if (qatomic_fetch_add(&dc->vcpu_addr[i], 0) != addr || read_vcpu_time == 0) { continue; } - atomic_xchg(&dc->vcpu_addr[i], 0); + qatomic_xchg(&dc->vcpu_addr[i], 0); vcpu_blocktime = low_time_offset - read_vcpu_time; affected_cpu += 1; /* we need to know is that mark_postcopy_end was due to * faulted page, another possible case it's prefetched * page and in that case we shouldn't be here */ if (!vcpu_total_blocktime && - atomic_fetch_add(&dc->smp_cpus_down, 0) == smp_cpus) { + qatomic_fetch_add(&dc->smp_cpus_down, 0) == smp_cpus) { vcpu_total_blocktime = true; } /* continue cycle, due to one page could affect several vCPUs */ dc->vcpu_blocktime[i] += vcpu_blocktime; } - atomic_sub(&dc->smp_cpus_down, affected_cpu); + qatomic_sub(&dc->smp_cpus_down, affected_cpu); if (vcpu_total_blocktime) { - dc->total_blocktime += low_time_offset - atomic_fetch_add( + dc->total_blocktime += low_time_offset - qatomic_fetch_add( &dc->last_begin, 0); } trace_mark_postcopy_blocktime_end(addr, dc, dc->total_blocktime, @@ -928,7 +928,7 @@ static void *postcopy_ram_fault_thread(void *opaque) error_report("%s: read() failed", __func__); } - if (atomic_read(&mis->fault_thread_quit)) { + if (qatomic_read(&mis->fault_thread_quit)) { trace_postcopy_ram_fault_thread_quit(); break; } @@ -1410,13 +1410,13 @@ static PostcopyState incoming_postcopy_state; PostcopyState postcopy_state_get(void) { - return atomic_mb_read(&incoming_postcopy_state); + return qatomic_mb_read(&incoming_postcopy_state); } /* Set the state and return the old state */ PostcopyState postcopy_state_set(PostcopyState new_state) { - return atomic_xchg(&incoming_postcopy_state, new_state); + return qatomic_xchg(&incoming_postcopy_state, new_state); } /* Register a handler for external shared memory postcopy diff --git a/migration/rdma.c b/migration/rdma.c index 3bd30d46ad..0340841fad 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -2678,7 +2678,7 @@ static ssize_t qio_channel_rdma_writev(QIOChannel *ioc, size_t len = 0; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmaout); + rdma = qatomic_rcu_read(&rioc->rdmaout); if (!rdma) { return -EIO; @@ -2760,7 +2760,7 @@ static ssize_t qio_channel_rdma_readv(QIOChannel *ioc, size_t done = 0; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmain); + rdma = qatomic_rcu_read(&rioc->rdmain); if (!rdma) { return -EIO; @@ -2875,9 +2875,9 @@ qio_channel_rdma_source_prepare(GSource *source, RCU_READ_LOCK_GUARD(); if (rsource->condition == G_IO_IN) { - rdma = atomic_rcu_read(&rsource->rioc->rdmain); + rdma = qatomic_rcu_read(&rsource->rioc->rdmain); } else { - rdma = atomic_rcu_read(&rsource->rioc->rdmaout); + rdma = qatomic_rcu_read(&rsource->rioc->rdmaout); } if (!rdma) { @@ -2902,9 +2902,9 @@ qio_channel_rdma_source_check(GSource *source) RCU_READ_LOCK_GUARD(); if (rsource->condition == G_IO_IN) { - rdma = atomic_rcu_read(&rsource->rioc->rdmain); + rdma = qatomic_rcu_read(&rsource->rioc->rdmain); } else { - rdma = atomic_rcu_read(&rsource->rioc->rdmaout); + rdma = qatomic_rcu_read(&rsource->rioc->rdmaout); } if (!rdma) { @@ -2932,9 +2932,9 @@ qio_channel_rdma_source_dispatch(GSource *source, RCU_READ_LOCK_GUARD(); if (rsource->condition == G_IO_IN) { - rdma = atomic_rcu_read(&rsource->rioc->rdmain); + rdma = qatomic_rcu_read(&rsource->rioc->rdmain); } else { - rdma = atomic_rcu_read(&rsource->rioc->rdmaout); + rdma = qatomic_rcu_read(&rsource->rioc->rdmaout); } if (!rdma) { @@ -3035,12 +3035,12 @@ static int qio_channel_rdma_close(QIOChannel *ioc, rdmain = rioc->rdmain; if (rdmain) { - atomic_rcu_set(&rioc->rdmain, NULL); + qatomic_rcu_set(&rioc->rdmain, NULL); } rdmaout = rioc->rdmaout; if (rdmaout) { - atomic_rcu_set(&rioc->rdmaout, NULL); + qatomic_rcu_set(&rioc->rdmaout, NULL); } rcu->rdmain = rdmain; @@ -3060,8 +3060,8 @@ qio_channel_rdma_shutdown(QIOChannel *ioc, RCU_READ_LOCK_GUARD(); - rdmain = atomic_rcu_read(&rioc->rdmain); - rdmaout = atomic_rcu_read(&rioc->rdmain); + rdmain = qatomic_rcu_read(&rioc->rdmain); + rdmaout = qatomic_rcu_read(&rioc->rdmain); switch (how) { case QIO_CHANNEL_SHUTDOWN_READ: @@ -3131,7 +3131,7 @@ static size_t qemu_rdma_save_page(QEMUFile *f, void *opaque, int ret; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmaout); + rdma = qatomic_rcu_read(&rioc->rdmaout); if (!rdma) { return -EIO; @@ -3451,7 +3451,7 @@ static int qemu_rdma_registration_handle(QEMUFile *f, void *opaque) int i = 0; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmain); + rdma = qatomic_rcu_read(&rioc->rdmain); if (!rdma) { return -EIO; @@ -3714,7 +3714,7 @@ rdma_block_notification_handle(QIOChannelRDMA *rioc, const char *name) int found = -1; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmain); + rdma = qatomic_rcu_read(&rioc->rdmain); if (!rdma) { return -EIO; @@ -3762,7 +3762,7 @@ static int qemu_rdma_registration_start(QEMUFile *f, void *opaque, RDMAContext *rdma; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmaout); + rdma = qatomic_rcu_read(&rioc->rdmaout); if (!rdma) { return -EIO; } @@ -3793,7 +3793,7 @@ static int qemu_rdma_registration_stop(QEMUFile *f, void *opaque, int ret = 0; RCU_READ_LOCK_GUARD(); - rdma = atomic_rcu_read(&rioc->rdmaout); + rdma = qatomic_rcu_read(&rioc->rdmaout); if (!rdma) { return -EIO; } diff --git a/monitor/hmp.c b/monitor/hmp.c index d598dd02bb..4ecdefd705 100644 --- a/monitor/hmp.c +++ b/monitor/hmp.c @@ -1337,19 +1337,19 @@ static void monitor_event(void *opaque, QEMUChrEvent event) monitor_resume(mon); monitor_flush(mon); } else { - atomic_mb_set(&mon->suspend_cnt, 0); + qatomic_mb_set(&mon->suspend_cnt, 0); } break; case CHR_EVENT_MUX_OUT: if (mon->reset_seen) { - if (atomic_mb_read(&mon->suspend_cnt) == 0) { + if (qatomic_mb_read(&mon->suspend_cnt) == 0) { monitor_printf(mon, "\n"); } monitor_flush(mon); monitor_suspend(mon); } else { - atomic_inc(&mon->suspend_cnt); + qatomic_inc(&mon->suspend_cnt); } qemu_mutex_lock(&mon->mon_lock); mon->mux_out = 1; diff --git a/monitor/misc.c b/monitor/misc.c index 0b1b9b196c..262f2bd951 100644 --- a/monitor/misc.c +++ b/monitor/misc.c @@ -751,7 +751,7 @@ static uint64_t vtop(void *ptr, Error **errp) } /* Force copy-on-write if necessary. */ - atomic_add((uint8_t *)ptr, 0); + qatomic_add((uint8_t *)ptr, 0); if (pread(fd, &pinfo, sizeof(pinfo), offset) != sizeof(pinfo)) { error_setg_errno(errp, errno, "Cannot read pagemap"); diff --git a/monitor/monitor.c b/monitor/monitor.c index b385a3d569..0f32892ad4 100644 --- a/monitor/monitor.c +++ b/monitor/monitor.c @@ -449,7 +449,7 @@ int monitor_suspend(Monitor *mon) return -ENOTTY; } - atomic_inc(&mon->suspend_cnt); + qatomic_inc(&mon->suspend_cnt); if (mon->use_io_thread) { /* @@ -476,7 +476,7 @@ void monitor_resume(Monitor *mon) return; } - if (atomic_dec_fetch(&mon->suspend_cnt) == 0) { + if (qatomic_dec_fetch(&mon->suspend_cnt) == 0) { AioContext *ctx; if (mon->use_io_thread) { @@ -501,7 +501,7 @@ int monitor_can_read(void *opaque) { Monitor *mon = opaque; - return !atomic_mb_read(&mon->suspend_cnt); + return !qatomic_mb_read(&mon->suspend_cnt); } void monitor_list_append(Monitor *mon) diff --git a/qemu-nbd.c b/qemu-nbd.c index 33476a1000..e39d3b23c1 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -158,7 +158,7 @@ QEMU_COPYRIGHT "\n" #if HAVE_NBD_DEVICE static void termsig_handler(int signum) { - atomic_cmpxchg(&state, RUNNING, TERMINATE); + qatomic_cmpxchg(&state, RUNNING, TERMINATE); qemu_notify_event(); } #endif /* HAVE_NBD_DEVICE */ diff --git a/qga/commands.c b/qga/commands.c index d3fec807c1..3dcd5fbe5c 100644 --- a/qga/commands.c +++ b/qga/commands.c @@ -166,13 +166,13 @@ GuestExecStatus *qmp_guest_exec_status(int64_t pid, Error **errp) ges = g_new0(GuestExecStatus, 1); - bool finished = atomic_mb_read(&gei->finished); + bool finished = qatomic_mb_read(&gei->finished); /* need to wait till output channels are closed * to be sure we captured all output at this point */ if (gei->has_output) { - finished = finished && atomic_mb_read(&gei->out.closed); - finished = finished && atomic_mb_read(&gei->err.closed); + finished = finished && qatomic_mb_read(&gei->out.closed); + finished = finished && qatomic_mb_read(&gei->err.closed); } ges->exited = finished; @@ -274,7 +274,7 @@ static void guest_exec_child_watch(GPid pid, gint status, gpointer data) (int32_t)gpid_to_int64(pid), (uint32_t)status); gei->status = status; - atomic_mb_set(&gei->finished, true); + qatomic_mb_set(&gei->finished, true); g_spawn_close_pid(pid); } @@ -330,7 +330,7 @@ static gboolean guest_exec_input_watch(GIOChannel *ch, done: g_io_channel_shutdown(ch, true, NULL); g_io_channel_unref(ch); - atomic_mb_set(&p->closed, true); + qatomic_mb_set(&p->closed, true); g_free(p->data); return false; @@ -384,7 +384,7 @@ static gboolean guest_exec_output_watch(GIOChannel *ch, close: g_io_channel_shutdown(ch, true, NULL); g_io_channel_unref(ch); - atomic_mb_set(&p->closed, true); + qatomic_mb_set(&p->closed, true); return false; } diff --git a/qom/object.c b/qom/object.c index a1ab9a7801..c335dce7e4 100644 --- a/qom/object.c +++ b/qom/object.c @@ -867,7 +867,7 @@ Object *object_dynamic_cast_assert(Object *obj, const char *typename, Object *inst; for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) { - if (atomic_read(&obj->class->object_cast_cache[i]) == typename) { + if (qatomic_read(&obj->class->object_cast_cache[i]) == typename) { goto out; } } @@ -884,10 +884,10 @@ Object *object_dynamic_cast_assert(Object *obj, const char *typename, if (obj && obj == inst) { for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { - atomic_set(&obj->class->object_cast_cache[i - 1], - atomic_read(&obj->class->object_cast_cache[i])); + qatomic_set(&obj->class->object_cast_cache[i - 1], + qatomic_read(&obj->class->object_cast_cache[i])); } - atomic_set(&obj->class->object_cast_cache[i - 1], typename); + qatomic_set(&obj->class->object_cast_cache[i - 1], typename); } out: @@ -957,7 +957,7 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, int i; for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { - if (atomic_read(&class->class_cast_cache[i]) == typename) { + if (qatomic_read(&class->class_cast_cache[i]) == typename) { ret = class; goto out; } @@ -978,10 +978,10 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, #ifdef CONFIG_QOM_CAST_DEBUG if (class && ret == class) { for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { - atomic_set(&class->class_cast_cache[i - 1], - atomic_read(&class->class_cast_cache[i])); + qatomic_set(&class->class_cast_cache[i - 1], + qatomic_read(&class->class_cast_cache[i])); } - atomic_set(&class->class_cast_cache[i - 1], typename); + qatomic_set(&class->class_cast_cache[i - 1], typename); } out: #endif @@ -1166,7 +1166,7 @@ Object *object_ref(void *objptr) if (!obj) { return NULL; } - atomic_inc(&obj->ref); + qatomic_inc(&obj->ref); return obj; } @@ -1179,7 +1179,7 @@ void object_unref(void *objptr) g_assert(obj->ref > 0); /* parent always holds a reference to its children */ - if (atomic_fetch_dec(&obj->ref) == 1) { + if (qatomic_fetch_dec(&obj->ref) == 1) { object_finalize(obj); } } diff --git a/scripts/kernel-doc b/scripts/kernel-doc index 030b5c8691..40ad782e34 100755 --- a/scripts/kernel-doc +++ b/scripts/kernel-doc @@ -1625,7 +1625,7 @@ sub dump_function($$) { # If you mess with these regexps, it's a good idea to check that # the following functions' documentation still comes out right: # - parport_register_device (function pointer parameters) - # - atomic_set (macro) + # - qatomic_set (macro) # - pci_match_device, __copy_to_user (long return type) if ($define && $prototype =~ m/^()([a-zA-Z0-9_~:]+)\s+/) { diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c index 57ad830d54..d26faaf91e 100644 --- a/scsi/qemu-pr-helper.c +++ b/scsi/qemu-pr-helper.c @@ -747,7 +747,7 @@ static void coroutine_fn prh_co_entry(void *opaque) goto out; } - while (atomic_read(&state) == RUNNING) { + while (qatomic_read(&state) == RUNNING) { PRHelperRequest req; PRHelperResponse resp; int sz; @@ -816,7 +816,7 @@ static gboolean accept_client(QIOChannel *ioc, GIOCondition cond, gpointer opaqu static void termsig_handler(int signum) { - atomic_cmpxchg(&state, RUNNING, TERMINATE); + qatomic_cmpxchg(&state, RUNNING, TERMINATE); qemu_notify_event(); } diff --git a/softmmu/cpu-throttle.c b/softmmu/cpu-throttle.c index 4e6b2818ca..2ec4b8e0bc 100644 --- a/softmmu/cpu-throttle.c +++ b/softmmu/cpu-throttle.c @@ -64,7 +64,7 @@ static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque) } sleeptime_ns = endtime_ns - qemu_clock_get_ns(QEMU_CLOCK_REALTIME); } - atomic_set(&cpu->throttle_thread_scheduled, 0); + qatomic_set(&cpu->throttle_thread_scheduled, 0); } static void cpu_throttle_timer_tick(void *opaque) @@ -77,7 +77,7 @@ static void cpu_throttle_timer_tick(void *opaque) return; } CPU_FOREACH(cpu) { - if (!atomic_xchg(&cpu->throttle_thread_scheduled, 1)) { + if (!qatomic_xchg(&cpu->throttle_thread_scheduled, 1)) { async_run_on_cpu(cpu, cpu_throttle_thread, RUN_ON_CPU_NULL); } @@ -94,7 +94,7 @@ void cpu_throttle_set(int new_throttle_pct) new_throttle_pct = MIN(new_throttle_pct, CPU_THROTTLE_PCT_MAX); new_throttle_pct = MAX(new_throttle_pct, CPU_THROTTLE_PCT_MIN); - atomic_set(&throttle_percentage, new_throttle_pct); + qatomic_set(&throttle_percentage, new_throttle_pct); timer_mod(throttle_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) + CPU_THROTTLE_TIMESLICE_NS); @@ -102,7 +102,7 @@ void cpu_throttle_set(int new_throttle_pct) void cpu_throttle_stop(void) { - atomic_set(&throttle_percentage, 0); + qatomic_set(&throttle_percentage, 0); } bool cpu_throttle_active(void) @@ -112,7 +112,7 @@ bool