144 static struct page *kimage_alloc_page(struct kimage *image,
148 int sanity_check_segment_list(struct kimage *image)  in sanity_check_segment_list()  argument
151 	unsigned long nr_segments = image->nr_segments;  in sanity_check_segment_list()
158 	 * the new image into invalid or reserved areas of RAM.  This  in sanity_check_segment_list()
171 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
172 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
190 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
191 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
195 			pstart = image->segment[j].mem;  in sanity_check_segment_list()
196 			pend   = pstart + image->segment[j].memsz;  in sanity_check_segment_list()
209 		if (image->segment[i].bufsz > image->segment[i].memsz)  in sanity_check_segment_list()
219 		if (PAGE_COUNT(image->segment[i].memsz) > nr_pages / 2)  in sanity_check_segment_list()
222 		total_pages += PAGE_COUNT(image->segment[i].memsz);  in sanity_check_segment_list()
231 	 * attempt to load the new image into invalid or reserved  in sanity_check_segment_list()
238 	if (image->type == KEXEC_TYPE_CRASH) {  in sanity_check_segment_list()
242 			mstart = image->segment[i].mem;  in sanity_check_segment_list()
243 			mend = mstart + image->segment[i].memsz - 1;  in sanity_check_segment_list()
256 	struct kimage *image;  in do_kimage_alloc_init()  local
259 	image = kzalloc(sizeof(*image), GFP_KERNEL);  in do_kimage_alloc_init()
260 	if (!image)  in do_kimage_alloc_init()
263 	image->head = 0;  in do_kimage_alloc_init()
264 	image->entry = &image->head;  in do_kimage_alloc_init()
265 	image->last_entry = &image->head;  in do_kimage_alloc_init()
266 	image->control_page = ~0; /* By default this does not apply */  in do_kimage_alloc_init()
267 	image->type = KEXEC_TYPE_DEFAULT;  in do_kimage_alloc_init()
270 	INIT_LIST_HEAD(&image->control_pages);  in do_kimage_alloc_init()
273 	INIT_LIST_HEAD(&image->dest_pages);  in do_kimage_alloc_init()
276 	INIT_LIST_HEAD(&image->unusable_pages);  in do_kimage_alloc_init()
278 	return image;  in do_kimage_alloc_init()
281 int kimage_is_destination_range(struct kimage *image,  in kimage_is_destination_range()  argument
287 	for (i = 0; i < image->nr_segments; i++) {  in kimage_is_destination_range()
290 		mstart = image->segment[i].mem;  in kimage_is_destination_range()
291 		mend = mstart + image->segment[i].memsz;  in kimage_is_destination_range()
350 static struct page *kimage_alloc_normal_control_pages(struct kimage *image,  in kimage_alloc_normal_control_pages()  argument
364 	 * At worst this runs in O(N) of the image size.  in kimage_alloc_normal_control_pages()
387 			      kimage_is_destination_range(image, addr, eaddr)) {  in kimage_alloc_normal_control_pages()
395 		list_add(&pages->lru, &image->control_pages);  in kimage_alloc_normal_control_pages()
401 		 * to give it an entry in image->segment[].  in kimage_alloc_normal_control_pages()
407 	 * page allocations, and add everything to image->dest_pages.  in kimage_alloc_normal_control_pages()
416 static struct page *kimage_alloc_crash_control_pages(struct kimage *image,  in kimage_alloc_crash_control_pages()  argument
445 	hole_start = (image->control_page + (size - 1)) & ~(size - 1);  in kimage_alloc_crash_control_pages()
455 		for (i = 0; i < image->nr_segments; i++) {  in kimage_alloc_crash_control_pages()
458 			mstart = image->segment[i].mem;  in kimage_alloc_crash_control_pages()
459 			mend   = mstart + image->segment[i].memsz - 1;  in kimage_alloc_crash_control_pages()
468 		if (i == image->nr_segments) {  in kimage_alloc_crash_control_pages()
470 			image->control_page = hole_end;  in kimage_alloc_crash_control_pages()
483 struct page *kimage_alloc_control_pages(struct kimage *image,  in kimage_alloc_control_pages()  argument
488 	switch (image->type) {  in kimage_alloc_control_pages()
490 		pages = kimage_alloc_normal_control_pages(image, order);  in kimage_alloc_control_pages()
493 		pages = kimage_alloc_crash_control_pages(image, order);  in kimage_alloc_control_pages()
500 int kimage_crash_copy_vmcoreinfo(struct kimage *image)  in kimage_crash_copy_vmcoreinfo()  argument
505 	if (image->type != KEXEC_TYPE_CRASH)  in kimage_crash_copy_vmcoreinfo()
517 	vmcoreinfo_page = kimage_alloc_control_pages(image, 0);  in kimage_crash_copy_vmcoreinfo()
