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-rw-r--r--tools/testing/selftests/powerpc/Makefile1
-rw-r--r--tools/testing/selftests/powerpc/cache_shape/.gitignore1
-rw-r--r--tools/testing/selftests/powerpc/cache_shape/Makefile10
-rw-r--r--tools/testing/selftests/powerpc/cache_shape/cache_shape.c125
-rw-r--r--tools/testing/selftests/powerpc/include/utils.h6
-rw-r--r--tools/testing/selftests/powerpc/utils.c53
6 files changed, 178 insertions, 18 deletions
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index 2132ff8eb4e7..03e1617367d3 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -14,6 +14,7 @@ export CFLAGS
SUB_DIRS = alignment \
benchmarks \
+ cache_shape \
copyloops \
context_switch \
dscr \
diff --git a/tools/testing/selftests/powerpc/cache_shape/.gitignore b/tools/testing/selftests/powerpc/cache_shape/.gitignore
new file mode 100644
index 000000000000..ec1848434be5
--- /dev/null
+++ b/tools/testing/selftests/powerpc/cache_shape/.gitignore
@@ -0,0 +1 @@
+cache_shape
diff --git a/tools/testing/selftests/powerpc/cache_shape/Makefile b/tools/testing/selftests/powerpc/cache_shape/Makefile
new file mode 100644
index 000000000000..b24485ab30e2
--- /dev/null
+++ b/tools/testing/selftests/powerpc/cache_shape/Makefile
@@ -0,0 +1,10 @@
+TEST_PROGS := cache_shape
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c ../utils.c
+
+include ../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/tools/testing/selftests/powerpc/cache_shape/cache_shape.c b/tools/testing/selftests/powerpc/cache_shape/cache_shape.c
new file mode 100644
index 000000000000..29ec07eba7f9
--- /dev/null
+++ b/tools/testing/selftests/powerpc/cache_shape/cache_shape.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2017, Michael Ellerman, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <elf.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <link.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "utils.h"
+
+#ifndef AT_L1I_CACHESIZE
+#define AT_L1I_CACHESIZE 40
+#define AT_L1I_CACHEGEOMETRY 41
+#define AT_L1D_CACHESIZE 42
+#define AT_L1D_CACHEGEOMETRY 43
+#define AT_L2_CACHESIZE 44
+#define AT_L2_CACHEGEOMETRY 45
+#define AT_L3_CACHESIZE 46
+#define AT_L3_CACHEGEOMETRY 47
+#endif
+
+static void print_size(const char *label, uint32_t val)
+{
+ printf("%s cache size: %#10x %10dB %10dK\n", label, val, val, val / 1024);
+}
+
+static void print_geo(const char *label, uint32_t val)
+{
+ uint16_t assoc;
+
+ printf("%s line size: %#10x ", label, val & 0xFFFF);
+
+ assoc = val >> 16;
+ if (assoc)
+ printf("%u-way", assoc);
+ else
+ printf("fully");
+
+ printf(" associative\n");
+}
+
+static int test_cache_shape()
+{
+ static char buffer[4096];
+ ElfW(auxv_t) *p;
+ int found;
+
+ FAIL_IF(read_auxv(buffer, sizeof(buffer)));
+
+ found = 0;
+
+ p = find_auxv_entry(AT_L1I_CACHESIZE, buffer);
+ if (p) {
+ found++;
+ print_size("L1I ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L1I_CACHEGEOMETRY, buffer);
+ if (p) {
+ found++;
+ print_geo("L1I ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L1D_CACHESIZE, buffer);
+ if (p) {
+ found++;
+ print_size("L1D ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L1D_CACHEGEOMETRY, buffer);
+ if (p) {
+ found++;
+ print_geo("L1D ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L2_CACHESIZE, buffer);
+ if (p) {
+ found++;
+ print_size("L2 ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L2_CACHEGEOMETRY, buffer);
+ if (p) {
+ found++;
+ print_geo("L2 ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L3_CACHESIZE, buffer);
+ if (p) {
+ found++;
+ print_size("L3 ", (uint32_t)p->a_un.a_val);
+ }
+
+ p = find_auxv_entry(AT_L3_CACHEGEOMETRY, buffer);
+ if (p) {
+ found++;
+ print_geo("L3 ", (uint32_t)p->a_un.a_val);
+ }
+
+ /* If we found none we're probably on a system where they don't exist */
+ SKIP_IF(found == 0);
+
+ /* But if we found any, we expect to find them all */
+ FAIL_IF(found != 8);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_cache_shape, "cache_shape");
+}
diff --git a/tools/testing/selftests/powerpc/include/utils.h b/tools/testing/selftests/powerpc/include/utils.h
index 53405e8a52ab..735815b3ad7f 100644
--- a/tools/testing/selftests/powerpc/include/utils.h
+++ b/tools/testing/selftests/powerpc/include/utils.h
@@ -24,7 +24,11 @@ typedef uint8_t u8;
void test_harness_set_timeout(uint64_t time);
int test_harness(int (test_function)(void), char *name);
-extern void *get_auxv_entry(int type);
+
+int read_auxv(char *buf, ssize_t buf_size);
+void *find_auxv_entry(int type, char *auxv);
+void *get_auxv_entry(int type);
+
int pick_online_cpu(void);
static inline bool have_hwcap(unsigned long ftr)
diff --git a/tools/testing/selftests/powerpc/utils.c b/tools/testing/selftests/powerpc/utils.c
index dcf74184bfd0..d46916867a6f 100644
--- a/tools/testing/selftests/powerpc/utils.c
+++ b/tools/testing/selftests/powerpc/utils.c
@@ -19,45 +19,64 @@
static char auxv[4096];
-void *get_auxv_entry(int type)
+int read_auxv(char *buf, ssize_t buf_size)
{
- ElfW(auxv_t) *p;
- void *result;
ssize_t num;
- int fd;
+ int rc, fd;
fd = open("/proc/self/auxv", O_RDONLY);
if (fd == -1) {
perror("open");
- return NULL;
+ return -errno;
}
- result = NULL;
-
- num = read(fd, auxv, sizeof(auxv));
+ num = read(fd, buf, buf_size);
if (num < 0) {
perror("read");
+ rc = -EIO;
goto out;
}
- if (num > sizeof(auxv)) {
- printf("Overflowed auxv buffer\n");
+ 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) {
- result = (void *)p->a_un.a_val;
- break;
- }
+ if (p->a_type == type)
+ return p;
p++;
}
-out:
- close(fd);
- return result;
+
+ 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)
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-29 04:15:16 +0000