1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright 2023 Google LLC 3 // Author: Ard Biesheuvel <ardb@google.com> 4 5 #include <linux/types.h> 6 7 #define __prel64_initconst __section(".init.rodata.prel64") 8 9 #define PREL64(type, name) union { type *name; prel64_t name ## _prel; } 10 11 #define prel64_pointer(__d) (typeof(__d))prel64_to_pointer(&__d##_prel) 12 13 typedef volatile signed long prel64_t; 14 15 static inline void *prel64_to_pointer(const prel64_t *offset) 16 { 17 if (!*offset) 18 return NULL; 19 return (void *)offset + *offset; 20 } 21 22 extern bool dynamic_scs_is_enabled; 23 24 extern pgd_t init_idmap_pg_dir[], init_idmap_pg_end[]; 25 26 void init_feature_override(u64 boot_status, const void *fdt, int chosen); 27 u64 kaslr_early_init(void *fdt, int chosen); 28 void relocate_kernel(u64 offset); 29 int scs_patch(const u8 eh_frame[], int size); 30 31 void map_range(u64 *pgd, u64 start, u64 end, u64 pa, pgprot_t prot, 32 int level, pte_t *tbl, bool may_use_cont, u64 va_offset); 33 34 asmlinkage void early_map_kernel(u64 boot_status, void *fdt); 35 36 asmlinkage u64 create_init_idmap(pgd_t *pgd, pteval_t clrmask); 37