| 1 | /* SPDX-License-Identifier: GPL-2.0 */ | 
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| 2 | #ifndef _ASM_X86_PGTABLE_DEFS_H | 
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| 3 | #define _ASM_X86_PGTABLE_DEFS_H | 
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| 4 |  | 
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| 5 | #include <linux/const.h> | 
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| 6 | #include <linux/mem_encrypt.h> | 
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| 7 |  | 
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| 8 | #include <asm/page_types.h> | 
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| 9 |  | 
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| 10 | #define _PAGE_BIT_PRESENT	0	/* is present */ | 
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| 11 | #define _PAGE_BIT_RW		1	/* writeable */ | 
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| 12 | #define _PAGE_BIT_USER		2	/* userspace addressable */ | 
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| 13 | #define _PAGE_BIT_PWT		3	/* page write through */ | 
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| 14 | #define _PAGE_BIT_PCD		4	/* page cache disabled */ | 
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| 15 | #define _PAGE_BIT_ACCESSED	5	/* was accessed (raised by CPU) */ | 
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| 16 | #define _PAGE_BIT_DIRTY		6	/* was written to (raised by CPU) */ | 
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| 17 | #define _PAGE_BIT_PSE		7	/* 4 MB (or 2MB) page */ | 
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| 18 | #define _PAGE_BIT_PAT		7	/* on 4KB pages */ | 
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| 19 | #define _PAGE_BIT_GLOBAL	8	/* Global TLB entry PPro+ */ | 
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| 20 | #define _PAGE_BIT_SOFTW1	9	/* available for programmer */ | 
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| 21 | #define _PAGE_BIT_SOFTW2	10	/* " */ | 
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| 22 | #define _PAGE_BIT_SOFTW3	11	/* " */ | 
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| 23 | #define _PAGE_BIT_PAT_LARGE	12	/* On 2MB or 1GB pages */ | 
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| 24 | #define _PAGE_BIT_SOFTW4	57	/* available for programmer */ | 
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| 25 | #define _PAGE_BIT_SOFTW5	58	/* available for programmer */ | 
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| 26 | #define _PAGE_BIT_PKEY_BIT0	59	/* Protection Keys, bit 1/4 */ | 
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| 27 | #define _PAGE_BIT_PKEY_BIT1	60	/* Protection Keys, bit 2/4 */ | 
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| 28 | #define _PAGE_BIT_PKEY_BIT2	61	/* Protection Keys, bit 3/4 */ | 
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| 29 | #define _PAGE_BIT_PKEY_BIT3	62	/* Protection Keys, bit 4/4 */ | 
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| 30 | #define _PAGE_BIT_NX		63	/* No execute: only valid after cpuid check */ | 
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| 31 |  | 
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| 32 | #define _PAGE_BIT_SPECIAL	_PAGE_BIT_SOFTW1 | 
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| 33 | #define _PAGE_BIT_CPA_TEST	_PAGE_BIT_SOFTW1 | 
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| 34 | #define _PAGE_BIT_UFFD_WP	_PAGE_BIT_SOFTW2 /* userfaultfd wrprotected */ | 
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| 35 | #define _PAGE_BIT_SOFT_DIRTY	_PAGE_BIT_SOFTW3 /* software dirty tracking */ | 
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| 36 | #define _PAGE_BIT_KERNEL_4K	_PAGE_BIT_SOFTW3 /* page must not be converted to large */ | 
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| 37 |  | 
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| 38 | #ifdef CONFIG_X86_64 | 
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| 39 | #define _PAGE_BIT_SAVED_DIRTY	_PAGE_BIT_SOFTW5 /* Saved Dirty bit (leaf) */ | 
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| 40 | #define _PAGE_BIT_NOPTISHADOW	_PAGE_BIT_SOFTW5 /* No PTI shadow (root PGD) */ | 
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| 41 | #else | 
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| 42 | /* Shared with _PAGE_BIT_UFFD_WP which is not supported on 32 bit */ | 
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| 43 | #define _PAGE_BIT_SAVED_DIRTY	_PAGE_BIT_SOFTW2 /* Saved Dirty bit (leaf) */ | 
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| 44 | #define _PAGE_BIT_NOPTISHADOW	_PAGE_BIT_SOFTW2 /* No PTI shadow (root PGD) */ | 
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| 45 | #endif | 
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| 46 |  | 
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| 47 | /* If _PAGE_BIT_PRESENT is clear, we use these: */ | 
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| 48 | /* - if the user mapped it with PROT_NONE; pte_present gives true */ | 
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| 49 | #define _PAGE_BIT_PROTNONE	_PAGE_BIT_GLOBAL | 
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| 50 |  | 
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| 51 | #define _PAGE_PRESENT	(_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) | 
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| 52 | #define _PAGE_RW	(_AT(pteval_t, 1) << _PAGE_BIT_RW) | 
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| 53 | #define _PAGE_USER	(_AT(pteval_t, 1) << _PAGE_BIT_USER) | 
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| 54 | #define _PAGE_PWT	(_AT(pteval_t, 1) << _PAGE_BIT_PWT) | 
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| 55 | #define _PAGE_PCD	(_AT(pteval_t, 1) << _PAGE_BIT_PCD) | 
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| 56 | #define _PAGE_ACCESSED	(_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) | 
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| 57 | #define _PAGE_DIRTY	(_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) | 
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| 58 | #define _PAGE_PSE	(_AT(pteval_t, 1) << _PAGE_BIT_PSE) | 
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| 59 | #define _PAGE_GLOBAL	(_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) | 
