1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_PGTABLE_64_DEFS_H 3 #define _ASM_X86_PGTABLE_64_DEFS_H 4 5 #include <asm/sparsemem.h> 6 7 #ifndef __ASSEMBLY__ 8 #include <linux/types.h> 9 #include <asm/kaslr.h> 10 11 /* 12 * These are used to make use of C type-checking.. 13 */ 14 typedef unsigned long pteval_t; 15 typedef unsigned long pmdval_t; 16 typedef unsigned long pudval_t; 17 typedef unsigned long p4dval_t; 18 typedef unsigned long pgdval_t; 19 typedef unsigned long pgprotval_t; 20 21 typedef struct { pteval_t pte; } pte_t; 22 23 #ifdef CONFIG_X86_5LEVEL 24 extern unsigned int __pgtable_l5_enabled; 25 #ifndef pgtable_l5_enabled 26 #define pgtable_l5_enabled cpu_feature_enabled(X86_FEATURE_LA57) 27 #endif 28 #else 29 #define pgtable_l5_enabled 0 30 #endif 31 32 extern unsigned int pgdir_shift; 33 extern unsigned int ptrs_per_p4d; 34 35 #endif /* !__ASSEMBLY__ */ 36 37 #define SHARED_KERNEL_PMD 0 38 39 #ifdef CONFIG_X86_5LEVEL 40 41 /* 42 * PGDIR_SHIFT determines what a top-level page table entry can map 43 */ 44 #define PGDIR_SHIFT pgdir_shift 45 #define PTRS_PER_PGD 512 46 47 /* 48 * 4th level page in 5-level paging case 49 */ 50 #define P4D_SHIFT 39 51 #define MAX_PTRS_PER_P4D 512 52 #define PTRS_PER_P4D ptrs_per_p4d 53 #define P4D_SIZE (_AC(1, UL) << P4D_SHIFT) 54 #define P4D_MASK (~(P4D_SIZE - 1)) 55 56 #define MAX_POSSIBLE_PHYSMEM_BITS 52 57 58 #else /* CONFIG_X86_5LEVEL */ 59 60 /* 61 * PGDIR_SHIFT determines what a top-level page table entry can map 62 */ 63 #define PGDIR_SHIFT 39 64 #define PTRS_PER_PGD 512 65 #define MAX_PTRS_PER_P4D 1 66 67 #endif /* CONFIG_X86_5LEVEL */ 68 69 /* 70 * 3rd level page 71 */ 72 #define PUD_SHIFT 30 73 #define PTRS_PER_PUD 512 74 75 /* 76 * PMD_SHIFT determines the size of the area a middle-level 77 * page table can map 78 */ 79 #define PMD_SHIFT 21 80 #define PTRS_PER_PMD 512 81 82 /* 83 * entries per page directory level 84 */ 85 #define PTRS_PER_PTE 512 86 87 #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) 88 #define PMD_MASK (~(PMD_SIZE - 1)) 89 #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) 90 #define PUD_MASK (~(PUD_SIZE - 1)) 91 #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) 92 #define PGDIR_MASK (~(PGDIR_SIZE - 1)) 93 94 /* 95 * See Documentation/x86/x86_64/mm.txt for a description of the memory map. 96 * 97 * Be very careful vs. KASLR when changing anything here. The KASLR address 98 * range must not overlap with anything except the KASAN shadow area, which 99 * is correct as KASAN disables KASLR. 100 */ 101 #define MAXMEM (1UL << MAX_PHYSMEM_BITS) 102 103 #define LDT_PGD_ENTRY_L4 -3UL 104 #define LDT_PGD_ENTRY_L5 -112UL 105 #define LDT_PGD_ENTRY (pgtable_l5_enabled ? LDT_PGD_ENTRY_L5 : LDT_PGD_ENTRY_L4) 106 #define LDT_BASE_ADDR (LDT_PGD_ENTRY << PGDIR_SHIFT) 107 108 #define __VMALLOC_BASE_L4 0xffffc90000000000UL 109 #define __VMALLOC_BASE_L5 0xffa0000000000000UL 110 111 #define VMALLOC_SIZE_TB_L4 32UL 112 #define VMALLOC_SIZE_TB_L5 12800UL 113 114 #define __VMEMMAP_BASE_L4 0xffffea0000000000UL 115 #define __VMEMMAP_BASE_L5 0xffd4000000000000UL 116 117 #ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT 118 # define VMALLOC_START vmalloc_base 119 # define VMALLOC_SIZE_TB (pgtable_l5_enabled ? VMALLOC_SIZE_TB_L5 : VMALLOC_SIZE_TB_L4) 120 # define VMEMMAP_START vmemmap_base 121 #else 122 # define VMALLOC_START __VMALLOC_BASE_L4 123 # define VMALLOC_SIZE_TB VMALLOC_SIZE_TB_L4 124 # define VMEMMAP_START __VMEMMAP_BASE_L4 125 #endif /* CONFIG_DYNAMIC_MEMORY_LAYOUT */ 126 127 #define VMALLOC_END (VMALLOC_START + (VMALLOC_SIZE_TB << 40) - 1) 128 129 #define MODULES_VADDR (__START_KERNEL_map + KERNEL_IMAGE_SIZE) 130 /* The module sections ends with the start of the fixmap */ 131 #define MODULES_END _AC(0xffffffffff000000, UL) 132 #define MODULES_LEN (MODULES_END - MODULES_VADDR) 133 134 #define ESPFIX_PGD_ENTRY _AC(-2, UL) 135 #define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << P4D_SHIFT) 136 137 #define CPU_ENTRY_AREA_PGD _AC(-4, UL) 138 #define CPU_ENTRY_AREA_BASE (CPU_ENTRY_AREA_PGD << P4D_SHIFT) 139 140 #define EFI_VA_START ( -4 * (_AC(1, UL) << 30)) 141 #define EFI_VA_END (-68 * (_AC(1, UL) << 30)) 142 143 #define EARLY_DYNAMIC_PAGE_TABLES 64 144 145 #endif /* _ASM_X86_PGTABLE_64_DEFS_H */ 146