> for better or worse, KVM doesn't apply the "zap > SPTEs" logic to guest PAT changes when the VM has a passthrough device > with non-coherent DMA. Is it a bug? > > Signed-off-by: Ke Guo <guoke@xxxxxxxxxxxxx> > [sean: massage changelog] > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> > --- > arch/x86/kvm/svm/svm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c > index eb308c9994f9..db237ccdc957 100644 > --- a/arch/x86/kvm/svm/svm.c > +++ b/arch/x86/kvm/svm/svm.c > @@ -2935,7 +2935,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) > > break; > case MSR_IA32_CR_PAT: > - if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data)) > + if (!kvm_pat_valid(data)) > return 1; > vcpu->arch.pat = data; > svm->vmcb01.ptr->save.g_pat = data; Anyway for this change, Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx>
