Commit 0f127d12 authored by Lan Tianyu's avatar Lan Tianyu Committed by Paolo Bonzini
Browse files

KVM/x86: update the comment of memory barrier in the vcpu_enter_guest() 



The barrier also orders the write to mode from any reads
to the page tables done and so update the comment.

Signed-off-by: default avatarLan Tianyu <tianyu.lan@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 4ae3cb3a

arch/x86/kvm/x86.c

+6 −2
Original line number Diff line number Diff line
@@ -6596,8 +6596,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) 


	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);



	/* We should set ->mode before check ->requests,

	 * see the comment in make_all_cpus_request.

	/*

	 * We should set ->mode before check ->requests,

	 * Please see the comment in kvm_make_all_cpus_request.

	 * This also orders the write to mode from any reads

	 * to the page tables done while the VCPU is running.

	 * Please see the comment in kvm_flush_remote_tlbs.

	 */

	smp_mb__after_srcu_read_unlock();