Commit f0b98c02 authored Mar 15, 2017 by Jim Mattson Committed by Radim Krčmář Apr 07, 2017

kvm: vmx: Don't use INVVPID when EPT is enabled



According to the Intel SDM, volume 3, section 28.3.2: Creating and
Using Cached Translation Information, "No linear mappings are used
while EPT is in use." INVEPT will invalidate both the guest-physical
mappings and the combined mappings in the TLBs and paging-structure
caches, so an INVVPID is superfluous.

Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

parent 715958f9

arch/x86/kvm/vmx.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -4017,11 +4017,12 @@ static void exit_lmode(struct kvm_vcpu *vcpu)

		static inline void __vmx_flush_tlb(struct kvm_vcpu *vcpu, int vpid)
		{
		vpid_sync_context(vpid);
		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(vpid);
		}
		}