From: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
We regularly see bug reports over this one, however it is a write to
a read-only register which some operating systems (including Linux)
tend to write to once in a while.
Ignore the writes since they do no harm.
Signed-off-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
---
arch/x86/kvm/x86.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4014d6c..2e1ae7f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1439,6 +1439,12 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
"0x%x data 0x%llx\n", msr, data);
break;
+ case MSR_IA32_PERF_STATUS:
+ /*
+ * Write to read-only register, has no effect, so
+ * lets not bother users with a warning about this.
+ */
+ break;
case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
if (kvm_hv_msr_partition_wide(msr)) {
int r;
--
1.7.1
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