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| 60 | #define _PAGE_SOFTW1	(_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1) | 
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| 61 | #define _PAGE_SOFTW2	(_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2) | 
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| 62 | #define _PAGE_SOFTW3	(_AT(pteval_t, 1) << _PAGE_BIT_SOFTW3) | 
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| 63 | #define _PAGE_PAT	(_AT(pteval_t, 1) << _PAGE_BIT_PAT) | 
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| 64 | #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) | 
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| 65 | #define _PAGE_SPECIAL	(_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) | 
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| 66 | #define _PAGE_CPA_TEST	(_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) | 
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| 67 | #define _PAGE_KERNEL_4K	(_AT(pteval_t, 1) << _PAGE_BIT_KERNEL_4K) | 
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| 68 | #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS | 
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| 69 | #define _PAGE_PKEY_BIT0	(_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0) | 
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| 70 | #define _PAGE_PKEY_BIT1	(_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1) | 
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| 71 | #define _PAGE_PKEY_BIT2	(_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2) | 
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| 72 | #define _PAGE_PKEY_BIT3	(_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3) | 
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| 73 | #else | 
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| 74 | #define _PAGE_PKEY_BIT0	(_AT(pteval_t, 0)) | 
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| 75 | #define _PAGE_PKEY_BIT1	(_AT(pteval_t, 0)) | 
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| 76 | #define _PAGE_PKEY_BIT2	(_AT(pteval_t, 0)) | 
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| 77 | #define _PAGE_PKEY_BIT3	(_AT(pteval_t, 0)) | 
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| 78 | #endif | 
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| 79 |  | 
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| 80 | #define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \ | 
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| 81 | _PAGE_PKEY_BIT1 | \ | 
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| 82 | _PAGE_PKEY_BIT2 | \ | 
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| 83 | _PAGE_PKEY_BIT3) | 
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| 84 |  | 
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| 85 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | 
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| 86 | #define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED) | 
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| 87 | #else | 
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| 88 | #define _PAGE_KNL_ERRATUM_MASK 0 | 
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| 89 | #endif | 
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| 90 |  | 
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| 91 | #ifdef CONFIG_MEM_SOFT_DIRTY | 
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| 92 | #define _PAGE_SOFT_DIRTY	(_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY) | 
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| 93 | #else | 
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| 94 | #define _PAGE_SOFT_DIRTY	(_AT(pteval_t, 0)) | 
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| 95 | #endif | 
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| 96 |  | 
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| 97 | /* | 
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| 98 | * Tracking soft dirty bit when a page goes to a swap is tricky. | 
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| 99 | * We need a bit which can be stored in pte _and_ not conflict | 
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| 100 | * with swap entry format. On x86 bits 1-4 are *not* involved | 
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| 101 | * into swap entry computation, but bit 7 is used for thp migration, | 
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| 102 | * so we borrow bit 1 for soft dirty tracking. | 
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| 103 | * | 
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| 104 | * Please note that this bit must be treated as swap dirty page | 
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| 105 | * mark if and only if the PTE/PMD has present bit clear! | 
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| 106 | */ | 
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| 107 | #ifdef CONFIG_MEM_SOFT_DIRTY | 
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| 108 | #define _PAGE_SWP_SOFT_DIRTY	_PAGE_RW | 
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| 109 | #else | 
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| 110 | #define _PAGE_SWP_SOFT_DIRTY	(_AT(pteval_t, 0)) | 
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| 111 | #endif | 
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| 112 |  | 
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| 113 | #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP | 
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| 114 | #define _PAGE_UFFD_WP		(_AT(pteval_t, 1) << _PAGE_BIT_UFFD_WP) | 
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| 115 | #define _PAGE_SWP_UFFD_WP	_PAGE_USER | 
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| 116 | #else | 
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| 117 | #define _PAGE_UFFD_WP		(_AT(pteval_t, 0)) | 
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| 118 | #define _PAGE_SWP_UFFD_WP	(_AT(pteval_t, 0)) | 
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| 119 | #endif | 
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| 120 |  | 
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| 121 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | 
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| 122 | #define _PAGE_NX	(_AT(pteval_t, 1) << _PAGE_BIT_NX) | 
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| 123 | #define _PAGE_SOFTW4	(_AT(pteval_t, 1) << _PAGE_BIT_SOFTW4) | 
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| 124 | #else | 
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| 125 | #define _PAGE_NX	(_AT(pteval_t, 0)) | 
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| 126 | #define _PAGE_SOFTW4	(_AT(pteval_t, 0)) | 
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| 127 | #endif | 
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| 128 |  | 
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| 129 | /* | 
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| 130 | * The hardware requires shadow stack to be Write=0,Dirty=1. However, | 
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| 131 | * there are valid cases where the kernel might create read-only PTEs that | 
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| 132 | * are dirty (e.g., fork(), mprotect(), uffd-wp(), soft-dirty tracking). In | 
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| 133 | * this case, the _PAGE_SAVED_DIRTY bit is used instead of the HW-dirty bit, | 
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| 134 | * to avoid creating a wrong "shadow stack" PTEs. Such PTEs have | 
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| 135 | * (Write=0,SavedDirty=1,Dirty=0) set. | 
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| 136 | */ | 
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| 137 | #define _PAGE_SAVED_DIRTY	(_AT(pteval_t, 1) << _PAGE_BIT_SAVED_DIRTY) | 
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| 138 |  | 
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| 139 | #define _PAGE_DIRTY_BITS (_PAGE_DIRTY | _PAGE_SAVED_DIRTY) | 
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| 140 |  | 
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| 141 | #define _PAGE_PROTNONE	(_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) | 
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| 142 |  | 
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| 143 | #define _PAGE_NOPTISHADOW (_AT(pteval_t, 1) << _PAGE_BIT_NOPTISHADOW) | 
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| 144 |  | 
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| 145 | /* | 
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| 146 | * Set of bits not changed in pte_modify.  The pte's | 
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| 147 | * protection key is treated like _PAGE_RW, for | 
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| 148 | * instance, and is *not* included in this mask since | 
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| 149 | * pte_modify() does modify it. | 
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| 150 | */ | 
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| 151 | #define _COMMON_PAGE_CHG_MASK	(PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT |	\ | 
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| 152 | _PAGE_SPECIAL | _PAGE_ACCESSED |	\ | 
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| 153 | _PAGE_DIRTY_BITS | _PAGE_SOFT_DIRTY |	\ | 
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| 154 | _PAGE_CC | _PAGE_UFFD_WP) | 
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| 155 | #define _PAGE_CHG_MASK	(_COMMON_PAGE_CHG_MASK | _PAGE_PAT) | 
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| 156 | #define _HPAGE_CHG_MASK (_COMMON_PAGE_CHG_MASK | _PAGE_PSE | _PAGE_PAT_LARGE) | 
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| 157 |  | 
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| 158 | /* | 
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| 159 | * The cache modes defined here are used to translate between pure SW usage | 
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| 160 | * and the HW defined cache mode bits and/or PAT entries. | 
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| 161 | * | 
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| 162 | * The resulting bits for PWT, PCD and PAT should be chosen in a way | 
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| 163 | * to have the WB mode at index 0 (all bits clear). This is the default | 
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| 164 | * right now and likely would break too much if changed. | 
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| 165 | */ | 
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| 166 | #ifndef __ASSEMBLER__ | 
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| 167 | enum page_cache_mode { | 
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| 168 | _PAGE_CACHE_MODE_WB       = 0, | 
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| 169 | _PAGE_CACHE_MODE_WC       = 1, | 
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| 170 | _PAGE_CACHE_MODE_UC_MINUS = 2, | 
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| 171 | _PAGE_CACHE_MODE_UC       = 3, | 
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| 172 | _PAGE_CACHE_MODE_WT       = 4, | 
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| 173 | _PAGE_CACHE_MODE_WP       = 5, | 
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| 174 |  | 
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| 175 | _PAGE_CACHE_MODE_NUM      = 8 | 
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| 176 | }; | 
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| 177 | #endif | 
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| 178 |  | 
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| 179 | #define _PAGE_CC		(_AT(pteval_t, cc_get_mask())) | 
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| 180 | #define _PAGE_ENC		(_AT(pteval_t, sme_me_mask)) | 
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| 181 |  | 
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| 182 | #define _PAGE_CACHE_MASK	(_PAGE_PWT | _PAGE_PCD | _PAGE_PAT) | 
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| 183 | #define _PAGE_LARGE_CACHE_MASK	(_PAGE_PWT | _PAGE_PCD | _PAGE_PAT_LARGE) | 
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| 184 |  | 
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| 185 | #define _PAGE_NOCACHE		(cachemode2protval(_PAGE_CACHE_MODE_UC)) | 
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| 186 | #define _PAGE_CACHE_WP		(cachemode2protval(_PAGE_CACHE_MODE_WP)) | 
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| 187 |  | 
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| 188 | #define __PP _PAGE_PRESENT | 