cpu_throttle_active(void) int cpu_throttle_get_percentage(void) { - return atomic_read(&throttle_percentage); + return qatomic_read(&throttle_percentage); } void cpu_throttle_init(void) diff --git a/softmmu/cpus.c b/softmmu/cpus.c index e3b98065c9..ac8940d52e 100644 --- a/softmmu/cpus.c +++ b/softmmu/cpus.c @@ -192,7 +192,7 @@ static void cpu_update_icount_locked(CPUState *cpu) int64_t executed = cpu_get_icount_executed(cpu); cpu->icount_budget -= executed; - atomic_set_i64(&timers_state.qemu_icount, + qatomic_set_i64(&timers_state.qemu_icount, timers_state.qemu_icount + executed); } @@ -223,13 +223,13 @@ static int64_t cpu_get_icount_raw_locked(void) cpu_update_icount_locked(cpu); } /* The read is protected by the seqlock, but needs atomic64 to avoid UB */ - return atomic_read_i64(&timers_state.qemu_icount); + return qatomic_read_i64(&timers_state.qemu_icount); } static int64_t cpu_get_icount_locked(void) { int64_t icount = cpu_get_icount_raw_locked(); - return atomic_read_i64(&timers_state.qemu_icount_bias) + + return qatomic_read_i64(&timers_state.qemu_icount_bias) + cpu_icount_to_ns(icount); } @@ -262,7 +262,7 @@ int64_t cpu_get_icount(void) int64_t cpu_icount_to_ns(int64_t icount) { - return icount << atomic_read(&timers_state.icount_time_shift); + return icount << qatomic_read(&timers_state.icount_time_shift); } static int64_t cpu_get_ticks_locked(void) @@ -393,18 +393,18 @@ static void icount_adjust(void) && last_delta + ICOUNT_WOBBLE < delta * 2 && timers_state.icount_time_shift > 0) { /* The guest is getting too far ahead. Slow time down. */ - atomic_set(&timers_state.icount_time_shift, + qatomic_set(&timers_state.icount_time_shift, timers_state.icount_time_shift - 1); } if (delta < 0 && last_delta - ICOUNT_WOBBLE > delta * 2 && timers_state.icount_time_shift < MAX_ICOUNT_SHIFT) { /* The guest is getting too far behind. Speed time up. */ - atomic_set(&timers_state.icount_time_shift, + qatomic_set(&timers_state.icount_time_shift, timers_state.icount_time_shift + 1); } last_delta = delta; - atomic_set_i64(&timers_state.qemu_icount_bias, + qatomic_set_i64(&timers_state.qemu_icount_bias, cur_icount - (timers_state.qemu_icount << timers_state.icount_time_shift)); seqlock_write_unlock(&timers_state.vm_clock_seqlock, @@ -428,7 +428,7 @@ static void icount_adjust_vm(void *opaque) static int64_t qemu_icount_round(int64_t count) { - int shift = atomic_read(&timers_state.icount_time_shift); + int shift = qatomic_read(&timers_state.icount_time_shift); return (count + (1 << shift) - 1) >> shift; } @@ -466,7 +466,7 @@ static void icount_warp_rt(void) int64_t delta = clock - cur_icount; warp_delta = MIN(warp_delta, delta); } - atomic_set_i64(&timers_state.qemu_icount_bias, + qatomic_set_i64(&timers_state.qemu_icount_bias, timers_state.qemu_icount_bias + warp_delta); } timers_state.vm_clock_warp_start = -1; @@ -499,7 +499,7 @@ void qtest_clock_warp(int64_t dest) seqlock_write_lock(&timers_state.vm_clock_seqlock, &timers_state.vm_clock_lock); - atomic_set_i64(&timers_state.qemu_icount_bias, + qatomic_set_i64(&timers_state.qemu_icount_bias, timers_state.qemu_icount_bias + warp); seqlock_write_unlock(&timers_state.vm_clock_seqlock, &timers_state.vm_clock_lock); @@ -583,7 +583,7 @@ void qemu_start_warp_timer(void) */ seqlock_write_lock(&timers_state.vm_clock_seqlock, &timers_state.vm_clock_lock); - atomic_set_i64(&timers_state.qemu_icount_bias, + qatomic_set_i64(&timers_state.qemu_icount_bias, timers_state.qemu_icount_bias + deadline); seqlock_write_unlock(&timers_state.vm_clock_seqlock, &timers_state.vm_clock_lock); @@ -837,11 +837,11 @@ static void qemu_cpu_kick_rr_next_cpu(void) { CPUState *cpu; do { - cpu = atomic_mb_read(&tcg_current_rr_cpu); + cpu = qatomic_mb_read(&tcg_current_rr_cpu); if (cpu) { cpu_exit(cpu); } - } while (cpu != atomic_mb_read(&tcg_current_rr_cpu)); + } while (cpu != qatomic_mb_read(&tcg_current_rr_cpu)); } /* Kick all RR vCPUs */ @@ -1110,7 +1110,7 @@ static void qemu_cpu_stop(CPUState *cpu, bool exit) static void qemu_wait_io_event_common(CPUState *cpu) { - atomic_mb_set(&cpu->thread_kicked, false); + qatomic_mb_set(&cpu->thread_kicked, false); if (cpu->stop) { qemu_cpu_stop(cpu, false); } @@ -1356,7 +1356,7 @@ static int tcg_cpu_exec(CPUState *cpu) ret = cpu_exec(cpu); cpu_exec_end(cpu); #ifdef CONFIG_PROFILER - atomic_set(&tcg_ctx->prof.cpu_exec_time, + qatomic_set(&tcg_ctx->prof.cpu_exec_time, tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti); #endif return ret; @@ -1443,7 +1443,7 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg) while (cpu && cpu_work_list_empty(cpu) && !cpu->exit_request) { - atomic_mb_set(&tcg_current_rr_cpu, cpu); + qatomic_mb_set(&tcg_current_rr_cpu, cpu); current_cpu = cpu; qemu_clock_enable(QEMU_CLOCK_VIRTUAL, @@ -1479,11 +1479,11 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg) cpu = CPU_NEXT(cpu); } /* while (cpu && !cpu->exit_request).. */ - /* Does not need atomic_mb_set because a spurious wakeup is okay. */ - atomic_set(&tcg_current_rr_cpu, NULL); + /* Does not need qatomic_mb_set because a spurious wakeup is okay. */ + qatomic_set(&tcg_current_rr_cpu, NULL); if (cpu && cpu->exit_request) { - atomic_mb_set(&cpu->exit_request, 0); + qatomic_mb_set(&cpu->exit_request, 0); } if (use_icount && all_cpu_threads_idle()) { @@ -1687,7 +1687,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg) } } - atomic_mb_set(&cpu->exit_request, 0); + qatomic_mb_set(&cpu->exit_request, 0); qemu_wait_io_event(cpu); } while (!cpu->unplug || cpu_can_run(cpu)); @@ -1776,7 +1776,7 @@ bool qemu_mutex_iothread_locked(void) */ void qemu_mutex_lock_iothread_impl(const char *file, int line) { - QemuMutexLockFunc bql_lock = atomic_read(&qemu_bql_mutex_lock_func); + QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); g_assert(!qemu_mutex_iothread_locked()); bql_lock(&qemu_global_mutex, file, line); diff --git a/softmmu/memory.c b/softmmu/memory.c index d030eb6f7c..da5f90f141 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -294,12 +294,12 @@ static void flatview_destroy(FlatView *view) static bool flatview_ref(FlatView *view) { - return atomic_fetch_inc_nonzero(&view->ref) > 0; + return qatomic_fetch_inc_nonzero(&view->ref) > 0; } void flatview_unref(FlatView *view) { - if (atomic_fetch_dec(&view->ref) == 1) { + if (qatomic_fetch_dec(&view->ref) == 1) { trace_flatview_destroy_rcu(view, view->root); assert(view->root); call_rcu(view, flatview_destroy, rcu); @@ -1027,7 +1027,7 @@ static void address_space_set_flatview(AddressSpace *as) } /* Writes are protected by the BQL. */ - atomic_rcu_set(&as->current_map, new_view); + qatomic_rcu_set(&as->current_map, new_view); if (old_view) { flatview_unref(old_view); } diff --git a/softmmu/vl.c b/softmmu/vl.c index f7b103467c..50d8c2e42e 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -1320,7 +1320,7 @@ ShutdownCause qemu_reset_requested_get(void) static int qemu_shutdown_requested(void) { - return atomic_xchg(&shutdown_requested, SHUTDOWN_CAUSE_NONE); + return qatomic_xchg(&shutdown_requested, SHUTDOWN_CAUSE_NONE); } static void qemu_kill_report(void) diff --git a/target/arm/mte_helper.c b/target/arm/mte_helper.c index 891306f5b0..5615c6706c 100644 --- a/target/arm/mte_helper.c +++ b/target/arm/mte_helper.c @@ -313,11 +313,11 @@ static void store_tag1(uint64_t ptr, uint8_t *mem, int tag) static void store_tag1_parallel(uint64_t ptr, uint8_t *mem, int tag) { int ofs = extract32(ptr, LOG2_TAG_GRANULE, 1) * 4; - uint8_t old = atomic_read(mem); + uint8_t old = qatomic_read(mem); while (1) { uint8_t new = deposit32(old, ofs, 4, tag); - uint8_t cmp = atomic_cmpxchg(mem, old, new); + uint8_t cmp = qatomic_cmpxchg(mem, old, new); if (likely(cmp == old)) { return; } @@ -398,7 +398,7 @@ static inline void do_st2g(CPUARMState *env, uint64_t ptr, uint64_t xt, 2 * TAG_GRANULE, MMU_DATA_STORE, 1, ra); if (mem1) { tag |= tag << 4; - atomic_set(mem1, tag); + qatomic_set(mem1, tag); } } } diff --git a/target/hppa/op_helper.c b/target/hppa/op_helper.c index 5685e303ab..39361d3759 100644 --- a/target/hppa/op_helper.c +++ b/target/hppa/op_helper.c @@ -67,7 +67,7 @@ static void atomic_store_3(CPUHPPAState *env, target_ulong addr, uint32_t val, old = *haddr; while (1) { new = (old & ~mask) | (val & mask); - cmp = atomic_cmpxchg(haddr, old, new); + cmp = qatomic_cmpxchg(haddr, old, new); if (cmp == old) { return; } diff --git a/target/i386/mem_helper.c b/target/i386/mem_helper.c index acf41f8885..3a6d3ae2ef 100644 --- a/target/i386/mem_helper.c +++ b/target/i386/mem_helper.c @@ -68,7 +68,7 @@ void helper_cmpxchg8b(CPUX86State *env, target_ulong a0) uint64_t *haddr = g2h(a0); cmpv = cpu_to_le64(cmpv); newv = cpu_to_le64(newv); - oldv = atomic_cmpxchg__nocheck(haddr, cmpv, newv); + oldv = qatomic_cmpxchg__nocheck(haddr, cmpv, newv); oldv = le64_to_cpu(oldv); } #else diff --git a/target/i386/whpx-all.c b/target/i386/whpx-all.c index c78baac6df..5a0f337a4c 100644 --- a/target/i386/whpx-all.c +++ b/target/i386/whpx-all.c @@ -946,7 +946,7 @@ static int whpx_vcpu_run(CPUState *cpu) whpx_vcpu_process_async_events(cpu); if (cpu->halted) { cpu->exception_index = EXCP_HLT; - atomic_set(&cpu->exit_request, false); + qatomic_set(&cpu->exit_request, false); return 0; } @@ -961,7 +961,7 @@ static int whpx_vcpu_run(CPUState *cpu) whpx_vcpu_pre_run(cpu); - if (atomic_read(&cpu->exit_request)) { + if (qatomic_read(&cpu->exit_request)) { whpx_vcpu_kick(cpu); } @@ -1113,7 +1113,7 @@ static int whpx_vcpu_run(CPUState *cpu) qemu_mutex_lock_iothread(); current_cpu = cpu; - atomic_set(&cpu->exit_request, false); + qatomic_set(&cpu->exit_request, false); return ret < 0; } diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index f4c4111536..904899054d 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -537,7 +537,7 @@ restart: *pte_pa = pte = updated_pte; #else target_ulong old_pte = - atomic_cmpxchg(pte_pa, pte, updated_pte); + qatomic_cmpxchg(pte_pa, pte, updated_pte); if (old_pte != pte) { goto restart; } else { diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index a237dec757..bd25eed3e8 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -1780,7 +1780,7 @@ static uint32_t do_csst(CPUS390XState *env, uint32_t r3, uint64_t a1, if (parallel) { #ifdef CONFIG_USER_ONLY uint32_t *haddr = g2h(a1); - ov = atomic_cmpxchg__nocheck(haddr, cv, nv); + ov = qatomic_cmpxchg__nocheck(haddr, cv, nv); #else TCGMemOpIdx oi = make_memop_idx(MO_TEUL | MO_ALIGN, mem_idx); ov = helper_atomic_cmpxchgl_be_mmu(env, a1, cv, nv, oi, ra); @@ -1804,7 +1804,7 @@ static uint32_t do_csst(CPUS390XState *env, uint32_t r3, uint64_t a1, #ifdef CONFIG_ATOMIC64 # ifdef CONFIG_USER_ONLY uint64_t *haddr = g2h(a1); - ov = atomic_cmpxchg__nocheck(haddr, cv, nv); + ov = qatomic_cmpxchg__nocheck(haddr, cv, nv); # else TCGMemOpIdx oi = make_memop_idx(MO_TEQ | MO_ALIGN, mem_idx); ov = helper_atomic_cmpxchgq_be_mmu(env, a1, cv, nv, oi, ra); diff --git a/target/xtensa/exc_helper.c b/target/xtensa/exc_helper.c index 58a64e6d62..2f032bc053 100644 --- a/target/xtensa/exc_helper.c +++ b/target/xtensa/exc_helper.c @@ -128,13 +128,13 @@ void HELPER(check_interrupts)(CPUXtensaState *env) void HELPER(intset)(CPUXtensaState *env, uint32_t v) { - atomic_or(&env->sregs[INTSET], + qatomic_or(&env->sregs[INTSET], v & env->config->inttype_mask[INTTYPE_SOFTWARE]); } static void intclear(CPUXtensaState *env, uint32_t v) { - atomic_and(&env->sregs[INTSET], ~v); + qatomic_and(&env->sregs[INTSET], ~v); } void HELPER(intclear)(CPUXtensaState *env, uint32_t v) diff --git a/target/xtensa/op_helper.c b/target/xtensa/op_helper.c index 09f4962d00..143476849f 100644 --- a/target/xtensa/op_helper.c +++ b/target/xtensa/op_helper.c @@ -62,7 +62,7 @@ void HELPER(update_ccompare)(CPUXtensaState *env, uint32_t i) { uint64_t dcc; - atomic_and(&env->sregs[INTSET], + qatomic_and(&env->sregs[INTSET], ~(1u << env->config->timerint[i])); HELPER(update_ccount)(env); dcc = (uint64_t)(env->sregs[CCOMPARE + i] - env->sregs[CCOUNT] - 1) + 1; diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc index 948c35d825..2607fe4ab9 100644 --- a/tcg/aarch64/tcg-target.c.inc +++ b/tcg/aarch64/tcg-target.c.inc @@ -1365,7 +1365,7 @@ void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, i2 = I3401_ADDI | rt << 31 | (addr & 0xfff) << 10 | rd << 5 | rd; } pair = (uint64_t)i2 << 32 | i1; - atomic_set((uint64_t *)jmp_addr, pair); + qatomic_set((uint64_t *)jmp_addr, pair); flush_icache_range(jmp_addr, jmp_addr + 8); } diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h index 99ac1e3958..d2baf796b0 100644 --- a/tcg/i386/tcg-target.h +++ b/tcg/i386/tcg-target.h @@ -215,7 +215,7 @@ static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, uintptr_t addr) { /* patch the branch destination */ - atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); + qatomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); /* no need to flush icache explicitly */ } diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc index bd5b8e09a0..7aa2073520 100644 --- a/tcg/mips/tcg-target.c.inc +++ b/tcg/mips/tcg-target.c.inc @@ -2662,7 +2662,7 @@ static void tcg_target_init(TCGContext *s) void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, uintptr_t addr) { - atomic_set((uint32_t *)jmp_addr, deposit32(OPC_J, 0, 26, addr >> 2)); + qatomic_set((uint32_t *)jmp_addr, deposit32(OPC_J, 0, 26, addr >> 2)); flush_icache_range(jmp_addr, jmp_addr + 4); } diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc index 393c4b30e0..7cb40b0466 100644 --- a/tcg/ppc/tcg-target.c.inc +++ b/tcg/ppc/tcg-target.c.inc @@ -1756,13 +1756,13 @@ void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, #endif /* As per the enclosing if, this is ppc64. Avoid the _Static_assert - within atomic_set that would fail to build a ppc32 host. */ - atomic_set__nocheck((uint64_t *)jmp_addr, pair); + within qatomic_set that would fail to build a ppc32 host. */ + qatomic_set__nocheck((uint64_t *)jmp_addr, pair); flush_icache_range(jmp_addr, jmp_addr + 8); } else { intptr_t diff = addr - jmp_addr; tcg_debug_assert(in_range_b(diff)); - atomic_set((uint32_t *)jmp_addr, B | (diff & 0x3fffffc)); + qatomic_set((uint32_t *)jmp_addr, B | (diff & 0x3fffffc)); flush_icache_range(jmp_addr, jmp_addr + 4); } } diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h index 07accabbd1..63c8797bd3 100644 --- a/tcg/s390/tcg-target.h +++ b/tcg/s390/tcg-target.h @@ -154,7 +154,7 @@ static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, { /* patch the branch destination */ intptr_t disp = addr - (jmp_addr - 2); - atomic_set((int32_t *)jmp_addr, disp / 2); + qatomic_set((int32_t *)jmp_addr, disp / 2); /* no need to flush icache explicitly */ } diff --git a/tcg/sparc/tcg-target.c.inc b/tcg/sparc/tcg-target.c.inc index 0f1d91fc21..40bc12290c 100644 --- a/tcg/sparc/tcg-target.c.inc +++ b/tcg/sparc/tcg-target.c.inc @@ -1839,7 +1839,8 @@ void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, tcg_debug_assert(br_disp == (int32_t)br_disp); if (!USE_REG_TB) { - atomic_set((uint32_t *)jmp_addr, deposit32(CALL, 0, 30, br_disp >> 2)); + qatomic_set((uint32_t *)jmp_addr, + deposit32(CALL, 0, 30, br_disp >> 2)); flush_icache_range(jmp_addr, jmp_addr + 4); return; } @@ -1863,6 +1864,6 @@ void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, | INSN_IMM13((tb_disp & 0x3ff) | -0x400)); } - atomic_set((uint64_t *)jmp_addr, deposit64(i2, 32, 32, i1)); + qatomic_set((uint64_t *)jmp_addr, deposit64(i2, 32, 32, i1)); flush_icache_range(jmp_addr, jmp_addr + 8); } @@ -597,7 +597,7 @@ static inline bool tcg_region_initial_alloc__locked(TCGContext *s) /* Call from a safe-work context */ void tcg_region_reset_all(void) { - unsigned int n_ctxs = atomic_read(&n_tcg_ctxs); + unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs); unsigned int i; qemu_mutex_lock(®ion.lock); @@ -605,7 +605,7 @@ void tcg_region_reset_all(void) region.agg_size_full = 0; for (i = 0; i < n_ctxs; i++) { - TCGContext *s = atomic_read(&tcg_ctxs[i]); + TCGContext *s = qatomic_read(&tcg_ctxs[i]); bool err = tcg_region_initial_alloc__locked(s); g_assert(!err); @@ -794,9 +794,9 @@ void tcg_register_thread(void) } /* Claim an entry in tcg_ctxs */ - n = atomic_fetch_inc(&n_tcg_ctxs); + n = qatomic_fetch_inc(&n_tcg_ctxs); g_assert(n < ms->smp.max_cpus); - atomic_set(&tcg_ctxs[n], s); + qatomic_set(&tcg_ctxs[n], s); if (n > 0) { alloc_tcg_plugin_context(s); @@ -819,17 +819,17 @@ void tcg_register_thread(void) */ size_t tcg_code_size(void) { - unsigned int n_ctxs = atomic_read(&n_tcg_ctxs); + unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs); unsigned int i; size_t total; qemu_mutex_lock(®ion.lock); total = region.agg_size_full; for (i = 0; i < n_ctxs; i++) { - const TCGContext *s = atomic_read(&tcg_ctxs[i]); + const TCGContext *s = qatomic_read(&tcg_ctxs[i]); size_t size; - size = atomic_read(&s->code_gen_ptr) - s->code_gen_buffer; + size = qatomic_read(&s->code_gen_ptr) - s->code_gen_buffer; g_assert(size <= s->code_gen_buffer_size); total += size; } @@ -855,14 +855,14 @@ size_t tcg_code_capacity(void) size_t tcg_tb_phys_invalidate_count(void) { - unsigned int n_ctxs = atomic_read(&n_tcg_ctxs); + unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs); unsigned int i; size_t total = 0; for (i = 0; i < n_ctxs; i++) { - const TCGContext *s = atomic_read(&tcg_ctxs[i]); + const TCGContext *s = qatomic_read(&tcg_ctxs[i]); - total += atomic_read(&s->tb_phys_invalidate_count); + total += qatomic_read(&s->tb_phys_invalidate_count); } return total; } @@ -1041,7 +1041,7 @@ TranslationBlock *tcg_tb_alloc(TCGContext *s) } goto retry; } - atomic_set(&s->code_gen_ptr, next); + qatomic_set(&s->code_gen_ptr, next); s->data_gen_ptr = NULL; return tb; } @@ -2134,7 +2134,7 @@ static void tcg_dump_ops(TCGContext *s, bool have_prefs) QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { for (; col < 40; ++col) { putc(' ', logfile->fd); @@ -2341,7 +2341,7 @@ void tcg_op_remove(TCGContext *s, TCGOp *op) s->nb_ops--; #ifdef CONFIG_PROFILER - atomic_set(&s->prof.del_op_count, s->prof.del_op_count + 1); + qatomic_set(&s->prof.del_op_count, s->prof.del_op_count + 1); #endif } @@ -3964,12 +3964,12 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op) /* avoid copy/paste errors */ #define PROF_ADD(to, from, field) \ do { \ - (to)->field += atomic_read(&((from)->field)); \ + (to)->field += qatomic_read(&((from)->field)); \ } while (0) #define PROF_MAX(to, from, field) \ do { \ - typeof((from)->field) val__ = atomic_read(&((from)->field)); \ + typeof((from)->field) val__ = qatomic_read(&((from)->field)); \ if (val__ > (to)->field) { \ (to)->field = val__; \ } \ @@ -3979,11 +3979,11 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op) static inline void tcg_profile_snapshot(TCGProfile *prof, bool counters, bool table) { - unsigned int n_ctxs = atomic_read(&n_tcg_ctxs); + unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs); unsigned int i; for (i = 0; i < n_ctxs; i++) { - TCGContext *s = atomic_read(&tcg_ctxs[i]); + TCGContext *s = qatomic_read(&tcg_ctxs[i]); const TCGProfile *orig = &s->prof; if (counters) { @@ -4042,15 +4042,15 @@ void tcg_dump_op_count(void) int64_t tcg_cpu_exec_time(void) { - unsigned int n_ctxs = atomic_read(&n_tcg_ctxs); + unsigned int n_ctxs = qatomic_read(&n_tcg_ctxs); unsigned int i; int64_t ret = 0; for (i = 0; i < n_ctxs; i++) { - const TCGContext *s = atomic_read(&tcg_ctxs[i]); + const TCGContext *s = qatomic_read(&tcg_ctxs[i]); const TCGProfile *prof = &s->prof; - ret += atomic_read(&prof->cpu_exec_time); + ret += qatomic_read(&prof->cpu_exec_time); } return ret; } @@ -4083,15 +4083,15 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb) QTAILQ_FOREACH(op, &s->ops, link) { n++; } - atomic_set(&prof->op_count, prof->op_count + n); + qatomic_set(&prof->op_count, prof->op_count + n); if (n > prof->op_count_max) { - atomic_set(&prof->op_count_max, n); + qatomic_set(&prof->op_count_max, n); } n = s->nb_temps; - atomic_set(&prof->temp_count, prof->temp_count + n); + qatomic_set(&prof->temp_count, prof->temp_count + n); if (n > prof->temp_count_max) { - atomic_set(&prof->temp_count_max, n); + qatomic_set(&prof->temp_count_max, n); } } #endif @@ -4125,7 +4125,7 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb) #endif #ifdef CONFIG_PROFILER - atomic_set(&prof->opt_time, prof->opt_time - profile_getclock()); + qatomic_set(&prof->opt_time, prof->opt_time - profile_getclock()); #endif #ifdef USE_TCG_OPTIMIZATIONS @@ -4133,8 +4133,8 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb) #endif #ifdef CONFIG_PROFILER - atomic_set(&prof->opt_time, prof->opt_time + profile_getclock()); - atomic_set(&prof->la_time, prof->la_time - profile_getclock()); + qatomic_set(&prof->opt_time, prof->opt_time + profile_getclock()); + qatomic_set(&prof->la_time, prof->la_time - profile_getclock()); #endif reachable_code_pass(s); @@ -4159,7 +4159,7 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb) } #ifdef CONFIG_PROFILER - atomic_set(&prof->la_time, prof->la_time + profile_getclock()); + qatomic_set(&prof->la_time, prof->la_time + profile_getclock()); #endif #ifdef DEBUG_DISAS @@ -4190,7 +4190,7 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb) TCGOpcode opc = op->opc; #ifdef CONFIG_PROFILER - atomic_set(&prof->table_op_count[opc], prof->table_op_count[opc] + 1); + qatomic_set(&prof->table_op_count[opc], prof->table_op_count[opc] + 1); #endif switch (opc) { @@ -1115,7 +1115,7 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr) case INDEX_op_goto_tb: /* Jump address is aligned */ tb_ptr = QEMU_ALIGN_PTR_UP(tb_ptr, 4); - t0 = atomic_read((int32_t *)tb_ptr); + t0 = qatomic_read((int32_t *)tb_ptr); tb_ptr += sizeof(int32_t); tci_assert(tb_ptr == old_code_ptr + op_size); tb_ptr += (int32_t)t0; diff --git a/tcg/tci/tcg-target.h b/tcg/tci/tcg-target.h index 8b90ab71cb..8c1c1d265d 100644 --- a/tcg/tci/tcg-target.h +++ b/tcg/tci/tcg-target.h @@ -206,7 +206,7 @@ static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, uintptr_t addr) { /* patch the branch destination */ - atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); + qatomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); /* no need to flush icache explicitly */ } diff --git a/tests/atomic64-bench.c b/tests/atomic64-bench.c index 121a8c14f4..e474753d34 100644 --- a/tests/atomic64-bench.c +++ b/tests/atomic64-bench.c @@ -56,17 +56,17 @@ static void *thread_func(void *arg) { struct thread_info *info = arg; - atomic_inc(&n_ready_threads); - while (!atomic_read(&test_start)) { + qatomic_inc(&n_ready_threads); + while (!qatomic_read(&test_start)) { cpu_relax(); } - while (!atomic_read(&test_stop)) { + while (!qatomic_read(&test_stop)) { unsigned int index; info->r = xorshift64star(info->r); index = info->r & (range - 1); - atomic_read_i64(&counts[index].i64); + qatomic_read_i64(&counts[index].i64); info->accesses++; } return NULL; @@ -76,13 +76,13 @@ static void run_test(void) { unsigned int i; - while (atomic_read(&n_ready_threads) != n_threads) { + while (qatomic_read(&n_ready_threads) != n_threads) { cpu_relax(); } - atomic_set(&test_start, true); + qatomic_set(&test_start, true); g_usleep(duration * G_USEC_PER_SEC); - atomic_set(&test_stop, true); + qatomic_set(&test_stop, true); for (i = 0; i < n_threads; i++) { qemu_thread_join(&threads[i]); diff --git a/tests/atomic_add-bench.c b/tests/atomic_add-bench.c index 5666f6bbff..f05471ab45 100644 --- a/tests/atomic_add-bench.c +++ b/tests/atomic_add-bench.c @@ -53,12 +53,12 @@ static void *thread_func(void *arg) { struct thread_info *info = arg; - atomic_inc(&n_ready_threads); - while (!atomic_read(&test_start)) { + qatomic_inc(&n_ready_threads); + while (!qatomic_read(&test_start)) { cpu_relax(); } - while (!atomic_read(&test_stop)) { + while (!qatomic_read(&test_stop)) { unsigned int index; info->r = xorshift64star(info->r); @@ -68,7 +68,7 @@ static void *thread_func(void *arg) counts[index].val += 1; qemu_mutex_unlock(&counts[index].lock); } else { - atomic_inc(&counts[index].val); + qatomic_inc(&counts[index].val); } } return NULL; @@ -78,13 +78,13 @@ static void run_test(void) { unsigned int i; - while (atomic_read(&n_ready_threads) != n_threads) { + while (qatomic_read(&n_ready_threads) != n_threads) { cpu_relax(); } - atomic_set(&test_start, true); + qatomic_set(&test_start, true); g_usleep(duration * G_USEC_PER_SEC); - atomic_set(&test_stop, true); + qatomic_set(&test_stop, true); for (i = 0; i < n_threads; i++) { qemu_thread_join(&threads[i]); diff --git a/tests/iothread.c b/tests/iothread.c index d3a2ee9a01..afde12b4ef 100644 --- a/tests/iothread.c +++ b/tests/iothread.c @@ -74,7 +74,7 @@ static void *iothread_run(void *opaque) qemu_cond_signal(&iothread->init_done_cond); qemu_mutex_unlock(&iothread->init_done_lock); - while (!atomic_read(&iothread->stopping)) { + while (!qatomic_read(&iothread->stopping)) { aio_poll(iothread->ctx, true); } diff --git a/tests/meson.build b/tests/meson.build index 8c3e930687..04072a64ca 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -170,6 +170,9 @@ if have_block if 'CONFIG_NETTLE' in config_host or 'CONFIG_GCRYPT' in config_host tests += {'test-crypto-pbkdf': [io]} endif + if 'CONFIG_EPOLL_CREATE1' in config_host + tests += {'test-fdmon-epoll': [testblock]} + endif benchs += { 'benchmark-crypto-hash': [crypto], 'benchmark-crypto-hmac': [crypto], diff --git a/tests/qht-bench.c b/tests/qht-bench.c index 362f03cb03..2e5b70ccd0 100644 --- a/tests/qht-bench.c +++ b/tests/qht-bench.c @@ -209,13 +209,13 @@ static void *thread_func(void *p) rcu_register_thread(); - atomic_inc(&n_ready_threads); - while (!atomic_read(&test_start)) { + qatomic_inc(&n_ready_threads); + while (!qatomic_read(&test_start)) { cpu_relax(); } rcu_read_lock(); - while (!atomic_read(&test_stop)) { + while (!qatomic_read(&test_stop)) { info->seed = xorshift64star(info->seed); info->func(info); } @@ -423,13 +423,13 @@ static void run_test(void) { int i; - while (atomic_read(&n_ready_threads) != n_rw_threads + n_rz_threads) { + while (qatomic_read(&n_ready_threads) != n_rw_threads + n_rz_threads) { cpu_relax(); } - atomic_set(&test_start, true); + qatomic_set(&test_start, true); g_usleep(duration * G_USEC_PER_SEC); - atomic_set(&test_stop, true); + qatomic_set(&test_stop, true); for (i = 0; i < n_rw_threads; i++) { qemu_thread_join(&rw_threads[i]); diff --git a/tests/rcutorture.c b/tests/rcutorture.c index 732f03abda..de6f649058 100644 --- a/tests/rcutorture.c +++ b/tests/rcutorture.c @@ -123,7 +123,7 @@ static void *rcu_read_perf_test(void *arg) rcu_register_thread(); *(struct rcu_reader_data **)arg = &rcu_reader; - atomic_inc(&nthreadsrunning); + qatomic_inc(&nthreadsrunning); while (goflag == GOFLAG_INIT) { g_usleep(1000); } @@ -149,7 +149,7 @@ static void *rcu_update_perf_test(void *arg) rcu_register_thread(); *(struct rcu_reader_data **)arg = &rcu_reader; - atomic_inc(&nthreadsrunning); + qatomic_inc(&nthreadsrunning); while (goflag == GOFLAG_INIT) { g_usleep(1000); } @@ -172,7 +172,7 @@ static void perftestinit(void) static void perftestrun(int nthreads, int duration, int nreaders, int nupdaters) { - while (atomic_read(&nthreadsrunning) < nthreads) { + while (qatomic_read(&nthreadsrunning) < nthreads) { g_usleep(1000); } goflag = GOFLAG_RUN; @@ -259,8 +259,8 @@ static void *rcu_read_stress_test(void *arg) } while (goflag == GOFLAG_RUN) { rcu_read_lock(); - p = atomic_rcu_read(&rcu_stress_current); - if (atomic_read(&p->mbtest) == 0) { + p = qatomic_rcu_read(&rcu_stress_current); + if (qatomic_read(&p->mbtest) == 0) { n_mberror++; } rcu_read_lock(); @@ -268,7 +268,7 @@ static void *rcu_read_stress_test(void *arg) garbage++; } rcu_read_unlock(); - pc = atomic_read(&p->age); + pc = qatomic_read(&p->age); rcu_read_unlock(); if ((pc > RCU_STRESS_PIPE_LEN) || (pc < 0)) { pc = RCU_STRESS_PIPE_LEN; @@ -301,7 +301,7 @@ static void *rcu_read_stress_test(void *arg) static void *rcu_update_stress_test(void *arg) { int i, rcu_stress_idx = 0; - struct rcu_stress *cp = atomic_read(&rcu_stress_current); + struct rcu_stress *cp = qatomic_read(&rcu_stress_current); rcu_register_thread(); *(struct rcu_reader_data **)arg = &rcu_reader; @@ -319,11 +319,11 @@ static void *rcu_update_stress_test(void *arg) p = &rcu_stress_array[rcu_stress_idx]; /* catching up with ourselves would be a bug */ assert(p != cp); - atomic_set(&p->mbtest, 0); + qatomic_set(&p->mbtest, 0); smp_mb(); - atomic_set(&p->age, 0); - atomic_set(&p->mbtest, 1); - atomic_rcu_set(&rcu_stress_current, p); + qatomic_set(&p->age, 0); + qatomic_set(&p->mbtest, 1); + qatomic_rcu_set(&rcu_stress_current, p); cp = p; /* * New RCU structure is now live, update pipe counts on old @@ -331,7 +331,7 @@ static void *rcu_update_stress_test(void *arg) */ for (i = 0; i < RCU_STRESS_PIPE_LEN; i++) { if (i != rcu_stress_idx) { - atomic_set(&rcu_stress_array[i].age, + qatomic_set(&rcu_stress_array[i].age, rcu_stress_array[i].age + 1); } } diff --git a/tests/test-aio-multithread.c b/tests/test-aio-multithread.c index d3144be7e0..a555cc8835 100644 --- a/tests/test-aio-multithread.c +++ b/tests/test-aio-multithread.c @@ -118,16 +118,16 @@ static bool schedule_next(int n) { Coroutine *co; - co = atomic_xchg(&to_schedule[n], NULL); + co = qatomic_xchg(&to_schedule[n], NULL); if (!co) { - atomic_inc(&count_retry); + qatomic_inc(&count_retry); return false; } if (n == id) { - atomic_inc(&count_here); + qatomic_inc(&count_here); } else { - atomic_inc(&count_other); + qatomic_inc(&count_other); } aio_co_schedule(ctx[n], co); @@ -143,13 +143,13 @@ static coroutine_fn void test_multi_co_schedule_entry(void *opaque) { g_assert(to_schedule[id] == NULL); - while (!atomic_mb_read(&now_stopping)) { + while (!qatomic_mb_read(&now_stopping)) { int n; n = g_test_rand_int_range(0, NUM_CONTEXTS); schedule_next(n); - atomic_mb_set(&to_schedule[id], qemu_coroutine_self()); + qatomic_mb_set(&to_schedule[id], qemu_coroutine_self()); qemu_coroutine_yield(); g_assert(to_schedule[id] == NULL); } @@ -171,7 +171,7 @@ static void test_multi_co_schedule(int seconds) g_usleep(seconds * 1000000); - atomic_mb_set(&now_stopping, true); + qatomic_mb_set(&now_stopping, true); for (i = 0; i < NUM_CONTEXTS; i++) { ctx_run(i, finish_cb, NULL); to_schedule[i] = NULL; @@ -202,7 +202,7 @@ static CoMutex comutex; static void coroutine_fn test_multi_co_mutex_entry(void *opaque) { - while (!atomic_mb_read(&now_stopping)) { + while (!qatomic_mb_read(&now_stopping)) { qemu_co_mutex_lock(&comutex); counter++; qemu_co_mutex_unlock(&comutex); @@ -212,9 +212,9 @@ static void coroutine_fn test_multi_co_mutex_entry(void *opaque) * exits before the coroutine is woken up, causing a spurious * assertion failure. */ - atomic_inc(&atomic_counter); + qatomic_inc(&atomic_counter); } - atomic_dec(&running); + qatomic_dec(&running); } static void test_multi_co_mutex(int threads, int seconds) @@ -236,7 +236,7 @@ static void test_multi_co_mutex(int threads, int seconds) g_usleep(seconds * 1000000); - atomic_mb_set(&now_stopping, true); + qatomic_mb_set(&now_stopping, true); while (running > 0) { g_usleep(100000); } @@ -296,9 +296,9 @@ static void mcs_mutex_lock(void) nodes[id].next = -1; nodes[id].locked = 1; - prev = atomic_xchg(&mutex_head, id); + prev = qatomic_xchg(&mutex_head, id); if (prev != -1) { - atomic_set(&nodes[prev].next, id); + qatomic_set(&nodes[prev].next, id); qemu_futex_wait(&nodes[id].locked, 1); } } @@ -306,13 +306,13 @@ static void mcs_mutex_lock(void) static void mcs_mutex_unlock(void) { int next; - if (atomic_read(&nodes[id].next) == -1) { - if (atomic_read(&mutex_head) == id && - atomic_cmpxchg(&mutex_head, id, -1) == id) { + if (qatomic_read(&nodes[id].next) == -1) { + if (qatomic_read(&mutex_head) == id && + qatomic_cmpxchg(&mutex_head, id, -1) == id) { /* Last item in the list, exit. */ return; } - while (atomic_read(&nodes[id].next) == -1) { + while (qatomic_read(&nodes[id].next) == -1) { /* mcs_mutex_lock did the xchg, but has not updated * nodes[prev].next yet. */ @@ -320,20 +320,20 @@ static void mcs_mutex_unlock(void) } /* Wake up the next in line. */ - next = atomic_read(&nodes[id].next); + next = qatomic_read(&nodes[id].next); nodes[next].locked = 0; qemu_futex_wake(&nodes[next].locked, 1); } static void test_multi_fair_mutex_entry(void *opaque) { - while (!atomic_mb_read(&now_stopping)) { + while (!qatomic_mb_read(&now_stopping)) { mcs_mutex_lock(); counter++; mcs_mutex_unlock(); - atomic_inc(&atomic_counter); + qatomic_inc(&atomic_counter); } - atomic_dec(&running); + qatomic_dec(&running); } static void test_multi_fair_mutex(int threads, int seconds) @@ -355,7 +355,7 @@ static void test_multi_fair_mutex(int threads, int seconds) g_usleep(seconds * 1000000); - atomic_mb_set(&now_stopping, true); + qatomic_mb_set(&now_stopping, true); while (running > 0) { g_usleep(100000); } @@ -383,13 +383,13 @@ static QemuMutex mutex; static void test_multi_mutex_entry(void *opaque) { - while (!atomic_mb_read(&now_stopping)) { + while (!qatomic_mb_read(&now_stopping)) { qemu_mutex_lock(&mutex); counter++; qemu_mutex_unlock(&mutex); - atomic_inc(&atomic_counter); + qatomic_inc(&atomic_counter); } - atomic_dec(&running); + qatomic_dec(&running); } static void test_multi_mutex(int threads, int seconds) @@ -411,7 +411,7 @@ static void test_multi_mutex(int threads, int seconds) g_usleep(seconds * 1000000); - atomic_mb_set(&now_stopping, true); + qatomic_mb_set(&now_stopping, true); while (running > 0) { g_usleep(100000); } diff --git a/tests/test-fdmon-epoll.c b/tests/test-fdmon-epoll.c new file mode 100644 index 0000000000..11fd8a2fa9 --- /dev/null +++ b/tests/test-fdmon-epoll.c @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * fdmon-epoll tests + * + * Copyright (c) 2020 Red Hat, Inc. + */ + +#include "qemu/osdep.h" +#include "block/aio.h" +#include "qapi/error.h" +#include "qemu/main-loop.h" + +static AioContext *ctx; + +static void dummy_fd_handler(EventNotifier *notifier) +{ + event_notifier_test_and_clear(notifier); +} + +static void add_event_notifiers(EventNotifier *notifiers, size_t n) +{ + for (size_t i = 0; i < n; i++) { + event_notifier_init(¬ifiers[i], false); + aio_set_event_notifier(ctx, ¬ifiers[i], false, + dummy_fd_handler, NULL); + } +} + +static void remove_event_notifiers(EventNotifier *notifiers, size_t n) +{ + for (size_t i = 0; i < n; i++) { + aio_set_event_notifier(ctx, ¬ifiers[i], false, NULL, NULL); + event_notifier_cleanup(¬ifiers[i]); + } +} + +/* Check that fd handlers work when external clients are disabled */ +static void test_external_disabled(void) +{ + EventNotifier notifiers[100]; + + /* fdmon-epoll is only enabled when many fd handlers are registered */ + add_event_notifiers(notifiers, G_N_ELEMENTS(notifiers)); + + event_notifier_set(¬ifiers[0]); + assert(aio_poll(ctx, true)); + + aio_disable_external(ctx); + event_notifier_set(¬ifiers[0]); + assert(aio_poll(ctx, true)); + aio_enable_external(ctx); + + remove_event_notifiers(notifiers, G_N_ELEMENTS(notifiers)); +} + +int main(int argc, char **argv) +{ + /* + * This code relies on the fact that fdmon-io_uring disables itself when + * the glib main loop is in use. The main loop uses fdmon-poll and upgrades + * to fdmon-epoll when the number of fds exceeds a threshold. + */ + qemu_init_main_loop(&error_fatal); + ctx = qemu_get_aio_context(); + + while (g_main_context_iteration(NULL, false)) { + /* Do nothing */ + } + + g_test_init(&argc, &argv, NULL); + g_test_add_func("/fdmon-epoll/external-disabled", test_external_disabled); + return g_test_run(); +} diff --git a/tests/test-iov.c b/tests/test-iov.c index 458ca25099..9c415e2f1f 100644 --- a/tests/test-iov.c +++ b/tests/test-iov.c @@ -26,6 +26,12 @@ static void iov_free(struct iovec *iov, unsigned niov) g_free(iov); } +static bool iov_equals(const struct iovec *a, const struct iovec *b, + unsigned niov) +{ + return memcmp(a, b, sizeof(a[0]) * niov) == 0; +} + static void test_iov_bytes(struct iovec *iov, unsigned niov, size_t offset, size_t bytes) { @@ -335,6 +341,87 @@ static void test_discard_front(void) iov_free(iov, iov_cnt); } +static void test_discard_front_undo(void) +{ + IOVDiscardUndo undo; + struct iovec *iov; + struct iovec *iov_tmp; + struct iovec *iov_orig; + unsigned int iov_cnt; + unsigned int iov_cnt_tmp; + size_t size; + + /* Discard zero bytes */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, 0, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard more bytes than vector size */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size + 1, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard entire vector */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard within first element */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + size = g_test_rand_int_range(1, iov->iov_len); + iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard entire first element */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, iov->iov_len, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard within second element */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_tmp = iov; + iov_cnt_tmp = iov_cnt; + size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len); + iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); +} + static void test_discard_back(void) { struct iovec *iov; @@ -404,6 +491,82 @@ static void test_discard_back(void) iov_free(iov, iov_cnt); } +static void test_discard_back_undo(void) +{ + IOVDiscardUndo undo; + struct iovec *iov; + struct iovec *iov_orig; + unsigned int iov_cnt; + unsigned int iov_cnt_tmp; + size_t size; + + /* Discard zero bytes */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_cnt_tmp = iov_cnt; + iov_discard_back_undoable(iov, &iov_cnt_tmp, 0, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard more bytes than vector size */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + iov_discard_back_undoable(iov, &iov_cnt_tmp, size + 1, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard entire vector */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_cnt_tmp = iov_cnt; + size = iov_size(iov, iov_cnt); + iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard within last element */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_cnt_tmp = iov_cnt; + size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len); + iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard entire last element */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_cnt_tmp = iov_cnt; + size = iov[iov_cnt - 1].iov_len; + iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); + + /* Discard within second-to-last element */ + iov_random(&iov, &iov_cnt); + iov_orig = g_memdup(iov, sizeof(iov[0]) * iov_cnt); + iov_cnt_tmp = iov_cnt; + size = iov[iov_cnt - 1].iov_len + + g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len); + iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); + iov_discard_undo(&undo); + assert(iov_equals(iov, iov_orig, iov_cnt)); + g_free(iov_orig); + iov_free(iov, iov_cnt); +} + int main(int argc, char **argv) { g_test_init(&argc, &argv, NULL); @@ -412,5 +575,7 @@ int main(int argc, char **argv) g_test_add_func("/basic/iov/io", test_io); g_test_add_func("/basic/iov/discard-front", test_discard_front); g_test_add_func("/basic/iov/discard-back", test_discard_back); + g_test_add_func("/basic/iov/discard-front-undo", test_discard_front_undo); + g_test_add_func("/basic/iov/discard-back-undo", test_discard_back_undo); return g_test_run(); } diff --git a/tests/test-logging.c b/tests/test-logging.c index 8b1522cfed..ccb819f193 100644 --- a/tests/test-logging.c +++ b/tests/test-logging.c @@ -133,7 +133,7 @@ static void test_logfile_write(gconstpointer data) */ qemu_set_log_filename(file_path, &error_abort); rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); orig_fd = logfile->fd; g_assert(logfile && logfile->fd); fprintf(logfile->fd, "%s 1st write to file\n", __func__); @@ -141,7 +141,7 @@ static void test_logfile_write(gconstpointer data) /* Change the logfile and ensure that the handle is still valid. */ qemu_set_log_filename(file_path1, &error_abort); - logfile2 = atomic_rcu_read(&qemu_logfile); + logfile2 = qatomic_rcu_read(&qemu_logfile); g_assert(logfile->fd == orig_fd); g_assert(logfile2->fd != logfile->fd); fprintf(logfile->fd, "%s 2nd write to file\n", __func__); diff --git a/tests/test-rcu-list.c b/tests/test-rcu-list.c index 92be51ec50..49641e1936 100644 --- a/tests/test-rcu-list.c +++ b/tests/test-rcu-list.c @@ -106,7 +106,7 @@ static void reclaim_list_el(struct rcu_head *prcu) struct list_element *el = container_of(prcu, struct list_element, rcu); g_free(el); /* Accessed only from call_rcu thread. */ - atomic_set_i64(&n_reclaims, n_reclaims + 1); + qatomic_set_i64(&n_reclaims, n_reclaims + 1); } #if TEST_LIST_TYPE == 1 @@ -172,16 +172,16 @@ static void *rcu_q_reader(void *arg) rcu_register_thread(); *(struct