feat(fpmr): disable FPMR trap
This patch enables support of FEAT_FPMR by enabling access
to FPMR register. It achieves it by setting the EnFPM bit of
SCR_EL3. This feature is currently enabled for NS world only.
Reference:
https://developer.arm.com/documentation/109697/2024_09/
Feature-descriptions/The-Armv9-5-architecture-extension?lang=en
Change-Id: I580c409b9b22f8ead0737502280fb9093a3d5dd2
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
diff --git a/include/lib/extensions/fpmr.h b/include/lib/extensions/fpmr.h
new file mode 100644
index 0000000..bc3ee9e
--- /dev/null
+++ b/include/lib/extensions/fpmr.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef FPMR_H
+#define FPMR_H
+
+#include <context.h>
+
+#if ENABLE_FEAT_FPMR
+void fpmr_enable_per_world(per_world_context_t *per_world_ctx);
+#else
+static inline void fpmr_enable_per_world(per_world_context_t *per_world_ctx)
+{
+}
+#endif /* ENABLE_FEAT_FPMR */
+
+#endif /* FPMR_H */