1*2a58b312SMartin Matuska /* 2*2a58b312SMartin Matuska * CDDL HEADER START 3*2a58b312SMartin Matuska * 4*2a58b312SMartin Matuska * The contents of this file are subject to the terms of the 5*2a58b312SMartin Matuska * Common Development and Distribution License (the "License"). 6*2a58b312SMartin Matuska * You may not use this file except in compliance with the License. 7*2a58b312SMartin Matuska * 8*2a58b312SMartin Matuska * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*2a58b312SMartin Matuska * or https://opensource.org/licenses/CDDL-1.0. 10*2a58b312SMartin Matuska * See the License for the specific language governing permissions 11*2a58b312SMartin Matuska * and limitations under the License. 12*2a58b312SMartin Matuska * 13*2a58b312SMartin Matuska * When distributing Covered Code, include this CDDL HEADER in each 14*2a58b312SMartin Matuska * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*2a58b312SMartin Matuska * If applicable, add the following below this CDDL HEADER, with the 16*2a58b312SMartin Matuska * fields enclosed by brackets "[]" replaced with your own identifying 17*2a58b312SMartin Matuska * information: Portions Copyright [yyyy] [name of copyright owner] 18*2a58b312SMartin Matuska * 19*2a58b312SMartin Matuska * CDDL HEADER END 20*2a58b312SMartin Matuska */ 21*2a58b312SMartin Matuska 22*2a58b312SMartin Matuska /* 23*2a58b312SMartin Matuska * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de> 24*2a58b312SMartin Matuska */ 25*2a58b312SMartin Matuska 26*2a58b312SMartin Matuska /* 27*2a58b312SMartin Matuska * USER API: 28*2a58b312SMartin Matuska * 29*2a58b312SMartin Matuska * Kernel fpu methods: 30*2a58b312SMartin Matuska * kfpu_allowed() 31*2a58b312SMartin Matuska * kfpu_begin() 32*2a58b312SMartin Matuska * kfpu_end() 33*2a58b312SMartin Matuska * kfpu_init() 34*2a58b312SMartin Matuska * kfpu_fini() 35*2a58b312SMartin Matuska * 36*2a58b312SMartin Matuska * SIMD support: 37*2a58b312SMartin Matuska * 38*2a58b312SMartin Matuska * Following functions should be called to determine whether CPU feature 39*2a58b312SMartin Matuska * is supported. All functions are usable in kernel and user space. 40*2a58b312SMartin Matuska * If a SIMD algorithm is using more than one instruction set 41*2a58b312SMartin Matuska * all relevant feature test functions should be called. 42*2a58b312SMartin Matuska * 43*2a58b312SMartin Matuska * Supported features: 44*2a58b312SMartin Matuska * zfs_neon_available() 45*2a58b312SMartin Matuska * zfs_sha256_available() 46*2a58b312SMartin Matuska */ 47*2a58b312SMartin Matuska 48*2a58b312SMartin Matuska #ifndef _LINUX_SIMD_ARM_H 49*2a58b312SMartin Matuska #define _LINUX_SIMD_ARM_H 50*2a58b312SMartin Matuska 51*2a58b312SMartin Matuska #include <sys/types.h> 52*2a58b312SMartin Matuska #include <asm/neon.h> 53*2a58b312SMartin Matuska #include <asm/elf.h> 54*2a58b312SMartin Matuska #include <asm/hwcap.h> 55*2a58b312SMartin Matuska 56*2a58b312SMartin Matuska #define kfpu_allowed() 1 57*2a58b312SMartin Matuska #define kfpu_begin() kernel_neon_begin() 58*2a58b312SMartin Matuska #define kfpu_end() kernel_neon_end() 59*2a58b312SMartin Matuska #define kfpu_init() (0) 60*2a58b312SMartin Matuska #define kfpu_fini() do {} while (0) 61*2a58b312SMartin Matuska 62*2a58b312SMartin Matuska /* 63*2a58b312SMartin Matuska * Check if NEON is available 64*2a58b312SMartin Matuska */ 65*2a58b312SMartin Matuska static inline boolean_t 66*2a58b312SMartin Matuska zfs_neon_available(void) 67*2a58b312SMartin Matuska { 68*2a58b312SMartin Matuska return (elf_hwcap & HWCAP_NEON); 69*2a58b312SMartin Matuska } 70*2a58b312SMartin Matuska 71*2a58b312SMartin Matuska /* 72*2a58b312SMartin Matuska * Check if SHA256 is available 73*2a58b312SMartin Matuska */ 74*2a58b312SMartin Matuska static inline boolean_t 75*2a58b312SMartin Matuska zfs_sha256_available(void) 76*2a58b312SMartin Matuska { 77*2a58b312SMartin Matuska return (elf_hwcap2 & HWCAP2_SHA2); 78*2a58b312SMartin Matuska } 79*2a58b312SMartin Matuska 80*2a58b312SMartin Matuska #endif /* _LINUX_SIMD_ARM_H */ 81