diff options
Diffstat (limited to 'cpus.c')
| -rw-r--r-- | cpus.c | 24 |
1 files changed, 22 insertions, 2 deletions
@@ -1317,6 +1317,8 @@ static void prepare_icount_for_run(CPUState *cpu) insns_left = MIN(0xffff, cpu->icount_budget); cpu->icount_decr.u16.low = insns_left; cpu->icount_extra = cpu->icount_budget - insns_left; + + replay_mutex_lock(); } } @@ -1332,6 +1334,8 @@ static void process_icount_data(CPUState *cpu) cpu->icount_budget = 0; replay_account_executed_instructions(); + + replay_mutex_unlock(); } } @@ -1346,11 +1350,9 @@ static int tcg_cpu_exec(CPUState *cpu) #ifdef CONFIG_PROFILER ti = profile_getclock(); #endif - qemu_mutex_unlock_iothread(); cpu_exec_start(cpu); ret = cpu_exec(cpu); cpu_exec_end(cpu); - qemu_mutex_lock_iothread(); #ifdef CONFIG_PROFILER tcg_time += profile_getclock() - ti; #endif @@ -1417,6 +1419,9 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg) cpu->exit_request = 1; while (1) { + qemu_mutex_unlock_iothread(); + replay_mutex_lock(); + qemu_mutex_lock_iothread(); /* Account partial waits to QEMU_CLOCK_VIRTUAL. */ qemu_account_warp_timer(); @@ -1425,6 +1430,8 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg) */ handle_icount_deadline(); + replay_mutex_unlock(); + if (!cpu) { cpu = first_cpu; } @@ -1440,11 +1447,13 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg) if (cpu_can_run(cpu)) { int r; + qemu_mutex_unlock_iothread(); prepare_icount_for_run(cpu); r = tcg_cpu_exec(cpu); process_icount_data(cpu); + qemu_mutex_lock_iothread(); if (r == EXCP_DEBUG) { cpu_handle_guest_debug(cpu); @@ -1634,7 +1643,9 @@ static void *qemu_tcg_cpu_thread_fn(void *arg) while (1) { if (cpu_can_run(cpu)) { int r; + qemu_mutex_unlock_iothread(); r = tcg_cpu_exec(cpu); + qemu_mutex_lock_iothread(); switch (r) { case EXCP_DEBUG: cpu_handle_guest_debug(cpu); @@ -1781,12 +1792,21 @@ void pause_all_vcpus(void) } } + /* We need to drop the replay_lock so any vCPU threads woken up + * can finish their replay tasks + */ + replay_mutex_unlock(); + while (!all_vcpus_paused()) { qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); CPU_FOREACH(cpu) { qemu_cpu_kick(cpu); } } + + qemu_mutex_unlock_iothread(); + replay_mutex_lock(); + qemu_mutex_lock_iothread(); } void cpu_resume(CPUState *cpu) |