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-rw-r--r--target/s390x/cpu.c5
-rw-r--r--target/s390x/excp_helper.c73
-rw-r--r--target/s390x/internal.h5
-rw-r--r--target/s390x/mem_helper.c16
4 files changed, 55 insertions, 44 deletions
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index b58ef0a8ef..b1df63d82c 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -478,9 +478,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
cc->set_pc = s390_cpu_set_pc;
cc->gdb_read_register = s390_cpu_gdb_read_register;
cc->gdb_write_register = s390_cpu_gdb_write_register;
-#ifdef CONFIG_USER_ONLY
- cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
-#else
+#ifndef CONFIG_USER_ONLY
cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
cc->vmsd = &vmstate_s390_cpu;
cc->write_elf64_note = s390_cpu_write_elf64_note;
@@ -493,6 +491,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
cc->disas_set_info = s390_cpu_disas_set_info;
#ifdef CONFIG_TCG
cc->tcg_initialize = s390x_translate_init;
+ cc->tlb_fill = s390_cpu_tlb_fill;
#endif
cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
diff --git a/target/s390x/excp_helper.c b/target/s390x/excp_helper.c
index f84bfb1284..a4e134bcab 100644
--- a/target/s390x/excp_helper.c
+++ b/target/s390x/excp_helper.c
@@ -74,8 +74,9 @@ void s390_cpu_do_interrupt(CPUState *cs)
cs->exception_index = -1;
}
-int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size,
- int rw, int mmu_idx)
+bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+ MMUAccessType access_type, int mmu_idx,
+ bool probe, uintptr_t retaddr)
{
S390CPU *cpu = S390_CPU(cs);
@@ -83,7 +84,7 @@ int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size,
/* On real machines this value is dropped into LowMem. Since this
is userland, simply put this someplace that cpu_loop can find it. */
cpu->env.__excp_addr = address;
- return 1;
+ cpu_loop_exit_restore(cs, retaddr);
}
#else /* !CONFIG_USER_ONLY */
@@ -102,19 +103,20 @@ static inline uint64_t cpu_mmu_idx_to_asc(int mmu_idx)
}
}
-int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr orig_vaddr, int size,
- int rw, int mmu_idx)
+bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+ MMUAccessType access_type, int mmu_idx,
+ bool probe, uintptr_t retaddr)
{
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
target_ulong vaddr, raddr;
uint64_t asc;
- int prot;
+ int prot, fail;
qemu_log_mask(CPU_LOG_MMU, "%s: addr 0x%" VADDR_PRIx " rw %d mmu_idx %d\n",
- __func__, orig_vaddr, rw, mmu_idx);
+ __func__, address, access_type, mmu_idx);
- vaddr = orig_vaddr;
+ vaddr = address;
if (mmu_idx < MMU_REAL_IDX) {
asc = cpu_mmu_idx_to_asc(mmu_idx);
@@ -122,39 +124,64 @@ int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr orig_vaddr, int size,
if (!(env->psw.mask & PSW_MASK_64)) {
vaddr &= 0x7fffffff;
}
- if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot, true)) {
- return 1;
- }
+ fail = mmu_translate(env, vaddr, access_type, asc, &raddr, &prot, true);
} else if (mmu_idx == MMU_REAL_IDX) {
/* 31-Bit mode */
if (!(env->psw.mask & PSW_MASK_64)) {
vaddr &= 0x7fffffff;
}
- if (mmu_translate_real(env, vaddr, rw, &raddr, &prot)) {
- return 1;
- }
+ fail = mmu_translate_real(env, vaddr, access_type, &raddr, &prot);
} else {
- abort();
+ g_assert_not_reached();
}
/* check out of RAM access */
- if (!address_space_access_valid(&address_space_memory, raddr,
- TARGET_PAGE_SIZE, rw,
+ if (!fail &&
+ !address_space_access_valid(&address_space_memory, raddr,
+ TARGET_PAGE_SIZE, access_type,
MEMTXATTRS_UNSPECIFIED)) {
qemu_log_mask(CPU_LOG_MMU,
"%s: raddr %" PRIx64 " > ram_size %" PRIx64 "\n",
__func__, (uint64_t)raddr, (uint64_t)ram_size);
trigger_pgm_exception(env, PGM_ADDRESSING, ILEN_AUTO);
- return 1;
+ fail = 1;
}
- qemu_log_mask(CPU_LOG_MMU, "%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n",
- __func__, (uint64_t)vaddr, (uint64_t)raddr, prot);
+ if (!fail) {
+ qemu_log_mask(CPU_LOG_MMU,
+ "%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n",
+ __func__, (uint64_t)vaddr, (uint64_t)raddr, prot);
+ tlb_set_page(cs, address & TARGET_PAGE_MASK, raddr, prot,
+ mmu_idx, TARGET_PAGE_SIZE);
+ return true;
+ }
+ if (probe) {
+ return false;
+ }
- tlb_set_page(cs, orig_vaddr & TARGET_PAGE_MASK, raddr, prot,
- mmu_idx, TARGET_PAGE_SIZE);
+ cpu_restore_state(cs, retaddr, true);
+
+ /*
+ * The ILC value for code accesses is undefined. The important
+ * thing here is to *not* leave env->int_pgm_ilen set to ILEN_AUTO,
+ * which would cause do_program_interrupt to attempt to read from
+ * env->psw.addr again. C.f. the condition in trigger_page_fault,
+ * but is not universally applied.
+ *
+ * ??? If we remove ILEN_AUTO, by moving the computation of ILEN
+ * into cpu_restore_state, then we may remove this entirely.
+ */
+ if (access_type == MMU_INST_FETCH) {
+ env->int_pgm_ilen = 2;
+ }
- return 0;
+ cpu_loop_exit(cs);
+}
+
+void tlb_fill(CPUState *cs, target_ulong addr, int size,
+ MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
+{
+ s390_cpu_tlb_fill(cs, addr, size, access_type, mmu_idx, false, retaddr);
}
static void do_program_interrupt(CPUS390XState *env)
diff --git a/target/s390x/internal.h b/target/s390x/internal.h
index 26575f2130..56534b38e0 100644
--- a/target/s390x/internal.h
+++ b/target/s390x/internal.h
@@ -263,8 +263,9 @@ ObjectClass *s390_cpu_class_by_name(const char *name);
void s390x_cpu_debug_excp_handler(CPUState *cs);
void s390_cpu_do_interrupt(CPUState *cpu);
bool s390_cpu_exec_interrupt(CPUState *cpu, int int_req);
-int s390_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size, int rw,
- int mmu_idx);
+bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+ MMUAccessType access_type, int mmu_idx,
+ bool probe, uintptr_t retaddr);
void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index 3f76a8abfd..ffd5f02fbe 100644
--- a/target/s390x/mem_helper.c
+++ b/target/s390x/mem_helper.c
@@ -33,22 +33,6 @@
/*****************************************************************************/
/* Softmmu support */
-#if !defined(CONFIG_USER_ONLY)
-
-/* try to fill the TLB and return an exception if error. If retaddr is
- NULL, it means that the function was called in C code (i.e. not
- from generated code or from helper.c) */
-/* XXX: fix it to restore all registers */
-void tlb_fill(CPUState *cs, target_ulong addr, int size,
- MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
-{
- int ret = s390_cpu_handle_mmu_fault(cs, addr, size, access_type, mmu_idx);
- if (unlikely(ret != 0)) {
- cpu_loop_exit_restore(cs, retaddr);
- }
-}
-
-#endif
/* #define DEBUG_HELPER */
#ifdef DEBUG_HELPER
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-13 17:40:47 +0000