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(kbuf: &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 | |