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>
diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index e9d22b6..b88d6c6 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -197,6 +197,7 @@
#define ID_AA64PFR0_CSV2_MASK ULL(0xf)
#define ID_AA64PFR0_CSV2_LENGTH U(4)
#define ID_AA64PFR0_CSV2_2_SUPPORTED ULL(0x2)
+#define ID_AA64PFR0_CSV2_3_SUPPORTED ULL(0x3)
#define ID_AA64PFR0_FEAT_RME_SHIFT U(52)
#define ID_AA64PFR0_FEAT_RME_MASK ULL(0xf)