From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Brijesh Singh <brijesh.singh@amd.com>
Cc: devel@edk2.groups.io, James Bottomley <jejb@linux.ibm.com>,
Min Xu <min.m.xu@intel.com>, Jiewen Yao <jiewen.yao@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Jordan Justen <jordan.l.justen@intel.com>,
Ard Biesheuvel <ardb+tianocore@kernel.org>,
Erdem Aktas <erdemaktas@google.com>,
Michael Roth <Michael.Roth@amd.com>
Subject: Re: [PATCH v6 02/29] OvmfPkg: reserve CPUID page for SEV-SNP
Date: Fri, 3 Sep 2021 08:28:02 +0200 [thread overview]
Message-ID: <20210903062802.v6pctzlaidockzm6@sirius.home.kraxel.org> (raw)
In-Reply-To: <b3088369-8ded-ee68-60bd-4d4030c481bb@amd.com>
Hi,
> >> Is this snp-specific? Or could this also be used without snp?
> > This is SNP specific format and cannot be used without SNP.
>
> I should clarify the statement, the format itself does not contain
> anything SNP specific. However, the CPUID page format is documented in
> the SNP specific spec.
Who populates the page? qemu? sev-snp firmware?
> Are you thinking about using it for non SEV guest
> to avoid the VM exit ? If so, it should be very much possible.
Yes, that is the background. Avoiding vmexits would be one advantage.
Being able to test the code without SNP-capable hardware (for example
in CI) would be another one.
> For that
> we should define the format outside of SNP specific spec and make it a
> generic so that guest and HV's can implement it consume it in the
> non-SNP guest.
I think that would be useful.
take care,
Gerd
next prev parent reply other threads:[~2021-09-03 6:28 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-01 16:16 [PATCH v6 00/29] Add AMD Secure Nested Paging (SEV-SNP) support Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 01/29] OvmfPkg: reserve SNP secrets page Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 02/29] OvmfPkg: reserve CPUID page for SEV-SNP Brijesh Singh
2021-09-02 8:04 ` Gerd Hoffmann
2021-09-02 12:28 ` Brijesh Singh
2021-09-02 21:17 ` Brijesh Singh
2021-09-03 6:28 ` Gerd Hoffmann [this message]
2021-09-03 11:56 ` [edk2-devel] " Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 03/29] OvmfPkg/ResetVector: introduce SEV-SNP boot block GUID Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 04/29] OvmfPkg/ResetVector: invalidate the GHCB page Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 05/29] OvmfPkg/ResetVector: check the vmpl level Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 06/29] OvmfPkg/ResetVector: pre-validate the data pages used in SEC phase Brijesh Singh
2021-09-02 8:20 ` Gerd Hoffmann
2021-09-06 1:10 ` [edk2-devel] " Min Xu
2021-09-06 12:16 ` Gerd Hoffmann
2021-09-06 13:19 ` Min Xu
2021-09-07 7:07 ` Gerd Hoffmann
2021-09-07 13:27 ` Brijesh Singh
2021-09-08 6:36 ` Min Xu
2021-09-14 3:49 ` Yao, Jiewen
2021-09-16 7:42 ` Gerd Hoffmann
2021-09-01 16:16 ` [PATCH v6 07/29] OvmfPkg/ResetVector: use SEV-SNP-validated CPUID values Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 08/29] UefiCpuPkg: Define the SEV-SNP specific dynamic PCDs Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 09/29] OvmfPkg/MemEncryptSevLib: add MemEncryptSevSnpEnabled() Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 10/29] OvmfPkg/SecMain: move SEV specific routines in AmdSev.c Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 11/29] OvmfPkg/SecMain: register GHCB gpa for the SEV-SNP guest Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 12/29] OvmfPkg/VmgExitLib: use SEV-SNP-validated CPUID values Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 13/29] OvmfPkg/PlatformPei: register GHCB gpa for the SEV-SNP guest Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 14/29] OvmfPkg/AmdSevDxe: do not use extended PCI config space Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 15/29] OvmfPkg/MemEncryptSevLib: add support to validate system RAM Brijesh Singh
2021-09-02 9:50 ` Gerd Hoffmann
2021-09-02 13:34 ` Brijesh Singh
2021-09-03 7:04 ` Gerd Hoffmann
2021-09-01 16:16 ` [PATCH v6 16/29] OvmfPkg/BaseMemEncryptSevLib: skip the pre-validated " Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 17/29] OvmfPkg/MemEncryptSevLib: add support to validate > 4GB memory in PEI phase Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 18/29] OvmfPkg/SecMain: pre-validate the memory used for decompressing Fv Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 19/29] OvmfPkg/PlatformPei: validate the system RAM when SNP is active Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 20/29] OvmfPkg/PlatformPei: set the SEV-SNP enabled PCD Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 21/29] OvmfPkg/PlatformPei: set the Hypervisor Features PCD Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 22/29] MdePkg/GHCB: increase the GHCB protocol max version Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 23/29] UefiCpuPkg/MpLib: add support to register GHCB GPA when SEV-SNP is enabled Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 24/29] UefiCpuPkg/MpInitLib: use BSP to do extended topology check Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 25/29] OvmfPkg/MemEncryptSevLib: change the page state in the RMP table Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 26/29] OvmfPkg/MemEncryptSevLib: skip page state change for Mmio address Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 27/29] OvmfPkg/PlatformPei: mark cpuid and secrets memory reserved in EFI map Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 28/29] OvmfPkg/AmdSev: expose the SNP reserved pages through configuration table Brijesh Singh
2021-09-01 16:16 ` [PATCH v6 29/29] UefiCpuPkg/MpInitLib: Use SEV-SNP AP Creation NAE event to launch APs Brijesh Singh
2021-09-07 2:36 ` [PATCH v6 00/29] Add AMD Secure Nested Paging (SEV-SNP) support Yao, Jiewen
2021-09-08 2:29 ` Min Xu
2021-09-08 6:03 ` Yao, Jiewen
2021-09-08 19:45 ` Brijesh Singh
2021-09-09 0:31 ` Min Xu
2021-09-09 10:51 ` Brijesh Singh
2021-09-09 11:22 ` Gerd Hoffmann
2021-09-09 11:40 ` Brijesh Singh
2021-09-09 11:45 ` [edk2-devel] " Min Xu
2021-09-09 11:55 ` Yao, Jiewen
2021-09-12 22:55 ` Brijesh Singh
2021-09-13 0:33 ` Yao, Jiewen
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