diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2007-12-11 15:36:57 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-12-11 16:51:06 +0200 |
| commit | 51ef1ac7b23ee32bfcc61c229d634fdc1c68b38a (patch) | |
| tree | 0b2801d5e85b5f7426a1604e6aa9023cc054b38d | |
| parent | ced316df1d44ed441d6268e13500fef2b7ad9bfb (diff) | |
KVM: SVM: support writing 0 to K8 performance counter control registerskvm-56rc1
This lets SVM ignore writes of the value 0 to the performance counter control
registers. Thus enabling them will still fail in the guest, but a write of 0
which keeps them disabled is accepted. This is required to boot Windows
Vista 64bit.
[avi: avoid fall-thru in switch statement]
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/svm.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 9f8564a6a12f..839a75fb8794 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -1155,7 +1155,20 @@ 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) + goto unhandled; + break; default: + unhandled: return kvm_set_msr_common(vcpu, ecx, data); } return 0; |