44 static int sz2ord(size_t size)  in sz2ord()  argument
46 	return __builtin_ctzll(size / pagesize);  in sz2ord()
100 static bool range_is_swapped(void *addr, size_t size)  in range_is_swapped()  argument
102 	for (; size; addr += pagesize, size -= pagesize)  in range_is_swapped()
134 static int child_memcmp_fn(char *mem, size_t size,  in child_memcmp_fn()  argument
137 	char *old = malloc(size);  in child_memcmp_fn()
141 	memcpy(old, mem, size);  in child_memcmp_fn()
149 	return memcmp(old, mem, size);  in child_memcmp_fn()
152 static int child_vmsplice_memcmp_fn(char *mem, size_t size,  in child_vmsplice_memcmp_fn()  argument
157 		.iov_len = size,  in child_vmsplice_memcmp_fn()
164 	old = malloc(size);  in child_vmsplice_memcmp_fn()
165 	new = malloc(size);  in child_vmsplice_memcmp_fn()
168 	memcpy(old, mem, size);  in child_vmsplice_memcmp_fn()
181 	if (munmap(mem, size) < 0)  in child_vmsplice_memcmp_fn()
199 typedef int (*child_fn)(char *mem, size_t size, struct comm_pipes *comm_pipes);
201 static void do_test_cow_in_parent(char *mem, size_t size, bool do_mprotect,  in do_test_cow_in_parent()  argument
219 		exit(fn(mem, size, &comm_pipes));  in do_test_cow_in_parent()
230 		ret = mprotect(mem, size, PROT_READ);  in do_test_cow_in_parent()
231 		ret |= mprotect(mem, size, PROT_READ|PROT_WRITE);  in do_test_cow_in_parent()
241 	memset(mem, 0xff, size);  in do_test_cow_in_parent()
266 static void test_cow_in_parent(char *mem, size_t size, bool is_hugetlb)  in test_cow_in_parent()  argument
268 	do_test_cow_in_parent(mem, size, false, child_memcmp_fn, false);  in test_cow_in_parent()
271 static void test_cow_in_parent_mprotect(char *mem, size_t size, bool is_hugetlb)  in test_cow_in_parent_mprotect()  argument
273 	do_test_cow_in_parent(mem, size, true, child_memcmp_fn, false);  in test_cow_in_parent_mprotect()
276 static void test_vmsplice_in_child(char *mem, size_t size, bool is_hugetlb)  in test_vmsplice_in_child()  argument
278 	do_test_cow_in_parent(mem, size, false, child_vmsplice_memcmp_fn,  in test_vmsplice_in_child()
282 static void test_vmsplice_in_child_mprotect(char *mem, size_t size,  in test_vmsplice_in_child_mprotect()  argument
285 	do_test_cow_in_parent(mem, size, true, child_vmsplice_memcmp_fn,  in test_vmsplice_in_child_mprotect()
289 static void do_test_vmsplice_in_parent(char *mem, size_t size,  in do_test_vmsplice_in_parent()  argument
294 		.iov_len = size,  in do_test_vmsplice_in_parent()
302 	old = malloc(size);  in do_test_vmsplice_in_parent()
303 	new = malloc(size);  in do_test_vmsplice_in_parent()
305 	memcpy(old, mem, size);  in do_test_vmsplice_in_parent()
335 		memset(mem, 0xff, size);  in do_test_vmsplice_in_parent()
350 	if (munmap(mem, size) < 0) {  in do_test_vmsplice_in_parent()
394 static void test_vmsplice_before_fork(char *mem, size_t size, bool is_hugetlb)  in test_vmsplice_before_fork()  argument
396 	do_test_vmsplice_in_parent(mem, size, true, is_hugetlb);  in test_vmsplice_before_fork()
399 static void test_vmsplice_after_fork(char *mem, size_t size, bool is_hugetlb)  in test_vmsplice_after_fork()  argument
401 	do_test_vmsplice_in_parent(mem, size, false, is_hugetlb);  in test_vmsplice_after_fork()
405 static void do_test_iouring(char *mem, size_t size, bool use_fork)  in do_test_iouring()  argument
431 	tmp = malloc(size);  in do_test_iouring()
452 	iov.iov_len = size;  in do_test_iouring()
485 		ret = mprotect(mem, size, PROT_READ);  in do_test_iouring()
487 		ret |= mprotect(mem, size, PROT_READ | PROT_WRITE);  in do_test_iouring()
498 	memset(mem, 0xff, size);  in do_test_iouring()
504 	io_uring_prep_write_fixed(sqe, fd, mem, size, 0, 0);  in do_test_iouring()
518 	if (cqe->res != size) {  in do_test_iouring()
526 	while (total < size) {  in do_test_iouring()
527 		cur = pread(fd, tmp + total, size - total, total);  in do_test_iouring()
536 	ksft_test_result(!memcmp(mem, tmp, size),  in do_test_iouring()
556 static void test_iouring_ro(char *mem, size_t size, bool is_hugetlb)  in test_iouring_ro()  argument
