1 // SPDX-License-Identifier: GPL-2.0
3 * Image loader for kexec_file_load system call.
5 * Copyright IBM Corp. 2018
7 * Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com>
10 #include <linux/errno.h>
11 #include <linux/kernel.h>
12 #include <linux/kexec.h>
13 #include <asm/setup.h>
15 static int kexec_file_add_image_kernel(struct kimage *image,
16 struct s390_load_data *data,
17 char *kernel, unsigned long kernel_len)
24 buf.buffer = kernel + STARTUP_NORMAL_OFFSET;
25 buf.bufsz = kernel_len - STARTUP_NORMAL_OFFSET;
27 buf.mem = STARTUP_NORMAL_OFFSET;
28 if (image->type == KEXEC_TYPE_CRASH)
29 buf.mem += crashk_res.start;
30 buf.memsz = buf.bufsz;
32 ret = kexec_add_buffer(&buf);
34 data->kernel_buf = kernel;
35 data->memsz += buf.memsz + STARTUP_NORMAL_OFFSET;
40 static void *s390_image_load(struct kimage *image,
41 char *kernel, unsigned long kernel_len,
42 char *initrd, unsigned long initrd_len,
43 char *cmdline, unsigned long cmdline_len)
45 struct s390_load_data data = {0};
48 ret = kexec_file_add_image_kernel(image, &data, kernel, kernel_len);
53 ret = kexec_file_add_initrd(image, &data, initrd, initrd_len);
58 ret = kexec_file_add_purgatory(image, &data);
62 return kexec_file_update_kernel(image, &data);
65 static int s390_image_probe(const char *buf, unsigned long len)
67 /* Can't reliably tell if an image is valid. Therefore give the
68 * user whatever he wants.
73 const struct kexec_file_ops s390_kexec_image_ops = {
74 .probe = s390_image_probe,
75 .load = s390_image_load,