The load side can use a relaxed load, which will surely happen before
the work item is run by async_safe_run_on_cpu() or before double-checking
under mmap_lock. The store side can use an atomic RMW operation.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
tcg_region_reset_all();
/* XXX: flush processor icache at this point if cache flush is expensive */
- qatomic_mb_set(&tb_ctx.tb_flush_count, tb_ctx.tb_flush_count + 1);
+ qatomic_inc(&tb_ctx.tb_flush_count);
done:
mmap_unlock();
void tb_flush(CPUState *cpu)
{
if (tcg_enabled()) {
- unsigned tb_flush_count = qatomic_mb_read(&tb_ctx.tb_flush_count);
+ unsigned tb_flush_count = qatomic_read(&tb_ctx.tb_flush_count);
if (cpu_in_exclusive_context(cpu)) {
do_tb_flush(cpu, RUN_ON_CPU_HOST_INT(tb_flush_count));