include/linux/purgatory.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _LINUX_PURGATORY_H
0003 #define _LINUX_PURGATORY_H
0004
0005 #include <linux/types.h>
0006 #include <crypto/sha2.h>
0007 #include <uapi/linux/kexec.h>
0008
0009 struct kexec_sha_region {
0010     unsigned long start;
0011     unsigned long len;
0012 };
0013
0014 /*
0015  * These forward declarations serve two purposes:
0016  *
0017  * 1) Make sparse happy when checking arch/purgatory
0018  * 2) Document that these are required to be global so the symbol
0019  *    lookup in kexec works
0020  */
0021 extern struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX];
0022 extern u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE];
0023
0024 #endif