From 20f708523e1c617e8c57a77d9d61811f8febccd1 Mon Sep 17 00:00:00 2001
From: Eduardo Habkost <ehabkost@redhat.com>
Date: Mon, 5 Oct 2009 14:32:46 -0300
Subject: [PATCH 5/6] KVM: VMX: flush TLB with INVEPT on cpu migration

RH-Author: Marcelo Tosatti <mtosatti@redhat.com>
Message-id: <20091001235239.GA26284@amt.cnet>
Patchwork-id: 3552
O-Subject: [PATCH RHEL 5.4.z] KVM: VMX: flush TLB with INVEPT on cpu migration
Bugzilla: 518081
RH-Acked-by: Juan Quintela <quintela@redhat.com>
RH-Acked-by: Avi Kivity <avi@redhat.com>
RH-Acked-by: Gleb Natapov <gleb@redhat.com>

It is possible that stale EPTP-tagged mappings are used, if a
vcpu migrates to a different pcpu.

Set KVM_REQ_TLB_FLUSH in vmx_vcpu_load, when switching pcpus, which
will invalidate both VPID and EPT mappings on the next vm-entry.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
(cherry picked from commit 083e9e10dd99629b52e2cfad7eeb4fb6d7511d15)
Bugzilla: 518081

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 arch/x86/kvm/vmx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 445f0d0..dd61bbb 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -640,7 +640,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 	if (vcpu->cpu != cpu) {
 		vcpu_clear(vmx);
 		kvm_migrate_timers(vcpu);
-		vpid_sync_vcpu_all(vmx);
+		set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 		local_irq_disable();
 		list_add(&vmx->local_vcpus_link,
 			 &per_cpu(vcpus_on_cpu, cpu));
-- 
1.6.3.rc4.29.g8146