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[23.128.96.18]) by mx.google.com with ESMTP id r2si1642568eds.180.2021.01.12.09.38.45; Tue, 12 Jan 2021 09:39:08 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=IJk767It; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389300AbhALRgt (ORCPT + 99 others); Tue, 12 Jan 2021 12:36:49 -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-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?