linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef LINUX_KEXEC_H
3 #define LINUX_KEXEC_H
4
5 /* kexec system call - It loads the new kernel to boot into.
6 * kexec does not sync, or unmount filesystems so if you need
7 * that to happen you need to do that yourself.
8 */
9
10 #include <linux/types.h>
11
12 /* kexec flags for different usage scenarios */
13 #define KEXEC_ON_CRASH 0x00000001
14 #define KEXEC_PRESERVE_CONTEXT 0x00000002
15 #define KEXEC_ARCH_MASK 0xffff0000
16
17 /*
18 * Kexec file load interface flags.
19 * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image.
20 * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image.
21 * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd
22 * fd field.
23 */
24 #define KEXEC_FILE_UNLOAD 0x00000001
25 #define KEXEC_FILE_ON_CRASH 0x00000002
26 #define KEXEC_FILE_NO_INITRAMFS 0x00000004
27
28 /* These values match the ELF architecture values.
29 * Unless there is a good reason that should continue to be the case.
30 */
31 #define KEXEC_ARCH_DEFAULT ( 0 << 16)
32 #define KEXEC_ARCH_386 ( 3 << 16)
33 #define KEXEC_ARCH_68K ( 4 << 16)
34 #define KEXEC_ARCH_PARISC (15 << 16)
35 #define KEXEC_ARCH_X86_64 (62 << 16)
36 #define KEXEC_ARCH_PPC (20 << 16)
37 #define KEXEC_ARCH_PPC64 (21 << 16)
38 #define KEXEC_ARCH_IA_64 (50 << 16)
39 #define KEXEC_ARCH_ARM (40 << 16)
40 #define KEXEC_ARCH_S390 (22 << 16)
41 #define KEXEC_ARCH_SH (42 << 16)
42 #define KEXEC_ARCH_MIPS_LE (10 << 16)
43 #define KEXEC_ARCH_MIPS ( 8 << 16)
44 #define KEXEC_ARCH_AARCH64 (183 << 16)
45 #define KEXEC_ARCH_RISCV (243 << 16)
46 #define KEXEC_ARCH_LOONGARCH (258 << 16)
47
48 /* The artificial cap on the number of segments passed to kexec_load. */
49 #define KEXEC_SEGMENT_MAX 16
50
51 /*
52 * This structure is used to hold the arguments that are used when
53 * loading kernel binaries.
54 */
55 struct kexec_segment {
56 const void *buf;
57 __kernel_size_t bufsz;
58 const void *mem;
59 __kernel_size_t memsz;
60 };
61
62
63 #endif /* LINUX_KEXEC_H */
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