From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/tools/testing/selftests/vm/map_hugetlb.c | 43 ++++++++++++++++++++++++++++++++++---------
1 files changed, 34 insertions(+), 9 deletions(-)
diff --git a/kernel/tools/testing/selftests/vm/map_hugetlb.c b/kernel/tools/testing/selftests/vm/map_hugetlb.c
index 9b777fa..312889e 100644
--- a/kernel/tools/testing/selftests/vm/map_hugetlb.c
+++ b/kernel/tools/testing/selftests/vm/map_hugetlb.c
@@ -23,6 +23,14 @@
#define MAP_HUGETLB 0x40000 /* arch specific */
#endif
+#ifndef MAP_HUGE_SHIFT
+#define MAP_HUGE_SHIFT 26
+#endif
+
+#ifndef MAP_HUGE_MASK
+#define MAP_HUGE_MASK 0x3f
+#endif
+
/* Only ia64 requires this */
#ifdef __ia64__
#define ADDR (void *)(0x8000000000000000UL)
@@ -37,20 +45,20 @@
printf("First hex is %x\n", *((unsigned int *)addr));
}
-static void write_bytes(char *addr)
+static void write_bytes(char *addr, size_t length)
{
unsigned long i;
- for (i = 0; i < LENGTH; i++)
+ for (i = 0; i < length; i++)
*(addr + i) = (char)i;
}
-static int read_bytes(char *addr)
+static int read_bytes(char *addr, size_t length)
{
unsigned long i;
check_bytes(addr);
- for (i = 0; i < LENGTH; i++)
+ for (i = 0; i < length; i++)
if (*(addr + i) != (char)i) {
printf("Mismatch at %lu\n", i);
return 1;
@@ -58,12 +66,29 @@
return 0;
}
-int main(void)
+int main(int argc, char **argv)
{
void *addr;
int ret;
+ size_t length = LENGTH;
+ int flags = FLAGS;
+ int shift = 0;
- addr = mmap(ADDR, LENGTH, PROTECTION, FLAGS, -1, 0);
+ if (argc > 1)
+ length = atol(argv[1]) << 20;
+ if (argc > 2) {
+ shift = atoi(argv[2]);
+ if (shift)
+ flags |= (shift & MAP_HUGE_MASK) << MAP_HUGE_SHIFT;
+ }
+
+ if (shift)
+ printf("%u kB hugepages\n", 1 << (shift - 10));
+ else
+ printf("Default size hugepages\n");
+ printf("Mapping %lu Mbytes\n", (unsigned long)length >> 20);
+
+ addr = mmap(ADDR, length, PROTECTION, flags, -1, 0);
if (addr == MAP_FAILED) {
perror("mmap");
exit(1);
@@ -71,11 +96,11 @@
printf("Returned address is %p\n", addr);
check_bytes(addr);
- write_bytes(addr);
- ret = read_bytes(addr);
+ write_bytes(addr, length);
+ ret = read_bytes(addr, length);
/* munmap() length of MAP_HUGETLB memory must be hugepage aligned */
- if (munmap(addr, LENGTH)) {
+ if (munmap(addr, length)) {
perror("munmap");
exit(1);
}
--
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