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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/powerpc/cache_shape
parentInitial commit. (diff)
downloadlinux-upstream/5.10.209.tar.xz
linux-upstream/5.10.209.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/powerpc/cache_shape')
-rw-r--r--tools/testing/selftests/powerpc/cache_shape/.gitignore2
-rw-r--r--tools/testing/selftests/powerpc/cache_shape/Makefile7
-rw-r--r--tools/testing/selftests/powerpc/cache_shape/cache_shape.c121
3 files changed, 130 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/cache_shape/.gitignore b/tools/testing/selftests/powerpc/cache_shape/.gitignore
new file mode 100644
index 000000000..b385eee30
--- /dev/null
+++ b/tools/testing/selftests/powerpc/cache_shape/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+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 000000000..689f6c8eb
--- /dev/null
+++ b/tools/testing/selftests/powerpc/cache_shape/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+TEST_GEN_PROGS := cache_shape
+
+top_srcdir = ../../../../..
+include ../../lib.mk
+
+$(TEST_GEN_PROGS): ../harness.c ../utils.c
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 000000000..171b6c948
--- /dev/null
+++ b/tools/testing/selftests/powerpc/cache_shape/cache_shape.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2017, Michael Ellerman, IBM Corp.
+ */
+
+#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");
+}