FreeBSD: Fixes required to build ZFS on PowerPC

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10622

include/os/freebsd/spl/sys/isa_defs.h

@@ -542,6 +542,21 @@ extern "C" {
 #define	_BIT_FIELDS_LTOH
 #endif
 
+#if !defined(__powerpc)
+#define	__powerpc
+#endif
+
+#if defined(__powerpc64__)
+#define	_LONG_LONG_ALIGNMENT		8
+#define	_MULTI_DATAMODEL
+#else
+#define	_LONG_LONG_ALIGNMENT		4
+#endif
+#define	_LONG_LONG_ALIGNMENT_32		4
+#define	_ALIGNMENT_REQUIRED		1
+
+#define	_SUNOS_VTOC_16	1
+
 /*
  * The following set of definitions characterize the Solaris on SPARC systems.
  *

lib/libspl/include/sys/simd.h

@@ -464,7 +464,7 @@ zfs_avx512vbmi_available(void)
 #include <signal.h>
 #include <setjmp.h>
 
-#ifdef __ALTIVEC__
+#if defined(__ALTIVEC__) && !defined(__FreeBSD__)
 static jmp_buf env;
 static void sigillhandler(int x)
 {
@@ -476,7 +476,7 @@ static inline boolean_t
 zfs_altivec_available(void)
 {
 	boolean_t has_altivec = B_FALSE;
-#ifdef __ALTIVEC__
+#if defined(__ALTIVEC__) && !defined(__FreeBSD__)
 	sighandler_t savesig;
 	savesig = signal(SIGILL, sigillhandler);
 	if (setjmp(env)) {

module/zfs/vdev_raidz_math.c

@@ -65,7 +65,7 @@ const raidz_impl_ops_t *raidz_all_maths[] = {
 	&vdev_raidz_aarch64_neon_impl,
 	&vdev_raidz_aarch64_neonx2_impl,
 #endif
-#if defined(__powerpc__)
+#if defined(__powerpc__) && defined(__altivec__)
 	&vdev_raidz_powerpc_altivec_impl,
 #endif
 };