crypto: ccp - Flush the SEV-ES TMR memory before giving it to firmware

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Perform a cache flush on the SEV-ES TMR memory after allocation to prevent
any possibility of the firmware encountering an error should dirty cache
lines be present. Use clflush_cache_range() to flush the SEV-ES TMR memory.

Fixes: 97f9ac3db6 ("crypto: ccp - Add support for SEV-ES to the PSP driver")
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Tom Lendacky 2023-01-23 16:53:08 -06:00 • committed by Herbert Xu

parent 7ce515e636

commit 46a334a98f

1 changed files with 5 additions and 1 deletions

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drivers/crypto/ccp/sev-dev.c

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