commit 3b84c96eb28b2ac4449f5488de3ebc86bcef507f
author Sona Mathew <sonarebecca.mathew@arm.com> Wed Oct 25 16:48:19 2023 -0500
committer Manish Pandey <manish.pandey2@arm.com> Mon Jan 29 14:06:56 2024 +0000
tree a313582793a660be9d1165b18eb85c8c353274ba
parent 92ff1f11bcb77a2ec86ed0766df4b92ddcea7e6b

feat(cpufeat): add feature detection for FEAT_CSV2_3

This feature provides support to context save the
SCXTNUM_ELx register. FEAT_CSV2_3 implies the implementation
of FEAT_CSV2_2. FEAT_CSV2_3 is supported in AArch64 state only
and is an optional feature in Arm v8.0 implementations.

This patch adds feature detection for v8.9 feature FEAT_CSV2_3,
adds macros for ID_AA64PFR0_EL1.CSV2 bits [59:56] for detecting
FEAT_CSV2_3 and macro for ENABLE_FEAT_CSV2_3.

Change-Id: Ida9f31e832b5f11bd89eebd6cc9f10ddad755c14
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>