105 static struct page *kimage_alloc_page(struct kimage *image,
109 int sanity_check_segment_list(struct kimage *image)  in sanity_check_segment_list()  argument
112 	unsigned long nr_segments = image->nr_segments;  in sanity_check_segment_list()
119 	 * the new image into invalid or reserved areas of RAM.  This  in sanity_check_segment_list()
132 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
133 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
151 		mstart = image->segment[i].mem;  in sanity_check_segment_list()
152 		mend   = mstart + image->segment[i].memsz;  in sanity_check_segment_list()
156 			pstart = image->segment[j].mem;  in sanity_check_segment_list()
157 			pend   = pstart + image->segment[j].memsz;  in sanity_check_segment_list()
170 		if (image->segment[i].bufsz > image->segment[i].memsz)  in sanity_check_segment_list()
180 		if (PAGE_COUNT(image->segment[i].memsz) > nr_pages / 2)  in sanity_check_segment_list()
183 		total_pages += PAGE_COUNT(image->segment[i].memsz);  in sanity_check_segment_list()
193 	 * attempt to load the new image into invalid or reserved  in sanity_check_segment_list()
200 	if (image->type == KEXEC_TYPE_CRASH) {  in sanity_check_segment_list()
204 			mstart = image->segment[i].mem;  in sanity_check_segment_list()
205 			mend = mstart + image->segment[i].memsz - 1;  in sanity_check_segment_list()
222 		accept_memory(image->segment[i].mem, image->segment[i].memsz);  in sanity_check_segment_list()
229 	struct kimage *image;  in do_kimage_alloc_init()  local
232 	image = kzalloc(sizeof(*image), GFP_KERNEL);  in do_kimage_alloc_init()
233 	if (!image)  in do_kimage_alloc_init()
236 	image->entry = &image->head;  in do_kimage_alloc_init()
237 	image->last_entry = &image->head;  in do_kimage_alloc_init()
238 	image->control_page = ~0; /* By default this does not apply */  in do_kimage_alloc_init()
239 	image->type = KEXEC_TYPE_DEFAULT;  in do_kimage_alloc_init()
242 	INIT_LIST_HEAD(&image->control_pages);  in do_kimage_alloc_init()
245 	INIT_LIST_HEAD(&image->dest_pages);  in do_kimage_alloc_init()
248 	INIT_LIST_HEAD(&image->unusable_pages);  in do_kimage_alloc_init()
251 	image->hp_action = KEXEC_CRASH_HP_NONE;  in do_kimage_alloc_init()
252 	image->elfcorehdr_index = -1;  in do_kimage_alloc_init()
253 	image->elfcorehdr_updated = false;  in do_kimage_alloc_init()
256 	return image;  in do_kimage_alloc_init()
259 int kimage_is_destination_range(struct kimage *image,  in kimage_is_destination_range()  argument
265 	for (i = 0; i < image->nr_segments; i++) {  in kimage_is_destination_range()
268 		mstart = image->segment[i].mem;  in kimage_is_destination_range()
269 		mend = mstart + image->segment[i].memsz - 1;  in kimage_is_destination_range()
328 static struct page *kimage_alloc_normal_control_pages(struct kimage *image,  in kimage_alloc_normal_control_pages()  argument
342 	 * At worst this runs in O(N) of the image size.  in kimage_alloc_normal_control_pages()
365 			      kimage_is_destination_range(image, addr, eaddr)) {  in kimage_alloc_normal_control_pages()
373 		list_add(&pages->lru, &image->control_pages);  in kimage_alloc_normal_control_pages()
379 		 * to give it an entry in image->segment[].  in kimage_alloc_normal_control_pages()
385 	 * page allocations, and add everything to image->dest_pages.  in kimage_alloc_normal_control_pages()
395 static struct page *kimage_alloc_crash_control_pages(struct kimage *image,  in kimage_alloc_crash_control_pages()  argument
424 	hole_start = ALIGN(image->control_page, size);  in kimage_alloc_crash_control_pages()
434 		for (i = 0; i < image->nr_segments; i++) {  in kimage_alloc_crash_control_pages()
437 			mstart = image->segment[i].mem;  in kimage_alloc_crash_control_pages()
438 			mend   = mstart + image->segment[i].memsz - 1;  in kimage_alloc_crash_control_pages()
447 		if (i == image->nr_segments) {  in kimage_alloc_crash_control_pages()
449 			image->control_page = hole_end + 1;  in kimage_alloc_crash_control_pages()
463 struct page *kimage_alloc_control_pages(struct kimage *image,  in kimage_alloc_control_pages()  argument
468 	switch (image->type) {  in kimage_alloc_control_pages()
470 		pages = kimage_alloc_normal_control_pages(image, order);  in kimage_alloc_control_pages()
474 		pages = kimage_alloc_crash_control_pages(image, order);  in kimage_alloc_control_pages()
482 static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)  in kimage_add_entry()  argument
484 	if (*image->entry != 0)  in kimage_add_entry()
485 		image->entry++;  in kimage_add_entry()
487 	if (image->entry == image->last_entry) {  in kimage_add_entry()
491 		page = kimage_alloc_page(image, GFP_KERNEL, KIMAGE_NO_DEST);  in kimage_add_entry()
496 		*image->entry = virt_to_boot_phys(ind_page) | IND_INDIRECTION;  in kimage_add_entry()
497 		image->entry = ind_page;  in kimage_add_entry()
498 		image->last_entry = ind_page +  in kimage_add_entry()
501 	*image->entry = entry;  in kimage_add_entry()
502 	image->entry++;  in kimage_add_entry()
503 	*image->entry = 0;  in kimage_add_entry()
