KVM: MMU: Allow 4K ptes with bit 7 (PAT) set

Bit 7 is perfectly legal in the 4K page leve; it is used for the PAT.

Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5c3d6e8..7030b5f 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2157,7 +2157,7 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int level)
                else
                        /* 32 bits PSE 4MB page */
                        context->rsvd_bits_mask[1][1] = rsvd_bits(13, 21);
-               context->rsvd_bits_mask[1][0] = ~0ull;
+               context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[1][0];
                break;
        case PT32E_ROOT_LEVEL:
                context->rsvd_bits_mask[0][2] =
@@ -2170,7 +2170,7 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int level)
                context->rsvd_bits_mask[1][1] = exb_bit_rsvd |
                        rsvd_bits(maxphyaddr, 62) |
                        rsvd_bits(13, 20);              /* large page */
-               context->rsvd_bits_mask[1][0] = ~0ull;
+               context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[1][0];
                break;
        case PT64_ROOT_LEVEL:
                context->rsvd_bits_mask[0][3] = exb_bit_rsvd |
@@ -2186,7 +2186,7 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int level)
                context->rsvd_bits_mask[1][1] = exb_bit_rsvd |
                        rsvd_bits(maxphyaddr, 51) |
                        rsvd_bits(13, 20);              /* large page */
-               context->rsvd_bits_mask[1][0] = ~0ull;
+               context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[1][0];
                break;
        }
 }