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| 189 | #define __RW _PAGE_RW | 
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| 190 | #define _USR _PAGE_USER | 
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| 191 | #define ___A _PAGE_ACCESSED | 
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| 192 | #define ___D _PAGE_DIRTY | 
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| 193 | #define ___G _PAGE_GLOBAL | 
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| 194 | #define __NX _PAGE_NX | 
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| 195 |  | 
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| 196 | #define _ENC _PAGE_ENC | 
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| 197 | #define __WP _PAGE_CACHE_WP | 
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| 198 | #define __NC _PAGE_NOCACHE | 
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| 199 | #define _PSE _PAGE_PSE | 
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| 200 |  | 
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| 201 | #define pgprot_val(x)		((x).pgprot) | 
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| 202 | #define __pgprot(x)		((pgprot_t) { (x) } ) | 
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| 203 | #define __pg(x)			__pgprot(x) | 
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| 204 |  | 
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| 205 | #define PAGE_NONE	     __pg(   0|   0|   0|___A|   0|   0|   0|___G) | 
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| 206 | #define PAGE_SHARED	     __pg(__PP|__RW|_USR|___A|__NX|   0|   0|   0) | 
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| 207 | #define PAGE_SHARED_EXEC     __pg(__PP|__RW|_USR|___A|   0|   0|   0|   0) | 
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| 208 | #define PAGE_COPY_NOEXEC     __pg(__PP|   0|_USR|___A|__NX|   0|   0|   0) | 
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| 209 | #define PAGE_COPY_EXEC	     __pg(__PP|   0|_USR|___A|   0|   0|   0|   0) | 
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| 210 | #define PAGE_COPY	     __pg(__PP|   0|_USR|___A|__NX|   0|   0|   0) | 
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| 211 | #define PAGE_READONLY	     __pg(__PP|   0|_USR|___A|__NX|   0|   0|   0) | 
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| 212 | #define PAGE_READONLY_EXEC   __pg(__PP|   0|_USR|___A|   0|   0|   0|   0) | 
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| 213 |  | 
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| 214 | /* | 
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| 215 | * Page tables needs to have Write=1 in order for any lower PTEs to be | 
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| 216 | * writable. This includes shadow stack memory (Write=0, Dirty=1) | 
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| 217 | */ | 
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| 218 | #define _KERNPG_TABLE_NOENC	 (__PP|__RW|   0|___A|   0|___D|   0|   0) | 
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| 219 | #define _KERNPG_TABLE		 (__PP|__RW|   0|___A|   0|___D|   0|   0| _ENC) | 
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| 220 | #define _PAGE_TABLE_NOENC	 (__PP|__RW|_USR|___A|   0|___D|   0|   0) | 
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| 221 | #define _PAGE_TABLE		 (__PP|__RW|_USR|___A|   0|___D|   0|   0| _ENC) | 
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| 222 |  | 
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| 223 | #define __PAGE_KERNEL_RO	 (__PP|   0|   0|___A|__NX|   0|   0|___G) | 
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| 224 | #define __PAGE_KERNEL_ROX	 (__PP|   0|   0|___A|   0|   0|   0|___G) | 
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| 225 | #define __PAGE_KERNEL		 (__PP|__RW|   0|___A|__NX|___D|   0|___G) | 
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| 226 | #define __PAGE_KERNEL_EXEC	 (__PP|__RW|   0|___A|   0|___D|   0|___G) | 
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| 227 | #define __PAGE_KERNEL_NOCACHE	 (__PP|__RW|   0|___A|__NX|___D|   0|___G| __NC) | 
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| 228 | #define __PAGE_KERNEL_VVAR	 (__PP|   0|_USR|___A|__NX|   0|   0|___G) | 
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| 229 | #define __PAGE_KERNEL_LARGE	 (__PP|__RW|   0|___A|__NX|___D|_PSE|___G) | 
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| 230 | #define __PAGE_KERNEL_LARGE_EXEC (__PP|__RW|   0|___A|   0|___D|_PSE|___G) | 
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| 231 | #define __PAGE_KERNEL_WP	 (__PP|__RW|   0|___A|__NX|___D|   0|___G| __WP) | 
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| 232 |  | 
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| 233 |  | 
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| 234 | #define __PAGE_KERNEL_IO		__PAGE_KERNEL | 
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| 235 | #define __PAGE_KERNEL_IO_NOCACHE	__PAGE_KERNEL_NOCACHE | 
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| 236 |  | 
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| 237 |  | 
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| 238 | #ifndef __ASSEMBLER__ | 
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| 239 |  | 
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| 240 | #define __PAGE_KERNEL_ENC	(__PAGE_KERNEL    | _ENC) | 
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| 241 | #define __PAGE_KERNEL_ENC_WP	(__PAGE_KERNEL_WP | _ENC) | 
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| 242 | #define __PAGE_KERNEL_NOENC	(__PAGE_KERNEL    |    0) | 
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| 243 | #define __PAGE_KERNEL_NOENC_WP	(__PAGE_KERNEL_WP |    0) | 
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| 244 |  | 
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| 245 | #define __pgprot_mask(x)	__pgprot((x) & __default_kernel_pte_mask) | 
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| 246 |  | 
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| 247 | #define PAGE_KERNEL		__pgprot_mask(__PAGE_KERNEL            | _ENC) | 
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| 248 | #define PAGE_KERNEL_NOENC	__pgprot_mask(__PAGE_KERNEL            |    0) | 
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| 249 | #define PAGE_KERNEL_RO		__pgprot_mask(__PAGE_KERNEL_RO         | _ENC) | 
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| 250 | #define PAGE_KERNEL_EXEC	__pgprot_mask(__PAGE_KERNEL_EXEC       | _ENC) | 
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| 251 | #define PAGE_KERNEL_EXEC_NOENC	__pgprot_mask(__PAGE_KERNEL_EXEC       |    0) | 
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| 252 | #define PAGE_KERNEL_ROX		__pgprot_mask(__PAGE_KERNEL_ROX        | _ENC) | 
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| 253 | #define PAGE_KERNEL_NOCACHE	__pgprot_mask(__PAGE_KERNEL_NOCACHE    | _ENC) | 
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| 254 | #define PAGE_KERNEL_LARGE	__pgprot_mask(__PAGE_KERNEL_LARGE      | _ENC) | 
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| 255 | #define PAGE_KERNEL_LARGE_EXEC	__pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC) | 
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| 256 | #define PAGE_KERNEL_VVAR	__pgprot_mask(__PAGE_KERNEL_VVAR       | _ENC) | 
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| 257 |  | 
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| 258 | #define PAGE_KERNEL_IO		__pgprot_mask(__PAGE_KERNEL_IO) | 
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| 259 | #define PAGE_KERNEL_IO_NOCACHE	__pgprot_mask(__PAGE_KERNEL_IO_NOCACHE) | 
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| 260 |  | 
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| 261 | #endif	/* __ASSEMBLER__ */ | 
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| 262 |  | 
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| 263 | /* | 
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| 264 | * early identity mapping  pte attrib macros. | 
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| 265 | */ | 
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| 266 | #ifdef CONFIG_X86_64 | 
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| 267 | #define __PAGE_KERNEL_IDENT_LARGE_EXEC	__PAGE_KERNEL_LARGE_EXEC | 
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| 268 | #else | 
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| 269 | #define PTE_IDENT_ATTR	 0x003		/* PRESENT+RW */ | 
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| 270 | #define PDE_IDENT_ATTR	 0x063		/* PRESENT+RW+DIRTY+ACCESSED */ | 
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| 271 | #define PGD_IDENT_ATTR	 0x001		/* PRESENT (no other attributes) */ | 
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| 272 | #endif | 
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| 273 |  | 
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| 274 | #ifdef CONFIG_X86_32 | 
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| 275 | # include <asm/pgtable_32_types.h> | 
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| 276 | #else | 
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| 277 | # include <asm/pgtable_64_types.h> | 
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| 278 | #endif | 
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| 279 |  | 
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| 280 | #ifndef __ASSEMBLER__ | 
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| 281 |  | 
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| 282 | #include <linux/types.h> | 
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| 283 |  | 
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| 284 | /* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */ | 
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| 285 | #define PTE_PFN_MASK		((pteval_t)PHYSICAL_PAGE_MASK) | 
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| 286 |  | 
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| 287 | /* | 
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| 288 | *  Extracts the flags from a (pte|pmd|pud|pgd)val_t | 
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| 289 | *  This includes the protection key value. | 
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| 290 | */ | 
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| 291 | #define PTE_FLAGS_MASK		(~PTE_PFN_MASK) | 
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| 292 |  | 
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| 293 | typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; | 
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| 294 |  | 
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| 295 | typedef struct { pgdval_t pgd; } pgd_t; | 
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| 296 |  | 
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| 297 | static inline pgprot_t pgprot_nx(pgprot_t prot) | 
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| 298 | { | 
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| 299 | return __pgprot(pgprot_val(prot) | _PAGE_NX); | 
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| 300 | } | 
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| 301 | #define pgprot_nx pgprot_nx | 
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| 302 |  | 
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| 303 | #ifdef CONFIG_X86_PAE | 
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| 304 |  | 
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| 305 | /* | 
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| 306 | * PHYSICAL_PAGE_MASK might be non-constant when SME is compiled in, so we can't | 
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| 307 | * use it here. | 
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| 308 | */ | 
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| 309 |  | 
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| 310 | #define PGD_PAE_PAGE_MASK	((signed long)PAGE_MASK) | 
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| 311 | #define PGD_PAE_PHYS_MASK	(((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK) | 
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| 312 |  | 
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| 313 | /* | 
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| 314 | * PAE allows Base Address, P, PWT, PCD and AVL bits to be set in PGD entries. | 
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| 315 | * All other bits are Reserved MBZ | 
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| 316 | */ | 
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| 317 | #define PGD_ALLOWED_BITS	(PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \ | 
