v4.19.13 snapshot.
diff --git a/tools/testing/selftests/powerpc/utils.c b/tools/testing/selftests/powerpc/utils.c
new file mode 100644
index 0000000..aa8fc1e
--- /dev/null
+++ b/tools/testing/selftests/powerpc/utils.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2013-2015, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#define _GNU_SOURCE /* For CPU_ZERO etc. */
+
+#include <elf.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <link.h>
+#include <sched.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+#include "utils.h"
+
+static char auxv[4096];
+
+int read_auxv(char *buf, ssize_t buf_size)
+{
+ ssize_t num;
+ int rc, fd;
+
+ fd = open("/proc/self/auxv", O_RDONLY);
+ if (fd == -1) {
+ perror("open");
+ return -errno;
+ }
+
+ num = read(fd, buf, buf_size);
+ if (num < 0) {
+ perror("read");
+ rc = -EIO;
+ goto out;
+ }
+
+ if (num > buf_size) {
+ printf("overflowed auxv buffer\n");
+ rc = -EOVERFLOW;
+ goto out;
+ }
+
+ rc = 0;
+out:
+ close(fd);
+ return rc;
+}
+
+void *find_auxv_entry(int type, char *auxv)
+{
+ ElfW(auxv_t) *p;
+
+ p = (ElfW(auxv_t) *)auxv;
+
+ while (p->a_type != AT_NULL) {
+ if (p->a_type == type)
+ return p;
+
+ p++;
+ }
+
+ return NULL;
+}
+
+void *get_auxv_entry(int type)
+{
+ ElfW(auxv_t) *p;
+
+ if (read_auxv(auxv, sizeof(auxv)))
+ return NULL;
+
+ p = find_auxv_entry(type, auxv);
+ if (p)
+ return (void *)p->a_un.a_val;
+
+ return NULL;
+}
+
+int pick_online_cpu(void)
+{
+ cpu_set_t mask;
+ int cpu;
+
+ CPU_ZERO(&mask);
+
+ if (sched_getaffinity(0, sizeof(mask), &mask)) {
+ perror("sched_getaffinity");
+ return -1;
+ }
+
+ /* We prefer a primary thread, but skip 0 */
+ for (cpu = 8; cpu < CPU_SETSIZE; cpu += 8)
+ if (CPU_ISSET(cpu, &mask))
+ return cpu;
+
+ /* Search for anything, but in reverse */
+ for (cpu = CPU_SETSIZE - 1; cpu >= 0; cpu--)
+ if (CPU_ISSET(cpu, &mask))
+ return cpu;
+
+ printf("No cpus in affinity mask?!\n");
+ return -1;
+}
+
+bool is_ppc64le(void)
+{
+ struct utsname uts;
+ int rc;
+
+ errno = 0;
+ rc = uname(&uts);
+ if (rc) {
+ perror("uname");
+ return false;
+ }
+
+ return strcmp(uts.machine, "ppc64le") == 0;
+}