rcu_reader_data **)arg = &rcu_reader; - atomic_inc(&nthreadsrunning); - while (atomic_read(&goflag) == GOFLAG_INIT) { + qatomic_inc(&nthreadsrunning); + while (qatomic_read(&goflag) == GOFLAG_INIT) { g_usleep(1000); } - while (atomic_read(&goflag) == GOFLAG_RUN) { + while (qatomic_read(&goflag) == GOFLAG_RUN) { rcu_read_lock(); TEST_LIST_FOREACH_RCU(el, &Q_list_head, entry) { n_reads_local++; - if (atomic_read(&goflag) == GOFLAG_STOP) { + if (qatomic_read(&goflag) == GOFLAG_STOP) { break; } } @@ -207,12 +207,12 @@ static void *rcu_q_updater(void *arg) struct list_element *el, *prev_el; *(struct rcu_reader_data **)arg = &rcu_reader; - atomic_inc(&nthreadsrunning); - while (atomic_read(&goflag) == GOFLAG_INIT) { + qatomic_inc(&nthreadsrunning); + while (qatomic_read(&goflag) == GOFLAG_INIT) { g_usleep(1000); } - while (atomic_read(&goflag) == GOFLAG_RUN) { + while (qatomic_read(&goflag) == GOFLAG_RUN) { target_el = select_random_el(RCU_Q_LEN); j = 0; /* FOREACH_RCU could work here but let's use both macros */ @@ -226,7 +226,7 @@ static void *rcu_q_updater(void *arg) break; } } - if (atomic_read(&goflag) == GOFLAG_STOP) { + if (qatomic_read(&goflag) == GOFLAG_STOP) { break; } target_el = select_random_el(RCU_Q_LEN); @@ -248,7 +248,7 @@ static void *rcu_q_updater(void *arg) qemu_mutex_lock(&counts_mutex); n_nodes += n_nodes_local; n_updates += n_updates_local; - atomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local); + qatomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local); qemu_mutex_unlock(&counts_mutex); return NULL; } @@ -271,13 +271,13 @@ static void rcu_qtest_init(void) static void rcu_qtest_run(int duration, int nreaders) { int nthreads = nreaders + 1; - while (atomic_read(&nthreadsrunning) < nthreads) { + while (qatomic_read(&nthreadsrunning) < nthreads) { g_usleep(1000); } - atomic_set(&goflag, GOFLAG_RUN); + qatomic_set(&goflag, GOFLAG_RUN); sleep(duration); - atomic_set(&goflag, GOFLAG_STOP); + qatomic_set(&goflag, GOFLAG_STOP); wait_all_threads(); } @@ -302,21 +302,23 @@ static void rcu_qtest(const char *test, int duration, int nreaders) n_removed_local++; } qemu_mutex_lock(&counts_mutex); - atomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local); + qatomic_set_i64(&n_nodes_removed, n_nodes_removed + n_removed_local); qemu_mutex_unlock(&counts_mutex); synchronize_rcu(); - while (atomic_read_i64(&n_nodes_removed) > atomic_read_i64(&n_reclaims)) { + while (qatomic_read_i64(&n_nodes_removed) > + qatomic_read_i64(&n_reclaims)) { g_usleep(100); synchronize_rcu(); } if (g_test_in_charge) { - g_assert_cmpint(atomic_read_i64(&n_nodes_removed), ==, - atomic_read_i64(&n_reclaims)); + g_assert_cmpint(qatomic_read_i64(&n_nodes_removed), ==, + qatomic_read_i64(&n_reclaims)); } else { printf("%s: %d readers; 1 updater; nodes read: " \ "%lld, nodes removed: %"PRIi64"; nodes reclaimed: %"PRIi64"\n", test, nthreadsrunning - 1, n_reads, - atomic_read_i64(&n_nodes_removed), atomic_read_i64(&n_reclaims)); + qatomic_read_i64(&n_nodes_removed), + qatomic_read_i64(&n_reclaims)); exit(0); } } diff --git a/tests/test-thread-pool.c b/tests/test-thread-pool.c index 0b675923f6..70dc6314a1 100644 --- a/tests/test-thread-pool.c +++ b/tests/test-thread-pool.c @@ -21,15 +21,15 @@ typedef struct { static int worker_cb(void *opaque) { WorkerTestData *data = opaque; - return atomic_fetch_inc(&data->n); + return qatomic_fetch_inc(&data->n); } static int long_cb(void *opaque) { WorkerTestData *data = opaque; - if (atomic_cmpxchg(&data->n, 0, 1) == 0) { + if (qatomic_cmpxchg(&data->n, 0, 1) == 0) { g_usleep(2000000); - atomic_or(&data->n, 2); + qatomic_or(&data->n, 2); } return 0; } @@ -172,7 +172,7 @@ static void do_test_cancel(bool sync) /* Cancel the jobs that haven't been started yet. */ num_canceled = 0; for (i = 0; i < 100; i++) { - if (atomic_cmpxchg(&data[i].n, 0, 4) == 0) { + if (qatomic_cmpxchg(&data[i].n, 0, 4) == 0) { data[i].ret = -ECANCELED; if (sync) { bdrv_aio_cancel(data[i].aiocb); @@ -186,7 +186,7 @@ static void do_test_cancel(bool sync) g_assert_cmpint(num_canceled, <, 100); for (i = 0; i < 100; i++) { - if (data[i].aiocb && atomic_read(&data[i].n) < 4) { + if (data[i].aiocb && qatomic_read(&data[i].n) < 4) { if (sync) { /* Canceling the others will be a blocking operation. */ bdrv_aio_cancel(data[i].aiocb); diff --git a/util/aio-posix.c b/util/aio-posix.c index f7f13ebfc2..280f27bb99 100644 --- a/util/aio-posix.c +++ b/util/aio-posix.c @@ -27,7 +27,7 @@ bool aio_poll_disabled(AioContext *ctx) { - return atomic_read(&ctx->poll_disable_cnt); + return qatomic_read(&ctx->poll_disable_cnt); } void aio_add_ready_handler(AioHandlerList *ready_list, @@ -148,8 +148,8 @@ void aio_set_fd_handler(AioContext *ctx, * Changing handlers is a rare event, and a little wasted polling until * the aio_notify below is not an issue. */ - atomic_set(&ctx->poll_disable_cnt, - atomic_read(&ctx->poll_disable_cnt) + poll_disable_change); + qatomic_set(&ctx->poll_disable_cnt, + qatomic_read(&ctx->poll_disable_cnt) + poll_disable_change); ctx->fdmon_ops->update(ctx, node, new_node); if (node) { @@ -581,7 +581,7 @@ bool aio_poll(AioContext *ctx, bool blocking) */ use_notify_me = timeout != 0; if (use_notify_me) { - atomic_set(&ctx->notify_me, atomic_read(&ctx->notify_me) + 2); + qatomic_set(&ctx->notify_me, qatomic_read(&ctx->notify_me) + 2); /* * Write ctx->notify_me before reading ctx->notified. Pairs with * smp_mb in aio_notify(). @@ -589,7 +589,7 @@ bool aio_poll(AioContext *ctx, bool blocking) smp_mb(); /* Don't block if aio_notify() was called */ - if (atomic_read(&ctx->notified)) { + if (qatomic_read(&ctx->notified)) { timeout = 0; } } @@ -603,8 +603,8 @@ bool aio_poll(AioContext *ctx, bool blocking) if (use_notify_me) { /* Finish the poll before clearing the flag. */ - atomic_store_release(&ctx->notify_me, - atomic_read(&ctx->notify_me) - 2); + qatomic_store_release(&ctx->notify_me, + qatomic_read(&ctx->notify_me) - 2); } aio_notify_accept(ctx); diff --git a/util/aio-wait.c b/util/aio-wait.c index b4877493f8..bdb3d3af22 100644 --- a/util/aio-wait.c +++ b/util/aio-wait.c @@ -36,7 +36,7 @@ static void dummy_bh_cb(void *opaque) void aio_wait_kick(void) { /* The barrier (or an atomic op) is in the caller. */ - if (atomic_read(&global_aio_wait.num_waiters)) { + if (qatomic_read(&global_aio_wait.num_waiters)) { aio_bh_schedule_oneshot(qemu_get_aio_context(), dummy_bh_cb, NULL); } } diff --git a/util/aio-win32.c b/util/aio-win32.c index 49bd90e62e..e7b1d649e9 100644 --- a/util/aio-win32.c +++ b/util/aio-win32.c @@ -345,7 +345,7 @@ bool aio_poll(AioContext *ctx, bool blocking) * so disable the optimization now. */ if (blocking) { - atomic_set(&ctx->notify_me, atomic_read(&ctx->notify_me) + 2); + qatomic_set(&ctx->notify_me, qatomic_read(&ctx->notify_me) + 2); /* * Write ctx->notify_me before computing the timeout * (reading bottom half flags, etc.). Pairs with @@ -384,7 +384,8 @@ bool aio_poll(AioContext *ctx, bool blocking) ret = WaitForMultipleObjects(count, events, FALSE, timeout); if (blocking) { assert(first); - atomic_store_release(&ctx->notify_me, atomic_read(&ctx->notify_me) - 2); + qatomic_store_release(&ctx->notify_me, + qatomic_read(&ctx->notify_me) - 2); aio_notify_accept(ctx); } diff --git a/util/async.c b/util/async.c index 4266745dee..f758354c6a 100644 --- a/util/async.c +++ b/util/async.c @@ -70,13 +70,13 @@ static void aio_bh_enqueue(QEMUBH *bh, unsigned new_flags) unsigned old_flags; /* - * The memory barrier implicit in atomic_fetch_or makes sure that: + * The memory barrier implicit in qatomic_fetch_or makes sure that: * 1. idle & any writes needed by the callback are done before the * locations are read in the aio_bh_poll. * 2. ctx is loaded before the callback has a chance to execute and bh * could be freed. */ - old_flags = atomic_fetch_or(&bh->flags, BH_PENDING | new_flags); + old_flags = qatomic_fetch_or(&bh->flags, BH_PENDING | new_flags); if (!(old_flags & BH_PENDING)) { QSLIST_INSERT_HEAD_ATOMIC(&ctx->bh_list, bh, next); } @@ -96,13 +96,13 @@ static QEMUBH *aio_bh_dequeue(BHList *head, unsigned *flags) QSLIST_REMOVE_HEAD(head, next); /* - * The atomic_and is paired with aio_bh_enqueue(). The implicit memory + * The qatomic_and is paired with aio_bh_enqueue(). The implicit memory * barrier ensures that the callback sees all writes done by the scheduling * thread. It also ensures that the scheduling thread sees the cleared * flag before bh->cb has run, and thus will call aio_notify again if * necessary. */ - *flags = atomic_fetch_and(&bh->flags, + *flags = qatomic_fetch_and(&bh->flags, ~(BH_PENDING | BH_SCHEDULED | BH_IDLE)); return bh; } @@ -185,7 +185,7 @@ void qemu_bh_schedule(QEMUBH *bh) */ void qemu_bh_cancel(QEMUBH *bh) { - atomic_and(&bh->flags, ~BH_SCHEDULED); + qatomic_and(&bh->flags, ~BH_SCHEDULED); } /* This func is async.The bottom half will do the delete action at the finial @@ -249,7 +249,7 @@ aio_ctx_prepare(GSource *source, gint *timeout) { AioContext *ctx = (AioContext *) source; - atomic_set(&ctx->notify_me, atomic_read(&ctx->notify_me) | 1); + qatomic_set(&ctx->notify_me, qatomic_read(&ctx->notify_me) | 1); /* * Write ctx->notify_me before computing the timeout @@ -276,7 +276,7 @@ aio_ctx_check(GSource *source) BHListSlice *s; /* Finish computing the timeout before clearing the flag. */ - atomic_store_release(&ctx->notify_me, atomic_read(&ctx->notify_me) & ~1); + qatomic_store_release(&ctx->notify_me, qatomic_read(&ctx->notify_me) & ~1); aio_notify_accept(ctx); QSLIST_FOREACH_RCU(bh, &ctx->bh_list, next) { @@ -424,21 +424,21 @@ void aio_notify(AioContext *ctx) * aio_notify_accept. */ smp_wmb(); - atomic_set(&ctx->notified, true); + qatomic_set(&ctx->notified, true); /* * Write ctx->notified before reading ctx->notify_me. Pairs * with smp_mb in aio_ctx_prepare or aio_poll. */ smp_mb(); - if (atomic_read(&ctx->notify_me)) { + if (qatomic_read(&ctx->notify_me)) { event_notifier_set(&ctx->notifier); } } void aio_notify_accept(AioContext *ctx) { - atomic_set(&ctx->notified, false); + qatomic_set(&ctx->notified, false); /* * Write ctx->notified before reading e.g. bh->flags. Pairs with smp_wmb @@ -465,7 +465,7 @@ static bool aio_context_notifier_poll(void *opaque) EventNotifier *e = opaque; AioContext *ctx = container_of(e, AioContext, notifier); - return atomic_read(&ctx->notified); + return qatomic_read(&ctx->notified); } static void co_schedule_bh_cb(void *opaque) @@ -489,7 +489,7 @@ static void co_schedule_bh_cb(void *opaque) aio_context_acquire(ctx); /* Protected by write barrier in qemu_aio_coroutine_enter */ - atomic_set(&co->scheduled, NULL); + qatomic_set(&co->scheduled, NULL); qemu_aio_coroutine_enter(ctx, co); aio_context_release(ctx); } @@ -546,7 +546,7 @@ fail: void aio_co_schedule(AioContext *ctx, Coroutine *co) { trace_aio_co_schedule(ctx, co); - const char *scheduled = atomic_cmpxchg(&co->scheduled, NULL, + const char *scheduled = qatomic_cmpxchg(&co->scheduled, NULL, __func__); if (scheduled) { @@ -577,7 +577,7 @@ void aio_co_wake(struct Coroutine *co) * qemu_coroutine_enter. */ smp_read_barrier_depends(); - ctx = atomic_read(&co->ctx); + ctx = qatomic_read(&co->ctx); aio_co_enter(ctx, co); } diff --git a/util/atomic64.c b/util/atomic64.c index b198a6c9c8..93037d5b11 100644 --- a/util/atomic64.c +++ b/util/atomic64.c @@ -51,8 +51,8 @@ static QemuSpin *addr_to_lock(const void *addr) return ret; \ } -GEN_READ(atomic_read_i64, int64_t) -GEN_READ(atomic_read_u64, uint64_t) +GEN_READ(qatomic_read_i64, int64_t) +GEN_READ(qatomic_read_u64, uint64_t) #undef GEN_READ #define GEN_SET(name, type) \ @@ -65,11 +65,11 @@ GEN_READ(atomic_read_u64, uint64_t) qemu_spin_unlock(lock); \ } -GEN_SET(atomic_set_i64, int64_t) -GEN_SET(atomic_set_u64, uint64_t) +GEN_SET(qatomic_set_i64, int64_t) +GEN_SET(qatomic_set_u64, uint64_t) #undef GEN_SET -void atomic64_init(void) +void qatomic64_init(void) { int i; diff --git a/util/bitmap.c b/util/bitmap.c index 1753ff7f5b..1f201393ae 100644 --- a/util/bitmap.c +++ b/util/bitmap.c @@ -190,7 +190,7 @@ void bitmap_set_atomic(unsigned long *map, long start, long nr) /* First word */ if (nr - bits_to_set > 0) { - atomic_or(p, mask_to_set); + qatomic_or(p, mask_to_set); nr -= bits_to_set; bits_to_set = BITS_PER_LONG; mask_to_set = ~0UL; @@ -209,9 +209,9 @@ void bitmap_set_atomic(unsigned long *map, long start, long nr) /* Last word */ if (nr) { mask_to_set &= BITMAP_LAST_WORD_MASK(size); - atomic_or(p, mask_to_set); + qatomic_or(p, mask_to_set); } else { - /* If we avoided the full barrier in atomic_or(), issue a + /* If we avoided the full barrier in qatomic_or(), issue a * barrier to account for the assignments in the while loop. */ smp_mb(); @@ -253,7 +253,7 @@ bool bitmap_test_and_clear_atomic(unsigned long *map, long start, long nr) /* First word */ if (nr - bits_to_clear > 0) { - old_bits = atomic_fetch_and(p, ~mask_to_clear); + old_bits = qatomic_fetch_and(p, ~mask_to_clear); dirty |= old_bits & mask_to_clear; nr -= bits_to_clear; bits_to_clear = BITS_PER_LONG; @@ -265,7 +265,7 @@ bool bitmap_test_and_clear_atomic(unsigned long *map, long start, long nr) if (bits_to_clear == BITS_PER_LONG) { while (nr >= BITS_PER_LONG) { if (*p) { - old_bits = atomic_xchg(p, 0); + old_bits = qatomic_xchg(p, 0); dirty |= old_bits; } nr -= BITS_PER_LONG; @@ -276,7 +276,7 @@ bool bitmap_test_and_clear_atomic(unsigned long *map, long start, long nr) /* Last word */ if (nr) { mask_to_clear &= BITMAP_LAST_WORD_MASK(size); - old_bits = atomic_fetch_and(p, ~mask_to_clear); + old_bits = qatomic_fetch_and(p, ~mask_to_clear); dirty |= old_bits & mask_to_clear; } else { if (!dirty) { @@ -291,7 +291,7 @@ void bitmap_copy_and_clear_atomic(unsigned long *dst, unsigned long *src, long nr) { while (nr > 0) { - *dst = atomic_xchg(src, 0); + *dst = qatomic_xchg(src, 0); dst++; src++; nr -= BITS_PER_LONG; diff --git a/util/cacheinfo.c b/util/cacheinfo.c index d94dc6adc8..7804c186b6 100644 --- a/util/cacheinfo.c +++ b/util/cacheinfo.c @@ -193,5 +193,5 @@ static void __attribute__((constructor)) init_cache_info(void) qemu_dcache_linesize = dsize; qemu_dcache_linesize_log = ctz32(dsize); - atomic64_init(); + qatomic64_init(); } diff --git a/util/fdmon-epoll.c b/util/fdmon-epoll.c index fcd989d47d..e11a8a022e 100644 --- a/util/fdmon-epoll.c +++ b/util/fdmon-epoll.c @@ -65,7 +65,7 @@ static int fdmon_epoll_wait(AioContext *ctx, AioHandlerList *ready_list, struct epoll_event events[128]; /* Fall back while external clients are disabled */ - if (atomic_read(&ctx->external_disable_cnt)) { + if (qatomic_read(&ctx->external_disable_cnt)) { return fdmon_poll_ops.wait(ctx, ready_list, timeout); } @@ -132,7 +132,7 @@ bool fdmon_epoll_try_upgrade(AioContext *ctx, unsigned npfd) } /* Do not upgrade while external clients are disabled */ - if (atomic_read(&ctx->external_disable_cnt)) { + if (qatomic_read(&ctx->external_disable_cnt)) { return false; } diff --git a/util/fdmon-io_uring.c b/util/fdmon-io_uring.c index 1d14177df0..1461dfa407 100644 --- a/util/fdmon-io_uring.c +++ b/util/fdmon-io_uring.c @@ -103,7 +103,7 @@ static void enqueue(AioHandlerSList *head, AioHandler *node, unsigned flags) { unsigned old_flags; - old_flags = atomic_fetch_or(&node->flags, FDMON_IO_URING_PENDING | flags); + old_flags = qatomic_fetch_or(&node->flags, FDMON_IO_URING_PENDING | flags); if (!