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3547a358fd
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
213 lines
6.9 KiB
C
213 lines
6.9 KiB
C
// SPDX-License-Identifier: CDDL-1.0
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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 2024 Google, Inc. All rights reserved.
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*/
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#include <sys/zfs_context.h>
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#include <sys/kstat.h>
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#include <sys/simd.h>
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#ifdef _KERNEL
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#ifdef __linux__
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#include <linux/simd.h>
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#endif /* __linux__ */
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kstat_t *simd_stat_kstat;
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#endif /* _KERNEL */
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#ifdef _KERNEL
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/* Sometimes, we don't define these at all. */
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#ifndef HAVE_KERNEL_FPU
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#define HAVE_KERNEL_FPU (0)
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#endif
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#ifndef HAVE_KERNEL_NEON
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#define HAVE_KERNEL_NEON (0)
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#endif
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#ifndef HAVE_KERNEL_FPU_INTERNAL
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#define HAVE_KERNEL_FPU_INTERNAL (0)
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#endif
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#ifndef HAVE_UNDERSCORE_KERNEL_FPU
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#define HAVE_UNDERSCORE_KERNEL_FPU (0)
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#endif
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#define SIMD_STAT_PRINT(s, feat, val) \
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kmem_scnprintf(s + off, MAX(4095-off, 0), "%-16s\t%1d\n", feat, (val))
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static int
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simd_stat_kstat_data(char *buf, size_t size, void *data)
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{
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(void) data;
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static char simd_stat_kstat_payload[4096] = {0};
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static int off = 0;
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#ifdef __linux__
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if (off == 0) {
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"kfpu_allowed", kfpu_allowed());
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#if defined(__x86_64__) || defined(__i386__)
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"kfpu", HAVE_KERNEL_FPU);
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"kfpu_internal", HAVE_KERNEL_FPU_INTERNAL);
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"__kernel_fpu", HAVE_UNDERSCORE_KERNEL_FPU);
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sse", zfs_sse_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sse2", zfs_sse2_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sse3", zfs_sse3_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"ssse3", zfs_ssse3_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sse41", zfs_sse4_1_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sse42", zfs_sse4_2_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx", zfs_avx_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx2", zfs_avx2_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512f", zfs_avx512f_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512cd", zfs_avx512cd_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512er", zfs_avx512er_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512pf", zfs_avx512pf_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512bw", zfs_avx512bw_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512dq", zfs_avx512dq_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512vl", zfs_avx512vl_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512ifma", zfs_avx512ifma_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"avx512vbmi", zfs_avx512vbmi_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"ymm", __ymm_enabled());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"zmm", __zmm_enabled());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"bmi1", zfs_bmi1_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"bmi2", zfs_bmi2_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"aes", zfs_aes_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"pclmulqdq", zfs_pclmulqdq_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"movbe", zfs_movbe_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"vaes", zfs_vaes_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"vpclmulqdq", zfs_vpclmulqdq_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sha512ext", zfs_sha512ext_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"osxsave", boot_cpu_has(X86_FEATURE_OSXSAVE));
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"xsaves", static_cpu_has(X86_FEATURE_XSAVES));
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"xsaveopt", static_cpu_has(X86_FEATURE_XSAVEOPT));
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"xsave", static_cpu_has(X86_FEATURE_XSAVE));
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"fxsr", static_cpu_has(X86_FEATURE_FXSR));
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#endif /* __x86__ */
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#if defined(__arm__) || defined(__aarch64__)
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"kernel_neon", HAVE_KERNEL_NEON);
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#if defined(CONFIG_KERNEL_MODE_NEON)
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"kernel_mode_neon", CONFIG_KERNEL_MODE_NEON);
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#endif /* CONFIG_KERNEL_MODE_NEON */
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"neon", zfs_neon_available());
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sha256", zfs_sha256_available());
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#if defined(__aarch64__)
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/*
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* This technically can exist on 32b ARM but we don't
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* define hooks to check for it and I didn't want to
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* learn enough ARM ASM to add one.
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*/
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off += SIMD_STAT_PRINT(simd_stat_kstat_payload,
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"sha512", zfs_sha512_available());
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#endif /* __aarch64__ */
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#endif /* __arm__ */
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/* We want to short-circuit this on unsupported platforms. */
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off += 1;
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}
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kmem_scnprintf(buf, MIN(off, size), "%s", simd_stat_kstat_payload);
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#endif /* __linux__ */
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return (0);
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}
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#endif /* _KERNEL */
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void
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simd_stat_init(void)
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{
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static boolean_t simd_stat_initialized = B_FALSE;
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if (!simd_stat_initialized) {
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#if defined(_KERNEL)
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/* Install kstats for all implementations */
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simd_stat_kstat = kstat_create("zfs", 0, "simd", "misc",
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KSTAT_TYPE_RAW, 0, KSTAT_FLAG_VIRTUAL);
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if (simd_stat_kstat != NULL) {
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simd_stat_kstat->ks_data = (void*)(uintptr_t)1;
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simd_stat_kstat->ks_ndata = 1;
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simd_stat_kstat->ks_flags |= KSTAT_FLAG_NO_HEADERS;
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kstat_set_raw_ops(simd_stat_kstat,
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NULL,
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simd_stat_kstat_data,
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NULL);
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kstat_install(simd_stat_kstat);
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}
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#endif /* _KERNEL */
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}
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/* Finish initialization */
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simd_stat_initialized = B_TRUE;
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}
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void
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simd_stat_fini(void)
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{
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#if defined(_KERNEL)
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if (simd_stat_kstat != NULL) {
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kstat_delete(simd_stat_kstat);
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simd_stat_kstat = NULL;
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}
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#endif
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}
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#ifdef _KERNEL
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EXPORT_SYMBOL(simd_stat_init);
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EXPORT_SYMBOL(simd_stat_fini);
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#endif
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