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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-04-02 11:04:05 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-05 23:19:54 -0700 |
| commit | 0b93bc9d1b0ca52d58a2015809b69ad188d0866c (patch) | |
| tree | 7a2191a2131f692c7b712d594d5d93c01d299766 /arch | |
| parent | 521c4dd4415ca24519468add60f6586fde913470 (diff) | |
| download | lwn-0b93bc9d1b0ca52d58a2015809b69ad188d0866c.tar.gz lwn-0b93bc9d1b0ca52d58a2015809b69ad188d0866c.zip | |
KVM: MMU: fix CR4.SMEP=1, CR0.WP=0 with shadow pages
commit 898761158be7682082955e3efa4ad24725305fc7 upstream.
smep_andnot_wp is initialized in kvm_init_shadow_mmu and shadow pages
should not be reused for different values of it. Thus, it has to be
added to the mask in kvm_mmu_pte_write.
Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index e14b1f8667bb..5a75ebf3d69f 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -3975,7 +3975,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, ++vcpu->kvm->stat.mmu_pte_write; kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE); - mask.cr0_wp = mask.cr4_pae = mask.nxe = 1; + mask.cr0_wp = mask.cr4_pae = mask.nxe = mask.smep_andnot_wp = 1; for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn) { if (detect_write_misaligned(sp, gpa, bytes) || detect_write_flooding(sp)) { |