tree 4a0518de3915a93f87acb2a373a1f399a8b7f5c1
parent c735f1c04a2542840c9a090e2d0efff8a332a2ef
author Andre Przywara <andre.przywara@arm.com> 1668703329 +0000
committer Andre Przywara <andre.przywara@arm.com> 1679492002 +0000

refactor(cpufeat): align FEAT_SB to new feature handling

FEAT_SB introduces a new speculation barrier instruction, that is more
lightweight than a "dsb; isb" combination. We use that in a hot path,
so cannot afford and don't want a runtime detection mechanism.
Nevertheless align the implementation of the feature detection part
with the other features, but renaming the detection function, and
updating the FEAT_DETECTION code. Also update the documentation.

Change-Id: I2b86dfd1ad259c3bb99ab5186e2911ace454b54c
Signed-off-by: Andre Przywara <andre.przywara@arm.com>