tree 0445ffa9161c2aba05caf2e92fbeb6eb2fcacd00
parent 42f1fef5a620e98e7ece6a60744992265cc409d7
author Eugene D. Myers <edmyers@cyberpackventures.com> 1698957296 -0700
committer Felix Held <felix-coreboot@felixheld.de> 1699630033 +0000

cpu/x86/smm: Fix get_save_state calculation

When the SMI transfer monitor (STM) is configured, get_save_state
returns an incorrect pointer to the cpu save state because the size
(rounded up to 0x100) of the processor System Management Mode (SMM)
descriptor needs to be subtracted out in this case.

This patch addresses the issue identified in CB:76601, which means
that SMMSTOREv2 now works with the STM.

Thanks to Jeremy Compostella for suggesting this version of the patch.

Resolves: https://ticket.coreboot.org/issues/511

Change-Id: I0233c6d13bdffb3853845ac6ef25c066deaab747
Signed-off-by: Eugene D. Myers <edmyers@cyberpackventures.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78889
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>