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