From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752956AbdLHIlK (ORCPT ); Fri, 8 Dec 2017 03:41:10 -0500 Received: from mail-ot0-f194.google.com ([74.125.82.194]:39868 "EHLO mail-ot0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752413AbdLHIlI (ORCPT ); Fri, 8 Dec 2017 03:41:08 -0500 X-Google-Smtp-Source: AGs4zMZgsS6JM7mbS86124OsSLjPbKshTGWRek2TE5zT5l66s3hmnfM7A4+ZFn1DoduKrpG9jm4JrQ== From: Quan Xu X-Google-Original-From: Quan Xu To: pbonzini@redhat.com, rkrcmar@redhat.com Cc: yang.zhang.wz@gmail.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Ben Luo , Quan Xu Subject: [PATCH RFC 5/7] KVM: timer: ignore timer migration if pvtimer is enabled Date: Fri, 8 Dec 2017 16:39:48 +0800 Message-Id: <1512722390-3654-6-git-send-email-quan.xu0@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1512722390-3654-1-git-send-email-quan.xu0@gmail.com> References: <1512722390-3654-1-git-send-email-quan.xu0@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ben Luo When pvtimer is enabled, KVM programs timer to a dedicated CPU through IPI. Whether the vCPU is on the dedicated CPU or any other CPU, the timer interrupt will be delivered properly. No need to migrate timer. Signed-off-by: Yang Zhang Signed-off-by: Quan Xu Signed-off-by: Ben Luo --- arch/x86/kvm/lapic.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 5835a27..265efe6 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -2282,7 +2282,7 @@ void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) { struct hrtimer *timer; - if (!lapic_in_kernel(vcpu)) + if (!lapic_in_kernel(vcpu) || pv_timer_enabled(vcpu)) return; timer = &vcpu->arch.apic->lapic_timer.timer; -- 1.7.1