diff options
| -rw-r--r-- | arch/x86/kvm/x86.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index bd8690ca7b6b..1153ce7d118b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -798,6 +798,7 @@ EXPORT_SYMBOL_GPL(pdptrs_changed); int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) { unsigned long old_cr0 = kvm_read_cr0(vcpu); + unsigned long pdptr_bits = X86_CR0_CD | X86_CR0_NW | X86_CR0_PG; unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; cr0 |= X86_CR0_ET; @@ -815,9 +816,9 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) return 1; - if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { + if (cr0 & X86_CR0_PG) { #ifdef CONFIG_X86_64 - if ((vcpu->arch.efer & EFER_LME)) { + if (!is_paging(vcpu) && (vcpu->arch.efer & EFER_LME)) { int cs_db, cs_l; if (!is_pae(vcpu)) @@ -827,8 +828,8 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) return 1; } else #endif - if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, - kvm_read_cr3(vcpu))) + if (is_pae(vcpu) && ((cr0 ^ old_cr0) & pdptr_bits) && + !load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu))) return 1; } |