Messages in this thread Patch in this message | | | Subject | [PATCH] KVM: VMX: call invvpid only when EPT is disabled | From | Davidlohr Bueso <> | Date | Thu, 15 Mar 2012 02:44:44 +0100 |
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From: Davidlohr Bueso <dave@gnu.org>
With EPT enabled it is not required to explicitly run invvpid to invalidate tagged TLB entries, as KVM does not force vm-exits for cr3 writes and invlpg. Run invvpid only when these instructions are emulated and shadow pages are used.
Signed-off-by: Davidlohr Bueso <dave@gnu.org> --- arch/x86/kvm/vmx.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 2c22fc7..51c7fb9 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2861,12 +2861,13 @@ static void exit_lmode(struct kvm_vcpu *vcpu) static void vmx_flush_tlb(struct kvm_vcpu *vcpu) { - vpid_sync_context(to_vmx(vcpu)); if (enable_ept) { if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) return; ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); } + else + vpid_sync_context(to_vmx(vcpu)); } static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) -- 1.7.4.1
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