arch/x86/include/asm/pgtable_64_types.h

   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 */