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Wed, 10 Nov 2021 22:15:29 +0000 X-Received: from sbrijesh-desktop.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Wed, 10 Nov 2021 16:15:27 -0600 From: "Brijesh Singh via groups.io" To: CC: James Bottomley , Min Xu , "Jiewen Yao" , Tom Lendacky , "Jordan Justen" , Ard Biesheuvel , Erdem Aktas , "Michael Roth" , Gerd Hoffmann , "Michael D Kinney" , Liming Gao , Zhiguang Liu , Ray Ni , Rahul Kumar , Eric Dong , Brijesh Singh , Michael Roth Subject: [edk2-devel] [PATCH v12 23/32] UefiCpuPkg: add PcdGhcbHypervisorFeatures Date: Wed, 10 Nov 2021 16:14:48 -0600 Message-ID: <20211110221457.2397234-24-brijesh.singh@amd.com> In-Reply-To: <20211110221457.2397234-1-brijesh.singh@amd.com> References: <20211110221457.2397234-1-brijesh.singh@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4c5206ac-ae2e-4c25-fd8f-08d9a4979ac7 X-MS-TrafficTypeDiagnostic: MWHPR12MB1728: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; 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contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,brijesh.singh@amd.com X-Gm-Message-State: gi3Y7HUCxas3T35KwZGXAiTfx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1636582538; bh=34uxghBKdGJVZXNRIDvHHac7JgAtzgXj3qKnWHCadH8=; h=CC:Content-Type:Date:From:Reply-To:Subject:To; b=g5QvmonViIULEmKQc6Jn/1BEDskWQAwRkDjgrd0rd+em49NOYKSdOnTvzXBC5kza2AR n65Mur0E0yY8wjcj588JvWD+bRP/9Q33KHOQYwgChys6/bgNs62m3dzrkT3Y85wOwN+iJ zvk94qu80LrfBTjkZjhVUmgLewXj4ZECk7c= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1636582541318100069 Content-Type: text/plain; charset="utf-8" BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3D3275 Version 2 of the GHCB specification added a new VMGEXIT that the guest could use for querying the hypervisor features. One of the immediate users for it will be an AP creation code. When SEV-SNP is enabled, the guest can use the newly added AP_CREATE VMGEXIT to create the APs. The MpInitLib will check the hypervisor feature, and if AP_CREATE is available, it will use it. See GHCB spec version 2 for more details on the VMGEXIT. Cc: Michael Roth Cc: Ray Ni Cc: Rahul Kumar Cc: Eric Dong Cc: James Bottomley Cc: Min Xu Cc: Jiewen Yao Cc: Tom Lendacky Cc: Jordan Justen Cc: Ard Biesheuvel Cc: Erdem Aktas Cc: Gerd Hoffmann Acked-by: Gerd Hoffmann Signed-off-by: Brijesh Singh Acked-by: Ray Ni --- UefiCpuPkg/UefiCpuPkg.dec | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec index 62acb291f309..7de66fde674c 100644 --- a/UefiCpuPkg/UefiCpuPkg.dec +++ b/UefiCpuPkg/UefiCpuPkg.dec @@ -396,5 +396,10 @@ [PcdsDynamic, PcdsDynamicEx] # @Prompt SEV-ES Status gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled|FALSE|BOOLEAN|0x60000016 =20 + ## This dynamic PCD contains the hypervisor features value obtained thro= ugh the GHCB HYPERVISOR + # features VMGEXIT defined in the version 2 of GHCB spec. + # @Prompt GHCB Hypervisor Features + gUefiCpuPkgTokenSpaceGuid.PcdGhcbHypervisorFeatures|0x0|UINT64|0x60000018 + [UserExtensions.TianoCore."ExtraFiles"] UefiCpuPkgExtra.uni --=20 2.25.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. 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