From patchwork Wed Jan 5 09:38:13 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 453011 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p059ckDL031849 for ; Wed, 5 Jan 2011 09:38:46 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751711Ab1AEJiM (ORCPT ); Wed, 5 Jan 2011 04:38:12 -0500 Received: from cn.fujitsu.com ([222.73.24.84]:55193 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751514Ab1AEJiK (ORCPT ); Wed, 5 Jan 2011 04:38:10 -0500 Received: from tang.cn.fujitsu.com (tang.cn.fujitsu.com [10.167.250.3]) by song.cn.fujitsu.com (Postfix) with ESMTP id 83A54170420; Wed, 5 Jan 2011 17:38:09 +0800 (CST) Received: from mailserver.fnst.cn.fujitus.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id p059X4GH012392; Wed, 5 Jan 2011 17:33:04 +0800 Received: from eric.localdomain ([10.167.225.99]) by mailserver.fnst.cn.fujitus.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2011010517374985-99150 ; Wed, 5 Jan 2011 17:37:49 +0800 Message-ID: <4D243C05.7060307@cn.fujitsu.com> Date: Wed, 05 Jan 2011 17:38:13 +0800 From: Xiao Guangrong User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Thunderbird/3.1.7 MIME-Version: 1.0 To: Avi Kivity CC: Marcelo Tosatti , LKML , KVM Subject: [PATCH 2/3] KVM: send IPI to vcpu only when it's in guest mode References: <4D243B95.3070203@cn.fujitsu.com> In-Reply-To: <4D243B95.3070203@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-01-05 17:37:49, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-01-05 17:37:50, Serialize complete at 2011-01-05 17:37:50 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Wed, 05 Jan 2011 09:38:47 +0000 (UTC) diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 70d224d..15c11b2 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -662,6 +662,7 @@ again: goto vcpu_run_fail; srcu_read_unlock(&vcpu->kvm->srcu, idx); + atomic_set(&vcpu->guest_mode, 1); kvm_guest_enter(); /* @@ -683,6 +684,7 @@ again: */ barrier(); kvm_guest_exit(); + atomic_set(&vcpu->guest_mode, 0); preempt_enable(); idx = srcu_read_lock(&vcpu->kvm->srcu); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index b1b6cbb..6648c6e 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -153,7 +153,8 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) if (kvm_make_check_request(req, vcpu)) continue; cpu = vcpu->cpu; - if (cpus != NULL && cpu != -1 && cpu != me) + if (cpus != NULL && cpu != -1 && cpu != me && + atomic_read(&vcpu->guest_mode)) cpumask_set_cpu(cpu, cpus); } if (unlikely(cpus == NULL))