mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-16 07:51:31 -04:00
55d990f008
This patch creates kexec_efi_ops to load EFI binary file for kexec_file_load() syscall. The efi_kexec_load() as two parts: - the first part loads the kernel image (vmlinuz.efi or vmlinux.efi) - the second part loads other segments (e.g: initrd, cmdline, etc) Currently, pez (vmlinuz.efi) and pei (vmlinux.efi) format images are supported. The basic usage (vmlinuz.efi or vmlinux.efi): 1) Load second kernel image: # kexec -s -l vmlinuz.efi --initrd=initrd.img --reuse-cmdline 2) Startup second kernel: # kexec -e Signed-off-by: Youling Tang <tangyouling@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* LoongArch binary image header for EFI(PE/COFF) format.
|
|
*
|
|
* Author: Youling Tang <tangyouling@kylinos.cn>
|
|
* Copyright (C) 2025 KylinSoft Corporation.
|
|
*/
|
|
|
|
#ifndef __ASM_IMAGE_H
|
|
#define __ASM_IMAGE_H
|
|
|
|
#ifndef __ASSEMBLER__
|
|
|
|
/**
|
|
* struct loongarch_image_header
|
|
*
|
|
* @dos_sig: Optional PE format 'MZ' signature.
|
|
* @padding_1: Reserved.
|
|
* @kernel_entry: Kernel image entry pointer.
|
|
* @kernel_asize: An estimated size of the memory image size in LSB byte order.
|
|
* @text_offset: The image load offset in LSB byte order.
|
|
* @padding_2: Reserved.
|
|
* @pe_header: Optional offset to a PE format header.
|
|
**/
|
|
|
|
struct loongarch_image_header {
|
|
uint8_t dos_sig[2];
|
|
uint16_t padding_1[3];
|
|
uint64_t kernel_entry;
|
|
uint64_t kernel_asize;
|
|
uint64_t text_offset;
|
|
uint32_t padding_2[7];
|
|
uint32_t pe_header;
|
|
};
|
|
|
|
/*
|
|
* loongarch_header_check_dos_sig - Helper to check the header
|
|
*
|
|
* Returns true (non-zero) if 'MZ' signature is found.
|
|
*/
|
|
|
|
static inline int loongarch_header_check_dos_sig(const struct loongarch_image_header *h)
|
|
{
|
|
if (!h)
|
|
return 0;
|
|
|
|
return (h->dos_sig[0] == 'M' && h->dos_sig[1] == 'Z');
|
|
}
|
|
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
#endif /* __ASM_IMAGE_H */
|