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| 318 | _PAGE_PWT | _PAGE_PCD | \ | 
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| 319 | _PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3) | 
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| 320 |  | 
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| 321 | #else | 
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| 322 | /* No need to mask any bits for !PAE */ | 
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| 323 | #define PGD_ALLOWED_BITS	(~0ULL) | 
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| 324 | #endif | 
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| 325 |  | 
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| 326 | static inline pgd_t native_make_pgd(pgdval_t val) | 
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| 327 | { | 
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| 328 | return (pgd_t) { val & PGD_ALLOWED_BITS }; | 
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| 329 | } | 
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| 330 |  | 
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| 331 | static inline pgdval_t native_pgd_val(pgd_t pgd) | 
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| 332 | { | 
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| 333 | return pgd.pgd & PGD_ALLOWED_BITS; | 
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| 334 | } | 
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| 335 |  | 
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| 336 | static inline pgdval_t pgd_flags(pgd_t pgd) | 
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| 337 | { | 
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| 338 | return native_pgd_val(pgd) & PTE_FLAGS_MASK; | 
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| 339 | } | 
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| 340 |  | 
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| 341 | #if CONFIG_PGTABLE_LEVELS > 4 | 
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| 342 | typedef struct { p4dval_t p4d; } p4d_t; | 
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| 343 |  | 
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| 344 | static inline p4d_t native_make_p4d(pudval_t val) | 
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| 345 | { | 
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| 346 | return (p4d_t) { val }; | 
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| 347 | } | 
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| 348 |  | 
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| 349 | static inline p4dval_t native_p4d_val(p4d_t p4d) | 
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| 350 | { | 
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| 351 | return p4d.p4d; | 
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| 352 | } | 
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| 353 | #else | 
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| 354 | #include <asm-generic/pgtable-nop4d.h> | 
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| 355 |  | 
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| 356 | static inline p4d_t native_make_p4d(pudval_t val) | 
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| 357 | { | 
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| 358 | return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) }; | 
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| 359 | } | 
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| 360 |  | 
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| 361 | static inline p4dval_t native_p4d_val(p4d_t p4d) | 
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| 362 | { | 
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| 363 | return native_pgd_val(p4d.pgd); | 
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| 364 | } | 
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| 365 | #endif | 
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| 366 |  | 
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| 367 | #if CONFIG_PGTABLE_LEVELS > 3 | 
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| 368 | typedef struct { pudval_t pud; } pud_t; | 
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| 369 |  | 
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| 370 | static inline pud_t native_make_pud(pmdval_t val) | 
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| 371 | { | 
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| 372 | return (pud_t) { val }; | 
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| 373 | } | 
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| 374 |  | 
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| 375 | static inline pudval_t native_pud_val(pud_t pud) | 
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| 376 | { | 
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| 377 | return pud.pud; | 
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| 378 | } | 
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| 379 | #else | 
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| 380 | #include <asm-generic/pgtable-nopud.h> | 
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| 381 |  | 
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| 382 | static inline pud_t native_make_pud(pudval_t val) | 
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| 383 | { | 
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| 384 | return (pud_t) { .p4d.pgd = native_make_pgd(val) }; | 
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| 385 | } | 
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| 386 |  | 
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| 387 | static inline pudval_t native_pud_val(pud_t pud) | 
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| 388 | { | 
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| 389 | return native_pgd_val(pud.p4d.pgd); | 
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| 390 | } | 
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| 391 | #endif | 
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| 392 |  | 
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| 393 | #if CONFIG_PGTABLE_LEVELS > 2 | 
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| 394 | static inline pmd_t native_make_pmd(pmdval_t val) | 
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| 395 | { | 
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| 396 | return (pmd_t) { .pmd = val }; | 
