diff options
Diffstat (limited to 'target/i386/cpu.c')
| -rw-r--r-- | target/i386/cpu.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index e6c2f8a22a..1e6a7d0a75 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -3959,11 +3959,11 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, } break; case 5: - /* mwait info: needed for Core compatibility */ - *eax = 0; /* Smallest monitor-line size in bytes */ - *ebx = 0; /* Largest monitor-line size in bytes */ - *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE; - *edx = 0; + /* MONITOR/MWAIT Leaf */ + *eax = cpu->mwait.eax; /* Smallest monitor-line size in bytes */ + *ebx = cpu->mwait.ebx; /* Largest monitor-line size in bytes */ + *ecx = cpu->mwait.ecx; /* flags */ + *edx = cpu->mwait.edx; /* mwait substates */ break; case 6: /* Thermal and Power Leaf */ @@ -4804,13 +4804,25 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) Error *local_err = NULL; static bool ht_warned; - if (xcc->host_cpuid_required && !accel_uses_host_cpuid()) { - char *name = x86_cpu_class_get_model_name(xcc); - error_setg(&local_err, "CPU model '%s' requires KVM", name); - g_free(name); - goto out; + if (xcc->host_cpuid_required) { + if (!accel_uses_host_cpuid()) { + char *name = x86_cpu_class_get_model_name(xcc); + error_setg(&local_err, "CPU model '%s' requires KVM", name); + g_free(name); + goto out; + } + + if (enable_cpu_pm) { + host_cpuid(5, 0, &cpu->mwait.eax, &cpu->mwait.ebx, + &cpu->mwait.ecx, &cpu->mwait.edx); + env->features[FEAT_1_ECX] |= CPUID_EXT_MONITOR; + } } + /* mwait extended info: needed for Core compatibility */ + /* We always wake on interrupt even if host does not have the capability */ + cpu->mwait.ecx |= CPUID_MWAIT_EMX | CPUID_MWAIT_IBE; + if (cpu->apic_id == UNASSIGNED_APIC_ID) { error_setg(errp, "apic-id property was not initialized properly"); return; |