128 static struct page *kimage_alloc_page(struct kimage *image,
132 int sanity_check_segment_list(struct kimage *image)  in sanity_check_segment_list()  argument
135 	unsigned long nr_segments = image->nr_segments;  in sanity_check_segment_list()
142 	 * the new image into invalid or reserved areas of RAM.  This  in sanity_check_segment_list()
155 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
156 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
174 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
175 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
179 			pstart = image->segment[j].mem;  in sanity_check_segment_list()
180 			pend   = pstart + image->segment[j].memsz;  in sanity_check_segment_list()
193 		if (image->segment[i].bufsz > image->segment[i].memsz)  in sanity_check_segment_list()
203 		if (PAGE_COUNT(image->segment[i].memsz) > nr_pages / 2)  in sanity_check_segment_list()
206 		total_pages += PAGE_COUNT(image->segment[i].memsz);  in sanity_check_segment_list()
215 	 * attempt to load the new image into invalid or reserved  in sanity_check_segment_list()
222 	if (image->type == KEXEC_TYPE_CRASH) {  in sanity_check_segment_list()
226 			mstart = image->segment[i].mem;  in sanity_check_segment_list()
227 			mend = mstart + image->segment[i].memsz - 1;  in sanity_check_segment_list()
240 	struct kimage *image;  in do_kimage_alloc_init()  local
243 	image = kzalloc(sizeof(*image), GFP_KERNEL);  in do_kimage_alloc_init()
244 	if (!image)  in do_kimage_alloc_init()
247 	image->head = 0;  in do_kimage_alloc_init()
248 	image->entry = &image->head;  in do_kimage_alloc_init()
249 	image->last_entry = &image->head;  in do_kimage_alloc_init()
250 	image->control_page = ~0; /* By default this does not apply */  in do_kimage_alloc_init()
251 	image->type = KEXEC_TYPE_DEFAULT;  in do_kimage_alloc_init()
254 	INIT_LIST_HEAD(&image->control_pages);  in do_kimage_alloc_init()
257 	INIT_LIST_HEAD(&image->dest_pages);  in do_kimage_alloc_init()
260 	INIT_LIST_HEAD(&image->unusable_pages);  in do_kimage_alloc_init()
263 	image->hp_action = KEXEC_CRASH_HP_NONE;  in do_kimage_alloc_init()
264 	image->elfcorehdr_index = -1;  in do_kimage_alloc_init()
265 	image->elfcorehdr_updated = false;  in do_kimage_alloc_init()
268 	return image;  in do_kimage_alloc_init()
271 int kimage_is_destination_range(struct kimage *image,  in kimage_is_destination_range()  argument
277 	for (i = 0; i < image->nr_segments; i++) {  in kimage_is_destination_range()
280 		mstart = image->segment[i].mem;  in kimage_is_destination_range()
281 		mend = mstart + image->segment[i].memsz - 1;  in kimage_is_destination_range()
340 static struct page *kimage_alloc_normal_control_pages(struct kimage *image,  in kimage_alloc_normal_control_pages()  argument
354 	 * At worst this runs in O(N) of the image size.  in kimage_alloc_normal_control_pages()
377 			      kimage_is_destination_range(image, addr, eaddr)) {  in kimage_alloc_normal_control_pages()
385 		list_add(&pages->lru, &image->control_pages);  in kimage_alloc_normal_control_pages()
391 		 * to give it an entry in image->segment[].  in kimage_alloc_normal_control_pages()
397 	 * page allocations, and add everything to image->dest_pages.  in kimage_alloc_normal_control_pages()
406 static struct page *kimage_alloc_crash_control_pages(struct kimage *image,  in kimage_alloc_crash_control_pages()  argument
435 	hole_start = ALIGN(image->control_page, size);  in kimage_alloc_crash_control_pages()
445 		for (i = 0; i < image->nr_segments; i++) {  in kimage_alloc_crash_control_pages()
448 			mstart = image->segment[i].mem;  in kimage_alloc_crash_control_pages()
449 			mend   = mstart + image->segment[i].memsz - 1;  in kimage_alloc_crash_control_pages()
458 		if (i == image->nr_segments) {  in kimage_alloc_crash_control_pages()
460 			image->control_page = hole_end + 1;  in kimage_alloc_crash_control_pages()
473 struct page *kimage_alloc_control_pages(struct kimage *image,  in kimage_alloc_control_pages()  argument
478 	switch (image->type) {  in kimage_alloc_control_pages()
480 		pages = kimage_alloc_normal_control_pages(image, order);  in kimage_alloc_control_pages()
483 		pages = kimage_alloc_crash_control_pages(image, order);  in kimage_alloc_control_pages()
490 int kimage_crash_copy_vmcoreinfo(struct kimage *image)  in kimage_crash_copy_vmcoreinfo()  argument
