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=-17.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 C93B2C43460 for ; Thu, 1 Apr 2021 18:38:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A2FCE60724 for ; Thu, 1 Apr 2021 18:38:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238263AbhDASiJ (ORCPT ); Thu, 1 Apr 2021 14:38:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:21190 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236594AbhDASca (ORCPT ); Thu, 1 Apr 2021 14:32:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617301948; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XtDBz7ykDKRMTtDTrLTSXxwTFQJuBtQJjv1Xfg77ytQ=; b=DbVbwlGxtlcXFEDQwfSp9D2ehX1VaZymkxxa2q2jMFHWLcv0IMhKQrITwH3JFKeigx+zag nwTNW/rofzNssjOlyxc07GgSWr4pYH6KkuzT8h4DWLi8E7rPo6pHF+yb8vYvZNoPdY0ElY kctuDRS6b59oYGWrsLbVaBT8vsxBRFE= Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-202-HzpGK0TzPkeaJBIi486F7w-1; Thu, 01 Apr 2021 10:31:44 -0400 X-MC-Unique: HzpGK0TzPkeaJBIi486F7w-1 Received: by mail-ed1-f70.google.com with SMTP id v27so2942368edx.1 for ; Thu, 01 Apr 2021 07:31:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=XtDBz7ykDKRMTtDTrLTSXxwTFQJuBtQJjv1Xfg77ytQ=; b=Eug/W+g7PdctCRCITYaz2ie4S31laTmgCQDFwJXx60KcygYG9pvUovXIGxQcuhU01K 0uxwhxMTN/LNrM43hAldF8Dzdy/0qj55lQgkt2uTjOi7/mvX5hbbc9JI7Q1s2YAkJDJd SIQRyTMN0h5KPneXIvTZsgiL3ouR+VmazG5RswTxbLWRPqgkN5Yf+jxyXtHQUsPLW6C2 FgrKln0RwMhxI3ecvqKgyWMSHdeMzdVXHKuXV3hSv7b3FQKJKwaI6pRYEdl3uDeDBpGX 9LbWePcDyEg5Bg8b9+Ch6eyeY4jXvK5bDqRCN2w5am8MiqejfbP5HYIksppEXMpbsE+w 0gCA== X-Gm-Message-State: AOAM5311yqlRLTJNuyiXtiij8M5p04GAywccEZKf6H7jHyGiDiK1dcqK na4c++1zHcu0FRjShpSP/pFbpHWJs2JCA/rFLEigpmgMGj7q1RRsPZjBdnjS3G795INzeAe9+44 w3iWOv0m7wHKP/SqQYxbxMgrjOjyvkDXXxjvRYzISP5afxOB4PPJESSmSQcVRbESpv04yrCrS X-Received: by 2002:a50:fe08:: with SMTP id f8mr10085914edt.217.1617287501468; Thu, 01 Apr 2021 07:31:41 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzrkplglsUx4FWy5ZDzoNBFaTl9LRJrAQoJMJg7M+SOTlXx6lpwIPeSi7qSlRenq6FjNWqKjg== X-Received: by 2002:a50:fe08:: with SMTP id f8mr10085877edt.217.1617287501236; Thu, 01 Apr 2021 07:31:41 -0700 (PDT) Received: from ?IPv6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id nd36sm2840882ejc.21.2021.04.01.07.31.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 Apr 2021 07:31:40 -0700 (PDT) Subject: Re: [PATCH 3/6] KVM: x86: introduce kvm_register_clear_available To: Maxim Levitsky , kvm@vger.kernel.org Cc: "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Jim Mattson , Vitaly Kuznetsov , Wanpeng Li , Sean Christopherson , Joerg Roedel , "H. Peter Anvin" , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Thomas Gleixner , Jonathan Corbet , Borislav Petkov , Ingo Molnar , "open list:DOCUMENTATION" References: <20210401141814.1029036-1-mlevitsk@redhat.com> <20210401141814.1029036-4-mlevitsk@redhat.com> From: Paolo Bonzini Message-ID: <75dc7aba-fc9e-8217-e120-9c6ef3a601c8@redhat.com> Date: Thu, 1 Apr 2021 16:31:39 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210401141814.1029036-4-mlevitsk@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On 01/04/21 16:18, Maxim Levitsky wrote: > Small refactoring that will be used in the next patch. > > Signed-off-by: Maxim Levitsky > --- > arch/x86/kvm/kvm_cache_regs.h | 7 +++++++ > arch/x86/kvm/svm/svm.c | 6 ++---- > 2 files changed, 9 insertions(+), 4 deletions(-) > > diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h > index 2e11da2f5621..07d607947805 100644 > --- a/arch/x86/kvm/kvm_cache_regs.h > +++ b/arch/x86/kvm/kvm_cache_regs.h > @@ -55,6 +55,13 @@ static inline void kvm_register_mark_available(struct kvm_vcpu *vcpu, > __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); > } > > +static inline void kvm_register_clear_available(struct kvm_vcpu *vcpu, > + enum kvm_reg reg) > +{ > + __clear_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); > + __clear_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty); > +} > + > static inline void kvm_register_mark_dirty(struct kvm_vcpu *vcpu, > enum kvm_reg reg) > { > diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c > index 271196400495..2843732299a2 100644 > --- a/arch/x86/kvm/svm/svm.c > +++ b/arch/x86/kvm/svm/svm.c > @@ -3880,10 +3880,8 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu) > vcpu->arch.apf.host_apf_flags = > kvm_read_and_reset_apf_flags(); > > - if (npt_enabled) { > - vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); > - vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); > - } > + if (npt_enabled) > + kvm_register_clear_available(vcpu, VCPU_EXREG_PDPTR); > > /* > * We need to handle MC intercepts here before the vcpu has a chance to > Reviewed-by: Paolo Bonzini