Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPILINUX_KEXEC_H
3#define _UAPILINUX_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_UPDATE_ELFCOREHDR 0x00000004
16#define KEXEC_CRASH_HOTPLUG_SUPPORT 0x00000008
17#define KEXEC_ARCH_MASK 0xffff0000
18
19/*
20 * Kexec file load interface flags.
21 * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image.
22 * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image.
23 * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd
24 * fd field.
25 * KEXEC_FILE_FORCE_DTB : Force carrying over the current boot's DTB to the new
26 * kernel on x86. This is already the default behavior on
27 * some other architectures, like ARM64 and PowerPC.
28 */
29#define KEXEC_FILE_UNLOAD 0x00000001
30#define KEXEC_FILE_ON_CRASH 0x00000002
31#define KEXEC_FILE_NO_INITRAMFS 0x00000004
32#define KEXEC_FILE_DEBUG 0x00000008
33#define KEXEC_FILE_NO_CMA 0x00000010
34#define KEXEC_FILE_FORCE_DTB 0x00000020
35
36/* These values match the ELF architecture values.
37 * Unless there is a good reason that should continue to be the case.
38 */
39#define KEXEC_ARCH_DEFAULT ( 0 << 16)
40#define KEXEC_ARCH_386 ( 3 << 16)
41#define KEXEC_ARCH_68K ( 4 << 16)
42#define KEXEC_ARCH_PARISC (15 << 16)
43#define KEXEC_ARCH_X86_64 (62 << 16)
44#define KEXEC_ARCH_PPC (20 << 16)
45#define KEXEC_ARCH_PPC64 (21 << 16)
46#define KEXEC_ARCH_IA_64 (50 << 16)
47#define KEXEC_ARCH_ARM (40 << 16)
48#define KEXEC_ARCH_S390 (22 << 16)
49#define KEXEC_ARCH_SH (42 << 16)
50#define KEXEC_ARCH_MIPS_LE (10 << 16)
51#define KEXEC_ARCH_MIPS ( 8 << 16)
52#define KEXEC_ARCH_AARCH64 (183 << 16)
53#define KEXEC_ARCH_RISCV (243 << 16)
54#define KEXEC_ARCH_LOONGARCH (258 << 16)
55
56/* The artificial cap on the number of segments passed to kexec_load. */
57#define KEXEC_SEGMENT_MAX 16
58
59#ifndef __KERNEL__
60/*
61 * This structure is used to hold the arguments that are used when
62 * loading kernel binaries.
63 */
64struct kexec_segment {
65 const void *buf;
66 __kernel_size_t bufsz;
67 const void *mem;
68 __kernel_size_t memsz;
69};
70
71#endif /* __KERNEL__ */
72
73#endif /* _UAPILINUX_KEXEC_H */