From d9f89b88f5102ce235b75a5907838e3c7ed84b97 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Sat, 10 May 2014 09:24:34 +0200 Subject: [PATCH] KVM: x86: Fix CR3 reserved bits check in long mode Regression of 346874c9: PAE is set in long mode, but that does not mean we have valid PDPTRs. Signed-off-by: Jan Kiszka Signed-off-by: Paolo Bonzini --- arch/x86/kvm/x86.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 41f673facf2f..fb313fc896dd 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -701,10 +701,11 @@ int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) return 0; } - if (is_long_mode(vcpu) && (cr3 & CR3_L_MODE_RESERVED_BITS)) - return 1; - if (is_pae(vcpu) && is_paging(vcpu) && - !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) + if (is_long_mode(vcpu)) { + if (cr3 & CR3_L_MODE_RESERVED_BITS) + return 1; + } else if (is_pae(vcpu) && is_paging(vcpu) && + !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) return 1; vcpu->arch.cr3 = cr3; -- 2.20.1