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>
6 files changed
