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authorAmit Shah <amit.shah@redhat.com>2015-09-23 11:57:33 +0530
committerEduardo Habkost <ehabkost@redhat.com>2015-10-02 16:22:01 -0300
commitc9b8f6b6210847b4381c5b2ee172b1c7eb9985d6 (patch)
tree4f8dab54d914abe67e2bc18e6e64f4892e822303
parentdd941cdcfec536aad6a310a153778142ed9f3e92 (diff)
target-i386: get/put MSR_TSC_AUX across reset and migration
There's one report of migration breaking due to missing MSR_TSC_AUX save/restore. Fix this by adding a new subsection that saves the state of this MSR. https://bugzilla.redhat.com/show_bug.cgi?id=1261797 Reported-by: Xiaoqing Wei <xwei@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Juan Quintela <quintela@redhat.com> CC: "Dr. David Alan Gilbert" <dgilbert@redhat.com> CC: Marcelo Tosatti <mtosatti@redhat.com> CC: Richard Henderson <rth@twiddle.net> CC: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
-rw-r--r--target-i386/kvm.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 7b0ba179cc..80d1a7e01e 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -67,6 +67,7 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
static bool has_msr_star;
static bool has_msr_hsave_pa;
+static bool has_msr_tsc_aux;
static bool has_msr_tsc_adjust;
static bool has_msr_tsc_deadline;
static bool has_msr_feature_control;
@@ -825,6 +826,10 @@ static int kvm_get_supported_msrs(KVMState *s)
has_msr_hsave_pa = true;
continue;
}
+ if (kvm_msr_list->indices[i] == MSR_TSC_AUX) {
+ has_msr_tsc_aux = true;
+ continue;
+ }
if (kvm_msr_list->indices[i] == MSR_TSC_ADJUST) {
has_msr_tsc_adjust = true;
continue;
@@ -1299,6 +1304,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
if (has_msr_hsave_pa) {
kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave);
}
+ if (has_msr_tsc_aux) {
+ kvm_msr_entry_set(&msrs[n++], MSR_TSC_AUX, env->tsc_aux);
+ }
if (has_msr_tsc_adjust) {
kvm_msr_entry_set(&msrs[n++], MSR_TSC_ADJUST, env->tsc_adjust);
}
@@ -1671,6 +1679,9 @@ static int kvm_get_msrs(X86CPU *cpu)
if (has_msr_hsave_pa) {
msrs[n++].index = MSR_VM_HSAVE_PA;
}
+ if (has_msr_tsc_aux) {
+ msrs[n++].index = MSR_TSC_AUX;
+ }
if (has_msr_tsc_adjust) {
msrs[n++].index = MSR_TSC_ADJUST;
}
@@ -1820,6 +1831,9 @@ static int kvm_get_msrs(X86CPU *cpu)
case MSR_IA32_TSC:
env->tsc = msrs[i].data;
break;
+ case MSR_TSC_AUX:
+ env->tsc_aux = msrs[i].data;
+ break;
case MSR_TSC_ADJUST:
env->tsc_adjust = msrs[i].data;
break;