558 	do_test_iouring(mem, size, false);  in test_iouring_ro()
561 static void test_iouring_fork(char *mem, size_t size, bool is_hugetlb)  in test_iouring_fork()  argument
563 	do_test_iouring(mem, size, true);  in test_iouring_fork()
575 static void do_test_ro_pin(char *mem, size_t size, enum ro_pin_test test,  in do_test_ro_pin()  argument
589 	tmp = malloc(size);  in do_test_ro_pin()
645 		ret = mprotect(mem, size, PROT_READ);  in do_test_ro_pin()
647 		ret |= mprotect(mem, size, PROT_READ | PROT_WRITE);  in do_test_ro_pin()
659 	args.size = size;  in do_test_ro_pin()
671 	memset(mem, 0xff, size);  in do_test_ro_pin()
682 		ksft_test_result(!memcmp(mem, tmp, size),  in do_test_ro_pin()
705 static void test_ro_pin_on_shared(char *mem, size_t size, bool is_hugetlb)  in test_ro_pin_on_shared()  argument
707 	do_test_ro_pin(mem, size, RO_PIN_TEST_SHARED, false);  in test_ro_pin_on_shared()
710 static void test_ro_fast_pin_on_shared(char *mem, size_t size, bool is_hugetlb)  in test_ro_fast_pin_on_shared()  argument
712 	do_test_ro_pin(mem, size, RO_PIN_TEST_SHARED, true);  in test_ro_fast_pin_on_shared()
715 static void test_ro_pin_on_ro_previously_shared(char *mem, size_t size,  in test_ro_pin_on_ro_previously_shared()  argument
718 	do_test_ro_pin(mem, size, RO_PIN_TEST_PREVIOUSLY_SHARED, false);  in test_ro_pin_on_ro_previously_shared()
721 static void test_ro_fast_pin_on_ro_previously_shared(char *mem, size_t size,  in test_ro_fast_pin_on_ro_previously_shared()  argument
724 	do_test_ro_pin(mem, size, RO_PIN_TEST_PREVIOUSLY_SHARED, true);  in test_ro_fast_pin_on_ro_previously_shared()
727 static void test_ro_pin_on_ro_exclusive(char *mem, size_t size,  in test_ro_pin_on_ro_exclusive()  argument
730 	do_test_ro_pin(mem, size, RO_PIN_TEST_RO_EXCLUSIVE, false);  in test_ro_pin_on_ro_exclusive()
733 static void test_ro_fast_pin_on_ro_exclusive(char *mem, size_t size,  in test_ro_fast_pin_on_ro_exclusive()  argument
736 	do_test_ro_pin(mem, size, RO_PIN_TEST_RO_EXCLUSIVE, true);  in test_ro_fast_pin_on_ro_exclusive()
739 typedef void (*test_fn)(char *mem, size_t size, bool hugetlb);
802 	size_t size, mmap_size, mremap_size;  in do_run_with_thp()  local
834 	size = thpsize;  in do_run_with_thp()
869 		size = pagesize;  in do_run_with_thp()
889 		size = mremap_size;  in do_run_with_thp()
925 		madvise(mem, size, MADV_PAGEOUT);  in do_run_with_thp()
926 		if (!range_is_swapped(mem, size)) {  in do_run_with_thp()
935 	fn(mem, size, false);  in do_run_with_thp()
942 static void run_with_thp(test_fn fn, const char *desc, size_t size)  in run_with_thp()  argument
945 		desc, size / 1024);  in run_with_thp()
946 	do_run_with_thp(fn, THP_RUN_PMD, size);  in run_with_thp()
949 static void run_with_thp_swap(test_fn fn, const char *desc, size_t size)  in run_with_thp_swap()  argument
952 		desc, size / 1024);  in run_with_thp_swap()
953 	do_run_with_thp(fn, THP_RUN_PMD_SWAPOUT, size);  in run_with_thp_swap()
956 static void run_with_pte_mapped_thp(test_fn fn, const char *desc, size_t size)  in run_with_pte_mapped_thp()  argument
959 		desc, size / 1024);  in run_with_pte_mapped_thp()
960 	do_run_with_thp(fn, THP_RUN_PTE, size);  in run_with_pte_mapped_thp()
963 static void run_with_pte_mapped_thp_swap(test_fn fn, const char *desc, size_t size)  in run_with_pte_mapped_thp_swap()  argument
966 		desc, size / 1024);  in run_with_pte_mapped_thp_swap()
967 	do_run_with_thp(fn, THP_RUN_PTE_SWAPOUT, size);  in run_with_pte_mapped_thp_swap()
970 static void run_with_single_pte_of_thp(test_fn fn, const char *desc, size_t size)  in run_with_single_pte_of_thp()  argument
973 		desc, size / 1024);  in run_with_single_pte_of_thp()
974 	do_run_with_thp(fn, THP_RUN_SINGLE_PTE, size);  in run_with_single_pte_of_thp()
977 static void run_with_single_pte_of_thp_swap(test_fn fn, const char *desc, size_t size)  in run_with_single_pte_of_thp_swap()  argument
980 		desc, size / 1024);  in run_with_single_pte_of_thp_swap()
981 	do_run_with_thp(fn, THP_RUN_SINGLE_PTE_SWAPOUT, size);  in run_with_single_pte_of_thp_swap()
