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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>
This commit is contained in:
Jim Mattson 2017-03-15 07:56:11 -07:00 committed by Radim Krčmář
parent 715958f921
commit f0b98c02c1
1 changed files with 2 additions and 1 deletions
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3
arch/x86/kvm/vmx.c
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@ -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);
}
}