(old_flags & FDMON_IO_URING_PENDING)) { QSLIST_INSERT_HEAD_ATOMIC(head, node, node_submitted); } @@ -127,7 +127,7 @@ static AioHandler *dequeue(AioHandlerSList *head, unsigned *flags) * telling process_cqe() to delete the AioHandler when its * IORING_OP_POLL_ADD completes. */ - *flags = atomic_fetch_and(&node->flags, ~(FDMON_IO_URING_PENDING | + *flags = qatomic_fetch_and(&node->flags, ~(FDMON_IO_URING_PENDING | FDMON_IO_URING_ADD)); return node; } @@ -233,7 +233,7 @@ static bool process_cqe(AioContext *ctx, * with enqueue() here then we can safely clear the FDMON_IO_URING_REMOVE * bit before IORING_OP_POLL_REMOVE is submitted. */ - flags = atomic_fetch_and(&node->flags, ~FDMON_IO_URING_REMOVE); + flags = qatomic_fetch_and(&node->flags, ~FDMON_IO_URING_REMOVE); if (flags & FDMON_IO_URING_REMOVE) { QLIST_INSERT_HEAD_RCU(&ctx->deleted_aio_handlers, node, node_deleted); return false; @@ -273,7 +273,7 @@ static int fdmon_io_uring_wait(AioContext *ctx, AioHandlerList *ready_list, int ret; /* Fall back while external clients are disabled */ - if (atomic_read(&ctx->external_disable_cnt)) { + if (qatomic_read(&ctx->external_disable_cnt)) { return fdmon_poll_ops.wait(ctx, ready_list, timeout); } @@ -312,7 +312,7 @@ static bool fdmon_io_uring_need_wait(AioContext *ctx) } /* Are we falling back to fdmon-poll? */ - return atomic_read(&ctx->external_disable_cnt); + return qatomic_read(&ctx->external_disable_cnt); } static const FDMonOps fdmon_io_uring_ops = { @@ -344,7 +344,7 @@ void fdmon_io_uring_destroy(AioContext *ctx) /* Move handlers due to be removed onto the deleted list */ while ((node = QSLIST_FIRST_RCU(&ctx->submit_list))) { - unsigned flags = atomic_fetch_and(&node->flags, + unsigned flags = qatomic_fetch_and(&node->flags, ~(FDMON_IO_URING_PENDING | FDMON_IO_URING_ADD | FDMON_IO_URING_REMOVE)); diff --git a/util/fdmon-poll.c b/util/fdmon-poll.c index 488067b679..5fe3b47865 100644 --- a/util/fdmon-poll.c +++ b/util/fdmon-poll.c @@ -73,6 +73,7 @@ static int fdmon_poll_wait(AioContext *ctx, AioHandlerList *ready_list, /* epoll(7) is faster above a certain number of fds */ if (fdmon_epoll_try_upgrade(ctx, npfd)) { + npfd = 0; /* we won't need pollfds[], reset npfd */ return ctx->fdmon_ops->wait(ctx, ready_list, timeout); } diff --git a/util/iov.c b/util/iov.c index ae61d696aa..f3a9e92a37 100644 --- a/util/iov.c +++ b/util/iov.c @@ -636,14 +636,33 @@ void qemu_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, void *buf) } } -size_t iov_discard_front(struct iovec **iov, unsigned int *iov_cnt, - size_t bytes) +void iov_discard_undo(IOVDiscardUndo *undo) +{ + /* Restore original iovec if it was modified */ + if (undo->modified_iov) { + *undo->modified_iov = undo->orig; + } +} + +size_t iov_discard_front_undoable(struct iovec **iov, + unsigned int *iov_cnt, + size_t bytes, + IOVDiscardUndo *undo) { size_t total = 0; struct iovec *cur; + if (undo) { + undo->modified_iov = NULL; + } + for (cur = *iov; *iov_cnt > 0; cur++) { if (cur->iov_len > bytes) { + if (undo) { + undo->modified_iov = cur; + undo->orig = *cur; + } + cur->iov_base += bytes; cur->iov_len -= bytes; total += bytes; @@ -659,12 +678,24 @@ size_t iov_discard_front(struct iovec **iov, unsigned int *iov_cnt, return total; } -size_t iov_discard_back(struct iovec *iov, unsigned int *iov_cnt, - size_t bytes) +size_t iov_discard_front(struct iovec **iov, unsigned int *iov_cnt, + size_t bytes) +{ + return iov_discard_front_undoable(iov, iov_cnt, bytes, NULL); +} + +size_t iov_discard_back_undoable(struct iovec *iov, + unsigned int *iov_cnt, + size_t bytes, + IOVDiscardUndo *undo) { size_t total = 0; struct iovec *cur; + if (undo) { + undo->modified_iov = NULL; + } + if (*iov_cnt == 0) { return 0; } @@ -673,6 +704,11 @@ size_t iov_discard_back(struct iovec *iov, unsigned int *iov_cnt, while (*iov_cnt > 0) { if (cur->iov_len > bytes) { + if (undo) { + undo->modified_iov = cur; + undo->orig = *cur; + } + cur->iov_len -= bytes; total += bytes; break; @@ -687,6 +723,12 @@ size_t iov_discard_back(struct iovec *iov, unsigned int *iov_cnt, return total; } +size_t iov_discard_back(struct iovec *iov, unsigned int *iov_cnt, + size_t bytes) +{ + return iov_discard_back_undoable(iov, iov_cnt, bytes, NULL); +} + void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes) { size_t total; diff --git a/util/lockcnt.c b/util/lockcnt.c index 4f88dcf8b8..5da36946b1 100644 --- a/util/lockcnt.c +++ b/util/lockcnt.c @@ -61,7 +61,7 @@ static bool qemu_lockcnt_cmpxchg_or_wait(QemuLockCnt *lockcnt, int *val, int expected = *val; trace_lockcnt_fast_path_attempt(lockcnt, expected, new_if_free); - *val = atomic_cmpxchg(&lockcnt->count, expected, new_if_free); + *val = qatomic_cmpxchg(&lockcnt->count, expected, new_if_free); if (*val == expected) { trace_lockcnt_fast_path_success(lockcnt, expected, new_if_free); *val = new_if_free; @@ -81,7 +81,7 @@ static bool qemu_lockcnt_cmpxchg_or_wait(QemuLockCnt *lockcnt, int *val, int new = expected - QEMU_LOCKCNT_STATE_LOCKED + QEMU_LOCKCNT_STATE_WAITING; trace_lockcnt_futex_wait_prepare(lockcnt, expected, new); - *val = atomic_cmpxchg(&lockcnt->count, expected, new); + *val = qatomic_cmpxchg(&lockcnt->count, expected, new); if (*val == expected) { *val = new; } @@ -92,7 +92,7 @@ static bool qemu_lockcnt_cmpxchg_or_wait(QemuLockCnt *lockcnt, int *val, *waited = true; trace_lockcnt_futex_wait(lockcnt, *val); qemu_futex_wait(&lockcnt->count, *val); - *val = atomic_read(&lockcnt->count); + *val = qatomic_read(&lockcnt->count); trace_lockcnt_futex_wait_resume(lockcnt, *val); continue; } @@ -110,13 +110,14 @@ static void lockcnt_wake(QemuLockCnt *lockcnt) void qemu_lockcnt_inc(QemuLockCnt *lockcnt) { - int val = atomic_read(&lockcnt->count); + int val = qatomic_read(&lockcnt->count); bool waited = false; for (;;) { if (val >= QEMU_LOCKCNT_COUNT_STEP) { int expected = val; - val = atomic_cmpxchg(&lockcnt->count, val, val + QEMU_LOCKCNT_COUNT_STEP); + val = qatomic_cmpxchg(&lockcnt->count, val, + val + QEMU_LOCKCNT_COUNT_STEP); if (val == expected) { break; } @@ -142,7 +143,7 @@ void qemu_lockcnt_inc(QemuLockCnt *lockcnt) void qemu_lockcnt_dec(QemuLockCnt *lockcnt) { - atomic_sub(&lockcnt->count, QEMU_LOCKCNT_COUNT_STEP); + qatomic_sub(&lockcnt->count, QEMU_LOCKCNT_COUNT_STEP); } /* Decrement a counter, and return locked if it is decremented to zero. @@ -151,14 +152,15 @@ void qemu_lockcnt_dec(QemuLockCnt *lockcnt) */ bool qemu_lockcnt_dec_and_lock(QemuLockCnt *lockcnt) { - int val = atomic_read(&lockcnt->count); + int val = qatomic_read(&lockcnt->count); int locked_state = QEMU_LOCKCNT_STATE_LOCKED; bool waited = false; for (;;) { if (val >= 2 * QEMU_LOCKCNT_COUNT_STEP) { int expected = val; - val = atomic_cmpxchg(&lockcnt->count, val, val - QEMU_LOCKCNT_COUNT_STEP); + val = qatomic_cmpxchg(&lockcnt->count, val, + val - QEMU_LOCKCNT_COUNT_STEP); if (val == expected) { break; } @@ -199,7 +201,7 @@ bool qemu_lockcnt_dec_and_lock(QemuLockCnt *lockcnt) */ bool qemu_lockcnt_dec_if_lock(QemuLockCnt *lockcnt) { - int val = atomic_read(&lockcnt->count); + int val = qatomic_read(&lockcnt->count); int locked_state = QEMU_LOCKCNT_STATE_LOCKED; bool waited = false; @@ -233,7 +235,7 @@ bool qemu_lockcnt_dec_if_lock(QemuLockCnt *lockcnt) void qemu_lockcnt_lock(QemuLockCnt *lockcnt) { - int val = atomic_read(&lockcnt->count); + int val = qatomic_read(&lockcnt->count); int step = QEMU_LOCKCNT_STATE_LOCKED; bool waited = false; @@ -255,12 +257,12 @@ void qemu_lockcnt_inc_and_unlock(QemuLockCnt *lockcnt) { int expected, new, val; - val = atomic_read(&lockcnt->count); + val = qatomic_read(&lockcnt->count); do { expected = val; new = (val + QEMU_LOCKCNT_COUNT_STEP) & ~QEMU_LOCKCNT_STATE_MASK; trace_lockcnt_unlock_attempt(lockcnt, val, new); - val = atomic_cmpxchg(&lockcnt->count, val, new); + val = qatomic_cmpxchg(&lockcnt->count, val, new); } while (val != expected); trace_lockcnt_unlock_success(lockcnt, val, new); @@ -273,12 +275,12 @@ void qemu_lockcnt_unlock(QemuLockCnt *lockcnt) { int expected, new, val; - val = atomic_read(&lockcnt->count); + val = qatomic_read(&lockcnt->count); do { expected = val; new = val & ~QEMU_LOCKCNT_STATE_MASK; trace_lockcnt_unlock_attempt(lockcnt, val, new); - val = atomic_cmpxchg(&lockcnt->count, val, new); + val = qatomic_cmpxchg(&lockcnt->count, val, new); } while (val != expected); trace_lockcnt_unlock_success(lockcnt, val, new); @@ -289,7 +291,7 @@ void qemu_lockcnt_unlock(QemuLockCnt *lockcnt) unsigned qemu_lockcnt_count(QemuLockCnt *lockcnt) { - return atomic_read(&lockcnt->count) >> QEMU_LOCKCNT_COUNT_SHIFT; + return qatomic_read(&lockcnt->count) >> QEMU_LOCKCNT_COUNT_SHIFT; } #else void qemu_lockcnt_init(QemuLockCnt *lockcnt) @@ -307,13 +309,13 @@ void qemu_lockcnt_inc(QemuLockCnt *lockcnt) { int old; for (;;) { - old = atomic_read(&lockcnt->count); + old = qatomic_read(&lockcnt->count); if (old == 0) { qemu_lockcnt_lock(lockcnt); qemu_lockcnt_inc_and_unlock(lockcnt); return; } else { - if (atomic_cmpxchg(&lockcnt->count, old, old + 1) == old) { + if (qatomic_cmpxchg(&lockcnt->count, old, old + 1) == old) { return; } } @@ -322,7 +324,7 @@ void qemu_lockcnt_inc(QemuLockCnt *lockcnt) void qemu_lockcnt_dec(QemuLockCnt *lockcnt) { - atomic_dec(&lockcnt->count); + qatomic_dec(&lockcnt->count); } /* Decrement a counter, and return locked if it is decremented to zero. @@ -331,9 +333,9 @@ void qemu_lockcnt_dec(QemuLockCnt *lockcnt) */ bool qemu_lockcnt_dec_and_lock(QemuLockCnt *lockcnt) { - int val = atomic_read(&lockcnt->count); + int val = qatomic_read(&lockcnt->count); while (val > 1) { - int old = atomic_cmpxchg(&lockcnt->count, val, val - 1); + int old = qatomic_cmpxchg(&lockcnt->count, val, val - 1); if (old != val) { val = old; continue; @@ -343,7 +345,7 @@ bool qemu_lockcnt_dec_and_lock(QemuLockCnt *lockcnt) } qemu_lockcnt_lock(lockcnt); - if (atomic_fetch_dec(&lockcnt->count) == 1) { + if (qatomic_fetch_dec(&lockcnt->count) == 1) { return true; } @@ -360,13 +362,13 @@ bool qemu_lockcnt_dec_and_lock(QemuLockCnt *lockcnt) bool qemu_lockcnt_dec_if_lock(QemuLockCnt *lockcnt) { /* No need for acquire semantics if we return false. */ - int val = atomic_read(&lockcnt->count); + int val = qatomic_read(&lockcnt->count); if (val > 1) { return false; } qemu_lockcnt_lock(lockcnt); - if (atomic_fetch_dec(&lockcnt->count) == 1) { + if (qatomic_fetch_dec(&lockcnt->count) == 1) { return true; } @@ -381,7 +383,7 @@ void qemu_lockcnt_lock(QemuLockCnt *lockcnt) void qemu_lockcnt_inc_and_unlock(QemuLockCnt *lockcnt) { - atomic_inc(&lockcnt->count); + qatomic_inc(&lockcnt->count); qemu_mutex_unlock(&lockcnt->mutex); } @@ -392,6 +394,6 @@ void qemu_lockcnt_unlock(QemuLockCnt *lockcnt) unsigned qemu_lockcnt_count(QemuLockCnt *lockcnt) { - return atomic_read(&lockcnt->count); + return qatomic_read(&lockcnt->count); } #endif diff --git a/util/log.c b/util/log.c index bdb3d712e8..4b423062aa 100644 --- a/util/log.c +++ b/util/log.c @@ -41,7 +41,7 @@ int qemu_log(const char *fmt, ...) QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { va_list ap; va_start(ap, fmt); @@ -98,7 +98,7 @@ void qemu_set_log(int log_flags) QEMU_LOCK_GUARD(&qemu_logfile_mutex); if (qemu_logfile && !need_to_open_file) { logfile = qemu_logfile; - atomic_rcu_set(&qemu_logfile, NULL); + qatomic_rcu_set(&qemu_logfile, NULL); call_rcu(logfile, qemu_logfile_free, rcu); } else if (!qemu_logfile && need_to_open_file) { logfile = g_new0(QemuLogFile, 1); @@ -135,7 +135,7 @@ void qemu_set_log(int log_flags) #endif log_append = 1; } - atomic_rcu_set(&qemu_logfile, logfile); + qatomic_rcu_set(&qemu_logfile, logfile); } } @@ -272,7 +272,7 @@ void qemu_log_flush(void) QemuLogFile *logfile; rcu_read_lock(); - logfile = atomic_rcu_read(&qemu_logfile); + logfile = qatomic_rcu_read(&qemu_logfile); if (logfile) { fflush(logfile->fd); } @@ -288,7 +288,7 @@ void qemu_log_close(void) logfile = qemu_logfile; if (logfile) { - atomic_rcu_set(&qemu_logfile, NULL); + qatomic_rcu_set(&qemu_logfile, NULL); call_rcu(logfile, qemu_logfile_free, rcu); } qemu_mutex_unlock(&qemu_logfile_mutex); diff --git a/util/qemu-coroutine-lock.c b/util/qemu-coroutine-lock.c index 5da5234155..36927b5f88 100644 --- a/util/qemu-coroutine-lock.c +++ b/util/qemu-coroutine-lock.c @@ -212,10 +212,10 @@ static void coroutine_fn qemu_co_mutex_lock_slowpath(AioContext *ctx, /* This is the "Responsibility Hand-Off" protocol; a lock() picks from * a concurrent unlock() the responsibility of waking somebody up. */ - old_handoff = atomic_mb_read(&mutex->handoff); + old_handoff = qatomic_mb_read(&mutex->handoff); if (old_handoff && has_waiters(mutex) && - atomic_cmpxchg(&mutex->handoff, old_handoff, 0) == old_handoff) { + qatomic_cmpxchg(&mutex->handoff, old_handoff, 0) == old_handoff) { /* There can be no concurrent pops, because there can be only * one active handoff at a time. */ @@ -250,18 +250,18 @@ void coroutine_fn qemu_co_mutex_lock(CoMutex *mutex) */ i = 0; retry_fast_path: - waiters = atomic_cmpxchg(&mutex->locked, 0, 1); + waiters = qatomic_cmpxchg(&mutex->locked, 0, 1); if (waiters != 0) { while (waiters == 1 && ++i < 1000) { - if (atomic_read(&mutex->ctx) == ctx) { + if (qatomic_read(&mutex->ctx) == ctx) { break; } - if (atomic_read(&mutex->locked) == 0) { + if (qatomic_read(&mutex->locked) == 0) { goto retry_fast_path; } cpu_relax(); } - waiters = atomic_fetch_inc(&mutex->locked); + waiters = qatomic_fetch_inc(&mutex->locked); } if (waiters == 0) { @@ -288,7 +288,7 @@ void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex) mutex->ctx = NULL; mutex->holder = NULL; self->locks_held--; - if (atomic_fetch_dec(&mutex->locked) == 1) { + if (qatomic_fetch_dec(&mutex->locked) == 1) { /* No waiting qemu_co_mutex_lock(). Pfew, that was easy! */ return; } @@ -311,7 +311,7 @@ void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex) } our_handoff = mutex->sequence; - atomic_mb_set(&mutex->handoff, our_handoff); + qatomic_mb_set(&mutex->handoff, our_handoff); if (!has_waiters(mutex)) { /* The concurrent lock has not added itself yet, so it * will be able to pick our handoff. @@ -322,7 +322,7 @@ void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex) /* Try to do the handoff protocol ourselves; if somebody else has * already taken it, however, we're done and they're responsible. */ - if (atomic_cmpxchg(&mutex->handoff, our_handoff, 0) != our_handoff) { + if (qatomic_cmpxchg(&mutex->handoff, our_handoff, 0) != our_handoff) { break; } } diff --git a/util/qemu-coroutine-sleep.c b/util/qemu-coroutine-sleep.c index 769a76e57d..8c4dac4fd7 100644 --- a/util/qemu-coroutine-sleep.c +++ b/util/qemu-coroutine-sleep.c @@ -28,7 +28,7 @@ struct QemuCoSleepState { void qemu_co_sleep_wake(QemuCoSleepState *sleep_state) { /* Write of schedule protected by barrier write in aio_co_schedule */ - const char *scheduled = atomic_cmpxchg(&sleep_state->co->scheduled, + const char *scheduled = qatomic_cmpxchg(&sleep_state->co->scheduled, qemu_co_sleep_ns__scheduled, NULL); assert(scheduled == qemu_co_sleep_ns__scheduled); @@ -54,7 +54,7 @@ void coroutine_fn qemu_co_sleep_ns_wakeable(QEMUClockType type, int64_t ns, .user_state_pointer = sleep_state, }; - const char *scheduled = atomic_cmpxchg(&state.co->scheduled, NULL, + const char *scheduled = qatomic_cmpxchg(&state.co->scheduled, NULL, qemu_co_sleep_ns__scheduled); if (scheduled) { fprintf(stderr, diff --git a/util/qemu-coroutine.c b/util/qemu-coroutine.c index c3caa6c770..38fb6d3084 100644 --- a/util/qemu-coroutine.c +++ b/util/qemu-coroutine.c @@ -60,7 +60,7 @@ Coroutine *qemu_coroutine_create(CoroutineEntry *entry, void *opaque) * release_pool_size and the actual size of release_pool. But * it is just a heuristic, it does not need to be perfect. */ - alloc_pool_size = atomic_xchg(&release_pool_size, 0); + alloc_pool_size = qatomic_xchg(&release_pool_size, 0); QSLIST_MOVE_ATOMIC(&alloc_pool, &release_pool); co = QSLIST_FIRST(&alloc_pool); } @@ -88,7 +88,7 @@ static void coroutine_delete(Coroutine *co) if (CONFIG_COROUTINE_POOL) { if (release_pool_size < POOL_BATCH_SIZE * 2) { QSLIST_INSERT_HEAD_ATOMIC(&release_pool, co, pool_next); - atomic_inc(&release_pool_size); + qatomic_inc(&release_pool_size); return; } if (alloc_pool_size < POOL_BATCH_SIZE) { @@ -115,7 +115,7 @@ void qemu_aio_coroutine_enter(AioContext *ctx, Coroutine *co) /* Cannot rely on the read barrier for to in aio_co_wake(), as there are * callers outside of aio_co_wake() */ - const char *scheduled = atomic_mb_read(&to->scheduled); + const char *scheduled = qatomic_mb_read(&to->scheduled); QSIMPLEQ_REMOVE_HEAD(&pending, co_queue_next); diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c index 99ce2fd5e6..de4bf7616e 100644 --- a/util/qemu-sockets.c +++ b/util/qemu-sockets.c @@ -395,7 +395,7 @@ static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr, memset(&ai, 0, sizeof(ai)); ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; - if (atomic_read(&useV4Mapped)) { + if (qatomic_read(&useV4Mapped)) { ai.ai_flags |= AI_V4MAPPED; } ai.ai_family = inet_ai_family_from_address(saddr, &err); @@ -421,7 +421,7 @@ static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr, */ if (rc == EAI_BADFLAGS && (ai.ai_flags & AI_V4MAPPED)) { - atomic_set(&useV4Mapped, 0); + qatomic_set(&useV4Mapped, 0); ai.ai_flags &= ~AI_V4MAPPED; rc = getaddrinfo(saddr->host, saddr->port, &ai, &res); } diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c index b4c2359272..dcff5e7c5d 100644 --- a/util/qemu-thread-posix.c +++ b/util/qemu-thread-posix.c @@ -414,8 +414,8 @@ void qemu_event_set(QemuEvent *ev) */ assert(ev->initialized); smp_mb(); - if (atomic_read(&ev->value) != EV_SET) { - if (atomic_xchg(&ev->value, EV_SET) == EV_BUSY) { + if (qatomic_read(&ev->value) != EV_SET) { + if (qatomic_xchg(&ev->value, EV_SET) == EV_BUSY) { /* There were waiters, wake them up. */ qemu_futex_wake(ev, INT_MAX); } @@ -427,14 +427,14 @@ void qemu_event_reset(QemuEvent *ev) unsigned value; assert(ev->initialized); - value = atomic_read(&ev->value); + value = qatomic_read(&ev->value); smp_mb_acquire(); if (value == EV_SET) { /* * If there was a concurrent reset (or even reset+wait), * do nothing. Otherwise change EV_SET->EV_FREE. */ - atomic_or(&ev->value, EV_FREE); + qatomic_or(&ev->value, EV_FREE); } } @@ -443,7 +443,7 @@ void qemu_event_wait(QemuEvent *ev) unsigned value; assert(ev->initialized); - value = atomic_read(&ev->value); + value = qatomic_read(&ev->value); smp_mb_acquire(); if (value != EV_SET) { if (value == EV_FREE) { @@ -453,7 +453,7 @@ void qemu_event_wait(QemuEvent *ev) * a concurrent busy->free transition. After the CAS, the * event will be either set or busy. */ - if (atomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) { + if (qatomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) { return; } } diff --git a/util/qemu-thread-win32.c b/util/qemu-thread-win32.c index d207b0cb58..cb5aa2018c 100644 --- a/util/qemu-thread-win32.c +++ b/util/qemu-thread-win32.c @@ -250,8 +250,8 @@ void qemu_event_set(QemuEvent *ev) * ev->value we need a full memory barrier here. */ smp_mb(); - if (atomic_read(&ev->value) != EV_SET) { - if (atomic_xchg(&ev->value, EV_SET) == EV_BUSY) { + if (qatomic_read(&ev->value) != EV_SET) { + if (qatomic_xchg(&ev->value, EV_SET) == EV_BUSY) { /* There were waiters, wake them up. */ SetEvent(ev->event); } @@ -263,13 +263,13 @@ void qemu_event_reset(QemuEvent *ev) unsigned value; assert(ev->initialized); - value = atomic_read(&ev->value); + value = qatomic_read(&ev->value); smp_mb_acquire(); if (value == EV_SET) { /* If there was a concurrent reset (or even reset+wait), * do nothing. Otherwise change EV_SET->EV_FREE. */ - atomic_or(&ev->value, EV_FREE); + qatomic_or(&ev->value, EV_FREE); } } @@ -278,7 +278,7 @@ void qemu_event_wait(QemuEvent *ev) unsigned value; assert(ev->initialized); - value = atomic_read(&ev->value); + value = qatomic_read(&ev->value); smp_mb_acquire(); if (value != EV_SET) { if (value == EV_FREE) { @@ -292,7 +292,7 @@ void qemu_event_wait(QemuEvent *ev) * because there cannot be a concurrent busy->free transition. * After the CAS, the event will be either set or busy. */ - if (atomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) { + if (qatomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) { value = EV_SET; } else { value = EV_BUSY; diff --git a/util/qemu-timer.c b/util/qemu-timer.c index 878d80fd5e..ca677836cb 100644 --- a/util/qemu-timer.c +++ b/util/qemu-timer.c @@ -170,7 +170,7 @@ void qemu_clock_enable(QEMUClockType type, bool enabled) bool timerlist_has_timers(QEMUTimerList *timer_list) { - return !!atomic_read(&timer_list->active_timers); + return !!qatomic_read(&timer_list->active_timers); } bool qemu_clock_has_timers(QEMUClockType type) @@ -183,7 +183,7 @@ bool timerlist_expired(QEMUTimerList *timer_list) { int64_t expire_time; - if (!atomic_read(&timer_list->active_timers)) { + if (!qatomic_read(&timer_list->active_timers)) { return false; } @@ -213,7 +213,7 @@ int64_t timerlist_deadline_ns(QEMUTimerList *timer_list) int64_t delta; int64_t expire_time; - if (!atomic_read(&timer_list->active_timers)) { + if (!qatomic_read(&timer_list->active_timers)) { return -1; } @@ -385,7 +385,7 @@ static void timer_del_locked(QEMUTimerList *timer_list, QEMUTimer *ts) if (!t) break; if (t == ts) { - atomic_set(pt, t->next); + qatomic_set(pt, t->next); break; } pt = &t->next; @@ -408,7 +408,7 @@ static bool timer_mod_ns_locked(QEMUTimerList *timer_list, } ts->expire_time = MAX(expire_time, 0); ts->next = *pt; - atomic_set(pt, ts); + qatomic_set(pt, ts); return pt == &timer_list->active_timers; } @@ -502,7 +502,7 @@ bool timerlist_run_timers(QEMUTimerList *timer_list) QEMUTimerCB *cb; void *opaque; - if (!atomic_read(&timer_list->active_timers)) { + if (!qatomic_read(&timer_list->active_timers)) { return false; } diff --git a/util/qht.c b/util/qht.c index b2e020c398..079605121b 100644 --- a/util/qht.c +++ b/util/qht.c @@ -131,11 +131,11 @@ static inline void qht_unlock(struct qht *ht) /* * Note: reading partially-updated pointers in @pointers could lead to - * segfaults. We thus access them with atomic_read/set; this guarantees + * segfaults. We thus access them with qatomic_read/set; this guarantees * that the compiler makes all those accesses atomic. We also need the - * volatile-like behavior in atomic_read, since otherwise the compiler + * volatile-like behavior in qatomic_read, since otherwise the compiler * might refetch the pointer. - * atomic_read's are of course not necessary when the bucket lock is held. + * qatomic_read's are of course not necessary when the bucket lock is held. * * If both ht->lock and b->lock are grabbed, ht->lock should always * be grabbed first. @@ -286,7 +286,7 @@ void qht_map_lock_buckets__no_stale(struct qht *ht, struct qht_map **pmap) { struct qht_map *map; - map = atomic_rcu_read(&ht->map); + map = qatomic_rcu_read(&ht->map); qht_map_lock_buckets(map); if (likely(!qht_map_is_stale__locked(ht, map))) { *pmap = map; @@ -318,7 +318,7 @@ struct qht_bucket *qht_bucket_lock__no_stale(struct qht *ht, uint32_t hash, struct qht_bucket *b; struct qht_map *map; - map = atomic_rcu_read(&ht->map); + map = qatomic_rcu_read(&ht->map); b = qht_map_to_bucket(map, hash); qemu_spin_lock(&b->lock); @@ -340,7 +340,8 @@ struct qht_bucket *qht_bucket_lock__no_stale(struct qht *ht, uint32_t hash, static inline bool qht_map_needs_resize(const struct qht_map *map) { - return atomic_read(&map->n_added_buckets) > map->n_added_buckets_threshold; + return qatomic_read(&map->n_added_buckets) > + map->n_added_buckets_threshold; } static inline void qht_chain_destroy(const struct qht_bucket *head) @@ -404,7 +405,7 @@ void qht_init(struct qht *ht, qht_cmp_func_t cmp, size_t n_elems, ht->mode = mode; qemu_mutex_init(&ht->lock); map = qht_map_create(n_buckets); - atomic_rcu_set(&ht->map, map); + qatomic_rcu_set(&ht->map, map); } /* call only when there are no readers/writers left */ @@ -425,8 +426,8 @@ static void qht_bucket_reset__locked(struct qht_bucket *head) if (b->pointers[i] == NULL) { goto done; } - atomic_set(&b->hashes[i], 0); - atomic_set(&b->pointers[i], NULL); + qatomic_set(&b->hashes[i], 0); + qatomic_set(&b->pointers[i], NULL); } b = b->next; } while (b); @@ -492,19 +493,19 @@ void *qht_do_lookup(const struct qht_bucket *head, qht_lookup_func_t func, do { for (i = 0; i < QHT_BUCKET_ENTRIES; i++) { - if (atomic_read(&b->hashes[i]) == hash) { + if (qatomic_read(&b->hashes[i]) == hash) { /* The pointer is dereferenced before seqlock_read_retry, * so (unlike qht_insert__locked) we need to use - * atomic_rcu_read here. + * qatomic_rcu_read here. */ - void *p = atomic_rcu_read(&b->pointers[i]); + void *p = qatomic_rcu_read(&b->pointers[i]); if (likely(p) && likely(func(p, userp))) { return p; } } } - b = atomic_rcu_read(&b->next); + b = qatomic_rcu_read(&b->next); } while (b); return NULL; @@ -532,7 +533,7 @@ void *qht_lookup_custom(const struct qht *ht, const void *userp, uint32_t hash, unsigned int version; void *ret; - map = atomic_rcu_read(&ht->map); + map = qatomic_rcu_read(&ht->map); b = qht_map_to_bucket(map, hash); version = seqlock_read_begin(&b->sequence); @@ -584,7 +585,7 @@ static void *qht_insert__locked(const struct qht *ht, struct qht_map *map, memset(b, 0, sizeof(*b)); new = b; i = 0; - atomic_inc(&map->n_added_buckets); + qatomic_inc(&map->n_added_buckets); if (unlikely(qht_map_needs_resize(map)) && needs_resize) { *needs_resize = true; } @@ -593,11 +594,11 @@ static void *qht_insert__locked(const struct qht *ht, struct