| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_PGTABLE_64_DEFS_H |
| #define _ASM_X86_PGTABLE_64_DEFS_H |
| |
| #include <asm/sparsemem.h> |
| |
| #ifndef __ASSEMBLY__ |
| #include <linux/types.h> |
| #include <asm/kaslr.h> |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef unsigned long pteval_t; |
| typedef unsigned long pmdval_t; |
| typedef unsigned long pudval_t; |
| typedef unsigned long p4dval_t; |
| typedef unsigned long pgdval_t; |
| typedef unsigned long pgprotval_t; |
| |
| typedef struct { pteval_t pte; } pte_t; |
| |
| #ifdef CONFIG_X86_5LEVEL |
| extern unsigned int __pgtable_l5_enabled; |
| |
| #ifdef USE_EARLY_PGTABLE_L5 |
| /* |
| * cpu_feature_enabled() is not available in early boot code. |
| * Use variable instead. |
| */ |
| static inline bool pgtable_l5_enabled(void) |
| { |
| return __pgtable_l5_enabled; |
| } |
| #else |
| #define pgtable_l5_enabled() cpu_feature_enabled(X86_FEATURE_LA57) |
| #endif /* USE_EARLY_PGTABLE_L5 */ |
| |
| #else |
| #define pgtable_l5_enabled() 0 |
| #endif /* CONFIG_X86_5LEVEL */ |
| |
| extern unsigned int pgdir_shift; |
| extern unsigned int ptrs_per_p4d; |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #define SHARED_KERNEL_PMD 0 |
| |
| #ifdef CONFIG_X86_5LEVEL |
| |
| /* |
| * PGDIR_SHIFT determines what a top-level page table entry can map |
| */ |
| #define PGDIR_SHIFT pgdir_shift |
| #define PTRS_PER_PGD 512 |
| |
| /* |
| * 4th level page in 5-level paging case |
| */ |
| #define P4D_SHIFT 39 |
| #define MAX_PTRS_PER_P4D 512 |
| #define PTRS_PER_P4D ptrs_per_p4d |
| #define P4D_SIZE (_AC(1, UL) << P4D_SHIFT) |
| #define P4D_MASK (~(P4D_SIZE - 1)) |
| |
| #define MAX_POSSIBLE_PHYSMEM_BITS 52 |
| |
| #else /* CONFIG_X86_5LEVEL */ |
| |
| /* |
| * PGDIR_SHIFT determines what a top-level page table entry can map |
| */ |
| #define PGDIR_SHIFT 39 |
| #define PTRS_PER_PGD 512 |
| #define MAX_PTRS_PER_P4D 1 |
| |
| #endif /* CONFIG_X86_5LEVEL */ |
| |
| /* |
| * 3rd level page |
| */ |
| #define PUD_SHIFT 30 |
| #define PTRS_PER_PUD 512 |
| |
| /* |
| * PMD_SHIFT determines the size of the area a middle-level |
| * page table can map |
| */ |
| #define PMD_SHIFT 21 |
| #define PTRS_PER_PMD 512 |
| |
| /* |
| * entries per page directory level |
| */ |
| #define PTRS_PER_PTE 512 |
| |
| #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) |
| #define PMD_MASK (~(PMD_SIZE - 1)) |
| #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) |
| #define PUD_MASK (~(PUD_SIZE - 1)) |
| #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) |
| #define PGDIR_MASK (~(PGDIR_SIZE - 1)) |
| |
| /* |
| * See Documentation/x86/x86_64/mm.rst for a description of the memory map. |
| * |
| * Be very careful vs. KASLR when changing anything here. The KASLR address |
| * range must not overlap with anything except the KASAN shadow area, which |
| * is correct as KASAN disables KASLR. |
| */ |
| #define MAXMEM (1UL << MAX_PHYSMEM_BITS) |
| |
| #define GUARD_HOLE_PGD_ENTRY -256UL |
| #define GUARD_HOLE_SIZE (16UL << PGDIR_SHIFT) |
| #define GUARD_HOLE_BASE_ADDR (GUARD_HOLE_PGD_ENTRY << PGDIR_SHIFT) |
| #define GUARD_HOLE_END_ADDR (GUARD_HOLE_BASE_ADDR + GUARD_HOLE_SIZE) |
| |
| #define LDT_PGD_ENTRY -240UL |
| #define LDT_BASE_ADDR (LDT_PGD_ENTRY << PGDIR_SHIFT) |
| #define LDT_END_ADDR (LDT_BASE_ADDR + PGDIR_SIZE) |
| |
| #define __VMALLOC_BASE_L4 0xffffc90000000000UL |
| #define __VMALLOC_BASE_L5 0xffa0000000000000UL |
| |
| #define VMALLOC_SIZE_TB_L4 32UL |
| #define VMALLOC_SIZE_TB_L5 12800UL |
| |
| #define __VMEMMAP_BASE_L4 0xffffea0000000000UL |
| #define __VMEMMAP_BASE_L5 0xffd4000000000000UL |
| |
| #ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT |
| # define VMALLOC_START vmalloc_base |
| # define VMALLOC_SIZE_TB (pgtable_l5_enabled() ? VMALLOC_SIZE_TB_L5 : VMALLOC_SIZE_TB_L4) |
| # define VMEMMAP_START vmemmap_base |
| #else |
| # define VMALLOC_START __VMALLOC_BASE_L4 |
| # define VMALLOC_SIZE_TB VMALLOC_SIZE_TB_L4 |
| # define VMEMMAP_START __VMEMMAP_BASE_L4 |
| #endif /* CONFIG_DYNAMIC_MEMORY_LAYOUT */ |
| |
| #define VMALLOC_END (VMALLOC_START + (VMALLOC_SIZE_TB << 40) - 1) |
| |
| #define MODULES_VADDR (__START_KERNEL_map + KERNEL_IMAGE_SIZE) |
| /* The module sections ends with the start of the fixmap */ |
| #define MODULES_END _AC(0xffffffffff000000, UL) |
| #define MODULES_LEN (MODULES_END - MODULES_VADDR) |
| |
| #define ESPFIX_PGD_ENTRY _AC(-2, UL) |
| #define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << P4D_SHIFT) |
| |
| #define CPU_ENTRY_AREA_PGD _AC(-4, UL) |
| #define CPU_ENTRY_AREA_BASE (CPU_ENTRY_AREA_PGD << P4D_SHIFT) |
| |
| #define EFI_VA_START ( -4 * (_AC(1, UL) << 30)) |
| #define EFI_VA_END (-68 * (_AC(1, UL) << 30)) |
| |
| #define EARLY_DYNAMIC_PAGE_TABLES 64 |
| |
| #define PGD_KERNEL_START ((PAGE_SIZE / 2) / sizeof(pgd_t)) |
| |
| #endif /* _ASM_X86_PGTABLE_64_DEFS_H */ |