From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c | 42 ++++++++++++++++++++++++++----------------
1 files changed, 26 insertions(+), 16 deletions(-)
diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c
index b1fa754..cb2f188 100644
--- a/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c
+++ b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c
@@ -2,7 +2,9 @@
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/mman.h>
#include <time.h>
+
#include "utils.h"
#define SIZE 256
@@ -12,6 +14,9 @@
#define LARGE_ITERATIONS 1000
#define LARGE_MAX_OFFSET 32
#define LARGE_SIZE_START 4096
+
+/* This is big enough to fit LARGE_SIZE and works on 4K & 64K kernels */
+#define MAP_SIZE (64 * 1024)
#define MAX_OFFSET_DIFF_S1_S2 48
@@ -68,25 +73,25 @@
static int testcase(bool islarge)
{
- char *s1;
- char *s2;
- unsigned long i;
+ unsigned long i, comp_size, alloc_size;
+ char *p, *s1, *s2;
+ int iterations;
- unsigned long comp_size = (islarge ? LARGE_SIZE : SIZE);
- unsigned long alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2;
- int iterations = islarge ? LARGE_ITERATIONS : ITERATIONS;
+ comp_size = (islarge ? LARGE_SIZE : SIZE);
+ alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2;
+ iterations = islarge ? LARGE_ITERATIONS : ITERATIONS;
- s1 = memalign(128, alloc_size);
- if (!s1) {
- perror("memalign");
- exit(1);
- }
+ p = mmap(NULL, 4 * MAP_SIZE, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ FAIL_IF(p == MAP_FAILED);
- s2 = memalign(128, alloc_size);
- if (!s2) {
- perror("memalign");
- exit(1);
- }
+ /* Put s1/s2 at the end of a page */
+ s1 = p + MAP_SIZE - alloc_size;
+ s2 = p + 3 * MAP_SIZE - alloc_size;
+
+ /* And unmap the subsequent page to force a fault if we overread */
+ munmap(p + MAP_SIZE, MAP_SIZE);
+ munmap(p + 3 * MAP_SIZE, MAP_SIZE);
srandom(time(0));
@@ -147,6 +152,11 @@
static int testcases(void)
{
+#ifdef __powerpc64__
+ // vcmpequd used in memcmp_64.S is v2.07
+ SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
+#endif
+
testcase(0);
testcase(1);
return 0;
--
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