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 A54D2C433FE for ; Thu, 2 Dec 2021 14:39:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347376AbhLBOnN (ORCPT ); Thu, 2 Dec 2021 09:43:13 -0500 Received: from mail-wr1-f53.google.com ([209.85.221.53]:33539 "EHLO mail-wr1-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241837AbhLBOnM (ORCPT ); Thu, 2 Dec 2021 09:43:12 -0500 Received: by mail-wr1-f53.google.com with SMTP id d24so60233514wra.0; Thu, 02 Dec 2021 06:39:48 -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=72a6A507OnldVCWrhDSc/GY7lKjxc4B5WRBxEFXAJ3U=; b=OvOwn9o4CByWmhPJ6wX9eFJKNYc/jeBMoH23FBpyvULTTIUpsPm646poAlYTzMsijD tl/Cn/vT6+tfc8IbpPA4WaXi6QTHju9OnhUgIoA4nPpenooFO+eX1NYQvVFIGE0f3eUp Bl1wRUNsrLV//Aj0imQev2p1Xbk2GDf7Dwsbs1TkUWfbWMKMLHQs9XeFEi2cwoaNH/TP RRutqs6PaqZcxqJplPHsyeUn8cQ4U5PjZfZdHku0VgX9r7dpkD38mKgAfmw/OoGLHo9Q o2fvp8u0m5ugxWq1L3UoXXW+3vXdQIuQvgVcwKfNWt0SqQnce69oIcAm+CwsF2vwvgLS OXvw== X-Gm-Message-State: AOAM531BgqktD2QcGGCTBXdPyWblVdklHCblii1t/aXZAsIYEeFwzZGH o6113nZRJtpX2mP5hsE0Byk= X-Google-Smtp-Source: ABdhPJxPzdtd3RdqIbFdq4J+qJfyoes2s3XiUvAs4cyVDgX4hcthvPCvHGkt6Ry5P/1NlIy3ec+13w== X-Received: by 2002:adf:d4c2:: with SMTP id w2mr14815368wrk.225.1638455988303; Thu, 02 Dec 2021 06:39:48 -0800 (PST) Received: from liuwe-devbox-debian-v2 ([51.145.34.42]) by smtp.gmail.com with ESMTPSA id z5sm2876037wmp.26.2021.12.02.06.39.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Dec 2021 06:39:47 -0800 (PST) Date: Thu, 2 Dec 2021 14:39:46 +0000 From: Wei Liu To: Tianyu Lan Cc: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, jgross@suse.com, sstabellini@kernel.org, boris.ostrovsky@oracle.com, joro@8bytes.org, will@kernel.org, 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, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, xen-devel@lists.xenproject.org, 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, parri.andrea@gmail.com, dave.hansen@intel.com Subject: Re: [PATCH V3 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() Message-ID: <20211202143946.7o7ncwcjq3t6xcrq@liuwe-devbox-debian-v2> References: <20211201160257.1003912-1-ltykernel@gmail.com> <20211201160257.1003912-3-ltykernel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211201160257.1003912-3-ltykernel@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org On Wed, Dec 01, 2021 at 11:02:53AM -0500, Tianyu Lan wrote: > From: Tianyu Lan > > Hyper-V provides Isolation VM which has memory encrypt support. Add > hyperv_cc_platform_has() and return true for check of GUEST_MEM_ENCRYPT > attribute. > > Signed-off-by: Tianyu Lan > --- > arch/x86/kernel/cc_platform.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/arch/x86/kernel/cc_platform.c b/arch/x86/kernel/cc_platform.c > index 03bb2f343ddb..f3bb0431f5c5 100644 > --- a/arch/x86/kernel/cc_platform.c > +++ b/arch/x86/kernel/cc_platform.c > @@ -11,6 +11,7 @@ > #include > #include > > +#include > #include > > static bool __maybe_unused intel_cc_platform_has(enum cc_attr attr) > @@ -58,9 +59,23 @@ static bool amd_cc_platform_has(enum cc_attr attr) > #endif > } > > +static bool hyperv_cc_platform_has(enum cc_attr attr) > +{ > +#ifdef CONFIG_HYPERV > + if (attr == CC_ATTR_GUEST_MEM_ENCRYPT) > + return true; > + else > + return false; This can be simplified as return attr == CC_ATTR_GUEST_MEM_ENCRYPT; Wei.