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-rw-r--r--target-i386/cpu.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 333309b9a7..0807e92600 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -258,6 +258,7 @@ typedef struct FeatureWordInfo {
int cpuid_reg; /* output register (R_* constant) */
uint32_t tcg_features; /* Feature flags supported by TCG */
uint32_t unmigratable_flags; /* Feature flags known to be unmigratable */
+ uint32_t migratable_flags; /* Feature flags known to be migratable */
} FeatureWordInfo;
static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
@@ -494,6 +495,10 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.cpuid_needs_ecx = true, .cpuid_ecx = 0,
.cpuid_reg = R_EAX,
.tcg_features = ~0U,
+ .migratable_flags = XSTATE_FP_MASK | XSTATE_SSE_MASK |
+ XSTATE_YMM_MASK | XSTATE_BNDREGS_MASK | XSTATE_BNDCSR_MASK |
+ XSTATE_OPMASK_MASK | XSTATE_ZMM_Hi256_MASK | XSTATE_Hi16_ZMM_MASK |
+ XSTATE_PKRU_MASK,
},
[FEAT_XSAVE_COMP_HI] = {
.cpuid_eax = 0xD,
@@ -600,15 +605,13 @@ static uint32_t x86_cpu_get_migratable_flags(FeatureWord w)
for (i = 0; i < 32; i++) {
uint32_t f = 1U << i;
- /* If the feature name is unknown, it is not supported by QEMU yet */
- if (!wi->feat_names[i]) {
- continue;
- }
- /* Skip features known to QEMU, but explicitly marked as unmigratable */
- if (wi->unmigratable_flags & f) {
- continue;
+
+ /* If the feature name is known, it is implicitly considered migratable,
+ * unless it is explicitly set in unmigratable_flags */
+ if ((wi->migratable_flags & f) ||
+ (wi->feat_names[i] && !(wi->unmigratable_flags & f))) {
+ r |= f;
}
- r |= f;
}
return r;
}