1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_INIT_H 3 #define _ASM_X86_INIT_H 4 5 #if defined(CONFIG_CC_IS_CLANG) && CONFIG_CLANG_VERSION < 170000 6 #define __head __section(".head.text") __no_sanitize_undefined __no_stack_protector 7 #else 8 #define __head __section(".head.text") __no_sanitize_undefined 9 #endif 10 11 struct x86_mapping_info { 12 void *(*alloc_pgt_page)(void *); /* allocate buf for page table */ 13 void (*free_pgt_page)(void *, void *); /* free buf for page table */ 14 void *context; /* context for alloc_pgt_page */ 15 unsigned long page_flag; /* page flag for PMD or PUD entry */ 16 unsigned long offset; /* ident mapping offset */ 17 bool direct_gbpages; /* PUD level 1GB page support */ 18 unsigned long kernpg_flag; /* kernel pagetable flag override */ 19 }; 20 21 int kernel_ident_mapping_init(struct x86_mapping_info *info, pgd_t *pgd_page, 22 unsigned long pstart, unsigned long pend); 23 24 void kernel_ident_mapping_free(struct x86_mapping_info *info, pgd_t *pgd); 25 26 #endif /* _ASM_X86_INIT_H */ 27