495 	if (image->type != KEXEC_TYPE_CRASH)  in kimage_crash_copy_vmcoreinfo()
507 	vmcoreinfo_page = kimage_alloc_control_pages(image, 0);  in kimage_crash_copy_vmcoreinfo()
518 	image->vmcoreinfo_data_copy = safecopy;  in kimage_crash_copy_vmcoreinfo()
524 static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)  in kimage_add_entry()  argument
526 	if (*image->entry != 0)  in kimage_add_entry()
527 		image->entry++;  in kimage_add_entry()
529 	if (image->entry == image->last_entry) {  in kimage_add_entry()
533 		page = kimage_alloc_page(image, GFP_KERNEL, KIMAGE_NO_DEST);  in kimage_add_entry()
538 		*image->entry = virt_to_boot_phys(ind_page) | IND_INDIRECTION;  in kimage_add_entry()
539 		image->entry = ind_page;  in kimage_add_entry()
540 		image->last_entry = ind_page +  in kimage_add_entry()
543 	*image->entry = entry;  in kimage_add_entry()
544 	image->entry++;  in kimage_add_entry()
545 	*image->entry = 0;  in kimage_add_entry()
550 static int kimage_set_destination(struct kimage *image,  in kimage_set_destination()  argument
555 	return kimage_add_entry(image, destination | IND_DESTINATION);  in kimage_set_destination()
559 static int kimage_add_page(struct kimage *image, unsigned long page)  in kimage_add_page()  argument
563 	return kimage_add_entry(image, page | IND_SOURCE);  in kimage_add_page()
567 static void kimage_free_extra_pages(struct kimage *image)  in kimage_free_extra_pages()  argument
570 	kimage_free_page_list(&image->dest_pages);  in kimage_free_extra_pages()
573 	kimage_free_page_list(&image->unusable_pages);  in kimage_free_extra_pages()
577 void kimage_terminate(struct kimage *image)  in kimage_terminate()  argument
579 	if (*image->entry != 0)  in kimage_terminate()
580 		image->entry++;  in kimage_terminate()
582 	*image->entry = IND_DONE;  in kimage_terminate()
585 #define for_each_kimage_entry(image, ptr, entry) \  argument
586 	for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); \
598 void kimage_free(struct kimage *image)  in kimage_free()  argument
603 	if (!image)  in kimage_free()
606 	if (image->vmcoreinfo_data_copy) {  in kimage_free()
608 		vunmap(image->vmcoreinfo_data_copy);  in kimage_free()
611 	kimage_free_extra_pages(image);  in kimage_free()
612 	for_each_kimage_entry(image, ptr, entry) {  in kimage_free()
629 	machine_kexec_cleanup(image);  in kimage_free()
632 	kimage_free_page_list(&image->control_pages);  in kimage_free()
638 	if (image->file_mode)  in kimage_free()
639 		kimage_file_post_load_cleanup(image);  in kimage_free()
641 	kfree(image);  in kimage_free()
644 static kimage_entry_t *kimage_dst_used(struct kimage *image,  in kimage_dst_used()  argument
650 	for_each_kimage_entry(image, ptr, entry) {  in kimage_dst_used()
663 static struct page *kimage_alloc_page(struct kimage *image,  in kimage_alloc_page()  argument
692 	list_for_each_entry(page, &image->dest_pages, lru) {  in kimage_alloc_page()
710 			list_add(&page->lru, &image->unusable_pages);  in kimage_alloc_page()
720 		if (!kimage_is_destination_range(image, addr,  in kimage_alloc_page()
729 		old = kimage_dst_used(image, addr);  in kimage_alloc_page()
753 		list_add(&page->lru, &image->dest_pages);  in kimage_alloc_page()
759 static int kimage_load_normal_segment(struct kimage *image,  in kimage_load_normal_segment()  argument
768 	if (image->file_mode)  in kimage_load_normal_segment()
776 	result = kimage_set_destination(image, maddr);  in kimage_load_normal_segment()
785 		page = kimage_alloc_page(image, GFP_HIGHUSER, maddr);  in kimage_load_normal_segment()
790 		result = kimage_add_page(image, page_to_boot_pfn(page)  in kimage_load_normal_segment()
804 		if (image->file_mode)  in kimage_load_normal_segment()
815 		if (image->file_mode)  in kimage_load_normal_segment()
827 static int kimage_load_crash_segment(struct kimage *image,  in kimage_load_crash_segment()  argument
841 	if (image->file_mode)  in kimage_load_crash_segment()
870 		if (image->file_mode)  in kimage_load_crash_segment()
883 		if (image->file_mode)  in kimage_load_crash_segment()
895 int kimage_load_segment(struct kimage *image,  in kimage_load_segment()  argument
900 	switch (image->type) {  in kimage_load_segment()
902 		result = kimage_load_normal_segment(image, segment);  in kimage_load_segment()
905 		result = kimage_load_crash_segment(image, segment);  in kimage_load_segment()