Commit e62f1aa8 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
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KVM: x86: Defer MMU sync on PCID invalidation 



Defer the MMU sync on PCID invalidation so that multiple sync requests in
a single VM-Exit are batched.  This is a very minor optimization as
checking for unsync'd children is quite cheap.

Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-Id: <20210609234235.1244004-13-seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 39353ab5

arch/x86/kvm/x86.c

+1 −1
Original line number Diff line number Diff line
@@ -1074,7 +1074,7 @@ static void kvm_invalidate_pcid(struct kvm_vcpu *vcpu, unsigned long pcid) 
	 * happen anyway before switching to any other CR3.

	 */

	if (kvm_get_active_pcid(vcpu) == pcid) {

		kvm_mmu_sync_roots(vcpu);

		kvm_make_request(KVM_REQ_MMU_SYNC, vcpu);

		kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu);

	}