From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5C65ECDFB8 for ; Wed, 18 Jul 2018 11:30:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 744982075E for ; Wed, 18 Jul 2018 11:30:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 744982075E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730831AbeGRMHZ (ORCPT ); Wed, 18 Jul 2018 08:07:25 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:46340 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728520AbeGRMHZ (ORCPT ); Wed, 18 Jul 2018 08:07:25 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AAF647D84D; Wed, 18 Jul 2018 11:29:57 +0000 (UTC) Received: from [10.36.116.221] (ovpn-116-221.ams2.redhat.com [10.36.116.221]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C03B7111CD4C; Wed, 18 Jul 2018 11:29:54 +0000 (UTC) Subject: Re: [PATCH] KVM/MMU: Simplify __kvm_sync_page() function To: Tianyu Lan Cc: "rkrcmar@redhat.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "hpa@zytor.com" , "x86@kernel.org" , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <20180718061103.61920-1-Tianyu.Lan@microsoft.com> From: Paolo Bonzini Openpgp: preference=signencrypt Autocrypt: addr=pbonzini@redhat.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180718061103.61920-1-Tianyu.Lan@microsoft.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Wed, 18 Jul 2018 11:29:57 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Wed, 18 Jul 2018 11:29:57 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'pbonzini@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 18/07/2018 08:12, Tianyu Lan wrote: > Merge check of "sp->role.cr4_pae != !!is_pae(vcpu))" and "vcpu-> > arch.mmu.sync_page(vcpu, sp) == 0". kvm_mmu_prepare_zap_page() > is called under both these conditions. > > Signed-off-by: Lan Tianyu > --- > arch/x86/kvm/mmu.c | 8 ++------ > 1 file changed, 2 insertions(+), 6 deletions(-) > > diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c > index d594690d8b95..c2c1fd66fb36 100644 > --- a/arch/x86/kvm/mmu.c > +++ b/arch/x86/kvm/mmu.c > @@ -2117,12 +2117,8 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm, > static bool __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, > struct list_head *invalid_list) > { > - if (sp->role.cr4_pae != !!is_pae(vcpu)) { > - kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list); > - return false; > - } > - > - if (vcpu->arch.mmu.sync_page(vcpu, sp) == 0) { > + if (sp->role.cr4_pae != !!is_pae(vcpu) > + || vcpu->arch.mmu.sync_page(vcpu, sp) == 0) { > kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list); > return false; > } > Queued, thanks. Paolo