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@xxxxxxxxxxx> --- RFC because it is only compile-tested. arch/x86/kvm/svm.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index ce741b8..9439c6c 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3245,6 +3245,15 @@ 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; + svm->vmcb->save.g_pat = data; + vcpu->arch.pat = data; + break; + } + /* fall through */ default: return kvm_set_msr_common(vcpu, msr); } -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html