984 static void run_with_partial_mremap_thp(test_fn fn, const char *desc, size_t size)  in run_with_partial_mremap_thp()  argument
987 		desc, size / 1024);  in run_with_partial_mremap_thp()
988 	do_run_with_thp(fn, THP_RUN_PARTIAL_MREMAP, size);  in run_with_partial_mremap_thp()
991 static void run_with_partial_shared_thp(test_fn fn, const char *desc, size_t size)  in run_with_partial_shared_thp()  argument
994 		desc, size / 1024);  in run_with_partial_shared_thp()
995 	do_run_with_thp(fn, THP_RUN_PARTIAL_SHARED, size);  in run_with_partial_shared_thp()
1167 		size_t size = thpsizes[i];  in run_anon_test_case()  local
1171 		settings.hugepages[sz2ord(size)].enabled = THP_ALWAYS;  in run_anon_test_case()
1174 		if (size == pmdsize) {  in run_anon_test_case()
1175 			run_with_thp(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1176 			run_with_thp_swap(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1179 		run_with_pte_mapped_thp(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1180 		run_with_pte_mapped_thp_swap(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1181 		run_with_single_pte_of_thp(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1182 		run_with_single_pte_of_thp_swap(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1183 		run_with_partial_mremap_thp(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1184 		run_with_partial_shared_thp(test_case->fn, test_case->desc, size);  in run_anon_test_case()
1220 static void do_test_anon_thp_collapse(char *mem, size_t size,  in do_test_anon_thp_collapse()  argument
1251 		ret = madvise(mem, size, MADV_COLLAPSE);  in do_test_anon_thp_collapse()
1263 		ret = madvise(mem + size / 2, size / 2, MADV_DONTFORK);  in do_test_anon_thp_collapse()
1271 		ret = madvise(mem, size / 2, MADV_DONTFORK);  in do_test_anon_thp_collapse()
1289 			exit(child_memcmp_fn(mem, size, &comm_pipes));  in do_test_anon_thp_collapse()
1292 			exit(child_memcmp_fn(mem, size / 2, &comm_pipes));  in do_test_anon_thp_collapse()
1295 			exit(child_memcmp_fn(mem + size / 2, size / 2,  in do_test_anon_thp_collapse()
1315 		ret = madvise(mem, size, MADV_DOFORK);  in do_test_anon_thp_collapse()
1325 		ret = madvise(mem, size, MADV_COLLAPSE);  in do_test_anon_thp_collapse()
1339 	memset(mem, 0xff, size);  in do_test_anon_thp_collapse()
1353 static void test_anon_thp_collapse_unshared(char *mem, size_t size,  in test_anon_thp_collapse_unshared()  argument
1357 	do_test_anon_thp_collapse(mem, size, ANON_THP_COLLAPSE_UNSHARED);  in test_anon_thp_collapse_unshared()
1360 static void test_anon_thp_collapse_fully_shared(char *mem, size_t size,  in test_anon_thp_collapse_fully_shared()  argument
1364 	do_test_anon_thp_collapse(mem, size, ANON_THP_COLLAPSE_FULLY_SHARED);  in test_anon_thp_collapse_fully_shared()
1367 static void test_anon_thp_collapse_lower_shared(char *mem, size_t size,  in test_anon_thp_collapse_lower_shared()  argument
1371 	do_test_anon_thp_collapse(mem, size, ANON_THP_COLLAPSE_LOWER_SHARED);  in test_anon_thp_collapse_lower_shared()
1374 static void test_anon_thp_collapse_upper_shared(char *mem, size_t size,  in test_anon_thp_collapse_upper_shared()  argument
1378 	do_test_anon_thp_collapse(mem, size, ANON_THP_COLLAPSE_UPPER_SHARED);  in test_anon_thp_collapse_upper_shared()
1443 typedef void (*non_anon_test_fn)(char *mem, const char *smem, size_t size);
1445 static void test_cow(char *mem, const char *smem, size_t size)  in test_cow()  argument
1447 	char *old = malloc(size);  in test_cow()
1450 	memcpy(old, smem, size);  in test_cow()
1453 	memset(mem, 0xff, size);  in test_cow()
1456 	ksft_test_result(!memcmp(smem, old, size),  in test_cow()
1461 static void test_ro_pin(char *mem, const char *smem, size_t size)  in test_ro_pin()  argument
1463 	do_test_ro_pin(mem, size, RO_PIN_TEST, false);  in test_ro_pin()
1466 static void test_ro_fast_pin(char *mem, const char *smem, size_t size)  in test_ro_fast_pin()  argument
1468 	do_test_ro_pin(mem, size, RO_PIN_TEST, true);  in test_ro_fast_pin()