KVM: SVM: always set MSR_AMD64_TSC_RATIO to default value

[PATCH] KVM: SVM: always set MSR_AMD64_TSC_RATIO to default value

Maxim Levitsky posted 1 patch 2 years, 2 months ago

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git fetch https://github.com/patchew-project/qemu tags/patchew/20220223115824.319821-1-mlevitsk@redhat.com

target/i386/cpu.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

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[PATCH] KVM: SVM: always set MSR_AMD64_TSC_RATIO to default value

Posted by Maxim Levitsky 2 years, 2 months ago

Even when the feature is not supported in guest CPUID,
still set the msr to the default value which will
be the only value KVM will accept in this case

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 target/i386/cpu.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 6c7ef1099b..3475e9fa46 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5930,9 +5930,7 @@ static void x86_cpu_reset(DeviceState *dev)
 
     x86_cpu_set_sgxlepubkeyhash(env);
 
-    if (env->features[FEAT_SVM] & CPUID_SVM_TSCSCALE) {
-        env->amd_tsc_scale_msr =  MSR_AMD64_TSC_RATIO_DEFAULT;
-    }
+    env->amd_tsc_scale_msr =  MSR_AMD64_TSC_RATIO_DEFAULT;
 
 #endif
 }
-- 
2.26.3