crypto: ccp: Handle the legacy TMR allocation when SNP is enabled

Browse source

The behavior and requirement for the SEV-legacy command is altered when
the SNP firmware is in the INIT state. See SEV-SNP firmware ABI
specification for more details.

Allocate the Trusted Memory Region (TMR) as a 2MB-sized/aligned region
when SNP is enabled to satisfy new requirements for SNP. Continue
allocating a 1MB-sized region for !SNP configuration.

  [ bp: Carve out TMR allocation into a helper. ]

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Co-developed-by: Ashish Kalra <ashish.kalra@amd.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/20240126041126.1927228-17-michael.roth@amd.com

...

This commit is contained in:

Brijesh Singh 2024-01-25 22:11:16 -06:00 • committed by Borislav Petkov (AMD)

parent 8dac642999

commit 24512afa43

2 changed files with 176 additions and 26 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

193

drivers/crypto/ccp/sev-dev.c

View file

9

include/linux/psp-sev.h

View file