diff options
Diffstat (limited to 'target-i386/misc_helper.c')
| -rw-r--r-- | target-i386/misc_helper.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/target-i386/misc_helper.c b/target-i386/misc_helper.c index 93933fd162..b6307ca386 100644 --- a/target-i386/misc_helper.c +++ b/target-i386/misc_helper.c @@ -566,6 +566,15 @@ void helper_rdmsr(CPUX86State *env) } #endif +static void do_pause(X86CPU *cpu) +{ + CPUX86State *env = &cpu->env; + + /* Just let another CPU run. */ + env->exception_index = EXCP_INTERRUPT; + cpu_loop_exit(env); +} + static void do_hlt(X86CPU *cpu) { CPUState *cs = CPU(cpu); @@ -611,13 +620,22 @@ void helper_mwait(CPUX86State *env, int next_eip_addend) cs = CPU(cpu); /* XXX: not complete but not completely erroneous */ if (cs->cpu_index != 0 || CPU_NEXT(cs) != NULL) { - /* more than one CPU: do not sleep because another CPU may - wake this one */ + do_pause(cpu); } else { do_hlt(cpu); } } +void helper_pause(CPUX86State *env, int next_eip_addend) +{ + X86CPU *cpu = x86_env_get_cpu(env); + + cpu_svm_check_intercept_param(env, SVM_EXIT_PAUSE, 0); + env->eip += next_eip_addend; + + do_pause(cpu); +} + void helper_debug(CPUX86State *env) { env->exception_index = EXCP_DEBUG; |