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 8typedef u64 pteval_t; 9typedef u64 pmdval_t; 10typedef u64 pudval_t; 11typedef u64 p4dval_t; 12typedef u64 pgdval_t; 13typedef u64 pgprotval_t; 14 15typedef union { 16 struct { 17 unsigned long pte_low, pte_high; 18 }; 19 pteval_t pte; 20} pte_t; 21 22typedef union { 23 struct { 24 unsigned long pmd_low, pmd_high; 25 }; 26 pmdval_t pmd; 27} pmd_t; 28#endif /* !__ASSEMBLY__ */ 29 30#define SHARED_KERNEL_PMD (!static_cpu_has(X86_FEATURE_PTI)) 31 32#define ARCH_PAGE_TABLE_SYNC_MASK (SHARED_KERNEL_PMD ? 0 : PGTBL_PMD_MODIFIED) 33 34/* 35 * PGDIR_SHIFT determines what a top-level page table entry can map 36 */ 37#define PGDIR_SHIFT 30 38#define PTRS_PER_PGD 4 39 40/* 41 * PMD_SHIFT determines the size of the area a middle-level 42 * page table can map 43 */ 44#define PMD_SHIFT 21 45#define PTRS_PER_PMD 512 46 47/* 48 * entries per page directory level 49 */ 50#define PTRS_PER_PTE 512 51 52#define MAX_POSSIBLE_PHYSMEM_BITS 36 53#define PGD_KERNEL_START (CONFIG_PAGE_OFFSET >> PGDIR_SHIFT) 54 55#endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */ 56