In preparation of modifying the logic that decides whether kernel mode
NEON is allowable, which is required for SVE support, introduce an
implementation of may_use_simd() that reflects the current reality, i.e.,
that SIMD is allowed in any context.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
arch/arm64/include/asm/Kbuild | 1 -
arch/arm64/include/asm/simd.h | 24 ++++++++++++++++++++
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index a7a97a608033..3c469b557ee8 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -31,7 +31,6 @@ generic-y += sembuf.h
generic-y += serial.h
generic-y += set_memory.h
generic-y += shmbuf.h
-generic-y += simd.h
generic-y += sizes.h
generic-y += socket.h
generic-y += sockios.h
diff --git a/arch/arm64/include/asm/simd.h b/arch/arm64/include/asm/simd.h
new file mode 100644
index 000000000000..f8aa7b3a0140
--- /dev/null
+++ b/arch/arm64/include/asm/simd.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#ifndef __ASM_SIMD_H
+#define __ASM_SIMD_H
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+/*
+ * may_use_simd - whether it is allowable at this time to issue SIMD
+ * instructions or access the SIMD register file
+ */
+static __must_check inline bool may_use_simd(void)
+{
+ return true;
+}
+
+#endif
--
2.7.4
