From: Gleb Natapov <gleb@redhat.com>
Date: Wed, 14 Jul 2010 16:05:45 +0000 (+0300)
Subject: KVM: x86: never re-execute instruction with enabled tdp
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=68be0803456b3eed33038be5566710ad7648c854;p=linux-beck.git

KVM: x86: never re-execute instruction with enabled tdp

With tdp enabled we should get into emulator only when emulating io, so
reexecution will always bring us back into emulator.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index eb55ec55125c..689c2c3182ab 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3936,6 +3936,9 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
 {
 	gpa_t gpa;
 
+	if (tdp_enabled)
+		return false;
+
 	/*
 	 * if emulation was due to access to shadowed page table
 	 * and it failed try to unshadow page and re-entetr the