soc/intel/meteorlake: Enable SSE2 accelerated RSA sign. verification
Enabling SSE2 accelerated RSA signature verification saves 4.7 ms of
boot time.
| modpow() function call | original | SSE2 Algorithm 2 |
|----------------------------+----------+------------------|
| coreboot/verstage - step 1 | 6.644 | 3.042 |
| coreboot/verstage - step 2 | 1.891 | 0.757 |
|----------------------------+----------+------------------|
| Total (ms) | 8.535 | 3.799 |
BUG=b:312709384
TEST=modular exponentiation is more than twice faster on rex0
Change-Id: I382e62a765dbf2027c4ac54d6eb19a9542a8c302
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79291
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/meteorlake/Kconfig b/src/soc/intel/meteorlake/Kconfig
index 756d499..5b78fdf 100644
--- a/src/soc/intel/meteorlake/Kconfig
+++ b/src/soc/intel/meteorlake/Kconfig
@@ -324,6 +324,7 @@
select VBOOT_VBNV_CMOS
select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
select VBOOT_X86_SHA256_ACCELERATION
+ select VBOOT_X86_RSA_ACCELERATION
# Default hash block size is 1KiB. Increasing it to 4KiB to improve
# hashing time as well as read time.