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

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

[ Upstream commit 46a334a98f585ef78d51d8f5736596887bdd7f54 ]

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: 97f9ac3db661 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>