Add SHA2 SIMD feature tests for Linux
These are added: - zfs_neon_available() for arm and aarch64 - zfs_sha256_available() for arm and aarch64 - zfs_sha512_available() for aarch64 - zfs_shani_available() for x86_64 Tested-by: Rich Ercolani <rincebrain@gmail.com> Tested-by: Sebastian Gottschall <s.gottschall@dd-wrt.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de> Co-Authored-By: Sebastian Gottschall <s.gottschall@dd-wrt.com> Closes #13741
This commit is contained in:
Tino Reichardt
Brian Behlendorf
parent
589143c225
commit
cef1253135
@ -10,6 +10,7 @@ kernel_linux_HEADERS = \
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%D%/kernel/linux/percpu_compat.h \
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%D%/kernel/linux/simd.h \
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%D%/kernel/linux/simd_aarch64.h \
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%D%/kernel/linux/simd_arm.h \
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%D%/kernel/linux/simd_powerpc.h \
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%D%/kernel/linux/simd_x86.h \
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%D%/kernel/linux/utsname_compat.h \
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@ -28,13 +28,16 @@
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#if defined(__x86)
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#include <linux/simd_x86.h>
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#elif defined(__arm__)
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#include <linux/simd_arm.h>
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#elif defined(__aarch64__)
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#include <linux/simd_aarch64.h>
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#elif defined(__powerpc__)
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#include <linux/simd_powerpc.h>
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#else
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#else
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#define kfpu_allowed() 0
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#define kfpu_begin() do {} while (0)
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#define kfpu_end() do {} while (0)
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@ -18,8 +18,11 @@
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (C) 2016 Romain Dolbeau <romain@dolbeau.org>.
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* Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
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* Copyright (C) 2022 Sebastian Gottschall <s.gottschall@dd-wrt.com>
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*/
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/*
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@ -31,24 +34,83 @@
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* kfpu_end()
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* kfpu_init()
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* kfpu_fini()
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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 _LINUX_SIMD_AARCH64_H
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#define _LINUX_SIMD_AARCH64_H
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#include <sys/isa_defs.h>
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#if defined(__aarch64__)
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#include <sys/types.h>
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#include <asm/neon.h>
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#include <asm/elf.h>
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#include <asm/hwcap.h>
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
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#include <asm/sysreg.h>
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#else
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#define sys_reg(op0, op1, crn, crm, op2) ( \
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((op0) << Op0_shift) | \
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((op1) << Op1_shift) | \
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((crn) << CRn_shift) | \
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((crm) << CRm_shift) | \
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((op2) << Op2_shift))
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#endif
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#define ID_AA64PFR0_EL1 sys_reg(3, 0, 0, 1, 0)
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#define ID_AA64ISAR0_EL1 sys_reg(3, 0, 0, 6, 0)
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#define kfpu_allowed() 1
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#define kfpu_begin() kernel_neon_begin()
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#define kfpu_end() kernel_neon_end()
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#define kfpu_init() 0
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#define kfpu_fini() ((void) 0)
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#define kfpu_init() (0)
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#define kfpu_fini() do {} while (0)
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#endif /* __aarch64__ */
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#define get_ftr(id) { \
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unsigned long __val; \
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asm("mrs %0, "#id : "=r" (__val)); \
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__val; \
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}
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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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unsigned long ftr = ((get_ftr(ID_AA64PFR0_EL1)) >> 16) & 0xf;
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return (ftr == 0 || ftr == 1);
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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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unsigned long ftr = ((get_ftr(ID_AA64ISAR0_EL1)) >> 12) & 0x3;
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return (ftr & 0x1);
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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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unsigned long ftr = ((get_ftr(ID_AA64ISAR0_EL1)) >> 12) & 0x3;
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return (ftr & 0x2);
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}
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#endif /* _LINUX_SIMD_AARCH64_H */
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80
include/os/linux/kernel/linux/simd_arm.h
Normal file
80
include/os/linux/kernel/linux/simd_arm.h
Normal file
@ -0,0 +1,80 @@
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
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*/
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/*
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* USER API:
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*
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* Kernel fpu methods:
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* kfpu_allowed()
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* kfpu_begin()
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* kfpu_end()
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* kfpu_init()
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* kfpu_fini()
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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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*/
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#ifndef _LINUX_SIMD_ARM_H
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#define _LINUX_SIMD_ARM_H
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#include <sys/types.h>
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#include <asm/neon.h>
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#include <asm/elf.h>
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#include <asm/hwcap.h>
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#define kfpu_allowed() 1
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#define kfpu_begin() kernel_neon_begin()
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#define kfpu_end() kernel_neon_end()
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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_NEON);
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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_hwcap2 & HWCAP2_SHA2);
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}
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#endif /* _LINUX_SIMD_ARM_H */
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@ -50,9 +50,6 @@
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#ifndef _LINUX_SIMD_POWERPC_H
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#define _LINUX_SIMD_POWERPC_H
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/* only for __powerpc__ */
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#if defined(__powerpc__)
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#include <linux/preempt.h>
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#include <linux/export.h>
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#include <linux/sched.h>
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@ -134,6 +131,4 @@ zfs_isa207_available(void)
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return (cpu_has_feature(CPU_FTR_ARCH_207S));
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}
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#endif /* defined(__powerpc) */
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#endif /* _LINUX_SIMD_POWERPC_H */
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@ -53,6 +53,8 @@
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* zfs_bmi1_available()
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* zfs_bmi2_available()
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*
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* zfs_shani_available()
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*
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* zfs_avx512f_available()
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* zfs_avx512cd_available()
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* zfs_avx512er_available()
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@ -586,6 +588,19 @@ zfs_movbe_available(void)
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#endif
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}
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/*
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* Check if SHA_NI instruction set is available
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*/
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static inline boolean_t
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zfs_shani_available(void)
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{
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#if defined(X86_FEATURE_SHA_NI)
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return (!!boot_cpu_has(X86_FEATURE_SHA_NI));
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#else
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return (B_FALSE);
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#endif
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}
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/*
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* AVX-512 family of instruction sets:
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*
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