feat(sme): enable SME2 functionality for NS world
FEAT_SME2 is an extension of FEAT_SME and an optional feature
from v9.2. Its an extension of SME, wherein it not only
processes matrix operations efficiently, but also provides
outer-product instructions to accelerate matrix operations.
It affords instructions for multi-vector operations.
Further, it adds an 512 bit architectural register ZT0.
This patch implements all the changes introduced with FEAT_SME2
to ensure that the instructions are allowed to access ZT0
register from Non-secure lower exception levels.
Additionally, it adds support to ensure FEAT_SME2 is aligned
with the existing FEATURE DETECTION mechanism, and documented.
Change-Id: Iee0f61943304a9cfc3db8f986047b1321d0a6463
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
diff --git a/include/arch/aarch64/arch_features.h b/include/arch/aarch64/arch_features.h
index 40ab82f..a0141de 100644
--- a/include/arch/aarch64/arch_features.h
+++ b/include/arch/aarch64/arch_features.h
@@ -657,4 +657,17 @@
return read_feat_sme_id_field() >= ID_AA64PFR1_EL1_SME_SUPPORTED;
}
+static inline bool is_feat_sme2_supported(void)
+{
+ if (ENABLE_SME2_FOR_NS == FEAT_STATE_DISABLED) {
+ return false;
+ }
+
+ if (ENABLE_SME2_FOR_NS == FEAT_STATE_ALWAYS) {
+ return true;
+ }
+
+ return read_feat_sme_id_field() >= ID_AA64PFR1_EL1_SME2_SUPPORTED;
+}
+
#endif /* ARCH_FEATURES_H */