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From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Tom Lendacky <thomas.lendacky@amd.com>
Cc: devel@edk2.groups.io, Ard Biesheuvel <ardb+tianocore@kernel.org>,
	 Erdem Aktas <erdemaktas@google.com>,
	Jiewen Yao <jiewen.yao@intel.com>,
	 Laszlo Ersek <lersek@redhat.com>,
	Liming Gao <gaoliming@byosoft.com.cn>,
	 Michael D Kinney <michael.d.kinney@intel.com>,
	Min Xu <min.m.xu@intel.com>,
	 Zhiguang Liu <zhiguang.liu@intel.com>,
	Rahul Kumar <rahul1.kumar@intel.com>, Ray Ni <ray.ni@intel.com>,
	 Michael Roth <michael.roth@amd.com>
Subject: Re: [edk2-devel] [PATCH v2 22/23] Ovmfpkg/CcExitLib: Provide SVSM discovery support
Date: Wed, 28 Feb 2024 09:54:27 +0100	[thread overview]
Message-ID: <6gpjzqmtwll47p4cdxogz2pnyyeikmp5sohywdtgwdcsejj6gl@qfde6jroqhrf> (raw)
In-Reply-To: <806aee9c79e2c996b19795d44859adbc10f94b43.1708623001.git.thomas.lendacky@amd.com>

On Thu, Feb 22, 2024 at 11:30:01AM -0600, Tom Lendacky wrote:
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4654
> 
> The SVSM specification documents an alternative method of discovery for
> the SVSM using a reserved CPUID bit and a reserved MSR.
> 
> For the CPUID support, the #VC handler of an SEV-SNP guest should modify
> the returned value in the EAX register for the 0x8000001f CPUID function
> by setting bit 28 when an SVSM is present.
> 
> For the MSR support, new reserved MSR 0xc001f000 has been defined. A #VC
> should be generated when accessing this MSR. The #VC handler is expected
> to ignore writes to this MSR and return the physical calling area address
> (CAA) on reads of this MSR.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>

Acked-by: Gerd Hoffmann <kraxel@redhat.com>



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  reply	other threads:[~2024-02-28  8:54 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-22 17:29 [edk2-devel] [PATCH v2 00/23] Provide SEV-SNP support for running under an SVSM Lendacky, Thomas via groups.io
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 01/23] OvmfPkg/BaseMemEncryptLib: Fix error check from AsmRmpAdjust() Lendacky, Thomas via groups.io
2024-02-27  9:46   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 02/23] MdePkg: GHCB APIC ID retrieval support definitions Lendacky, Thomas via groups.io
2024-02-23  0:16   ` Ni, Ray
2024-02-27 10:02     ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 03/23] OvmfPkg/PlatformPei: Retrieve APIC IDs from the hypervisor Lendacky, Thomas via groups.io
2024-02-27 10:03   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 04/23] UefiCpuPkg/MpInitLib: Always use AP Create if PcdSevSnpApicIds is set Lendacky, Thomas via groups.io
2024-02-27 10:11   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 05/23] OvmfPkg/BaseMemEncryptSevLib: Fix uncrustify errors Lendacky, Thomas via groups.io
2024-02-27 10:12   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 06/23] OvmfPkg/BaseMemEncryptSevLib: Calculate memory size for Page State Change Lendacky, Thomas via groups.io
2024-02-27 10:17   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 07/23] MdePkg: Avoid hardcoded value for number of Page State Change entries Lendacky, Thomas via groups.io
2024-02-27 10:18   ` Gerd Hoffmann
2024-02-27 15:52     ` Lendacky, Thomas via groups.io
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 08/23] OvmfPkg/BaseMemEncryptSevLib: Re-organize page state change support Lendacky, Thomas via groups.io
2024-02-27 11:07   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 09/23] OvmfPkg/BaseMemEncryptSevLib: Maximize Page State Change efficiency Lendacky, Thomas via groups.io
2024-02-27 11:19   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 10/23] MdePkg/Register/Amd: Define the SVSM related information Lendacky, Thomas via groups.io
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 11/23] MdePkg/BaseLib: Add a new VMGEXIT instruction invocation for SVSM Lendacky, Thomas via groups.io
2024-02-27 11:50   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 12/23] UefiCpuPkg/CcSvsmLib: Create the CcSvsmLib library to support an SVSM Lendacky, Thomas via groups.io
2024-02-27 11:53   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 13/23] UefiPayloadPkg: Prepare UefiPayloadPkg to use the CcSvsmLib library Lendacky, Thomas via groups.io
2024-02-27 11:54   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 14/23] Ovmfpkg/CcSvsmLib: Create CcSvsmLib to handle SVSM related services Lendacky, Thomas via groups.io
2024-02-28  8:40   ` Gerd Hoffmann
2024-02-28 15:51     ` Lendacky, Thomas via groups.io
2024-03-01 10:59       ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 15/23] UefiCpuPkg/MpInitLib: Use CcSvsmSnpVmsaRmpAdjust() to set/clear VMSA Lendacky, Thomas via groups.io
2024-02-28  8:42   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 16/23] OvmfPkg/BaseMemEncryptSevLib: Use CcSvsmSnpPvalidate() to validate pages Lendacky, Thomas via groups.io
2024-02-28  8:43   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 17/23] OvmfPkg: Create a calling area used to communicate with the SVSM Lendacky, Thomas via groups.io
2024-02-28  8:44   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 18/23] OvmfPkg/CcSvsmLib: Add support for the SVSM_CORE_PVALIDATE call Lendacky, Thomas via groups.io
2024-02-28  8:50   ` Gerd Hoffmann
2024-02-28 15:58     ` Lendacky, Thomas via groups.io
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 19/23] OvmfPkg/BaseMemEncryptSevLib: Maximize Page State Change efficiency Lendacky, Thomas via groups.io
2024-02-28  8:50   ` Gerd Hoffmann
2024-02-22 17:29 ` [edk2-devel] [PATCH v2 20/23] OvmfPkg/CcSvsmLib: Add support for the SVSM create/delete vCPU calls Lendacky, Thomas via groups.io
2024-02-28  8:52   ` Gerd Hoffmann
2024-02-22 17:30 ` [edk2-devel] [PATCH v2 21/23] UefiCpuPkg/MpInitLib: AP creation support under an SVSM Lendacky, Thomas via groups.io
2024-02-22 17:30 ` [edk2-devel] [PATCH v2 22/23] Ovmfpkg/CcExitLib: Provide SVSM discovery support Lendacky, Thomas via groups.io
2024-02-28  8:54   ` Gerd Hoffmann [this message]
2024-02-22 17:30 ` [edk2-devel] [PATCH v2 23/23] OvmfPkg/BaseMemEncryptLib: Check for presence of an SVSM when not at VMPL0 Lendacky, Thomas via groups.io
2024-02-28  6:14 ` [edk2-devel] [PATCH v2 00/23] Provide SEV-SNP support for running under an SVSM Yao, Jiewen
2024-02-28 16:19   ` Lendacky, Thomas via groups.io
2024-02-29 14:06     ` Yao, Jiewen
2024-02-29 14:36       ` Lendacky, Thomas via groups.io

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