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authorPaolo Bonzini <pbonzini@redhat.com>2021-11-22 13:01:37 -0500
committerPaolo Bonzini <pbonzini@redhat.com>2021-11-30 03:09:26 -0500
commit28f091bc2f8c23b7eac2402956b692621be7f9f4 (patch)
tree4dc5d9c7f1f4b6f33ba0401fa2dcc3f1129ccd4b /arch
parent4b85c921cd393764d22c0cdab6d7d5d120aa0980 (diff)
KVM: MMU: shadow nested paging does not have PKU
Initialize the mask for PKU permissions as if CR4.PKE=0, avoiding incorrect interpretations of the nested hypervisor's page tables. Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/mmu/mmu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 1b3a7cc9d595..0e017a3b7c27 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4855,7 +4855,7 @@ void kvm_init_shadow_npt_mmu(struct kvm_vcpu *vcpu, unsigned long cr0,
struct kvm_mmu *context = &vcpu->arch.guest_mmu;
struct kvm_mmu_role_regs regs = {
.cr0 = cr0,
- .cr4 = cr4,
+ .cr4 = cr4 & ~X86_CR4_PKE,
.efer = efer,
};
union kvm_mmu_role new_role;
@@ -4919,7 +4919,7 @@ void kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, bool execonly,
context->direct_map = false;
update_permission_bitmask(context, true);
- update_pkru_bitmask(context);
+ context->pkru_mask = 0;
reset_rsvds_bits_mask_ept(vcpu, context, execonly);
reset_ept_shadow_zero_bits_mask(vcpu, context, execonly);
}