26  * Additional space needed for the FDT buffer so that we can add initrd,
34  * @fdt:	Flattened device tree for the current kernel.
40 static int fdt_find_and_del_mem_rsv(void *fdt, unsigned long start, unsigned long size)  in fdt_find_and_del_mem_rsv()  argument
42 	int i, ret, num_rsvs = fdt_num_mem_rsv(fdt);  in fdt_find_and_del_mem_rsv()
47 		ret = fdt_get_mem_rsv(fdt, i, &rsv_start, &rsv_size);  in fdt_find_and_del_mem_rsv()
54 			ret = fdt_del_mem_rsv(fdt, i);  in fdt_find_and_del_mem_rsv()
193  * remove_ima_buffer - remove the IMA buffer property and reservation from @fdt
195  * @fdt: Flattened Device Tree to update
201 static void remove_ima_buffer(void *fdt, int chosen_node)  in remove_ima_buffer()  argument
211 	prop = fdt_getprop(fdt, chosen_node, "linux,ima-kexec-buffer", &len);  in remove_ima_buffer()
216 	fdt_delprop(fdt, chosen_node, "linux,ima-kexec-buffer");  in remove_ima_buffer()
220 	ret = fdt_find_and_del_mem_rsv(fdt, addr, size);  in remove_ima_buffer()
227  * setup_ima_buffer - add IMA buffer information to the fdt
229  * @fdt:		Flattened device tree for the next kernel.
234 static int setup_ima_buffer(const struct kimage *image, void *fdt,  in setup_ima_buffer()  argument
242 	ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,  in setup_ima_buffer()
249 	ret = fdt_add_mem_rsv(fdt, image->ima_buffer_addr,  in setup_ima_buffer()
260 static inline int setup_ima_buffer(const struct kimage *image, void *fdt,  in setup_ima_buffer()  argument
275  * @extra_fdt_size:	Additional size for the new FDT buffer.
277  * Return: fdt on success, or NULL errno on error.
284 	void *fdt;  in of_kexec_alloc_and_setup_fdt()  local
293 	fdt = kvmalloc(fdt_size, GFP_KERNEL);  in of_kexec_alloc_and_setup_fdt()
294 	if (!fdt)  in of_kexec_alloc_and_setup_fdt()
297 	ret = fdt_open_into(initial_boot_params, fdt, fdt_size);  in of_kexec_alloc_and_setup_fdt()
304 	ret = fdt_find_and_del_mem_rsv(fdt, __pa(initial_boot_params),  in of_kexec_alloc_and_setup_fdt()
311 	chosen_node = fdt_path_offset(fdt, "/chosen");  in of_kexec_alloc_and_setup_fdt()
313 		chosen_node = fdt_add_subnode(fdt, fdt_path_offset(fdt, "/"),  in of_kexec_alloc_and_setup_fdt()
320 	ret = fdt_delprop(fdt, chosen_node, "linux,elfcorehdr");  in of_kexec_alloc_and_setup_fdt()
323 	ret = fdt_delprop(fdt, chosen_node, "linux,usable-memory-range");  in of_kexec_alloc_and_setup_fdt()
328 	prop = fdt_getprop(fdt, chosen_node, "linux,initrd-start", &len);  in of_kexec_alloc_and_setup_fdt()
334 		prop = fdt_getprop(fdt, chosen_node, "linux,initrd-end", &len);  in of_kexec_alloc_and_setup_fdt()
347 		ret = fdt_find_and_del_mem_rsv(fdt, tmp_start, tmp_size);  in of_kexec_alloc_and_setup_fdt()
349 			ret = fdt_find_and_del_mem_rsv(fdt, tmp_start,  in of_kexec_alloc_and_setup_fdt()
357 		ret = fdt_setprop_u64(fdt, chosen_node, "linux,initrd-start",  in of_kexec_alloc_and_setup_fdt()
362 		ret = fdt_setprop_u64(fdt, chosen_node, "linux,initrd-end",  in of_kexec_alloc_and_setup_fdt()
367 		ret = fdt_add_mem_rsv(fdt, initrd_load_addr, initrd_len);  in of_kexec_alloc_and_setup_fdt()
372 		ret = fdt_delprop(fdt, chosen_node, "linux,initrd-start");  in of_kexec_alloc_and_setup_fdt()
376 		ret = fdt_delprop(fdt, chosen_node, "linux,initrd-end");  in of_kexec_alloc_and_setup_fdt()
383 		ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,  in of_kexec_alloc_and_setup_fdt()
393 		ret = fdt_add_mem_rsv(fdt, image->elf_load_addr,  in of_kexec_alloc_and_setup_fdt()
400 		ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,  in of_kexec_alloc_and_setup_fdt()
407 			ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,  in of_kexec_alloc_and_setup_fdt()
419 		ret = fdt_setprop_string(fdt, chosen_node, "bootargs", cmdline);  in of_kexec_alloc_and_setup_fdt()
423 		ret = fdt_delprop(fdt, chosen_node, "bootargs");  in of_kexec_alloc_and_setup_fdt()
429 	ret = fdt_delprop(fdt, chosen_node, "kaslr-seed");  in of_kexec_alloc_and_setup_fdt()
438 		ret = fdt_setprop_u64(fdt, chosen_node, "kaslr-seed", seed);  in of_kexec_alloc_and_setup_fdt()
450 		ret = fdt_setprop_placeholder(fdt, chosen_node, "rng-seed",  in of_kexec_alloc_and_setup_fdt()
460 	ret = fdt_setprop(fdt, chosen_node, "linux,booted-from-kexec", NULL, 0);  in of_kexec_alloc_and_setup_fdt()
464 	remove_ima_buffer(fdt, chosen_node);  in of_kexec_alloc_and_setup_fdt()
465 	ret = setup_ima_buffer(image, fdt, fdt_path_offset(fdt, "/chosen"));  in of_kexec_alloc_and_setup_fdt()
469 		kvfree(fdt);  in of_kexec_alloc_and_setup_fdt()
470 		fdt = NULL;  in of_kexec_alloc_and_setup_fdt()
473 	return fdt;  in of_kexec_alloc_and_setup_fdt()