[coreboot-gerrit] Change in coreboot[master]: amd/picasso/verstage: replace rsa accel with modexp

[Kangheui Won (Code Review)]

Hello build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/45987

to look at the new patch set (#4).

Change subject: amd/picasso/verstage: replace rsa accel with modexp
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amd/picasso/verstage: replace rsa accel with modexp

Replace vb2ex_hwcrypto_rsa_verify_digest with vb2ex_hwcrypto_modexp.

Instead of using hardware acceleration for whole RSA process,
acclerating only calculation part(modexp) increases transparency
without affecting boot time.

BUG=b:169157796
BRANCH=zork
TEST=build and flash, check time spent on RSA is not changed

Change-Id: I085f043bf2014615d2c9db6df0b7947ee84b9546
Signed-off-by: Kangheui Won 
---
M src/soc/amd/picasso/psp_verstage/vboot_crypto.c
1 file changed, 31 insertions(+), 27 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/87/45987/4