diff options
| -rw-r--r-- | target/i386/cpu.c | 4 | ||||
| -rw-r--r-- | target/i386/cpu.h | 2 | ||||
| -rw-r--r-- | target/i386/kvm/kvm-cpu.c | 19 |
3 files changed, 16 insertions, 9 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index a88d6554c8..ec3b50bf6e 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -4981,8 +4981,8 @@ CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp) return cpu_list; } -static uint64_t x86_cpu_get_supported_feature_word(FeatureWord w, - bool migratable_only) +uint64_t x86_cpu_get_supported_feature_word(FeatureWord w, + bool migratable_only) { FeatureWordInfo *wi = &feature_word_info[w]; uint64_t r = 0; diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 5e406088a9..e31e6bd8b8 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -606,6 +606,8 @@ typedef enum FeatureWord { } FeatureWord; typedef uint64_t FeatureWordArray[FEATURE_WORDS]; +uint64_t x86_cpu_get_supported_feature_word(FeatureWord w, + bool migratable_only); /* cpuid_features bits */ #define CPUID_FP87 (1U << 0) diff --git a/target/i386/kvm/kvm-cpu.c b/target/i386/kvm/kvm-cpu.c index a35a1bf9fe..5eb955ce9a 100644 --- a/target/i386/kvm/kvm-cpu.c +++ b/target/i386/kvm/kvm-cpu.c @@ -99,13 +99,18 @@ static void kvm_cpu_xsave_init(void) for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) { ExtSaveArea *esa = &x86_ext_save_areas[i]; - if (esa->size) { - host_cpuid(0xd, i, &eax, &ebx, &ecx, &edx); - if (eax != 0) { - assert(esa->size == eax); - esa->offset = ebx; - esa->ecx = ecx; - } + if (!esa->size) { + continue; + } + if ((x86_cpu_get_supported_feature_word(esa->feature, false) & esa->bits) + != esa->bits) { + continue; + } + host_cpuid(0xd, i, &eax, &ebx, &ecx, &edx); + if (eax != 0) { + assert(esa->size == eax); + esa->offset = ebx; + esa->ecx = ecx; } } } |