508 static int kimage_set_destination(struct kimage *image,  in kimage_set_destination()  argument
513 	return kimage_add_entry(image, destination | IND_DESTINATION);  in kimage_set_destination()
517 static int kimage_add_page(struct kimage *image, unsigned long page)  in kimage_add_page()  argument
521 	return kimage_add_entry(image, page | IND_SOURCE);  in kimage_add_page()
525 static void kimage_free_extra_pages(struct kimage *image)  in kimage_free_extra_pages()  argument
528 	kimage_free_page_list(&image->dest_pages);  in kimage_free_extra_pages()
531 	kimage_free_page_list(&image->unusable_pages);  in kimage_free_extra_pages()
535 void kimage_terminate(struct kimage *image)  in kimage_terminate()  argument
537 	if (*image->entry != 0)  in kimage_terminate()
538 		image->entry++;  in kimage_terminate()
540 	*image->entry = IND_DONE;  in kimage_terminate()
543 #define for_each_kimage_entry(image, ptr, entry) \  argument
544 	for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); \
556 static void kimage_free_cma(struct kimage *image)  in kimage_free_cma()  argument
560 	for (i = 0; i < image->nr_segments; i++) {  in kimage_free_cma()
561 		struct page *cma = image->segment_cma[i];  in kimage_free_cma()
562 		u32 nr_pages = image->segment[i].memsz >> PAGE_SHIFT;  in kimage_free_cma()
569 		image->segment_cma[i] = NULL;  in kimage_free_cma()
574 void kimage_free(struct kimage *image)  in kimage_free()  argument
579 	if (!image)  in kimage_free()
583 	if (image->vmcoreinfo_data_copy) {  in kimage_free()
585 		vunmap(image->vmcoreinfo_data_copy);  in kimage_free()
589 	kimage_free_extra_pages(image);  in kimage_free()
590 	for_each_kimage_entry(image, ptr, entry) {  in kimage_free()
607 	machine_kexec_cleanup(image);  in kimage_free()
610 	kimage_free_page_list(&image->control_pages);  in kimage_free()
613 	kimage_free_cma(image);  in kimage_free()
619 	if (image->file_mode)  in kimage_free()
620 		kimage_file_post_load_cleanup(image);  in kimage_free()
622 	kfree(image);  in kimage_free()
625 static kimage_entry_t *kimage_dst_used(struct kimage *image,  in kimage_dst_used()  argument
631 	for_each_kimage_entry(image, ptr, entry) {  in kimage_dst_used()
644 static struct page *kimage_alloc_page(struct kimage *image,  in kimage_alloc_page()  argument
673 	list_for_each_entry(page, &image->dest_pages, lru) {  in kimage_alloc_page()
691 			list_add(&page->lru, &image->unusable_pages);  in kimage_alloc_page()
701 		if (!kimage_is_destination_range(image, addr,  in kimage_alloc_page()
710 		old = kimage_dst_used(image, addr);  in kimage_alloc_page()
734 		list_add(&page->lru, &image->dest_pages);  in kimage_alloc_page()
740 static int kimage_load_cma_segment(struct kimage *image, int idx)  in kimage_load_cma_segment()  argument
742 	struct kexec_segment *segment = &image->segment[idx];  in kimage_load_cma_segment()
743 	struct page *cma = image->segment_cma[idx];  in kimage_load_cma_segment()
751 	if (image->file_mode)  in kimage_load_cma_segment()
770 			if (image->file_mode)  in kimage_load_cma_segment()
775 			if (image->file_mode)  in kimage_load_cma_segment()
800 static int kimage_load_normal_segment(struct kimage *image, int idx)  in kimage_load_normal_segment()  argument
802 	struct kexec_segment *segment = &image->segment[idx];  in kimage_load_normal_segment()
809 	if (image->file_mode)  in kimage_load_normal_segment()
817 	if (image->segment_cma[idx])  in kimage_load_normal_segment()
818 		return kimage_load_cma_segment(image, idx);  in kimage_load_normal_segment()
820 	result = kimage_set_destination(image, maddr);  in kimage_load_normal_segment()
829 		page = kimage_alloc_page(image, GFP_HIGHUSER, maddr);  in kimage_load_normal_segment()
834 		result = kimage_add_page(image, page_to_boot_pfn(page)  in kimage_load_normal_segment()
849 			if (image->file_mode)  in kimage_load_normal_segment()
854 			if (image->file_mode)  in kimage_load_normal_segment()
874 static int kimage_load_crash_segment(struct kimage *image, int idx)  in kimage_load_crash_segment()  argument
880 	struct kexec_segment *segment = &image->segment[idx];  in kimage_load_crash_segment()
888 	if (image->file_mode)  in kimage_load_crash_segment()
918 			if (image->file_mode)  in kimage_load_crash_segment()
923 			if (image->file_mode)  in kimage_load_crash_segment()
945 int kimage_load_segment(struct kimage *image, int idx)  in kimage_load_segment()  argument
949 	switch (image->type) {  in kimage_load_segment()
951 		result = kimage_load_normal_segment(image, idx);  in kimage_load_segment()
955 		result = kimage_load_crash_segment(image, idx);  in kimage_load_segment()
963 void *kimage_map_segment(struct kimage *image,  in kimage_map_segment()  argument
985 	for_each_kimage_entry(image, ptr, entry) {  in kimage_map_segment()
1153 		 * before creating an image and before jumping from the  in kernel_kexec()
1154 		 * restore kernel to the image one, so it uses the same  in kernel_kexec()
1208 		 * creating an image and after the image kernel has got control  in kernel_kexec()