summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/vm/hmm-tests.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/vm/hmm-tests.c')
-rw-r--r--tools/testing/selftests/vm/hmm-tests.c108
1 files changed, 73 insertions, 35 deletions
diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c
index 529f53b40296..f2c2c970eeb2 100644
--- a/tools/testing/selftests/vm/hmm-tests.c
+++ b/tools/testing/selftests/vm/hmm-tests.c
@@ -26,10 +26,6 @@
#include <sys/mman.h>
#include <sys/ioctl.h>
-#include "./local_config.h"
-#ifdef LOCAL_CONFIG_HAVE_LIBHUGETLBFS
-#include <hugetlbfs.h>
-#endif
/*
* This is a private UAPI to the kernel test module so it isn't exported
@@ -733,7 +729,54 @@ TEST_F(hmm, anon_write_huge)
hmm_buffer_free(buffer);
}
-#ifdef LOCAL_CONFIG_HAVE_LIBHUGETLBFS
+/*
+ * Read numeric data from raw and tagged kernel status files. Used to read
+ * /proc and /sys data (without a tag) and from /proc/meminfo (with a tag).
+ */
+static long file_read_ulong(char *file, const char *tag)
+{
+ int fd;
+ char buf[2048];
+ int len;
+ char *p, *q;
+ long val;
+
+ fd = open(file, O_RDONLY);
+ if (fd < 0) {
+ /* Error opening the file */
+ return -1;
+ }
+
+ len = read(fd, buf, sizeof(buf));
+ close(fd);
+ if (len < 0) {
+ /* Error in reading the file */
+ return -1;
+ }
+ if (len == sizeof(buf)) {
+ /* Error file is too large */
+ return -1;
+ }
+ buf[len] = '\0';
+
+ /* Search for a tag if provided */
+ if (tag) {
+ p = strstr(buf, tag);
+ if (!p)
+ return -1; /* looks like the line we want isn't there */
+ p += strlen(tag);
+ } else
+ p = buf;
+
+ val = strtol(p, &q, 0);
+ if (*q != ' ') {
+ /* Error parsing the file */
+ return -1;
+ }
+
+ return val;
+}
+
/*
* Write huge TLBFS page.
*/
@@ -742,29 +785,27 @@ TEST_F(hmm, anon_write_hugetlbfs)
struct hmm_buffer *buffer;
unsigned long npages;
unsigned long size;
+ unsigned long default_hsize;
unsigned long i;
int *ptr;
int ret;
- long pagesizes[4];
- int n, idx;
-
- /* Skip test if we can't allocate a hugetlbfs page. */
- n = gethugepagesizes(pagesizes, 4);
- if (n <= 0)
+ default_hsize = file_read_ulong("/proc/meminfo", "Hugepagesize:");
+ if (default_hsize < 0 || default_hsize*1024 < default_hsize)
SKIP(return, "Huge page size could not be determined");
- for (idx = 0; --n > 0; ) {
- if (pagesizes[n] < pagesizes[idx])
- idx = n;
- }
- size = ALIGN(TWOMEG, pagesizes[idx]);
+ default_hsize = default_hsize*1024; /* KB to B */
+
+ size = ALIGN(TWOMEG, default_hsize);
npages = size >> self->page_shift;
buffer = malloc(sizeof(*buffer));
ASSERT_NE(buffer, NULL);
- buffer->ptr = get_hugepage_region(size, GHR_STRICT);
- if (buffer->ptr == NULL) {
+ buffer->ptr = mmap(NULL, size,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB,
+ -1, 0);
+ if (buffer->ptr == MAP_FAILED) {
free(buffer);
SKIP(return, "Huge page could not be allocated");
}
@@ -788,11 +829,10 @@ TEST_F(hmm, anon_write_hugetlbfs)
for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
ASSERT_EQ(ptr[i], i);
- free_hugepage_region(buffer->ptr);
+ munmap(buffer->ptr, buffer->size);
buffer->ptr = NULL;
hmm_buffer_free(buffer);
}
-#endif /* LOCAL_CONFIG_HAVE_LIBHUGETLBFS */
/*
* Read mmap'ed file memory.
@@ -1467,7 +1507,6 @@ TEST_F(hmm2, snapshot)
hmm_buffer_free(buffer);
}
-#ifdef LOCAL_CONFIG_HAVE_LIBHUGETLBFS
/*
* Test the hmm_range_fault() HMM_PFN_PMD flag for large pages that
* should be mapped by a large page table entry.
@@ -1477,30 +1516,30 @@ TEST_F(hmm, compound)
struct hmm_buffer *buffer;
unsigned long npages;
unsigned long size;
+ unsigned long default_hsize;
int *ptr;
unsigned char *m;
int ret;
- long pagesizes[4];
- int n, idx;
unsigned long i;
/* Skip test if we can't allocate a hugetlbfs page. */
- n = gethugepagesizes(pagesizes, 4);
- if (n <= 0)
- return;
- for (idx = 0; --n > 0; ) {
- if (pagesizes[n] < pagesizes[idx])
- idx = n;
- }
- size = ALIGN(TWOMEG, pagesizes[idx]);
+ default_hsize = file_read_ulong("/proc/meminfo", "Hugepagesize:");
+ if (default_hsize < 0 || default_hsize*1024 < default_hsize)
+ SKIP(return, "Huge page size could not be determined");
+ default_hsize = default_hsize*1024; /* KB to B */
+
+ size = ALIGN(TWOMEG, default_hsize);
npages = size >> self->page_shift;
buffer = malloc(sizeof(*buffer));
ASSERT_NE(buffer, NULL);
- buffer->ptr = get_hugepage_region(size, GHR_STRICT);
- if (buffer->ptr == NULL) {
+ buffer->ptr = mmap(NULL, size,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB,
+ -1, 0);
+ if (buffer->ptr == MAP_FAILED) {
free(buffer);
return;
}
@@ -1539,11 +1578,10 @@ TEST_F(hmm, compound)
ASSERT_EQ(m[i], HMM_DMIRROR_PROT_READ |
HMM_DMIRROR_PROT_PMD);
- free_hugepage_region(buffer->ptr);
+ munmap(buffer->ptr, buffer->size);
buffer->ptr = NULL;
hmm_buffer_free(buffer);
}
-#endif /* LOCAL_CONFIG_HAVE_LIBHUGETLBFS */
/*
* Test two devices reading the same memory (double mapped).