104 static struct page *kimage_alloc_page(struct kimage *image,
108 int sanity_check_segment_list(struct kimage *image)  in sanity_check_segment_list()  argument
111 	unsigned long nr_segments = image->nr_segments;  in sanity_check_segment_list()
131 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
132 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
150 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
151 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
155 			pstart = image->segment[j].mem;  in sanity_check_segment_list()
156 			pend   = pstart + image->segment[j].memsz;  in sanity_check_segment_list()
169 		if (image->segment[i].bufsz > image->segment[i].memsz)  in sanity_check_segment_list()
179 		if (PAGE_COUNT(image->segment[i].memsz) > nr_pages / 2)  in sanity_check_segment_list()
182 		total_pages += PAGE_COUNT(image->segment[i].memsz);  in sanity_check_segment_list()
199 	if (image->type == KEXEC_TYPE_CRASH) {  in sanity_check_segment_list()
203 			mstart = image->segment[i].mem;  in sanity_check_segment_list()
204 			mend = mstart + image->segment[i].memsz - 1;  in sanity_check_segment_list()
218 	struct kimage *image;  in do_kimage_alloc_init()  local
221 	image = kzalloc(sizeof(*image), GFP_KERNEL);  in do_kimage_alloc_init()
222 	if (!image)  in do_kimage_alloc_init()
225 	image->head = 0;  in do_kimage_alloc_init()
226 	image->entry = &image->head;  in do_kimage_alloc_init()
227 	image->last_entry = &image->head;  in do_kimage_alloc_init()
228 	image->control_page = ~0; /* By default this does not apply */  in do_kimage_alloc_init()
229 	image->type = KEXEC_TYPE_DEFAULT;  in do_kimage_alloc_init()
232 	INIT_LIST_HEAD(&image->control_pages);  in do_kimage_alloc_init()
235 	INIT_LIST_HEAD(&image->dest_pages);  in do_kimage_alloc_init()
238 	INIT_LIST_HEAD(&image->unusable_pages);  in do_kimage_alloc_init()
241 	image->hp_action = KEXEC_CRASH_HP_NONE;  in do_kimage_alloc_init()
242 	image->elfcorehdr_index = -1;  in do_kimage_alloc_init()
243 	image->elfcorehdr_updated = false;  in do_kimage_alloc_init()
246 	return image;  in do_kimage_alloc_init()
249 int kimage_is_destination_range(struct kimage *image,  in kimage_is_destination_range()  argument
255 	for (i = 0; i < image->nr_segments; i++) {  in kimage_is_destination_range()
258 		mstart = image->segment[i].mem;  in kimage_is_destination_range()
259 		mend = mstart + image->segment[i].memsz - 1;  in kimage_is_destination_range()
318 static struct page *kimage_alloc_normal_control_pages(struct kimage *image,  in kimage_alloc_normal_control_pages()  argument
355 			      kimage_is_destination_range(image, addr, eaddr)) {  in kimage_alloc_normal_control_pages()
363 		list_add(&pages->lru, &image->control_pages);  in kimage_alloc_normal_control_pages()
385 static struct page *kimage_alloc_crash_control_pages(struct kimage *image,  in kimage_alloc_crash_control_pages()  argument
414 	hole_start = ALIGN(image->control_page, size);  in kimage_alloc_crash_control_pages()
424 		for (i = 0; i < image->nr_segments; i++) {  in kimage_alloc_crash_control_pages()
427 			mstart = image->segment[i].mem;  in kimage_alloc_crash_control_pages()
428 			mend   = mstart + image->segment[i].memsz - 1;  in kimage_alloc_crash_control_pages()
437 		if (i == image->nr_segments) {  in kimage_alloc_crash_control_pages()
439 			image->control_page = hole_end + 1;  in kimage_alloc_crash_control_pages()
453 struct page *kimage_alloc_control_pages(struct kimage *image,  in kimage_alloc_control_pages()  argument
458 	switch (image->type) {  in kimage_alloc_control_pages()
460 		pages = kimage_alloc_normal_control_pages(image, order);  in kimage_alloc_control_pages()
464 		pages = kimage_alloc_crash_control_pages(image, order);  in kimage_alloc_control_pages()
472 static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)  in kimage_add_entry()  argument
474 	if (*image->entry != 0)  in kimage_add_entry()
