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usr / src / sys / contrib / openzfs / include / os / freebsd / spl / sys /

📁 ..
📄 Makefile.am(859 B)
📄 acl.h(7.15 KB)
📄 acl_impl.h(1.52 KB)
📄 atomic.h(5.25 KB)
📄 byteorder.h(2.99 KB)
📄 callb.h(7.01 KB)
📄 ccompat.h(4.02 KB)
📄 ccompile.h(7.92 KB)
📄 cmn_err.h(2.18 KB)
📄 condvar.h(5.72 KB)
📄 console.h(1.48 KB)
📄 cred.h(5.17 KB)
📄 ctype.h(1.8 KB)
📄 debug.h(5.91 KB)
📄 dirent.h(1.68 KB)
📄 disp.h(1.51 KB)
📄 dkio.h(14.73 KB)
📄 extdirent.h(2.17 KB)
📄 file.h(1.8 KB)
📄 freebsd_rwlock.h(1.46 KB)
📄 idmap.h(3.21 KB)
📄 inttypes.h(20 B)
📄 isa_defs.h(19.68 KB)
📄 kidmap.h(1.68 KB)
📄 kmem.h(3.65 KB)
📄 kmem_cache.h(1.96 KB)
📄 kstat.h(7.61 KB)
📄 list.h(1.8 KB)
📄 list_impl.h(1.26 KB)
📄 lock.h(1.79 KB)
📄 misc.h(1.95 KB)
📄 mod_os.h(4.01 KB)
📄 mode.h(20 B)
📄 mount.h(1.65 KB)
📄 mutex.h(2.59 KB)
📄 param.h(1.63 KB)
📄 policy.h(3.47 KB)
📄 proc.h(3.33 KB)
📄 processor.h(1.46 KB)
📄 procfs_list.h(2 KB)
📄 random.h(1.71 KB)
📄 rwlock.h(3.31 KB)
📄 sdt.h(1.76 KB)
📄 sid.h(2.47 KB)
📄 sig.h(2.11 KB)
📄 simd.h(1.68 KB)
📄 simd_x86.h(7.07 KB)
📄 spl_condvar.h(3.04 KB)
📄 string.h(1.64 KB)
📄 strings.h(20 B)
📄 sunddi.h(2.28 KB)
📄 sysmacros.h(11.66 KB)
📄 systeminfo.h(1.45 KB)
📄 systm.h(1.68 KB)
📄 taskq.h(3.75 KB)
📄 thread.h(1.47 KB)
📄 time.h(3 KB)
📄 timer.h(1.65 KB)
📄 trace.h(14 B)
📄 trace_zfs.h(14 B)
📄 types.h(2.99 KB)
📄 types32.h(1.52 KB)
📄 uio.h(2.91 KB)
📄 uuid.h(2.93 KB)
📄 vfs.h(4.55 KB)
📄 vm.h(2.54 KB)
📄 vmsystm.h(1.42 KB)
📄 vnode.h(6.07 KB)
📄 vnode_impl.h(10.47 KB)
📄 zmod.h(1.87 KB)
📄 zone.h(2.29 KB)

Editing: simd_x86.h

/*
 * Copyright (c) 2020 iXsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/proc.h>
#include <sys/systm.h>

#include <machine/pcb.h>
#include <x86/x86_var.h>
#include <x86/specialreg.h>

#define	kfpu_init()		(0)
#define	kfpu_fini()		do {} while (0)
#define	kfpu_allowed()		1
#define	kfpu_initialize(tsk)	do {} while (0)

#define	kfpu_begin() {					\
	if (__predict_false(!is_fpu_kern_thread(0)))		\
		fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX);\
}

#define	kfpu_end()	{			\
	if (__predict_false(curpcb->pcb_flags & PCB_FPUNOSAVE))	\
		fpu_kern_leave(curthread, NULL);	\
}

