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 640C8C433FE for ; Tue, 14 Dec 2021 16:10:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235536AbhLNQKJ (ORCPT ); Tue, 14 Dec 2021 11:10:09 -0500 Received: from mail-wr1-f51.google.com ([209.85.221.51]:43006 "EHLO mail-wr1-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235532AbhLNQKI (ORCPT ); Tue, 14 Dec 2021 11:10:08 -0500 Received: by mail-wr1-f51.google.com with SMTP id c4so33200068wrd.9; Tue, 14 Dec 2021 08:10:07 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=ZHPbCWI6bYGyjK8mmI0D3KyfsrOlvTBd5Vd+F5/Vwkw=; b=GVdnAkdGmrpQ/TDUYhNXccYo3u5fEwyCAJ51PVTyCJw6L2I5qjgfKFwL247pJDPB7G cJkp6f3BCpJVP9kcsXylsd7h37n26VdtqGo0Hx35Tpze9WuO/C/gCJH/YvnL8F7XX91b tPJTDkXh5I2cdX8s86GBKZCHvBO6fSOJBEYIOouXuZZXz1VoLMLWKix6khcVDJDljB3B fE+wzEPF8qS1sIkRjs0zpeOloB8j2xhJjk4NUInphZK3SUb+1ba02ptbFrSHSVLMRSBa 0BPOJW5xlMSSnvcvxhvo9MFejxI9vvcu8qyrWWsGFgUqJySrlBOtkoP20yWBwwIv4Wz8 QKtw== X-Gm-Message-State: AOAM533HBFrhwYZgV3g+BXJnvn1FoDEE+PB9L0U+Hm8qIQ7fux23qUcU 5hQux9fJBMgq6mN/s6hy9R8= X-Google-Smtp-Source: ABdhPJzA+fSss7tQ8CtjfcSBZIFl347bWFgxFbLG30HYf3L29Y8+Tw56U4i6sm2K19aVkEk2EE2ZJw== X-Received: by 2002:a5d:6a8f:: with SMTP id s15mr6869384wru.544.1639498206781; Tue, 14 Dec 2021 08:10:06 -0800 (PST) Received: from liuwe-devbox-debian-v2 ([51.145.34.42]) by smtp.gmail.com with ESMTPSA id u10sm363011wrs.99.2021.12.14.08.10.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Dec 2021 08:10:06 -0800 (PST) Date: Tue, 14 Dec 2021 16:10:04 +0000 From: Wei Liu To: Borislav Petkov Cc: Tianyu Lan , kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@infradead.org, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com, michael.h.kelley@microsoft.com, iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, brijesh.singh@amd.com, konrad.wilk@oracle.com, hch@lst.de, joro@8bytes.org, parri.andrea@gmail.com, dave.hansen@intel.com Subject: Re: [PATCH V7 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() Message-ID: <20211214161004.6ofxl5ko43myn76o@liuwe-devbox-debian-v2> References: <20211213071407.314309-1-ltykernel@gmail.com> <20211213071407.314309-3-ltykernel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Tue, Dec 14, 2021 at 05:05:01PM +0100, Borislav Petkov wrote: > On Mon, Dec 13, 2021 at 02:14:03AM -0500, Tianyu Lan wrote: > > From: Tianyu Lan > > > > Hyper-V provides Isolation VM for confidential computing support and > > guest memory is encrypted in it. Places checking cc_platform_has() > > with GUEST_MEM_ENCRYPT attr should return "True" in Isolation vm. e.g, > > Stick to a single spelling variant: "VM". > > > swiotlb bounce buffer size needs to adjust according to memory size > > in the sev_setup_arch(). > > So basically you wanna simply say here: > > "Hyper-V Isolation VMs need to adjust the SWIOTLB size just like SEV > guests. Add a hyperv_cc_platform_has() variant which enables that." > > ? > > With that addressed you can have my > > Acked-by: Borislav Petkov Thanks. I can address your comments when I pick up this series. Wei. > > Thx. > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette