diff options
Diffstat (limited to 'arch/x86/include/asm/pgtable-3level_types.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable-3level_types.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable-3level_types.h b/arch/x86/include/asm/pgtable-3level_types.h new file mode 100644 index 000000000..56baf43be --- /dev/null +++ b/arch/x86/include/asm/pgtable-3level_types.h @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_PGTABLE_3LEVEL_DEFS_H +#define _ASM_X86_PGTABLE_3LEVEL_DEFS_H + +#ifndef __ASSEMBLY__ +#include <linux/types.h> + +typedef u64 pteval_t; +typedef u64 pmdval_t; +typedef u64 pudval_t; +typedef u64 p4dval_t; +typedef u64 pgdval_t; +typedef u64 pgprotval_t; + +typedef union { + struct { + unsigned long pte_low, pte_high; + }; + pteval_t pte; +} pte_t; +#endif /* !__ASSEMBLY__ */ + +#define SHARED_KERNEL_PMD (!static_cpu_has(X86_FEATURE_PTI)) + +#define ARCH_PAGE_TABLE_SYNC_MASK (SHARED_KERNEL_PMD ? 0 : PGTBL_PMD_MODIFIED) + +/* + * PGDIR_SHIFT determines what a top-level page table entry can map + */ +#define PGDIR_SHIFT 30 +#define PTRS_PER_PGD 4 + +/* + * 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 MAX_POSSIBLE_PHYSMEM_BITS 36 +#define PGD_KERNEL_START (CONFIG_PAGE_OFFSET >> PGDIR_SHIFT) + +#endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */ |