Add SHA2 SIMD feature tests for FreeBSD

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

Changes:
- simd_powerpc.h: change license from CDDL to BSD

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>
Closes #13741

6 files changed, 203 insertions, 28 deletions

diff --git a/include/os/freebsd/spl/sys/mod_os.h b/include/os/freebsd/spl/sys/mod_os.h
index 48e8a2adb8d2..77ce75ca3f11 100644
--- a/include/os/freebsd/spl/sys/mod_os.h
+++ b/include/os/freebsd/spl/sys/mod_os.h
@@ -97,6 +97,12 @@
 #define	blake3_param_set_args(var) \
     CTLTYPE_STRING, NULL, 0, blake3_param, "A"
 
+#define	sha256_param_set_args(var) \
+    CTLTYPE_STRING, NULL, 0, sha256_param, "A"
+
+#define	sha512_param_set_args(var) \
+    CTLTYPE_STRING, NULL, 0, sha512_param, "A"
+
 #include <sys/kernel.h>
 #define	module_init(fn) \
 static void \
diff --git a/include/os/freebsd/spl/sys/simd.h b/include/os/freebsd/spl/sys/simd.h
index 3106e4853c70..4560bb05e978 100644
--- a/include/os/freebsd/spl/sys/simd.h
+++ b/include/os/freebsd/spl/sys/simd.h
@@ -32,6 +32,12 @@
 #if defined(__amd64__) || defined(__i386__)
 #include <sys/simd_x86.h>
 
+#elif defined(__arm__)
+#include <sys/simd_arm.h>
+
+#elif defined(__aarch64__)
+#include <sys/simd_aarch64.h>
+
 #elif defined(__powerpc__)
 #include <sys/simd_powerpc.h>
 
diff --git a/include/os/freebsd/spl/sys/simd_aarch64.h b/include/os/freebsd/spl/sys/simd_aarch64.h
new file mode 100644
index 000000000000..847c2ed29189
--- /dev/null
+++ b/include/os/freebsd/spl/sys/simd_aarch64.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * 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_neon_available()
+ *   zfs_sha256_available()
+ *   zfs_sha512_available()
+ */
+
+#ifndef _FREEBSD_SIMD_AARCH64_H
+#define	_FREEBSD_SIMD_AARCH64_H
+
+#include <sys/types.h>
+#include <machine/elf.h>
+
+#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)
+
+/*
+ * Check if NEON is available
+ */
+static inline boolean_t
+zfs_neon_available(void)
+{
+	return (elf_hwcap & HWCAP_FP);
+}
+
+/*
+ * Check if SHA256 is available
+ */
+static inline boolean_t
+zfs_sha256_available(void)
+{
+	return (elf_hwcap & HWCAP_SHA2);
+}
+
+/*
+ * Check if SHA512 is available
+ */
+static inline boolean_t
+zfs_sha512_available(void)
+{
+	return (elf_hwcap & HWCAP_SHA512);
+}
+
+#endif /* _FREEBSD_SIMD_AARCH64_H */
diff --git a/include/os/freebsd/spl/sys/simd_arm.h b/include/os/freebsd/spl/sys/simd_arm.h
new file mode 100644
index 000000000000..f6362cd6bb54
--- /dev/null
+++ b/include/os/freebsd/spl/sys/simd_arm.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * 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_neon_available()
+ *   zfs_sha256_available()
+ */
+
+#ifndef _FREEBSD_SIMD_ARM_H
+#define	_FREEBSD_SIMD_ARM_H
+
+#include <sys/types.h>
+#include <machine/elf.h>
+
+#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)
+
+/*
+ * Check if NEON is available
+ */
+static inline boolean_t
+zfs_neon_available(void)
+{
+	return (elf_hwcap & HWCAP_NEON);
+}
+
+/*
+ * Check if SHA256 is available
+ */
+static inline boolean_t
+zfs_sha256_available(void)
+{
+	return (elf_hwcap2 & HWCAP2_SHA2);
+}
+
+#endif /* _FREEBSD_SIMD_ARM_H */
diff --git a/include/os/freebsd/spl/sys/simd_powerpc.h b/include/os/freebsd/spl/sys/simd_powerpc.h
index 34d5e23e2fbb..edaab81d15fc 100644
--- a/include/os/freebsd/spl/sys/simd_powerpc.h
+++ b/include/os/freebsd/spl/sys/simd_powerpc.h
@@ -1,38 +1,32 @@
 /*
- * 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.
+ * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
+ * All rights reserved.
  *
- * 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.
+ * 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.
  *
- * 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]
+ * 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.
  *
- * CDDL HEADER END
- */
-
-/*
- * Copyright (C) 2022 Tino Reichardt <milky-zfs@mcmilk.de>
+ * $FreeBSD$
  */
 
 /*
- * 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
diff --git a/include/os/freebsd/spl/sys/simd_x86.h b/include/os/freebsd/spl/sys/simd_x86.h
index 7a0ca243f768..6512d4fcba4f 100644
--- a/include/os/freebsd/spl/sys/simd_x86.h
+++ b/include/os/freebsd/spl/sys/simd_x86.h
@@ -174,6 +174,19 @@ zfs_avx2_available(void)
 }
 
 /*
+ * Check if SHA_NI instruction set is available
+ */
+static inline boolean_t
+zfs_shani_available(void)
+{
+	boolean_t has_shani;
+
+	has_shani = (cpu_stdext_feature & CPUID_STDEXT_SHA) != 0;
+
+	return (has_shani && __ymm_enabled());
+}
+
+/*
  * AVX-512 family of instruction sets:
  *
  * AVX512F	Foundation