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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0C1AC433EF for ; Wed, 23 Feb 2022 11:03:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239750AbiBWLD2 (ORCPT ); Wed, 23 Feb 2022 06:03:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231893AbiBWLD1 (ORCPT ); Wed, 23 Feb 2022 06:03:27 -0500 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75F084EF71 for ; Wed, 23 Feb 2022 03:02:58 -0800 (PST) Received: by mail-pj1-x102c.google.com with SMTP id g7-20020a17090a708700b001bb78857ccdso1840461pjk.1 for ; Wed, 23 Feb 2022 03:02:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=uHFBFunfaJIqNpyruyoJx0PZskQ9wSm+0m0Ug2WaIFI=; b=kJckXw4hOlbwUqgotgVHd/yvlIaF2pqI2TToQDj148qHYnzjksXpCmJ9hXf6JqODpZ povb3QSWwwuT72yJYlLaIeViQNJrizsYlF0H1+ssjEDdYDJh2FU4+kjCVTdaHhdlsLT6 +cbzquLrs+aQ2wASHBXfkm6bqZjclnyWW45Mq6aYwLvaECXplEQPCuj5WCTrjv4dHvFo giCB8GLZtm1azEzdKELDgJNTzmiGjHtjWmF6LcPwhO9LCiDsXWNSuztO2nzxJ9431DeS V50h620xDDDDz5z4X3IziyQQDtfluGDB5kOmrHg7KM8za5wvP2TKVGSI//viAYZYLsRy Ufdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=uHFBFunfaJIqNpyruyoJx0PZskQ9wSm+0m0Ug2WaIFI=; b=NdmYcbK5D0XBGmQYvfe5hMIuyH3ucdIM3FGjEkL6G0uIAhtVIM3hpRCH5M1uS7afR8 fUVqV8rLAy4nCQ5Je9k5eibLwVyi6bZANz5IIHRZDq4nmu/yuoX8rtj41rmPXvsxPmj+ 4r5yQabSsZ5HcVqlt0hxbUZG0gsMCYwCx8yHOgt6DsQeofw+NCTKJ7OjK7isgAYSB7cn W8fd3FjbvhElj4ohDkeQKi7npqA0sD16Pj1OGwU1f8+tWdyrj0Ow/wVEgfEU8R1uUvPI OpKYI4heJ0oblnJkZ7ps/H7leEcCRG8I0f7BTFc2DrHhOnObewwPNcNWm3VYPfGrVTcp m1YQ== X-Gm-Message-State: AOAM530QmpT8PvS1QMnO8OZdhafBQTigCYMly9no7ngtvdjXB86mmBW3 NVNgEM++b22HYJ/MLTa7qj0= X-Google-Smtp-Source: ABdhPJygDdF6N9XosDy2ac1bnn7mItgsmnB783rUZupBIV0aIF2MWctWLuUu3fELfQ9IaoC4Vgc0UQ== X-Received: by 2002:a17:902:b706:b0:14e:eef0:2a8b with SMTP id d6-20020a170902b70600b0014eeef02a8bmr28023508pls.9.1645614178017; Wed, 23 Feb 2022 03:02:58 -0800 (PST) Received: from ?IPV6:2404:f801:0:5:8000::754? ([2404:f801:9000:18:efec::754]) by smtp.gmail.com with ESMTPSA id t14sm24573027pgo.19.2022.02.23.03.02.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Feb 2022 03:02:57 -0800 (PST) Message-ID: Date: Wed, 23 Feb 2022 19:02:49 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.0 Subject: Re: [PATCH 1/4] x86/hyperv: Add missing ARCH_HAS_CC_PLATFORM dependency Content-Language: en-US To: Borislav Petkov Cc: "Kirill A. Shutemov" , Wei Liu , tglx@linutronix.de, mingo@redhat.com, dave.hansen@intel.com, luto@kernel.org, peterz@infradead.org, sathyanarayanan.kuppuswamy@linux.intel.com, aarcange@redhat.com, ak@linux.intel.com, dan.j.williams@intel.com, david@redhat.com, hpa@zytor.com, jmattson@google.com, seanjc@google.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, x86@kernel.org, linux-kernel@vger.kernel.org, "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Dexuan Cui , Tianyu Lan References: <20220222185740.26228-1-kirill.shutemov@linux.intel.com> <20220222185740.26228-2-kirill.shutemov@linux.intel.com> <4769a3c0-449b-184a-5c61-a0e155f9c5b4@gmail.com> From: Tianyu Lan In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/23/2022 6:56 PM, Borislav Petkov wrote: > On Wed, Feb 23, 2022 at 06:43:40PM +0800, Tianyu Lan wrote: >> Hyper-V code check cpuid during runtime and there is no Hyper-V >> isolation VM option. > > So how does "Current Hyper-V Isolation VM requires AMD_MEM_ENCRYPT" work > exactly? > > Please explain in detail and not in piecemeal sentences. > The kernel in the image needs to select AMD_MEM_ENCRYPT option otherwise the kernel can't boot up due to missing SEV support and sev_es_ghcb_hv_call() always return error.