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 #endif /* !__ASSEMBLY__ */ 24 25 #define SHARED_KERNEL_PMD 0 26 27 #ifdef CONFIG_X86_5LEVEL 28 29 /* 30 * PGDIR_SHIFT determines what a top-level page table entry can map 31 */ 32 #define PGDIR_SHIFT 48 33 #define PTRS_PER_PGD 512 34 35 /* 36 * 4th level page in 5-level paging case 37 */ 38 #define P4D_SHIFT 39 39 #define PTRS_PER_P4D 512 40 #define P4D_SIZE (_AC(1, UL) << P4D_SHIFT) 41 #define P4D_MASK (~(P4D_SIZE - 1)) 42 43 #else /* CONFIG_X86_5LEVEL */ 44 45 /* 46 * PGDIR_SHIFT determines what a top-level page table entry can map 47 */ 48 #define PGDIR_SHIFT 39 49 #define PTRS_PER_PGD 512 50 51 #endif /* CONFIG_X86_5LEVEL */ 52 53 /* 54 * 3rd level page 55 */ 56 #define PUD_SHIFT 30 57 #define PTRS_PER_PUD 512 58 59 /* 60 * PMD_SHIFT determines the size of the area a middle-level 61 * page table can map 62 */ 63 #define PMD_SHIFT 21 64 #define PTRS_PER_PMD 512 65 66 /* 67 * entries per page directory level 68 */ 69 #define PTRS_PER_PTE 512 70 71 #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) 72 #define PMD_MASK (~(PMD_SIZE - 1)) 73 #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) 74 #define PUD_MASK (~(PUD_SIZE - 1)) 75 #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) 76 #define PGDIR_MASK (~(PGDIR_SIZE - 1)) 77 78 /* 79 * See Documentation/x86/x86_64/mm.txt for a description of the memory map. 80 * 81 * Be very careful vs. KASLR when changing anything here. The KASLR address 82 * range must not overlap with anything except the KASAN shadow area, which 83 * is correct as KASAN disables KASLR. 84 */ 85 #define MAXMEM _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL) 86 87 #ifdef CONFIG_X86_5LEVEL 88 # define VMALLOC_SIZE_TB _AC(12800, UL) 89 # define __VMALLOC_BASE _AC(0xffa0000000000000, UL) 90 # define __VMEMMAP_BASE _AC(0xffd4000000000000, UL) 91 # define LDT_PGD_ENTRY _AC(-112, UL) 92 # define LDT_BASE_ADDR (LDT_PGD_ENTRY << PGDIR_SHIFT) 93 #else 94 # define VMALLOC_SIZE_TB _AC(32, UL) 95 # define __VMALLOC_BASE _AC(0xffffc90000000000, UL) 96 # define __VMEMMAP_BASE _AC(0xffffea0000000000, UL) 97 # define LDT_PGD_ENTRY _AC(-3, UL) 98 # define LDT_BASE_ADDR (LDT_PGD_ENTRY << PGDIR_SHIFT) 99 #endif 100 101 #ifdef CONFIG_RANDOMIZE_MEMORY 102 # define VMALLOC_START vmalloc_base 103 # define VMEMMAP_START vmemmap_base 104 #else 105 # define VMALLOC_START __VMALLOC_BASE 106 # define VMEMMAP_START __VMEMMAP_BASE 107 #endif /* CONFIG_RANDOMIZE_MEMORY */ 108 109 #define VMALLOC_END (VMALLOC_START + _AC((VMALLOC_SIZE_TB << 40) - 1, UL)) 110 111 #define MODULES_VADDR (__START_KERNEL_map + KERNEL_IMAGE_SIZE) 112 /* The module sections ends with the start of the fixmap */ 113 #define MODULES_END _AC(0xffffffffff000000, UL) 114 #define MODULES_LEN (MODULES_END - MODULES_VADDR) 115 116 #define ESPFIX_PGD_ENTRY _AC(-2, UL) 117 #define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << P4D_SHIFT) 118 119 #define CPU_ENTRY_AREA_PGD _AC(-4, UL) 120 #define CPU_ENTRY_AREA_BASE (CPU_ENTRY_AREA_PGD << P4D_SHIFT) 121 122 #define EFI_VA_START ( -4 * (_AC(1, UL) << 30)) 123 #define EFI_VA_END (-68 * (_AC(1, UL) << 30)) 124 125 #define EARLY_DYNAMIC_PAGE_TABLES 64 126 127 #endif /* _ASM_X86_PGTABLE_64_DEFS_H */ 128