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#ifdef CONFIG_PARAVIRT_XXL 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#define PGD_KERNEL_START (CONFIG_PAGE_OFFSET >> PGDIR_SHIFT) 50 51#endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */ 52