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| 397 | } | 
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| 398 |  | 
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| 399 | static inline pmdval_t native_pmd_val(pmd_t pmd) | 
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| 400 | { | 
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| 401 | return pmd.pmd; | 
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| 402 | } | 
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| 403 | #else | 
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| 404 | #include <asm-generic/pgtable-nopmd.h> | 
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| 405 |  | 
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| 406 | static inline pmd_t native_make_pmd(pmdval_t val) | 
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| 407 | { | 
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| 408 | return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) }; | 
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| 409 | } | 
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| 410 |  | 
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| 411 | static inline pmdval_t native_pmd_val(pmd_t pmd) | 
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| 412 | { | 
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| 413 | return native_pgd_val(pmd.pud.p4d.pgd); | 
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| 414 | } | 
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| 415 | #endif | 
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| 416 |  | 
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| 417 | static inline p4dval_t p4d_pfn_mask(p4d_t p4d) | 
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| 418 | { | 
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| 419 | /* No 512 GiB huge pages yet */ | 
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| 420 | return PTE_PFN_MASK; | 
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| 421 | } | 
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| 422 |  | 
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| 423 | static inline p4dval_t p4d_flags_mask(p4d_t p4d) | 
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| 424 | { | 
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| 425 | return ~p4d_pfn_mask(p4d); | 
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| 426 | } | 
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| 427 |  | 
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| 428 | static inline p4dval_t p4d_flags(p4d_t p4d) | 
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| 429 | { | 
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| 430 | return native_p4d_val(p4d) & p4d_flags_mask(p4d); | 
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| 431 | } | 
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| 432 |  | 
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| 433 | static inline pudval_t pud_pfn_mask(pud_t pud) | 
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| 434 | { | 
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| 435 | if (native_pud_val(pud) & _PAGE_PSE) | 
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| 436 | return PHYSICAL_PUD_PAGE_MASK; | 
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| 437 | else | 
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| 438 | return PTE_PFN_MASK; | 
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| 439 | } | 
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| 440 |  | 
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| 441 | static inline pudval_t pud_flags_mask(pud_t pud) | 
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| 442 | { | 
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| 443 | return ~pud_pfn_mask(pud); | 
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| 444 | } | 
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| 445 |  | 
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| 446 | static inline pudval_t pud_flags(pud_t pud) | 
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| 447 | { | 
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| 448 | return native_pud_val(pud) & pud_flags_mask(pud); | 
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| 449 | } | 
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| 450 |  | 
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| 451 | static inline pmdval_t pmd_pfn_mask(pmd_t pmd) | 
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| 452 | { | 
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| 453 | if (native_pmd_val(pmd) & _PAGE_PSE) | 
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| 454 | return PHYSICAL_PMD_PAGE_MASK; | 
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| 455 | else | 
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| 456 | return PTE_PFN_MASK; | 
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| 457 | } | 
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| 458 |  | 
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| 459 | static inline pmdval_t pmd_flags_mask(pmd_t pmd) | 
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| 460 | { | 
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| 461 | return ~pmd_pfn_mask(pmd); | 
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| 462 | } | 
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| 463 |  | 
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| 464 | static inline pmdval_t pmd_flags(pmd_t pmd) | 
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| 465 | { | 
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| 466 | return native_pmd_val(pmd) & pmd_flags_mask(pmd); | 
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| 467 | } | 
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| 468 |  | 
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| 469 | static inline pte_t native_make_pte(pteval_t val) | 
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| 470 | { | 
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| 471 | return (pte_t) { .pte = val }; | 
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| 472 | } | 
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| 473 |  | 
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| 474 | static inline pteval_t native_pte_val(pte_t pte) | 
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| 475 | { | 
