tree d0d67a22cfa0d07fce82b5120bd7b817c7724840
parent 902c902d753a0b27d64e5de76a8d1ee0b5972f39
author Andre Przywara <andre.przywara@arm.com> 1674822349 +0000
committer Andre Przywara <andre.przywara@arm.com> 1679492002 +0000

refactor(cpufeat): enable FEAT_TWED for FEAT_STATE_CHECKED

At the moment we only support FEAT_TWED to be either unconditionally
compiled in, or to be not supported at all.

Add support for runtime detection (ENABLE_FEAT_TWED=2), by splitting
is_armv8_6_twed_present() into an ID register reading function and a
second function to report the support status. That function considers
both build time settings and runtime information (if needed), and is
used before we set the trap delay time.

Change the FVP platform default to the now supported dynamic option (=2),
so the right decision can be made by the code at runtime.

Change-Id: I58626230ef0af49886c0a197abace01e81f661d2
Signed-off-by: Andre Przywara <andre.przywara@arm.com>