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e49bb0a2 PR |
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> | |
99feaa71 | 13 | #include <asm/ipl.h> |
e49bb0a2 PR |
14 | #include <asm/setup.h> |
15 | ||
8e496426 PR |
16 | static int kexec_file_add_kernel_image(struct kimage *image, |
17 | struct s390_load_data *data) | |
e49bb0a2 PR |
18 | { |
19 | struct kexec_buf buf; | |
e49bb0a2 PR |
20 | |
21 | buf.image = image; | |
22 | ||
653beba2 PR |
23 | buf.buffer = image->kernel_buf; |
24 | buf.bufsz = image->kernel_buf_len; | |
e49bb0a2 | 25 | |
653beba2 | 26 | buf.mem = 0; |
ee337f54 PR |
27 | if (image->type == KEXEC_TYPE_CRASH) |
28 | buf.mem += crashk_res.start; | |
e49bb0a2 PR |
29 | buf.memsz = buf.bufsz; |
30 | ||
8e496426 | 31 | data->kernel_buf = image->kernel_buf; |
653beba2 | 32 | data->kernel_mem = buf.mem; |
8e496426 | 33 | data->parm = image->kernel_buf + PARMAREA; |
653beba2 | 34 | data->memsz += buf.memsz; |
e49bb0a2 | 35 | |
99feaa71 PR |
36 | ipl_report_add_component(data->report, &buf, |
37 | IPL_RB_COMPONENT_FLAG_SIGNED | | |
38 | IPL_RB_COMPONENT_FLAG_VERIFIED, | |
39 | IPL_RB_CERT_UNKNOWN); | |
8e496426 | 40 | return kexec_add_buffer(&buf); |
e49bb0a2 PR |
41 | } |
42 | ||
43 | static void *s390_image_load(struct kimage *image, | |
44 | char *kernel, unsigned long kernel_len, | |
45 | char *initrd, unsigned long initrd_len, | |
46 | char *cmdline, unsigned long cmdline_len) | |
47 | { | |
8e496426 | 48 | return kexec_file_add_components(image, kexec_file_add_kernel_image); |
e49bb0a2 PR |
49 | } |
50 | ||
51 | static int s390_image_probe(const char *buf, unsigned long len) | |
52 | { | |
53 | /* Can't reliably tell if an image is valid. Therefore give the | |
54 | * user whatever he wants. | |
55 | */ | |
56 | return 0; | |
57 | } | |
58 | ||
59 | const struct kexec_file_ops s390_kexec_image_ops = { | |
60 | .probe = s390_image_probe, | |
61 | .load = s390_image_load, | |
99d5cadf | 62 | #ifdef CONFIG_KEXEC_SIG |
e23a8020 | 63 | .verify_sig = s390_verify_sig, |
99d5cadf | 64 | #endif /* CONFIG_KEXEC_SIG */ |
e49bb0a2 | 65 | }; |