[patch 11/62] KVM: VMX: Add ept_sync_context in flush_tlb

[Greg KH]

2.6.26 -stable review patch.  If anyone has any objections, please let
us know.

------------------
From: Sheng Yang <sheng.yang@xxxxxxxxx>

Original-Commit-Hash: 73f785350b92e1a3af945340f7d10f3978193cba

Fix a potention issue caused by kvm_mmu_slot_remove_write_access(). The
old behavior don't sync EPT TLB with modified EPT entry, which result
in inconsistent content of EPT TLB and EPT table.

Signed-off-by: Sheng Yang <sheng.yang@xxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>


---
 arch/x86/kvm/vmx.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -88,6 +88,7 @@ static inline struct vcpu_vmx *to_vmx(st
 }
 
 static int init_rmode(struct kvm *kvm);
+static u64 construct_eptp(unsigned long root_hpa);
 
 static DEFINE_PER_CPU(struct vmcs *, vmxarea);
 static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
@@ -1389,6 +1390,8 @@ static void exit_lmode(struct kvm_vcpu *
 static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
 {
 	vpid_sync_vcpu_all(to_vmx(vcpu));
+	if (vm_need_ept())
+		ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
 }
 
 static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)

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