diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-06-22 10:57:37 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-24 18:00:47 -0400 |
| commit | fdaa293598f908adb945001dabb305225144e183 (patch) | |
| tree | b12ff32bef0ae8548334e55203f436de8c3a7fd2 /arch/x86/kvm/mmu | |
| parent | f82fdaf536ee6de36e3a7b4764f17b81afb8ef93 (diff) | |
KVM: x86/mmu: Get CR0.WP from MMU, not vCPU, in shadow page fault
Use the current MMU instead of vCPU state to query CR0.WP when handling
a page fault. In the nested NPT case, the current CR0.WP reflects L2,
whereas the page fault is shadowing L1's NPT. Practically speaking, this
is a nop a NPT walks are always user faults, but fix it up for
consistency.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-53-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu')
| -rw-r--r-- | arch/x86/kvm/mmu/paging_tmpl.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index 75c3fe966e81..2f5a0e8d05ed 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -795,7 +795,7 @@ FNAME(is_self_change_mapping)(struct kvm_vcpu *vcpu, bool self_changed = false; if (!(walker->pte_access & ACC_WRITE_MASK || - (!is_write_protection(vcpu) && !user_fault))) + (!is_cr0_wp(vcpu->arch.mmu) && !user_fault))) return false; for (level = walker->level; level <= walker->max_level; level++) { @@ -893,8 +893,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gpa_t addr, u32 error_code, * we will cache the incorrect access into mmio spte. */ if (write_fault && !(walker.pte_access & ACC_WRITE_MASK) && - !is_write_protection(vcpu) && !user_fault && - !is_noslot_pfn(pfn)) { + !is_cr0_wp(vcpu->arch.mmu) && !user_fault && !is_noslot_pfn(pfn)) { walker.pte_access |= ACC_WRITE_MASK; walker.pte_access &= ~ACC_USER_MASK; |