tree 16bd144ce599fdd672de628789403e779de60fdc
parent fde6a3470cd92e623e6394abbe7e5830669555fc
author Julius Werner <jwerner@chromium.org> 1575497410 -0800
committer Commit Bot <commit-bot@chromium.org> 1575587392 +0000

Makefile: Make loop unrolling fully controllable by the caller

We recently reactivated the -DUNROLL_LOOPS code for x86 devices.
Unfortunatley, this seems to lead to code size problems for early
firmware stages on certain x86 boards (CB:37475). The biggest speedup
with unrolled loops was observed during kernel verification anyway
(which hashes orders of magnitude more data than firmware verification),
so let's make this fully configurable by the calling firmware and only
enable it from depthcharge. Pre-RAM coreboot changes are probably better
served with the smaller implementation anyway (and this will only become
more important as we move to CBFS per-file hashing and need hash
algorithms in every stage).

BRANCH=None
BUG=None
TEST=None

Cq-Depend: chromium:1951413
Change-Id: I87eaa14299cae0ee0d0b4a098d638b6bccdaf75b
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1951782
Reviewed-by: Aaron Durbin <adurbin@google.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>