1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _UAPILINUX_KEXEC_H 3*4882a593Smuzhiyun #define _UAPILINUX_KEXEC_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* kexec system call - It loads the new kernel to boot into. 6*4882a593Smuzhiyun * kexec does not sync, or unmount filesystems so if you need 7*4882a593Smuzhiyun * that to happen you need to do that yourself. 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/types.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* kexec flags for different usage scenarios */ 13*4882a593Smuzhiyun #define KEXEC_ON_CRASH 0x00000001 14*4882a593Smuzhiyun #define KEXEC_PRESERVE_CONTEXT 0x00000002 15*4882a593Smuzhiyun #define KEXEC_ARCH_MASK 0xffff0000 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* 18*4882a593Smuzhiyun * Kexec file load interface flags. 19*4882a593Smuzhiyun * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image. 20*4882a593Smuzhiyun * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image. 21*4882a593Smuzhiyun * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd 22*4882a593Smuzhiyun * fd field. 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun #define KEXEC_FILE_UNLOAD 0x00000001 25*4882a593Smuzhiyun #define KEXEC_FILE_ON_CRASH 0x00000002 26*4882a593Smuzhiyun #define KEXEC_FILE_NO_INITRAMFS 0x00000004 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun /* These values match the ELF architecture values. 29*4882a593Smuzhiyun * Unless there is a good reason that should continue to be the case. 30*4882a593Smuzhiyun */ 31*4882a593Smuzhiyun #define KEXEC_ARCH_DEFAULT ( 0 << 16) 32*4882a593Smuzhiyun #define KEXEC_ARCH_386 ( 3 << 16) 33*4882a593Smuzhiyun #define KEXEC_ARCH_68K ( 4 << 16) 34*4882a593Smuzhiyun #define KEXEC_ARCH_PARISC (15 << 16) 35*4882a593Smuzhiyun #define KEXEC_ARCH_X86_64 (62 << 16) 36*4882a593Smuzhiyun #define KEXEC_ARCH_PPC (20 << 16) 37*4882a593Smuzhiyun #define KEXEC_ARCH_PPC64 (21 << 16) 38*4882a593Smuzhiyun #define KEXEC_ARCH_IA_64 (50 << 16) 39*4882a593Smuzhiyun #define KEXEC_ARCH_ARM (40 << 16) 40*4882a593Smuzhiyun #define KEXEC_ARCH_S390 (22 << 16) 41*4882a593Smuzhiyun #define KEXEC_ARCH_SH (42 << 16) 42*4882a593Smuzhiyun #define KEXEC_ARCH_MIPS_LE (10 << 16) 43*4882a593Smuzhiyun #define KEXEC_ARCH_MIPS ( 8 << 16) 44*4882a593Smuzhiyun #define KEXEC_ARCH_AARCH64 (183 << 16) 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* The artificial cap on the number of segments passed to kexec_load. */ 47*4882a593Smuzhiyun #define KEXEC_SEGMENT_MAX 16 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun #ifndef __KERNEL__ 50*4882a593Smuzhiyun /* 51*4882a593Smuzhiyun * This structure is used to hold the arguments that are used when 52*4882a593Smuzhiyun * loading kernel binaries. 53*4882a593Smuzhiyun */ 54*4882a593Smuzhiyun struct kexec_segment { 55*4882a593Smuzhiyun const void *buf; 56*4882a593Smuzhiyun size_t bufsz; 57*4882a593Smuzhiyun const void *mem; 58*4882a593Smuzhiyun size_t memsz; 59*4882a593Smuzhiyun }; 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun #endif /* __KERNEL__ */ 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun #endif /* _UAPILINUX_KEXEC_H */ 64