diff options
Diffstat (limited to 'tools/testing/selftests/soft-dirty/soft-dirty.c')
| -rw-r--r-- | tools/testing/selftests/soft-dirty/soft-dirty.c | 114 | 
1 files changed, 0 insertions, 114 deletions
| diff --git a/tools/testing/selftests/soft-dirty/soft-dirty.c b/tools/testing/selftests/soft-dirty/soft-dirty.c deleted file mode 100644 index aba4f87f87f..00000000000 --- a/tools/testing/selftests/soft-dirty/soft-dirty.c +++ /dev/null @@ -1,114 +0,0 @@ -#include <stdlib.h> -#include <stdio.h> -#include <sys/mman.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/types.h> - -typedef unsigned long long u64; - -#define PME_PRESENT	(1ULL << 63) -#define PME_SOFT_DIRTY	(1Ull << 55) - -#define PAGES_TO_TEST	3 -#ifndef PAGE_SIZE -#define PAGE_SIZE	4096 -#endif - -static void get_pagemap2(char *mem, u64 *map) -{ -	int fd; - -	fd = open("/proc/self/pagemap2", O_RDONLY); -	if (fd < 0) { -		perror("Can't open pagemap2"); -		exit(1); -	} - -	lseek(fd, (unsigned long)mem / PAGE_SIZE * sizeof(u64), SEEK_SET); -	read(fd, map, sizeof(u64) * PAGES_TO_TEST); -	close(fd); -} - -static inline char map_p(u64 map) -{ -	return map & PME_PRESENT ? 'p' : '-'; -} - -static inline char map_sd(u64 map) -{ -	return map & PME_SOFT_DIRTY ? 'd' : '-'; -} - -static int check_pte(int step, int page, u64 *map, u64 want) -{ -	if ((map[page] & want) != want) { -		printf("Step %d Page %d has %c%c, want %c%c\n", -				step, page, -				map_p(map[page]), map_sd(map[page]), -				map_p(want), map_sd(want)); -		return 1; -	} - -	return 0; -} - -static void clear_refs(void) -{ -	int fd; -	char *v = "4"; - -	fd = open("/proc/self/clear_refs", O_WRONLY); -	if (write(fd, v, 3) < 3) { -		perror("Can't clear soft-dirty bit"); -		exit(1); -	} -	close(fd); -} - -int main(void) -{ -	char *mem, x; -	u64 map[PAGES_TO_TEST]; - -	mem = mmap(NULL, PAGES_TO_TEST * PAGE_SIZE, -			PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, 0, 0); - -	x = mem[0]; -	mem[2 * PAGE_SIZE] = 'c'; -	get_pagemap2(mem, map); - -	if (check_pte(1, 0, map, PME_PRESENT)) -		return 1; -	if (check_pte(1, 1, map, 0)) -		return 1; -	if (check_pte(1, 2, map, PME_PRESENT | PME_SOFT_DIRTY)) -		return 1; - -	clear_refs(); -	get_pagemap2(mem, map); - -	if (check_pte(2, 0, map, PME_PRESENT)) -		return 1; -	if (check_pte(2, 1, map, 0)) -		return 1; -	if (check_pte(2, 2, map, PME_PRESENT)) -		return 1; - -	mem[0] = 'a'; -	mem[PAGE_SIZE] = 'b'; -	x = mem[2 * PAGE_SIZE]; -	get_pagemap2(mem, map); - -	if (check_pte(3, 0, map, PME_PRESENT | PME_SOFT_DIRTY)) -		return 1; -	if (check_pte(3, 1, map, PME_PRESENT | PME_SOFT_DIRTY)) -		return 1; -	if (check_pte(3, 2, map, PME_PRESENT)) -		return 1; - -	(void)x; /* gcc warn */ - -	printf("PASS\n"); -	return 0; -} |