target-i386: Move kvm_check_features_against_host() check to realize time

kvm_check_features_against_host() should be called when features can't
be changed, and when features are converted to properties it would be
possible to change them until realize time, so correct way is to call
kvm_check_features_against_host() in x86_cpu_realize().

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 3a68470f53f026b13641059c0bd72c64d3507e9e..333745b45643b4d5cd3e8e24a78bd129a6c63156 100644 (file)
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1022,27 +1022,28 @@ static int unavailable_host_feature(FeatureWordInfo *f, uint32_t mask)
  *
  * This function may be called only if KVM is enabled.
  */
-static int kvm_check_features_against_host(x86_def_t *guest_def)
+static int kvm_check_features_against_host(X86CPU *cpu)
 {
+    CPUX86State *env = &cpu->env;
     x86_def_t host_def;
     uint32_t mask;
     int rv, i;
     struct model_features_t ft[] = {
-        {&guest_def->features, &host_def.features,
+        {&env->cpuid_features, &host_def.features,
             FEAT_1_EDX },
-        {&guest_def->ext_features, &host_def.ext_features,
+        {&env->cpuid_ext_features, &host_def.ext_features,
             FEAT_1_ECX },
-        {&guest_def->ext2_features, &host_def.ext2_features,
+        {&env->cpuid_ext2_features, &host_def.ext2_features,
             FEAT_8000_0001_EDX },
-        {&guest_def->ext3_features, &host_def.ext3_features,
+        {&env->cpuid_ext3_features, &host_def.ext3_features,
             FEAT_8000_0001_ECX },
-        {&guest_def->ext4_features, &host_def.ext4_features,
+        {&env->cpuid_ext4_features, &host_def.ext4_features,
             FEAT_C000_0001_EDX },
-        {&guest_def->cpuid_7_0_ebx_features, &host_def.cpuid_7_0_ebx_features,
+        {&env->cpuid_7_0_ebx_features, &host_def.cpuid_7_0_ebx_features,
             FEAT_7_0_EBX },
-        {&guest_def->svm_features, &host_def.svm_features,
+        {&env->cpuid_svm_features, &host_def.svm_features,
             FEAT_SVM },
-        {&guest_def->kvm_features, &host_def.kvm_features,
+        {&env->cpuid_kvm_features, &host_def.kvm_features,
             FEAT_KVM },
     };
 
@@ -1471,10 +1472,6 @@ static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
     x86_cpu_def->kvm_features &= ~minus_features[FEAT_KVM];
     x86_cpu_def->svm_features &= ~minus_features[FEAT_SVM];
     x86_cpu_def->cpuid_7_0_ebx_features &= ~minus_features[FEAT_7_0_EBX];
-    if (check_cpuid && kvm_enabled()) {
-        if (kvm_check_features_against_host(x86_cpu_def) && enforce_cpuid)
-            goto error;
-    }
     return 0;
 
 error:
@@ -2177,6 +2174,11 @@ void x86_cpu_realize(Object *obj, Error **errp)
 #ifdef CONFIG_KVM
         filter_features_for_kvm(cpu);
 #endif
+        if (check_cpuid && kvm_check_features_against_host(cpu)
+            && enforce_cpuid) {
+            error_setg(errp, "Host's CPU doesn't support requested features");
+            return;
+        }
     }
 
 #ifndef CONFIG_USER_ONLY