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arm64: neon: replace generic definition of may_use_simd()

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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@linaro.org>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel 2017-08-03 17:23:19 +01:00 committed by Catalin Marinas
parent 16f73eb02d
commit f960181d5d
2 changed files with 23 additions and 1 deletions
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1
arch/arm64/include/asm/Kbuild
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@ -20,7 +20,6 @@ generic-y += rwsem.h
generic-y += segment.h
generic-y += serial.h
generic-y += set_memory.h
generic-y += simd.h
generic-y += sizes.h
generic-y += switch_to.h
generic-y += trace_clock.h

23
arch/arm64/include/asm/simd.h Normal file
View file

@ -0,0 +1,23 @@
/*
* Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
*
* 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/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