qht_map *map, /* found an empty key: acquire the seqlock and write */ seqlock_write_begin(&head->sequence); if (new) { - atomic_rcu_set(&prev->next, b); + qatomic_rcu_set(&prev->next, b); } /* smp_wmb() implicit in seqlock_write_begin. */ - atomic_set(&b->hashes[i], hash); - atomic_set(&b->pointers[i], p); + qatomic_set(&b->hashes[i], hash); + qatomic_set(&b->pointers[i], p); seqlock_write_end(&head->sequence); return NULL; } @@ -668,11 +669,11 @@ qht_entry_move(struct qht_bucket *to, int i, struct qht_bucket *from, int j) qht_debug_assert(to->pointers[i]); qht_debug_assert(from->pointers[j]); - atomic_set(&to->hashes[i], from->hashes[j]); - atomic_set(&to->pointers[i], from->pointers[j]); + qatomic_set(&to->hashes[i], from->hashes[j]); + qatomic_set(&to->pointers[i], from->pointers[j]); - atomic_set(&from->hashes[j], 0); - atomic_set(&from->pointers[j], NULL); + qatomic_set(&from->hashes[j], 0); + qatomic_set(&from->pointers[j], NULL); } /* @@ -687,7 +688,7 @@ static inline void qht_bucket_remove_entry(struct qht_bucket *orig, int pos) if (qht_entry_is_last(orig, pos)) { orig->hashes[pos] = 0; - atomic_set(&orig->pointers[pos], NULL); + qatomic_set(&orig->pointers[pos], NULL); return; } do { @@ -803,7 +804,7 @@ do_qht_iter(struct qht *ht, const struct qht_iter *iter, void *userp) { struct qht_map *map; - map = atomic_rcu_read(&ht->map); + map = qatomic_rcu_read(&ht->map); qht_map_lock_buckets(map); qht_map_iter__all_locked(map, iter, userp); qht_map_unlock_buckets(map); @@ -876,7 +877,7 @@ static void qht_do_resize_reset(struct qht *ht, struct qht_map *new, bool reset) qht_map_iter__all_locked(old, &iter, &data); qht_map_debug__all_locked(new); - atomic_rcu_set(&ht->map, new); + qatomic_rcu_set(&ht->map, new); qht_map_unlock_buckets(old); call_rcu(old, qht_map_destroy, rcu); } @@ -905,7 +906,7 @@ void qht_statistics_init(const struct qht *ht, struct qht_stats *stats) const struct qht_map *map; int i; - map = atomic_rcu_read(&ht->map); + map = qatomic_rcu_read(&ht->map); stats->used_head_buckets = 0; stats->entries = 0; @@ -933,13 +934,13 @@ void qht_statistics_init(const struct qht *ht, struct qht_stats *stats) b = head; do { for (j = 0; j < QHT_BUCKET_ENTRIES; j++) { - if (atomic_read(&b->pointers[j]) == NULL) { + if (qatomic_read(&b->pointers[j]) == NULL) { break; } entries++; } buckets++; - b = atomic_rcu_read(&b->next); + b = qatomic_rcu_read(&b->next); } while (b); } while (seqlock_read_retry(&head->sequence, version)); diff --git a/util/qsp.c b/util/qsp.c index 7d5147f1b2..bacc5fa2f6 100644 --- a/util/qsp.c +++ b/util/qsp.c @@ -245,11 +245,11 @@ static void qsp_do_init(void) static __attribute__((noinline)) void qsp_init__slowpath(void) { - if (atomic_cmpxchg(&qsp_initializing, false, true) == false) { + if (qatomic_cmpxchg(&qsp_initializing, false, true) == false) { qsp_do_init(); - atomic_set(&qsp_initialized, true); + qatomic_set(&qsp_initialized, true); } else { - while (!atomic_read(&qsp_initialized)) { + while (!qatomic_read(&qsp_initialized)) { cpu_relax(); } } @@ -258,7 +258,7 @@ static __attribute__((noinline)) void qsp_init__slowpath(void) /* qsp_init() must be called from _all_ exported functions */ static inline void qsp_init(void) { - if (likely(atomic_read(&qsp_initialized))) { + if (likely(qatomic_read(&qsp_initialized))) { return; } qsp_init__slowpath(); @@ -346,9 +346,9 @@ static QSPEntry *qsp_entry_get(const void *obj, const char *file, int line, */ static inline void do_qsp_entry_record(QSPEntry *e, int64_t delta, bool acq) { - atomic_set_u64(&e->ns, e->ns + delta); + qatomic_set_u64(&e->ns, e->ns + delta); if (acq) { - atomic_set_u64(&e->n_acqs, e->n_acqs + 1); + qatomic_set_u64(&e->n_acqs, e->n_acqs + 1); } } @@ -432,29 +432,29 @@ qsp_cond_timedwait(QemuCond *cond, QemuMutex *mutex, int ms, bool qsp_is_enabled(void) { - return atomic_read(&qemu_mutex_lock_func) == qsp_mutex_lock; + return qatomic_read(&qemu_mutex_lock_func) == qsp_mutex_lock; } void qsp_enable(void) { - atomic_set(&qemu_mutex_lock_func, qsp_mutex_lock); - atomic_set(&qemu_mutex_trylock_func, qsp_mutex_trylock); - atomic_set(&qemu_bql_mutex_lock_func, qsp_bql_mutex_lock); - atomic_set(&qemu_rec_mutex_lock_func, qsp_rec_mutex_lock); - atomic_set(&qemu_rec_mutex_trylock_func, qsp_rec_mutex_trylock); - atomic_set(&qemu_cond_wait_func, qsp_cond_wait); - atomic_set(&qemu_cond_timedwait_func, qsp_cond_timedwait); + qatomic_set(&qemu_mutex_lock_func, qsp_mutex_lock); + qatomic_set(&qemu_mutex_trylock_func, qsp_mutex_trylock); + qatomic_set(&qemu_bql_mutex_lock_func, qsp_bql_mutex_lock); + qatomic_set(&qemu_rec_mutex_lock_func, qsp_rec_mutex_lock); + qatomic_set(&qemu_rec_mutex_trylock_func, qsp_rec_mutex_trylock); + qatomic_set(&qemu_cond_wait_func, qsp_cond_wait); + qatomic_set(&qemu_cond_timedwait_func, qsp_cond_timedwait); } void qsp_disable(void) { - atomic_set(&qemu_mutex_lock_func, qemu_mutex_lock_impl); - atomic_set(&qemu_mutex_trylock_func, qemu_mutex_trylock_impl); - atomic_set(&qemu_bql_mutex_lock_func, qemu_mutex_lock_impl); - atomic_set(&qemu_rec_mutex_lock_func, qemu_rec_mutex_lock_impl); - atomic_set(&qemu_rec_mutex_trylock_func, qemu_rec_mutex_trylock_impl); - atomic_set(&qemu_cond_wait_func, qemu_cond_wait_impl); - atomic_set(&qemu_cond_timedwait_func, qemu_cond_timedwait_impl); + qatomic_set(&qemu_mutex_lock_func, qemu_mutex_lock_impl); + qatomic_set(&qemu_mutex_trylock_func, qemu_mutex_trylock_impl); + qatomic_set(&qemu_bql_mutex_lock_func, qemu_mutex_lock_impl); + qatomic_set(&qemu_rec_mutex_lock_func, qemu_rec_mutex_lock_impl); + qatomic_set(&qemu_rec_mutex_trylock_func, qemu_rec_mutex_trylock_impl); + qatomic_set(&qemu_cond_wait_func, qemu_cond_wait_impl); + qatomic_set(&qemu_cond_timedwait_func, qemu_cond_timedwait_impl); } static gint qsp_tree_cmp(gconstpointer ap, gconstpointer bp, gpointer up) @@ -538,8 +538,8 @@ static void qsp_aggregate(void *p, uint32_t h, void *up) * The entry is in the global hash table; read from it atomically (as in * "read once"). */ - agg->ns += atomic_read_u64(&e->ns); - agg->n_acqs += atomic_read_u64(&e->n_acqs); + agg->ns += qatomic_read_u64(&e->ns); + agg->n_acqs += qatomic_read_u64(&e->n_acqs); } static void qsp_iter_diff(void *p, uint32_t hash, void *htp) @@ -610,7 +610,7 @@ static void qsp_mktree(GTree *tree, bool callsite_coalesce) * with the snapshot. */ WITH_RCU_READ_LOCK_GUARD() { - QSPSnapshot *snap = atomic_rcu_read(&qsp_snapshot); + QSPSnapshot *snap = qatomic_rcu_read(&qsp_snapshot); /* Aggregate all results from the global hash table into a local one */ qht_init(&ht, qsp_entry_no_thread_cmp, QSP_INITIAL_SIZE, @@ -806,7 +806,7 @@ void qsp_reset(void) qht_iter(&qsp_ht, qsp_aggregate, &new->ht); /* replace the previous snapshot, if any */ - old = atomic_xchg(&qsp_snapshot, new); + old = qatomic_xchg(&qsp_snapshot, new); if (old) { call_rcu(old, qsp_snapshot_destroy, rcu); } diff --git a/util/rcu.c b/util/rcu.c index c4fefa9333..13ac0f75cb 100644 --- a/util/rcu.c +++ b/util/rcu.c @@ -57,7 +57,7 @@ static inline int rcu_gp_ongoing(unsigned long *ctr) { unsigned long v; - v = atomic_read(ctr); + v = qatomic_read(ctr); return v && (v != rcu_gp_ctr); } @@ -82,14 +82,14 @@ static void wait_for_readers(void) */ qemu_event_reset(&rcu_gp_event); - /* Instead of using atomic_mb_set for index->waiting, and - * atomic_mb_read for index->ctr, memory barriers are placed + /* Instead of using qatomic_mb_set for index->waiting, and + * qatomic_mb_read for index->ctr, memory barriers are placed * manually since writes to different threads are independent. * qemu_event_reset has acquire semantics, so no memory barrier * is needed here. */ QLIST_FOREACH(index, ®istry, node) { - atomic_set(&index->waiting, true); + qatomic_set(&index->waiting, true); } /* Here, order the stores to index->waiting before the loads of @@ -106,7 +106,7 @@ static void wait_for_readers(void) /* No need for mb_set here, worst of all we * get some extra futex wakeups. */ - atomic_set(&index->waiting, false); + qatomic_set(&index->waiting, false); } } @@ -151,7 +151,7 @@ void synchronize_rcu(void) QEMU_LOCK_GUARD(&rcu_registry_lock); if (!QLIST_EMPTY(®istry)) { - /* In either case, the atomic_mb_set below blocks stores that free + /* In either case, the qatomic_mb_set below blocks stores that free * old RCU-protected pointers. */ if (sizeof(rcu_gp_ctr) < 8) { @@ -160,12 +160,12 @@ void synchronize_rcu(void) * * Switch parity: 0 -> 1, 1 -> 0. */ - atomic_mb_set(&rcu_gp_ctr, rcu_gp_ctr ^ RCU_GP_CTR); + qatomic_mb_set(&rcu_gp_ctr, rcu_gp_ctr ^ RCU_GP_CTR); wait_for_readers(); - atomic_mb_set(&rcu_gp_ctr, rcu_gp_ctr ^ RCU_GP_CTR); + qatomic_mb_set(&rcu_gp_ctr, rcu_gp_ctr ^ RCU_GP_CTR); } else { /* Increment current grace period. */ - atomic_mb_set(&rcu_gp_ctr, rcu_gp_ctr + RCU_GP_CTR); + qatomic_mb_set(&rcu_gp_ctr, rcu_gp_ctr + RCU_GP_CTR); } wait_for_readers(); @@ -188,8 +188,8 @@ static void enqueue(struct rcu_head *node) struct rcu_head **old_tail; node->next = NULL; - old_tail = atomic_xchg(&tail, &node->next); - atomic_mb_set(old_tail, node); + old_tail = qatomic_xchg(&tail, &node->next); + qatomic_mb_set(old_tail, node); } static struct rcu_head *try_dequeue(void) @@ -203,7 +203,7 @@ retry: * The tail, because it is the first step in the enqueuing. * It is only the next pointers that might be inconsistent. */ - if (head == &dummy && atomic_mb_read(&tail) == &dummy.next) { + if (head == &dummy && qatomic_mb_read(&tail) == &dummy.next) { abort(); } @@ -211,7 +211,7 @@ retry: * wrong and we need to wait until its enqueuer finishes the update. */ node = head; - next = atomic_mb_read(&head->next); + next = qatomic_mb_read(&head->next); if (!next) { return NULL; } @@ -240,7 +240,7 @@ static void *call_rcu_thread(void *opaque) for (;;) { int tries = 0; - int n = atomic_read(&rcu_call_count); + int n = qatomic_read(&rcu_call_count); /* Heuristically wait for a decent number of callbacks to pile up. * Fetch rcu_call_count now, we only must process elements that were @@ -250,7 +250,7 @@ static void *call_rcu_thread(void *opaque) g_usleep(10000); if (n == 0) { qemu_event_reset(&rcu_call_ready_event); - n = atomic_read(&rcu_call_count); + n = qatomic_read(&rcu_call_count); if (n == 0) { #if defined(CONFIG_MALLOC_TRIM) malloc_trim(4 * 1024 * 1024); @@ -258,10 +258,10 @@ static void *call_rcu_thread(void *opaque) qemu_event_wait(&rcu_call_ready_event); } } - n = atomic_read(&rcu_call_count); + n = qatomic_read(&rcu_call_count); } - atomic_sub(&rcu_call_count, n); + qatomic_sub(&rcu_call_count, n); synchronize_rcu(); qemu_mutex_lock_iothread(); while (n > 0) { @@ -289,7 +289,7 @@ void call_rcu1(struct rcu_head *node, void (*func)(struct rcu_head *node)) { node->func = func; enqueue(node); - atomic_inc(&rcu_call_count); + qatomic_inc(&rcu_call_count); qemu_event_set(&rcu_call_ready_event); } diff --git a/util/stats64.c b/util/stats64.c index 389c365a9e..897613c949 100644 --- a/util/stats64.c +++ b/util/stats64.c @@ -18,27 +18,27 @@ static inline void stat64_rdlock(Stat64 *s) { /* Keep out incoming writers to avoid them starving us. */ - atomic_add(&s->lock, 2); + qatomic_add(&s->lock, 2); /* If there is a concurrent writer, wait for it. */ - while (atomic_read(&s->lock) & 1) { + while (qatomic_read(&s->lock) & 1) { cpu_relax(); } } static inline void stat64_rdunlock(Stat64 *s) { - atomic_sub(&s->lock, 2); + qatomic_sub(&s->lock, 2); } static inline bool stat64_wrtrylock(Stat64 *s) { - return atomic_cmpxchg(&s->lock, 0, 1) == 0; + return qatomic_cmpxchg(&s->lock, 0, 1) == 0; } static inline void stat64_wrunlock(Stat64 *s) { - atomic_dec(&s->lock); + qatomic_dec(&s->lock); } uint64_t stat64_get(const Stat64 *s) @@ -50,8 +50,8 @@ uint64_t stat64_get(const Stat64 *s) /* 64-bit writes always take the lock, so we can read in * any order. */ - high = atomic_read(&s->high); - low = atomic_read(&s->low); + high = qatomic_read(&s->high); + low = qatomic_read(&s->low); stat64_rdunlock((Stat64 *)s); return ((uint64_t)high << 32) | low; @@ -70,9 +70,9 @@ bool stat64_add32_carry(Stat64 *s, uint32_t low, uint32_t high) * order of our update. By updating s->low first, we can check * whether we have to carry into s->high. */ - old = atomic_fetch_add(&s->low, low); + old = qatomic_fetch_add(&s->low, low); high += (old + low) < old; - atomic_add(&s->high, high); + qatomic_add(&s->high, high); stat64_wrunlock(s); return true; } @@ -87,8 +87,8 @@ bool stat64_min_slow(Stat64 *s, uint64_t value) return false; } - high = atomic_read(&s->high); - low = atomic_read(&s->low); + high = qatomic_read(&s->high); + low = qatomic_read(&s->low); orig = ((uint64_t)high << 32) | low; if (value < orig) { @@ -98,9 +98,9 @@ bool stat64_min_slow(Stat64 *s, uint64_t value) * effect on stat64_min is that the slow path may be triggered * unnecessarily. */ - atomic_set(&s->low, (uint32_t)value); + qatomic_set(&s->low, (uint32_t)value); smp_wmb(); - atomic_set(&s->high, value >> 32); + qatomic_set(&s->high, value >> 32); } stat64_wrunlock(s); return true; @@ -116,8 +116,8 @@ bool stat64_max_slow(Stat64 *s, uint64_t value) return false; } - high = atomic_read(&s->high); - low = atomic_read(&s->low); + high = qatomic_read(&s->high); + low = qatomic_read(&s->low); orig = ((uint64_t)high << 32) | low; if (value > orig) { @@ -127,9 +127,9 @@ bool stat64_max_slow(Stat64 *s, uint64_t value) * effect on stat64_max is that the slow path may be triggered * unnecessarily. */ - atomic_set(&s->low, (uint32_t)value); + qatomic_set(&s->low, (uint32_t)value); smp_wmb(); - atomic_set(&s->high, value >> 32); + qatomic_set(&s->high, value >> 32); } stat64_wrunlock(s); return true; |