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Subject[PATCH 11/19] KVM: VMX: Add ept_sync_context in flush_tlb
Date
From: Sheng Yang <sheng.yang@intel.com>

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@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/x86/kvm/vmx.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index ea6bcf5..d300aa1 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -91,6 +91,7 @@ static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
}

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);
@@ -1422,6 +1423,8 @@ static void exit_lmode(struct kvm_vcpu *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)
--
1.5.6.1


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