c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-03-10 20:36:21 +03:00
Code Issues Packages Projects Releases Wiki Activity

simd: detect and surface support for Intel SHA512 extensions

Browse Source 
Recent Intel CPUs (starting with Arrow Lake and Lunar Lake) include new
vectorised SHA512 instructions. Detect them and make them available to
the rest of the system.

Note the internal name "sha512ext". This is to disambiguate from other
uses of "sha512".

Sponsored-by: TrueNAS
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Attila Fülöp <attila@fueloep.org>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes #18233
This commit is contained in:
Rob Norris 2026-02-17 13:55:20 +11:00 committed by Brian Behlendorf
parent 6495dafd58
commit 3547a358fd
4 changed files with 53 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
config/toolchain-simd.m4
View File

@ -27,6 +27,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD], [
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_MOVBE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_VAES
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_VPCLMULQDQ
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SHA512EXT
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVEOPT
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVES
@ -491,6 +492,27 @@ AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_VPCLMULQDQ], [
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SHA512EXT
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SHA512EXT], [
AC_MSG_CHECKING([whether host toolchain supports SHA512])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
int main()
{
__asm__ __volatile__("vsha512msg2 %ymm5, %ymm6");
return (0);
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_SHA512EXT], 1, [Define if host toolchain supports SHA512])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE
dnl #

14
include/os/linux/kernel/linux/simd_x86.h
View File

@ -21,6 +21,7 @@
*/
/*
* Copyright (C) 2016 Gvozden Neskovic <neskovic@compeng.uni-frankfurt.de>.
* Copyright (c) 2026, TrueNAS.
*/
/*
@ -623,6 +624,19 @@ zfs_vpclmulqdq_available(void)
#endif
}
/*
* Check if SHA512 instructions are available
*/
static inline boolean_t
zfs_sha512ext_available(void)
{
#if defined(X86_FEATURE_SHA512)
return (!!boot_cpu_has(X86_FEATURE_SHA512));
#else
return (B_FALSE);
#endif
}
/*
* Check if SHA_NI instruction set is available
*/

16
lib/libspl/include/sys/simd.h
View File

@ -23,6 +23,7 @@
/*
* Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
* Copyright (c) 2026, TrueNAS.
*/
#ifndef _LIBSPL_SYS_SIMD_H
@ -104,7 +105,8 @@ typedef enum cpuid_inst_sets {
MOVBE,
SHA_NI,
VAES,
VPCLMULQDQ
VPCLMULQDQ,
SHA512EXT,
} cpuid_inst_sets_t;
/*
@ -132,6 +134,7 @@ typedef struct cpuid_feature_desc {
#define _VAES_BIT (1U << 9)
#define _VPCLMULQDQ_BIT (1U << 10)
#define _SHA_NI_BIT (1U << 29)
#define _SHA512_BIT (1U << 0)
/*
* Descriptions of supported instruction sets
@ -163,6 +166,7 @@ static const cpuid_feature_desc_t cpuid_features[] = {
[SHA_NI] = {7U, 0U, _SHA_NI_BIT, EBX },
[VAES] = {7U, 0U, _VAES_BIT, ECX },
[VPCLMULQDQ] = {7U, 0U, _VPCLMULQDQ_BIT, ECX },
[SHA512EXT] = {7U, 1U, _SHA512_BIT, EAX },
};
/*
@ -239,6 +243,7 @@ CPUID_FEATURE_CHECK(movbe, MOVBE);
CPUID_FEATURE_CHECK(shani, SHA_NI);
CPUID_FEATURE_CHECK(vaes, VAES);
CPUID_FEATURE_CHECK(vpclmulqdq, VPCLMULQDQ);
CPUID_FEATURE_CHECK(sha512ext, SHA512EXT);
/*
* Detect register set support
@ -407,6 +412,15 @@ zfs_vpclmulqdq_available(void)
return (__cpuid_has_vpclmulqdq());
}
/*
* Check if SHA512 instructions are available
*/
static inline boolean_t
zfs_sha512ext_available(void)
{
return (__cpuid_has_sha512ext());
}
/*
* AVX-512 family of instruction sets:
*

2
module/zcommon/simd_stat.c
View File

@ -122,6 +122,8 @@ simd_stat_kstat_data(char *buf, size_t size, void *data)
"vaes", zfs_vaes_available());
off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
"vpclmulqdq", zfs_vpclmulqdq_available());
off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
"sha512ext", zfs_sha512ext_available());
off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
"osxsave", boot_cpu_has(X86_FEATURE_OSXSAVE));