475 		image->entry++;  in kimage_add_entry()
477 	if (image->entry == image->last_entry) {  in kimage_add_entry()
481 		page = kimage_alloc_page(image, GFP_KERNEL, KIMAGE_NO_DEST);  in kimage_add_entry()
486 		*image->entry = virt_to_boot_phys(ind_page) | IND_INDIRECTION;  in kimage_add_entry()
487 		image->entry = ind_page;  in kimage_add_entry()
488 		image->last_entry = ind_page +  in kimage_add_entry()
491 	*image->entry = entry;  in kimage_add_entry()
492 	image->entry++;  in kimage_add_entry()
493 	*image->entry = 0;  in kimage_add_entry()
498 static int kimage_set_destination(struct kimage *image,  in kimage_set_destination()  argument
503 	return kimage_add_entry(image, destination | IND_DESTINATION);  in kimage_set_destination()
507 static int kimage_add_page(struct kimage *image, unsigned long page)  in kimage_add_page()  argument
511 	return kimage_add_entry(image, page | IND_SOURCE);  in kimage_add_page()
515 static void kimage_free_extra_pages(struct kimage *image)  in kimage_free_extra_pages()  argument
518 	kimage_free_page_list(&image->dest_pages);  in kimage_free_extra_pages()
521 	kimage_free_page_list(&image->unusable_pages);  in kimage_free_extra_pages()
525 void kimage_terminate(struct kimage *image)  in kimage_terminate()  argument
527 	if (*image->entry != 0)  in kimage_terminate()
528 		image->entry++;  in kimage_terminate()
530 	*image->entry = IND_DONE;  in kimage_terminate()
533 #define for_each_kimage_entry(image, ptr, entry) \  argument
534 	for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); \
546 void kimage_free(struct kimage *image)  in kimage_free()  argument
551 	if (!image)  in kimage_free()
555 	if (image->vmcoreinfo_data_copy) {  in kimage_free()
557 		vunmap(image->vmcoreinfo_data_copy);  in kimage_free()
561 	kimage_free_extra_pages(image);  in kimage_free()
562 	for_each_kimage_entry(image, ptr, entry) {  in kimage_free()
579 	machine_kexec_cleanup(image);  in kimage_free()
582 	kimage_free_page_list(&image->control_pages);  in kimage_free()
588 	if (image->file_mode)  in kimage_free()
589 		kimage_file_post_load_cleanup(image);  in kimage_free()
591 	kfree(image);  in kimage_free()
594 static kimage_entry_t *kimage_dst_used(struct kimage *image,  in kimage_dst_used()  argument
600 	for_each_kimage_entry(image, ptr, entry) {  in kimage_dst_used()
613 static struct page *kimage_alloc_page(struct kimage *image,  in kimage_alloc_page()  argument
642 	list_for_each_entry(page, &image->dest_pages, lru) {  in kimage_alloc_page()
660 			list_add(&page->lru, &image->unusable_pages);  in kimage_alloc_page()
670 		if (!kimage_is_destination_range(image, addr,  in kimage_alloc_page()
679 		old = kimage_dst_used(image, addr);  in kimage_alloc_page()
703 		list_add(&page->lru, &image->dest_pages);  in kimage_alloc_page()
709 static int kimage_load_normal_segment(struct kimage *image,  in kimage_load_normal_segment()  argument
718 	if (image->file_mode)  in kimage_load_normal_segment()
726 	result = kimage_set_destination(image, maddr);  in kimage_load_normal_segment()
735 		page = kimage_alloc_page(image, GFP_HIGHUSER, maddr);  in kimage_load_normal_segment()
740 		result = kimage_add_page(image, page_to_boot_pfn(page)  in kimage_load_normal_segment()
755 			if (image->file_mode)  in kimage_load_normal_segment()
760 			if (image->file_mode)  in kimage_load_normal_segment()
780 static int kimage_load_crash_segment(struct kimage *image,  in kimage_load_crash_segment()  argument
794 	if (image->file_mode)  in kimage_load_crash_segment()
824 			if (image->file_mode)  in kimage_load_crash_segment()
829 			if (image->file_mode)  in kimage_load_crash_segment()
851 int kimage_load_segment(struct kimage *image,  in kimage_load_segment()  argument
856 	switch (image->type) {  in kimage_load_segment()
858 		result = kimage_load_normal_segment(image, segment);  in kimage_load_segment()
862 		result = kimage_load_crash_segment(image, segment);  in kimage_load_segment()