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=-13.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no 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 A6A4FC433DB for ; Tue, 12 Jan 2021 17:36:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6CA122311D for ; Tue, 12 Jan 2021 17:36:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389851AbhALRgu (ORCPT ); Tue, 12 Jan 2021 12:36:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727513AbhALRgt (ORCPT ); Tue, 12 Jan 2021 12:36:49 -0500 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41B54C061794 for ; Tue, 12 Jan 2021 09:36:09 -0800 (PST) Received: by mail-pj1-x102d.google.com with SMTP id v1so2039114pjr.2 for ; Tue, 12 Jan 2021 09:36:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=kBoeCrqN2k6hVDBNDBFoP9slGG3T38BN8I1wekGgzs8=; b=IJk767It+WkeZlRni4t1QJT6YRO2W0GVVlNuXV5L3VtoFJdJ1V7YbFOINLcHmAX1/5 qW/ibvQZpy1IyiOqbK89qYW2OT1KM8G7IRF5XTzyfjEKQhlfYOq9yRSpN/iD4M7hBpNS LesTKJ0bftCKfPOKD6lojIyze730MgROX19414sH9yuOIPOK3dVuzX2SMc3eVDa+7Eff 7XYJ35X0Ggqxqp44fWXM9hp60v/rhvLMPkBpJ65qAEZLU/TBR9SGV///ysv0W9sSWDgs e57Cu84YuOOI5mC0V5cJXdvCNIFVT0kZHOqpQnFahYAzULSSWKoZR8V2YdUEFRwYHIcV VPDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=kBoeCrqN2k6hVDBNDBFoP9slGG3T38BN8I1wekGgzs8=; b=GXwdqF1WZmdIKXuFPxk81/CBOpF8ALsn6CnVO3BnRGXUWcFRwlJNt1rrT6uJULc+1I S8jR4h/k9eXOfqy51gFpcAQdE9Z7mgHwG0T66jrbzPhGUoO8iKttTc89tTSMqEH2tSqo YKHPx3XKo/An5D+E+zYsNbK2SwlzCr5WuPqSAOqYS/Wuhlx5EPbJ9VRFKsh2Wb/Fs3Gl bHVZcQFC9IO2+hkoQfYR29u2ixZka/29dcrgU0oCjlSWtc+8d2nLbvHwEwxO9tgsXppn Cjg0I8HO0vgjcF0pC1iNaJezurMOGgSAxPfQCc+sd9peKgR629pphtvb3J047dTdIxl6 bVnw== X-Gm-Message-State: AOAM5327ZK6j6diAbqnvyAiq87QDxTPvaHXvjdJE3lK+LrFSaksuvQ9i ieggVhFOxVksG8tHAjM03QKmZA== X-Google-Smtp-Source: ABdhPJycyDGJ7mjxh6atJ3kxaqss3ug8XgjvQHIftL9wwPSdeemCp+9hFzYCBh03Etv8hBGv+BDTqA== X-Received: by 2002:a17:90a:5298:: with SMTP id w24mr199739pjh.182.1610472968667; Tue, 12 Jan 2021 09:36:08 -0800 (PST) Received: from google.com ([2620:15c:f:10:1ea0:b8ff:fe73:50f5]) by smtp.gmail.com with ESMTPSA id p9sm4032823pjb.3.2021.01.12.09.36.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jan 2021 09:36:07 -0800 (PST) Date: Tue, 12 Jan 2021 09:36:01 -0800 From: Sean Christopherson To: Wei Huang Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, vkuznets@redhat.com, joro@8bytes.org, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, x86@kernel.org, jmattson@google.com, wanpengli@tencent.com, bsd@redhat.com, dgilbert@redhat.com, mlevitsk@redhat.com Subject: Re: [PATCH 1/2] KVM: x86: Add emulation support for #GP triggered by VM instructions Message-ID: References: <20210112063703.539893-1-wei.huang2@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210112063703.539893-1-wei.huang2@amd.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 12, 2021, Wei Huang wrote: > From: Bandan Das > > While running VM related instructions (VMRUN/VMSAVE/VMLOAD), some AMD > CPUs check EAX against reserved memory regions (e.g. SMM memory on host) > before checking VMCB's instruction intercept. It would be very helpful to list exactly which CPUs are/aren't affected, even if that just means stating something like "all CPUs before XYZ". Given patch 2/2, I assume it's all CPUs without the new CPUID flag?