From ee8deee7d39e85db5e9962423ed488a9b2d5c6d4 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Mon, 2 Sep 2013 15:25:28 +0300 Subject: [PATCH] KVM: nEPT: reset PDPTR register cache on nested vmentry emulation After nested vmentry stale cache can be used to reload L2 PDPTR pointers which will cause L2 guest to fail. Fix it by invalidating cache on nested vmentry emulation. https://bugzilla.kernel.org/show_bug.cgi?id=60830 Signed-off-by: Gleb Natapov Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 1f1da43ff2a2c..48735936860cc 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7766,6 +7766,10 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1); vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2); vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3); + __clear_bit(VCPU_EXREG_PDPTR, + (unsigned long *)&vcpu->arch.regs_avail); + __clear_bit(VCPU_EXREG_PDPTR, + (unsigned long *)&vcpu->arch.regs_dirty); } kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp); -- 2.39.5