tree ef295b496e9403c6c8e297db37b456abd4720099
parent 7b2edc3b6b5ecd37112d5e07f4601b68b2aea038
author Anil Kumar <anil.kumar.k@intel.com> 1682966687 -0700
committer Subrata Banik <subratabanik@google.com> 1696398679 +0000

soc/intel/cse: Check PSR bit before issuing PSR backup command

Get PSR bit state using MKHI_FWCAPS_GET_FW_FEATURE_STATE HECI command
Use this bit info to check if SKU supports PSR and consequently issue
PSR_HECI_FW_DOWNGRADE_BACKUP command for PSR data backup during
downgrade.

BUG=b:273207144
TEST=build CB image and boot on google/rex board. Check for
"PSR is supported in this SKU" message in coreboot logs to confirm
that PSR bit is set in SKU

Signed-off-by: Anil Kumar <anil.kumar.k@intel.com>
Change-Id: I6e92341a9dc799146eb8f1a70b3a4a16fd1aa0ae
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74874
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>