1 files changed, 56 insertions, 13 deletions

diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index 5d7f28b02d73..03eb99af9b8d 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -4,8 +4,6 @@
  *
  * Copyright (C) 2020, Google LLC.
  */
-
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdarg.h>
 #include <assert.h>
@@ -134,37 +132,57 @@ void print_skip(const char *fmt, ...)
 	puts(", skipping test");
 }
 
-bool thp_configured(void)
+static bool test_sysfs_path(const char *path)
 {
-	int ret;
 	struct stat statbuf;
+	int ret;
 
-	ret = stat("/sys/kernel/mm/transparent_hugepage", &statbuf);
+	ret = stat(path, &statbuf);
 	TEST_ASSERT(ret == 0 || (ret == -1 && errno == ENOENT),
-		    "Error in stating /sys/kernel/mm/transparent_hugepage");
+		    "Error in stat()ing '%s'", path);
 
 	return ret == 0;
 }
 
-size_t get_trans_hugepagesz(void)
+bool thp_configured(void)
+{
+	return test_sysfs_path("/sys/kernel/mm/transparent_hugepage");
+}
+
+static size_t get_sysfs_val(const char *path)
 {
 	size_t size;
 	FILE *f;
 	int ret;
 
-	TEST_ASSERT(thp_configured(), "THP is not configured in host kernel");
-
-	f = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r");
-	TEST_ASSERT(f != NULL, "Error in opening transparent_hugepage/hpage_pmd_size");
+	f = fopen(path, "r");
+	TEST_ASSERT(f, "Error opening '%s'", path);
 
 	ret = fscanf(f, "%ld", &size);
+	TEST_ASSERT(ret > 0, "Error reading '%s'", path);
+
+	/* Re-scan the input stream to verify the entire file was read. */
 	ret = fscanf(f, "%ld", &size);
-	TEST_ASSERT(ret < 1, "Error reading transparent_hugepage/hpage_pmd_size");
-	fclose(f);
+	TEST_ASSERT(ret < 1, "Error reading '%s'", path);
 
+	fclose(f);
 	return size;
 }
 
+size_t get_trans_hugepagesz(void)
+{
+	TEST_ASSERT(thp_configured(), "THP is not configured in host kernel");
+
+	return get_sysfs_val("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size");
+}
+
+bool is_numa_balancing_enabled(void)
+{
+	if (!test_sysfs_path("/proc/sys/kernel/numa_balancing"))
+		return false;
+	return get_sysfs_val("/proc/sys/kernel/numa_balancing") == 1;
+}
+
 size_t get_def_hugetlb_pagesz(void)
 {
 	char buf[64];
@@ -392,3 +410,28 @@ char *strdup_printf(const char *fmt, ...)
 
 	return str;
 }
+
+#define CLOCKSOURCE_PATH "/sys/devices/system/clocksource/clocksource0/current_clocksource"
+
+char *sys_get_cur_clocksource(void)
+{
+	char *clk_name;
+	struct stat st;
+	FILE *fp;
+
+	fp = fopen(CLOCKSOURCE_PATH, "r");
+	TEST_ASSERT(fp, "failed to open clocksource file, errno: %d", errno);
+
+	TEST_ASSERT(!fstat(fileno(fp), &st), "failed to stat clocksource file, errno: %d",
+		    errno);
+
+	clk_name = malloc(st.st_size);
+	TEST_ASSERT(clk_name, "failed to allocate buffer to read file");
+
+	TEST_ASSERT(fgets(clk_name, st.st_size, fp), "failed to read clocksource file: %d",
+		    ferror(fp));
+
+	fclose(fp);
+
+	return clk_name;
+}