1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux <<
2 #ifndef _UAPILINUX_KEXEC_H 1 #ifndef _UAPILINUX_KEXEC_H
3 #define _UAPILINUX_KEXEC_H 2 #define _UAPILINUX_KEXEC_H
4 3
5 /* kexec system call - It loads the new kerne 4 /* kexec system call - It loads the new kernel to boot into.
6 * kexec does not sync, or unmount filesystems 5 * kexec does not sync, or unmount filesystems so if you need
7 * that to happen you need to do that yourself 6 * that to happen you need to do that yourself.
8 */ 7 */
9 8
10 #include <linux/types.h> 9 #include <linux/types.h>
11 10
12 /* kexec flags for different usage scenarios * 11 /* kexec flags for different usage scenarios */
13 #define KEXEC_ON_CRASH 0x00000001 12 #define KEXEC_ON_CRASH 0x00000001
14 #define KEXEC_PRESERVE_CONTEXT 0x00000002 13 #define KEXEC_PRESERVE_CONTEXT 0x00000002
15 #define KEXEC_UPDATE_ELFCOREHDR 0x00000004 <<
16 #define KEXEC_CRASH_HOTPLUG_SUPPORT 0x00000008 <<
17 #define KEXEC_ARCH_MASK 0xffff0000 14 #define KEXEC_ARCH_MASK 0xffff0000
18 15
19 /* <<
20 * Kexec file load interface flags. <<
21 * KEXEC_FILE_UNLOAD : Unload already loaded k <<
22 * KEXEC_FILE_ON_CRASH : Load/unload operation <<
23 * KEXEC_FILE_NO_INITRAMFS : No initramfs is b <<
24 * fd field. <<
25 */ <<
26 #define KEXEC_FILE_UNLOAD 0x00000001 <<
27 #define KEXEC_FILE_ON_CRASH 0x00000002 <<
28 #define KEXEC_FILE_NO_INITRAMFS 0x00000004 <<
29 #define KEXEC_FILE_DEBUG 0x00000008 <<
30 <<
31 /* These values match the ELF architecture val 16 /* These values match the ELF architecture values.
32 * Unless there is a good reason that should c 17 * Unless there is a good reason that should continue to be the case.
33 */ 18 */
34 #define KEXEC_ARCH_DEFAULT ( 0 << 16) 19 #define KEXEC_ARCH_DEFAULT ( 0 << 16)
35 #define KEXEC_ARCH_386 ( 3 << 16) 20 #define KEXEC_ARCH_386 ( 3 << 16)
36 #define KEXEC_ARCH_68K ( 4 << 16) <<
37 #define KEXEC_ARCH_PARISC (15 << 16) <<
38 #define KEXEC_ARCH_X86_64 (62 << 16) 21 #define KEXEC_ARCH_X86_64 (62 << 16)
39 #define KEXEC_ARCH_PPC (20 << 16) 22 #define KEXEC_ARCH_PPC (20 << 16)
40 #define KEXEC_ARCH_PPC64 (21 << 16) 23 #define KEXEC_ARCH_PPC64 (21 << 16)
41 #define KEXEC_ARCH_IA_64 (50 << 16) 24 #define KEXEC_ARCH_IA_64 (50 << 16)
42 #define KEXEC_ARCH_ARM (40 << 16) 25 #define KEXEC_ARCH_ARM (40 << 16)
43 #define KEXEC_ARCH_S390 (22 << 16) 26 #define KEXEC_ARCH_S390 (22 << 16)
44 #define KEXEC_ARCH_SH (42 << 16) 27 #define KEXEC_ARCH_SH (42 << 16)
45 #define KEXEC_ARCH_MIPS_LE (10 << 16) 28 #define KEXEC_ARCH_MIPS_LE (10 << 16)
46 #define KEXEC_ARCH_MIPS ( 8 << 16) 29 #define KEXEC_ARCH_MIPS ( 8 << 16)
47 #define KEXEC_ARCH_AARCH64 (183 << 16) <<
48 #define KEXEC_ARCH_RISCV (243 << 16) <<
49 #define KEXEC_ARCH_LOONGARCH (258 << 16) <<
50 30
51 /* The artificial cap on the number of segment 31 /* The artificial cap on the number of segments passed to kexec_load. */
52 #define KEXEC_SEGMENT_MAX 16 32 #define KEXEC_SEGMENT_MAX 16
53 33
54 #ifndef __KERNEL__ 34 #ifndef __KERNEL__
55 /* 35 /*
56 * This structure is used to hold the argument 36 * This structure is used to hold the arguments that are used when
57 * loading kernel binaries. 37 * loading kernel binaries.
58 */ 38 */
59 struct kexec_segment { 39 struct kexec_segment {
60 const void *buf; 40 const void *buf;
61 __kernel_size_t bufsz; !! 41 size_t bufsz;
62 const void *mem; 42 const void *mem;
63 __kernel_size_t memsz; !! 43 size_t memsz;
64 }; 44 };
65 45
>> 46 /* Load a new kernel image as described by the kexec_segment array
>> 47 * consisting of passed number of segments at the entry-point address.
>> 48 * The flags allow different useage types.
>> 49 */
>> 50 extern int kexec_load(void *, size_t, struct kexec_segment *,
>> 51 unsigned long int);
66 #endif /* __KERNEL__ */ 52 #endif /* __KERNEL__ */
67 53
68 #endif /* _UAPILINUX_KEXEC_H */ 54 #endif /* _UAPILINUX_KEXEC_H */
69 55
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