/*
 * Check if OS supports AVX and AVX2 by checking XCR0
 * Only call this function if CPUID indicates that AVX feature is
 * supported by the CPU, otherwise it might be an illegal instruction.
 */
static inline uint64_t
xgetbv(uint32_t index)
{
	uint32_t eax, edx;
	/* xgetbv - instruction byte code */
	__asm__ __volatile__(".byte 0x0f; .byte 0x01; .byte 0xd0"
	    : "=a" (eax), "=d" (edx)
	    : "c" (index));

return ((((uint64_t)edx)<<32) | (uint64_t)eax);
}

/*
 * Detect register set support
 */
static inline boolean_t
__simd_state_enabled(const uint64_t state)
{
	boolean_t has_osxsave;
	uint64_t xcr0;

has_osxsave = !!(cpu_feature2 & CPUID2_OSXSAVE);

if (!has_osxsave)
		return (B_FALSE);

xcr0 = xgetbv(0);
	return ((xcr0 & state) == state);
}

#define	_XSTATE_SSE_AVX		(0x2 | 0x4)
#define	_XSTATE_AVX512		(0xE0 | _XSTATE_SSE_AVX)

#define	__ymm_enabled() __simd_state_enabled(_XSTATE_SSE_AVX)
#define	__zmm_enabled() __simd_state_enabled(_XSTATE_AVX512)

/*
 * Check if SSE instruction set is available
 */
static inline boolean_t
zfs_sse_available(void)
{
	return (!!(cpu_feature & CPUID_SSE));
}

/*
 * Check if SSE2 instruction set is available
 */
static inline boolean_t
zfs_sse2_available(void)
{
	return (!!(cpu_feature & CPUID_SSE2));
}

/*
 * Check if SSE3 instruction set is available
 */
static inline boolean_t
zfs_sse3_available(void)
{
	return (!!(cpu_feature2 & CPUID2_SSE3));
}

/*
 * Check if SSSE3 instruction set is available
 */
static inline boolean_t
zfs_ssse3_available(void)
{
	return (!!(cpu_feature2 & CPUID2_SSSE3));
}

/*
 * Check if SSE4.1 instruction set is available
 */
static inline boolean_t
zfs_sse4_1_available(void)
{
	return (!!(cpu_feature2 & CPUID2_SSE41));
}

/*
 * Check if SSE4.2 instruction set is available
 */
static inline boolean_t
zfs_sse4_2_available(void)
{
	return (!!(cpu_feature2 & CPUID2_SSE42));
}

/*
 * Check if AVX instruction set is available
 */
static inline boolean_t
zfs_avx_available(void)
{
	boolean_t has_avx;

has_avx = !!(cpu_feature2 & CPUID2_AVX);

return (has_avx && __ymm_enabled());
}

/*
 * Check if AVX2 instruction set is available
 */
static inline boolean_t
zfs_avx2_available(void)
{
	boolean_t has_avx2;

has_avx2 = !!(cpu_stdext_feature & CPUID_STDEXT_AVX2);

return (has_avx2 && __ymm_enabled());
}

/*
 * AVX-512 family of instruction sets:
 *
 * AVX512F	Foundation
 * AVX512CD	Conflict Detection Instructions
 * AVX512ER	Exponential and Reciprocal Instructions
 * AVX512PF	Prefetch Instructions
 *
 * AVX512BW	Byte and Word Instructions
 * AVX512DQ	Double-word and Quadword Instructions
 * AVX512VL	Vector Length Extensions
 *
 * AVX512IFMA	Integer Fused Multiply Add (Not supported by kernel 4.4)
 * AVX512VBMI	Vector Byte Manipulation Instructions
 */

/* Check if AVX512F instruction set is available */
static inline boolean_t
zfs_avx512f_available(void)
{
	boolean_t has_avx512;

has_avx512 = !!(cpu_stdext_feature & CPUID_STDEXT_AVX512F);