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crypto: ccp: Add the SNP_SET_CONFIG command

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The SEV-SNP firmware provides the SNP_CONFIG command used to set various
system-wide configuration values for SNP guests, such as the reported
TCB version used when signing guest attestation reports. Add an
interface to set this via userspace.

  [ mdr: Squash in doc patch from Dionna, drop extended request/
    certificate handling and simplify this to a simple wrapper around
    SNP_CONFIG fw cmd. ]

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Co-developed-by: Alexey Kardashevskiy <aik@amd.com>
Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
Co-developed-by: Dionna Glaze <dionnaglaze@google.com>
Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240126041126.1927228-26-michael.roth@amd.com
This commit is contained in:
Brijesh Singh 2024-01-25 22:11:25 -06:00 • committed by Borislav Petkov (AMD)
commit cb645fe478
3 changed files with 34 additions and 0 deletions
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