tree 0f97f914992421ff48d2ff7d32f6b0933848a568
parent 6a558ef5be4703b9ff61bdc92c4a6f43d8cc406b
author Kangheui Won <khwon@chromium.org> 1611201120 +1100
committer Commit Bot <commit-bot@chromium.org> 1625104314 +0000

vboot: add x86 SHA256 ext support

Latest x86 processors have SHA256 extension which can accelerate hash
computation in vboot.

This is especially helpful on low-end devices where sha256 computation
takes 70ms-90ms, with this CL it is reduced to 10ms.

BUG=b:162551138
BRANCH=zork
TEST=build and boot, check cbmem -t
TEST=run vb2_sha256_x86_tests on dirinboz

Signed-off-by: Kangheui Won <khwon@chromium.org>
Change-Id: I50e123048d54d5061e8d8e0e0ae804a416130948
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2639457
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Commit-Queue: Raul E Rangel <rrangel@chromium.org>