diff options
| -rw-r--r-- | cpus.c | 22 | ||||
| -rw-r--r-- | include/qom/cpu.h | 6 | ||||
| -rw-r--r-- | qom/cpu.c | 1 |
3 files changed, 24 insertions, 5 deletions
@@ -819,6 +819,8 @@ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) wi.func = func; wi.data = data; wi.free = false; + + qemu_mutex_lock(&cpu->work_mutex); if (cpu->queued_work_first == NULL) { cpu->queued_work_first = &wi; } else { @@ -827,9 +829,10 @@ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) cpu->queued_work_last = &wi; wi.next = NULL; wi.done = false; + qemu_mutex_unlock(&cpu->work_mutex); qemu_cpu_kick(cpu); - while (!wi.done) { + while (!atomic_mb_read(&wi.done)) { CPUState *self_cpu = current_cpu; qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); @@ -850,6 +853,8 @@ void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) wi->func = func; wi->data = data; wi->free = true; + + qemu_mutex_lock(&cpu->work_mutex); if (cpu->queued_work_first == NULL) { cpu->queued_work_first = wi; } else { @@ -858,6 +863,7 @@ void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) cpu->queued_work_last = wi; wi->next = NULL; wi->done = false; + qemu_mutex_unlock(&cpu->work_mutex); qemu_cpu_kick(cpu); } @@ -870,15 +876,23 @@ static void flush_queued_work(CPUState *cpu) return; } - while ((wi = cpu->queued_work_first)) { + qemu_mutex_lock(&cpu->work_mutex); + while (cpu->queued_work_first != NULL) { + wi = cpu->queued_work_first; cpu->queued_work_first = wi->next; + if (!cpu->queued_work_first) { + cpu->queued_work_last = NULL; + } + qemu_mutex_unlock(&cpu->work_mutex); wi->func(wi->data); - wi->done = true; + qemu_mutex_lock(&cpu->work_mutex); if (wi->free) { g_free(wi); + } else { + atomic_mb_set(&wi->done, true); } } - cpu->queued_work_last = NULL; + qemu_mutex_unlock(&cpu->work_mutex); qemu_cond_broadcast(&qemu_work_cond); } diff --git a/include/qom/cpu.h b/include/qom/cpu.h index 2b4936ad2f..c3d610b988 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -243,6 +243,8 @@ struct kvm_run; * @mem_io_pc: Host Program Counter at which the memory was accessed. * @mem_io_vaddr: Target virtual address at which the memory was accessed. * @kvm_fd: vCPU file descriptor for KVM. + * @work_mutex: Lock to prevent multiple access to queued_work_*. + * @queued_work_first: First asynchronous work pending. * * State of one CPU core or thread. */ @@ -263,7 +265,6 @@ struct CPUState { uint32_t host_tid; bool running; struct QemuCond *halt_cond; - struct qemu_work_item *queued_work_first, *queued_work_last; bool thread_kicked; bool created; bool stop; @@ -274,6 +275,9 @@ struct CPUState { int64_t icount_extra; sigjmp_buf jmp_env; + QemuMutex work_mutex; + struct qemu_work_item *queued_work_first, *queued_work_last; + AddressSpace *as; struct AddressSpaceDispatch *memory_dispatch; MemoryListener *tcg_as_listener; @@ -316,6 +316,7 @@ static void cpu_common_initfn(Object *obj) cpu->cpu_index = -1; cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs; + qemu_mutex_init(&cpu->work_mutex); QTAILQ_INIT(&cpu->breakpoints); QTAILQ_INIT(&cpu->watchpoints); } |