diff options
| -rw-r--r-- | cpu-exec.c | 5 | ||||
| -rw-r--r-- | qemu-barrier.h | 3 |
2 files changed, 6 insertions, 2 deletions
diff --git a/cpu-exec.c b/cpu-exec.c index 026980a552..525b3b45ee 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -21,6 +21,7 @@ #include "disas.h" #include "tcg.h" #include "kvm.h" +#include "qemu-barrier.h" #if !defined(CONFIG_SOFTMMU) #undef EAX @@ -233,7 +234,7 @@ int cpu_exec(CPUState *env1) use it. */ QEMU_BUILD_BUG_ON (sizeof (saved_env_reg) != sizeof (env)); saved_env_reg = (host_reg_t) env; - asm(""); + barrier(); env = env1; if (exit_request) { @@ -669,7 +670,7 @@ int cpu_exec(CPUState *env1) #endif /* restore global registers */ - asm(""); + barrier(); env = (void *) saved_env_reg; /* fail safe : never use cpu_single_env outside cpu_exec() */ diff --git a/qemu-barrier.h b/qemu-barrier.h index 3bd1075d66..b77fce23a9 100644 --- a/qemu-barrier.h +++ b/qemu-barrier.h @@ -4,4 +4,7 @@ /* FIXME: arch dependant, x86 version */ #define smp_wmb() asm volatile("" ::: "memory") +/* Compiler barrier */ +#define barrier() asm volatile("" ::: "memory") + #endif |