528 	image->vmcoreinfo_data_copy = safecopy;  in kimage_crash_copy_vmcoreinfo()
534 static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)  in kimage_add_entry()  argument
536 	if (*image->entry != 0)  in kimage_add_entry()
537 		image->entry++;  in kimage_add_entry()
539 	if (image->entry == image->last_entry) {  in kimage_add_entry()
543 		page = kimage_alloc_page(image, GFP_KERNEL, KIMAGE_NO_DEST);  in kimage_add_entry()
548 		*image->entry = virt_to_boot_phys(ind_page) | IND_INDIRECTION;  in kimage_add_entry()
549 		image->entry = ind_page;  in kimage_add_entry()
550 		image->last_entry = ind_page +  in kimage_add_entry()
553 	*image->entry = entry;  in kimage_add_entry()
554 	image->entry++;  in kimage_add_entry()
555 	*image->entry = 0;  in kimage_add_entry()
560 static int kimage_set_destination(struct kimage *image,  in kimage_set_destination()  argument
566 	result = kimage_add_entry(image, destination | IND_DESTINATION);  in kimage_set_destination()
572 static int kimage_add_page(struct kimage *image, unsigned long page)  in kimage_add_page()  argument
577 	result = kimage_add_entry(image, page | IND_SOURCE);  in kimage_add_page()
583 static void kimage_free_extra_pages(struct kimage *image)  in kimage_free_extra_pages()  argument
586 	kimage_free_page_list(&image->dest_pages);  in kimage_free_extra_pages()
589 	kimage_free_page_list(&image->unusable_pages);  in kimage_free_extra_pages()
593 int __weak machine_kexec_post_load(struct kimage *image)  in machine_kexec_post_load()  argument
598 void kimage_terminate(struct kimage *image)  in kimage_terminate()  argument
600 	if (*image->entry != 0)  in kimage_terminate()
601 		image->entry++;  in kimage_terminate()
603 	*image->entry = IND_DONE;  in kimage_terminate()
606 #define for_each_kimage_entry(image, ptr, entry) \  argument
607 	for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); \
619 void kimage_free(struct kimage *image)  in kimage_free()  argument
624 	if (!image)  in kimage_free()
627 	if (image->vmcoreinfo_data_copy) {  in kimage_free()
629 		vunmap(image->vmcoreinfo_data_copy);  in kimage_free()
632 	kimage_free_extra_pages(image);  in kimage_free()
633 	for_each_kimage_entry(image, ptr, entry) {  in kimage_free()
650 	machine_kexec_cleanup(image);  in kimage_free()
653 	kimage_free_page_list(&image->control_pages);  in kimage_free()
659 	if (image->file_mode)  in kimage_free()
660 		kimage_file_post_load_cleanup(image);  in kimage_free()
662 	kfree(image);  in kimage_free()
665 static kimage_entry_t *kimage_dst_used(struct kimage *image,  in kimage_dst_used()  argument
671 	for_each_kimage_entry(image, ptr, entry) {  in kimage_dst_used()
684 static struct page *kimage_alloc_page(struct kimage *image,  in kimage_alloc_page()  argument
713 	list_for_each_entry(page, &image->dest_pages, lru) {  in kimage_alloc_page()
731 			list_add(&page->lru, &image->unusable_pages);  in kimage_alloc_page()
741 		if (!kimage_is_destination_range(image, addr,  in kimage_alloc_page()
750 		old = kimage_dst_used(image, addr);  in kimage_alloc_page()
775 		list_add(&page->lru, &image->dest_pages);  in kimage_alloc_page()
781 static int kimage_load_normal_segment(struct kimage *image,  in kimage_load_normal_segment()  argument
791 	if (image->file_mode)  in kimage_load_normal_segment()
799 	result = kimage_set_destination(image, maddr);  in kimage_load_normal_segment()
808 		page = kimage_alloc_page(image, GFP_HIGHUSER, maddr);  in kimage_load_normal_segment()
813 		result = kimage_add_page(image, page_to_boot_pfn(page)  in kimage_load_normal_segment()
827 		if (image->file_mode)  in kimage_load_normal_segment()
838 		if (image->file_mode)  in kimage_load_normal_segment()
850 static int kimage_load_crash_segment(struct kimage *image,  in kimage_load_crash_segment()  argument
864 	if (image->file_mode)  in kimage_load_crash_segment()
893 		if (image->file_mode)  in kimage_load_crash_segment()
906 		if (image->file_mode)  in kimage_load_crash_segment()
918 int kimage_load_segment(struct kimage *image,  in kimage_load_segment()  argument
923 	switch (image->type) {  in kimage_load_segment()
925 		result = kimage_load_normal_segment(image, segment);  in kimage_load_segment()
928 		result = kimage_load_crash_segment(image, segment);  in kimage_load_segment()