1 // SPDX-License-Identifier: GPL-2.0
41 	_1KB = 1ULL << 10,	/* 1KB -> not page aligned */
80 					 -1, 0);  in is_remap_region_valid()
122  * Using /proc/self/maps, assert that the specified address range is contained
133 	while (getline(&line, &len, maps_fp) != -1) {  in is_range_mapped()
134 		char *first = strtok(line, "- ");  in is_range_mapped()
136 		char *second = strtok(NULL, "- ");  in is_range_mapped()
162 		     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);  in mremap_expand_merge()
201 		     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);  in mremap_expand_merge_offset()
228  * Returns the start address of the mapping on success, else returns
246 					-1, 0);  in get_source_mapping()
253 	 * Check that the address is aligned to the specified alignment.  in get_source_mapping()
255 	 * specified are not considered valid. For instance, 1GB address is  in get_source_mapping()
256 	 * 2MB-aligned, however it will not be considered valid for a  in get_source_mapping()
260 	if (((unsigned long long) src_addr & (c.src_alignment - 1)) ||  in get_source_mapping()
276 /* Returns the time taken for the remap on success else returns -1. */
293 		ret = -1;  in remap_region()
302 	/* Mask to zero out lower bits of address for alignment */  in remap_region()
303 	align_mask = ~(c.dest_alignment - 1);  in remap_region()
304 	/* Offset of destination address from the end of the source region */  in remap_region()
305 	offset = (c.overlapping) ? -c.dest_alignment : c.dest_alignment;  in remap_region()
318 			ret = -1;  in remap_region()
331 		ret = -1;  in remap_region()
345 			ret = -1;  in remap_region()
352 	ret = end_ns - start_ns;  in remap_region()
355  * Since the destination address is specified using MREMAP_FIXED, subsequent  in remap_region()
356  * mremap will unmap any previous mapping at the address range specified by  in remap_region()
400 		"Usage: %s [[-t <threshold_mb>] [-p <pattern_seed>]]\n"  in usage()
401 		"-t\t only validate threshold_mb of the remapped region\n"  in usage()
405 		"-p\t provide a seed to generate the random pattern for\n"  in usage()
415 	while ((opt = getopt(argc, argv, optstr)) != -1) {  in parse_args()
425 			return -1;  in parse_args()
431 		return -1;  in parse_args()
465 				  "mremap - Source and Destination Regions Overlapping");  in main()
469 				  "mremap - Destination Address Misaligned (1KB-aligned)");  in main()
472 				  "mremap - Source Address Misaligned (1KB-aligned)");  in main()
474 	/* Src addr PTE aligned */  in main()
477 				  "8KB mremap - Source PTE-aligned, Destination PTE-aligned");  in main()
479 	/* Src addr 1MB aligned */  in main()
481 				  "2MB mremap - Source 1MB-aligned, Destination PTE-aligned");  in main()
483 				  "2MB mremap - Source 1MB-aligned, Destination 1MB-aligned");  in main()
485 	/* Src addr PMD aligned */  in main()
487 				  "4MB mremap - Source PMD-aligned, Destination PTE-aligned");  in main()
489 				  "4MB mremap - Source PMD-aligned, Destination 1MB-aligned");  in main()
491 				  "4MB mremap - Source PMD-aligned, Destination PMD-aligned");  in main()
493 	/* Src addr PUD aligned */  in main()
495 				  "2GB mremap - Source PUD-aligned, Destination PTE-aligned");  in main()
497 				   "2GB mremap - Source PUD-aligned, Destination 1MB-aligned");  in main()
499 				   "2GB mremap - Source PUD-aligned, Destination PMD-aligned");  in main()
501 				   "2GB mremap - Source PUD-aligned, Destination PUD-aligned");  in main()
504 					"1GB mremap - Source PTE-aligned, Destination PTE-aligned");  in main()
506 	 * mremap 1GB region - Page table level aligned time  in main()
510 				       "1GB mremap - Source PMD-aligned, Destination PMD-aligned");  in main()
512 				       "1GB mremap - Source PUD-aligned, Destination PUD-aligned");  in main()