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Add PPC cpu feature tests for FreeBSD and Linux
Add needed cpu feature tests for powerpc architecture. Overview: zfs_altivec_available() - needed by RAID-Z zfs_vsx_available() - needed by BLAKE3 zfs_isa207_available() - needed by SHA2 Part 1 - Userspace - use getauxval() for Linux and elf_aux_info() for FreeBSD - direct including <sys/auxv.h> fails with double definitions - so we self define the needed functions and definitions Part 2 - Kernel space FreeBSD - use exported cpu_features of <powerpc/cpu.h> Part 3 - Kernel space Linux - use cpu_has_feature() function of <asm/cpufeature.h> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de> Closes openzfs#13725
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| /* | ||
| * CDDL HEADER START | ||
| * | ||
| * The contents of this file are subject to the terms of the | ||
| * Common Development and Distribution License (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * | ||
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | ||
| * or https://opensource.org/licenses/CDDL-1.0. | ||
| * See the License for the specific language governing permissions | ||
| * and limitations under the License. | ||
| * | ||
| * When distributing Covered Code, include this CDDL HEADER in each | ||
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | ||
| * If applicable, add the following below this CDDL HEADER, with the | ||
| * fields enclosed by brackets "[]" replaced with your own identifying | ||
| * information: Portions Copyright [yyyy] [name of copyright owner] | ||
| * | ||
| * CDDL HEADER END | ||
| */ | ||
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| /* | ||
| * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de> | ||
| */ | ||
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| /* | ||
| * USER API: | ||
| * | ||
| * Kernel fpu methods: | ||
| * kfpu_allowed() | ||
| * kfpu_begin() | ||
| * kfpu_end() | ||
| * kfpu_init() | ||
| * kfpu_fini() | ||
| * | ||
| * SIMD support: | ||
| * | ||
| * Following functions should be called to determine whether CPU feature | ||
| * is supported. All functions are usable in kernel and user space. | ||
| * If a SIMD algorithm is using more than one instruction set | ||
| * all relevant feature test functions should be called. | ||
| * | ||
| * Supported features: | ||
| * zfs_altivec_available() | ||
| * zfs_vsx_available() | ||
| * zfs_isa207_available() | ||
| */ | ||
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| #ifndef _FREEBSD_SIMD_POWERPC_H | ||
| #define _FREEBSD_SIMD_POWERPC_H | ||
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| #include <sys/types.h> | ||
| #include <sys/cdefs.h> | ||
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| #include <machine/pcb.h> | ||
| #include <powerpc/cpu.h> | ||
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| #define kfpu_allowed() 1 | ||
| #define kfpu_initialize(tsk) do {} while (0) | ||
| #define kfpu_begin() do {} while (0) | ||
| #define kfpu_end() do {} while (0) | ||
| #define kfpu_init() (0) | ||
| #define kfpu_fini() do {} while (0) | ||
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| /* | ||
| * Check if Altivec is available | ||
| */ | ||
| static inline boolean_t | ||
| zfs_altivec_available(void) | ||
| { | ||
| return ((cpu_features & PPC_FEATURE_HAS_ALTIVEC) != 0); | ||
| } | ||
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| /* | ||
| * Check if VSX is available | ||
| */ | ||
| static inline boolean_t | ||
| zfs_vsx_available(void) | ||
| { | ||
| return ((cpu_features & PPC_FEATURE_HAS_VSX) != 0); | ||
| } | ||
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| /* | ||
| * Check if POWER ISA 2.07 is available (SHA2) | ||
| */ | ||
| static inline boolean_t | ||
| zfs_isa207_available(void) | ||
| { | ||
| return ((cpu_features2 & PPC_FEATURE2_ARCH_2_07) != 0); | ||
| } |
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