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_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 #define ARCH_PAGE_TABLE_SYNC_MASK (SHARED_KERNEL_PMD ? 0 : PGTBL_PMD_MODIFIED) 31 32 /* 33 * PGDIR_SHIFT determines what a top-level page table entry can map 34 */ 35 #define PGDIR_SHIFT 30 36 #define PTRS_PER_PGD 4 37 38 /* 39 * PMD_SHIFT determines the size of the area a middle-level 40 * page table can map 41 */ 42 #define PMD_SHIFT 21 43 #define PTRS_PER_PMD 512 44 45 /* 46 * entries per page directory level 47 */ 48 #define PTRS_PER_PTE 512 49 50 #define MAX_POSSIBLE_PHYSMEM_BITS 36 51 #define PGD_KERNEL_START (CONFIG_PAGE_OFFSET >> PGDIR_SHIFT) 52 53 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */ 54