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 #define SHARED_KERNEL_PMD (!static_cpu_has(X86_FEATURE_PTI)) 24 25 #define ARCH_PAGE_TABLE_SYNC_MASK (SHARED_KERNEL_PMD ? 0 : PGTBL_PMD_MODIFIED) 26 27 /* 28 * PGDIR_SHIFT determines what a top-level page table entry can map 29 */ 30 #define PGDIR_SHIFT 30 31 #define PTRS_PER_PGD 4 32 33 /* 34 * PMD_SHIFT determines the size of the area a middle-level 35 * page table can map 36 */ 37 #define PMD_SHIFT 21 38 #define PTRS_PER_PMD 512 39 40 /* 41 * entries per page directory level 42 */ 43 #define PTRS_PER_PTE 512 44 45 #define MAX_POSSIBLE_PHYSMEM_BITS 36 46 #define PGD_KERNEL_START (CONFIG_PAGE_OFFSET >> PGDIR_SHIFT) 47 48 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */ 49