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| author | Junaid Shahid <junaids@google.com> | 2018-08-08 17:45:24 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-09-20 00:26:43 +0200 |
| commit | d35b34a9a70edae7ef923f100e51b8b5ae9fe899 (patch) | |
| tree | d650446ae38c7f5840a6a2155ec6d353849f3947 /arch/x86/kvm/x86.c | |
| parent | d1766202779e81d0f2a94c4650a6ba31497d369d (diff) | |
| download | lwn-d35b34a9a70edae7ef923f100e51b8b5ae9fe899.tar.gz lwn-d35b34a9a70edae7ef923f100e51b8b5ae9fe899.zip | |
kvm: mmu: Don't read PDPTEs when paging is not enabled
kvm should not attempt to read guest PDPTEs when CR0.PG = 0 and
CR4.PAE = 1.
Signed-off-by: Junaid Shahid <junaids@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 542f6315444d..5c870203737f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -628,7 +628,7 @@ bool pdptrs_changed(struct kvm_vcpu *vcpu) gfn_t gfn; int r; - if (is_long_mode(vcpu) || !is_pae(vcpu)) + if (is_long_mode(vcpu) || !is_pae(vcpu) || !is_paging(vcpu)) return false; if (!test_bit(VCPU_EXREG_PDPTR, @@ -8177,7 +8177,7 @@ static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) kvm_update_cpuid(vcpu); idx = srcu_read_lock(&vcpu->kvm->srcu); - if (!is_long_mode(vcpu) && is_pae(vcpu)) { + if (!is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu)) { load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); mmu_reset_needed = 1; } |