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d0cbd9feaf
Just like x86, aarch64 needs to use the fpu_kern(9) API around FPU usage, otherwise we panic promptly at boot as soon as ZFS attempts to do checksum benchmarking. Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de> Signed-off-by: Kyle Evans <kevans@FreeBSD.org> Closes #14715
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* SIMD support:
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*
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* Following functions should be called to determine whether CPU feature
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* is supported. All functions are usable in kernel and user space.
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* If a SIMD algorithm is using more than one instruction set
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* all relevant feature test functions should be called.
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*
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* Supported features:
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* zfs_neon_available()
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* zfs_sha256_available()
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* zfs_sha512_available()
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*/
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#ifndef _FREEBSD_SIMD_AARCH64_H
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#define _FREEBSD_SIMD_AARCH64_H
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#include <sys/types.h>
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#include <sys/ucontext.h>
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#include <machine/elf.h>
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#include <machine/fpu.h>
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#include <machine/md_var.h>
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#include <machine/pcb.h>
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#define kfpu_allowed() 1
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#define kfpu_initialize(tsk) do {} while (0)
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#define kfpu_begin() do { \
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if (__predict_false(!is_fpu_kern_thread(0))) \
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fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX); \
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} while (0)
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#define kfpu_end() do { \
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if (__predict_false(curthread->td_pcb->pcb_fpflags & PCB_FP_NOSAVE)) \
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fpu_kern_leave(curthread, NULL); \
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} while (0)
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#define kfpu_init() (0)
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#define kfpu_fini() do {} while (0)
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/*
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* Check if NEON is available
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*/
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static inline boolean_t
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zfs_neon_available(void)
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{
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return (elf_hwcap & HWCAP_FP);
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}
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/*
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* Check if SHA256 is available
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*/
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static inline boolean_t
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zfs_sha256_available(void)
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{
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return (elf_hwcap & HWCAP_SHA2);
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}
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/*
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* Check if SHA512 is available
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*/
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static inline boolean_t
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zfs_sha512_available(void)
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{
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return (elf_hwcap & HWCAP_SHA512);
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}
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#endif /* _FREEBSD_SIMD_AARCH64_H */
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