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| author |   Jan Kiszka <jan.kiszka@siemens.com> | 2015-04-20 19:25:31 +0200 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2015-07-10 13:25:27 +0200 |
| commit | e098223b789b4a618dacd79e5e0dad4a9d5018d1 (patch) | |
| tree | 08c285a964a9eca5e97fdb78860007467e6f555b /arch/x86 | |
| parent | KVM: SVM: use NPT page attributes (diff) | |
| download | linux-dev-e098223b789b4a618dacd79e5e0dad4a9d5018d1.tar.xz linux-dev-e098223b789b4a618dacd79e5e0dad4a9d5018d1.zip | |
KVM: SVM: Sync g_pat with guest-written PAT value
When hardware supports the g_pat VMCB field, we can use it for emulating
the PAT configuration that the guest configures by writing to the
corresponding MSR.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Tested-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/svm.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 414ec25b673e..d36cfaf5a97a 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3350,6 +3350,16 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) case MSR_VM_IGNNE: vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data); break; + case MSR_IA32_CR_PAT: + if (npt_enabled) { + if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data)) + return 1; + vcpu->arch.pat = data; + svm_set_guest_pat(svm, &svm->vmcb->save.g_pat); + mark_dirty(svm->vmcb, VMCB_NPT); + break; + } + /* fall through */ default: return kvm_set_msr_common(vcpu, msr); } |