1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Image loader for kexec_file_load system call.
4 *
5 * Copyright IBM Corp. 2018
6 *
7 * Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com>
8 */
9
10 #include <linux/errno.h>
11 #include <linux/kernel.h>
12 #include <linux/kexec.h>
13 #include <asm/ipl.h>
14 #include <asm/setup.h>
15
16 static int kexec_file_add_kernel_image(struct kimage *image,
17 struct s390_load_data *data)
18 {
19 struct kexec_buf buf;
20
21 buf.image = image;
22
23 buf.buffer = image->kernel_buf;
24 buf.bufsz = image->kernel_buf_len;
25
26 buf.mem = 0;
27 #ifdef CONFIG_CRASH_DUMP
28 if (image->type == KEXEC_TYPE_CRASH)
29 buf.mem += crashk_res.start;
30 #endif
31 buf.memsz = buf.bufsz;
32
33 data->kernel_buf = image->kernel_buf;
34 data->kernel_mem = buf.mem;
35 data->parm = image->kernel_buf + PARMAREA;
36 data->memsz += buf.memsz;
37
38 ipl_report_add_component(data->report, &buf,
39 IPL_RB_COMPONENT_FLAG_SIGNED |
40 IPL_RB_COMPONENT_FLAG_VERIFIED,
41 IPL_RB_CERT_UNKNOWN);
42 return kexec_add_buffer(&buf);
43 }
44
45 static void *s390_image_load(struct kimage *image,
46 char *kernel, unsigned long kernel_len,
47 char *initrd, unsigned long initrd_len,
48 char *cmdline, unsigned long cmdline_len)
49 {
50 return kexec_file_add_components(image, kexec_file_add_kernel_image);
51 }
52
53 static int s390_image_probe(const char *buf, unsigned long len)
54 {
55 /* Can't reliably tell if an image is valid. Therefore give the
56 * user whatever he wants.
57 */
58 return 0;
59 }
60
61 const struct kexec_file_ops s390_kexec_image_ops = {
62 .probe = s390_image_probe,
63 .load = s390_image_load,
64 #ifdef CONFIG_KEXEC_SIG
65 .verify_sig = s390_verify_sig,
66 #endif /* CONFIG_KEXEC_SIG */
67 };
68
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