diff options
Diffstat (limited to 'accel/tcg/cpu-exec.c')
| -rw-r--r-- | accel/tcg/cpu-exec.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 9b544d88c8..4452cd9856 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -525,19 +525,13 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, TranslationBlock **last_tb) { CPUClass *cc = CPU_GET_CLASS(cpu); - int32_t insns_left; /* Clear the interrupt flag now since we're processing * cpu->interrupt_request and cpu->exit_request. + * Ensure zeroing happens before reading cpu->exit_request or + * cpu->interrupt_request (see also smp_wmb in cpu_exit()) */ - insns_left = atomic_read(&cpu->icount_decr.u32); - atomic_set(&cpu->icount_decr.u16.high, 0); - if (unlikely(insns_left < 0)) { - /* Ensure the zeroing of icount_decr comes before the next read - * of cpu->exit_request or cpu->interrupt_request. - */ - smp_mb(); - } + atomic_mb_set(&cpu->icount_decr.u16.high, 0); if (unlikely(atomic_read(&cpu->interrupt_request))) { int interrupt_request; |