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814f5415d3
Implement the ksimd scoped guard API so that it can be used by code that supports both ARM and arm64. Reviewed-by: Kees Cook <kees@kernel.org> Reviewed-by: Eric Biggers <ebiggers@kernel.org> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
23 lines
505 B
C
23 lines
505 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SIMD_H
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#define _ASM_SIMD_H
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#include <linux/cleanup.h>
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#include <linux/compiler_attributes.h>
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#include <linux/preempt.h>
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#include <linux/types.h>
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#include <asm/neon.h>
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static __must_check inline bool may_use_simd(void)
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{
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return IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && !in_hardirq()
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&& !irqs_disabled();
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}
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DEFINE_LOCK_GUARD_0(ksimd, kernel_neon_begin(), kernel_neon_end())
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#define scoped_ksimd() scoped_guard(ksimd)
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#endif /* _ASM_SIMD_H */
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