include/uapi/linux/kexec.h

   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_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_X86_64  (62 << 16)
  35 #define KEXEC_ARCH_PPC     (20 << 16)
  36 #define KEXEC_ARCH_PPC64   (21 << 16)
  37 #define KEXEC_ARCH_IA_64   (50 << 16)
  38 #define KEXEC_ARCH_ARM     (40 << 16)
  39 #define KEXEC_ARCH_S390    (22 << 16)
  40 #define KEXEC_ARCH_SH      (42 << 16)
  41 #define KEXEC_ARCH_MIPS_LE (10 << 16)
  42 #define KEXEC_ARCH_MIPS    ( 8 << 16)
  43 #define KEXEC_ARCH_AARCH64 (183 << 16)
  44
  45 /* The artificial cap on the number of segments passed to kexec_load. */
  46 #define KEXEC_SEGMENT_MAX 16
  47
  48 #ifndef __KERNEL__
  49 /*
  50  * This structure is used to hold the arguments that are used when
  51  * loading  kernel binaries.
  52  */
  53 struct kexec_segment {
  54         const void *buf;
  55         size_t bufsz;
  56         const void *mem;
  57         size_t memsz;
  58 };
  59
  60 #endif /* __KERNEL__ */
  61
  62 #endif /* _UAPILINUX_KEXEC_H */