This patch is a slightly improved version of a previously submitted patch. It
lets SVM ignore writes of the value 0 to the performance counter control
registers. Thus enabling them will still fail in the guest. This is required
to boot Windows Vista 64bit.
Signed-off-by: Joerg Roedel <[EMAIL PROTECTED]>
Signed-off-by: Markus Rechberger <[EMAIL PROTECTED]>
---
drivers/kvm/svm.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 9f8564a..f81b871 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -1155,6 +1155,17 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned
ecx, u64 data)
case MSR_IA32_SYSENTER_ESP:
svm->vmcb->save.sysenter_esp = data;
break;
+ case MSR_K7_EVNTSEL0:
+ case MSR_K7_EVNTSEL1:
+ case MSR_K7_EVNTSEL2:
+ case MSR_K7_EVNTSEL3:
+ /*
+ * only support writing 0 to the performance counters for now
+ * to make Windows happy. Should be replaced by a real
+ * performance counter emulation later.
+ */
+ if (data == 0)
+ break;
default:
return kvm_set_msr_common(vcpu, ecx, data);
}
--
1.5.2.5
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