diff options
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d36cfaf5a97a..bbc678a66b18 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1166,14 +1166,11 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) u8 mtrr; /* - * 1. MMIO: always map as UC + * 1. MMIO: trust guest MTRR, so same as item 3. * 2. No passthrough: always map as WB, and force guest PAT to WB as well * 3. Passthrough: can't guarantee the result, try to trust guest. */ - if (is_mmio) - return _PAGE_NOCACHE; - - if (!kvm_arch_has_assigned_device(vcpu->kvm)) + if (!is_mmio && !kvm_arch_has_assigned_device(vcpu->kvm)) return 0; mtrr = kvm_mtrr_get_guest_memory_type(vcpu, gfn); |