1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_PGTABLE_3LEVEL_DEFS_H
3 #define _ASM_X86_PGTABLE_3LEVEL_DEFS_H
4 
5 #ifndef __ASSEMBLY__
6 #include <linux/types.h>
7 
8 typedef u64	pteval_t;
9 typedef u64	pmdval_t;
10 typedef u64	pudval_t;
11 typedef u64	p4dval_t;
12 typedef u64	pgdval_t;
13 typedef u64	pgprotval_t;
14 
15 typedef union {
16 	struct {
17 		unsigned long pte_low, pte_high;
18 	};
19 	pteval_t pte;
20 } pte_t;
21 #endif	/* !__ASSEMBLY__ */
22 
23 #ifdef CONFIG_PARAVIRT
24 #define SHARED_KERNEL_PMD	((!static_cpu_has(X86_FEATURE_PTI) &&	\
25 				 (pv_info.shared_kernel_pmd)))
26 #else
27 #define SHARED_KERNEL_PMD	(!static_cpu_has(X86_FEATURE_PTI))
28 #endif
29 
30 /*
31  * PGDIR_SHIFT determines what a top-level page table entry can map
32  */
33 #define PGDIR_SHIFT	30
34 #define PTRS_PER_PGD	4
35 
36 /*
37  * PMD_SHIFT determines the size of the area a middle-level
38  * page table can map
39  */
40 #define PMD_SHIFT	21
41 #define PTRS_PER_PMD	512
42 
43 /*
44  * entries per page directory level
45  */
46 #define PTRS_PER_PTE	512
47 
48 #define MAX_POSSIBLE_PHYSMEM_BITS	36
49 
50 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */
51