linux-kernel - Re: [PATCH v12 27/29] crypto: ccp: Add the SNP_VLEK

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Date: Wed, 10 Apr 2024 17:20:56 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: Michael Roth <michael.roth@....com>, kvm@...r.kernel.org
Cc: linux-coco@...ts.linux.dev, linux-mm@...ck.org,
 linux-crypto@...r.kernel.org, x86@...nel.org, linux-kernel@...r.kernel.org,
 tglx@...utronix.de, mingo@...hat.com, jroedel@...e.de, hpa@...or.com,
 ardb@...nel.org, pbonzini@...hat.com, seanjc@...gle.com,
 vkuznets@...hat.com, jmattson@...gle.com, luto@...nel.org,
 dave.hansen@...ux.intel.com, slp@...hat.com, pgonda@...gle.com,
 peterz@...radead.org, srinivas.pandruvada@...ux.intel.com,
 rientjes@...gle.com, dovmurik@...ux.ibm.com, tobin@....com, bp@...en8.de,
 vbabka@...e.cz, kirill@...temov.name, ak@...ux.intel.com,
 tony.luck@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
 alpergun@...gle.com, jarkko@...nel.org, ashish.kalra@....com,
 nikunj.dadhania@....com, pankaj.gupta@....com, liam.merwick@...cle.com
Subject: Re: [PATCH v12 27/29] crypto: ccp: Add the SNP_VLEK_LOAD command

On 3/29/24 17:58, Michael Roth wrote:
> When requesting an attestation report a guest is able to specify whether
> it wants SNP firmware to sign the report using either a Versioned Chip
> Endorsement Key (VCEK), which is derived from chip-unique secrets, or a
> Versioned Loaded Endorsement Key (VLEK) which is obtained from an AMD
> Key Derivation Service (KDS) and derived from seeds allocated to
> enrolled cloud service providers (CSPs).
> 
> For VLEK keys, an SNP_VLEK_LOAD SNP firmware command is used to load
> them into the system after obtaining them from the KDS. Add a
> corresponding userspace interface so to allow the loading of VLEK keys
> into the system.
> 
> See SEV-SNP Firmware ABI 1.54, SNP_VLEK_LOAD for more details.
> 
> Signed-off-by: Michael Roth <michael.roth@....com>

Reviewed-by: Tom Lendacky <thomas.lendacky@....com>