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#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