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| 476 | return pte.pte; | 
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| 477 | } | 
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| 478 |  | 
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| 479 | static inline pteval_t pte_flags(pte_t pte) | 
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| 480 | { | 
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| 481 | return native_pte_val(pte) & PTE_FLAGS_MASK; | 
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| 482 | } | 
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| 483 |  | 
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| 484 | #define __pte2cm_idx(cb)				\ | 
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| 485 | ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) |		\ | 
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| 486 | (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) |		\ | 
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| 487 | (((cb) >> _PAGE_BIT_PWT) & 1)) | 
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| 488 | #define __cm_idx2pte(i)					\ | 
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| 489 | ((((i) & 4) << (_PAGE_BIT_PAT - 2)) |		\ | 
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| 490 | (((i) & 2) << (_PAGE_BIT_PCD - 1)) |		\ | 
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| 491 | (((i) & 1) << _PAGE_BIT_PWT)) | 
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| 492 |  | 
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| 493 | unsigned long cachemode2protval(enum page_cache_mode pcm); | 
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| 494 |  | 
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| 495 | static inline pgprotval_t protval_4k_2_large(pgprotval_t val) | 
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| 496 | { | 
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| 497 | return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) | | 
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| 498 | ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT)); | 
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| 499 | } | 
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| 500 | static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot) | 
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| 501 | { | 
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| 502 | return __pgprot(protval_4k_2_large(pgprot_val(pgprot))); | 
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| 503 | } | 
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| 504 | static inline pgprotval_t protval_large_2_4k(pgprotval_t val) | 
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| 505 | { | 
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| 506 | return (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) | | 
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| 507 | ((val & _PAGE_PAT_LARGE) >> | 
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| 508 | (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT)); | 
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| 509 | } | 
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| 510 | static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot) | 
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| 511 | { | 
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| 512 | return __pgprot(protval_large_2_4k(pgprot_val(pgprot))); | 
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| 513 | } | 
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| 514 |  | 
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| 515 |  | 
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| 516 | typedef struct page *pgtable_t; | 
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| 517 |  | 
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| 518 | extern pteval_t __supported_pte_mask; | 
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| 519 | extern pteval_t __default_kernel_pte_mask; | 
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| 520 |  | 
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| 521 | #define pgprot_writecombine	pgprot_writecombine | 
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| 522 | extern pgprot_t pgprot_writecombine(pgprot_t prot); | 
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| 523 |  | 
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| 524 | #define pgprot_writethrough	pgprot_writethrough | 
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| 525 | extern pgprot_t pgprot_writethrough(pgprot_t prot); | 
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| 526 |  | 
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| 527 | /* Indicate that x86 has its own track and untrack pfn vma functions */ | 
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| 528 | #define __HAVE_PFNMAP_TRACKING | 
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| 529 |  | 
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| 530 | #define __HAVE_PHYS_MEM_ACCESS_PROT | 
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| 531 | struct file; | 
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| 532 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | 
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| 533 | unsigned long size, pgprot_t vma_prot); | 
|---|
| 534 |  | 
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| 535 | /* Install a pte for a particular vaddr in kernel space. */ | 
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| 536 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); | 
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| 537 |  | 
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| 538 | #ifdef CONFIG_X86_32 | 
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| 539 | extern void native_pagetable_init(void); | 
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| 540 | #else | 
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| 541 | #define native_pagetable_init        paging_init | 
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| 542 | #endif | 
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| 543 |  | 
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| 544 | enum pg_level { | 
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| 545 | PG_LEVEL_NONE, | 
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| 546 | PG_LEVEL_4K, | 
|---|
| 547 | PG_LEVEL_2M, | 
|---|
| 548 | PG_LEVEL_1G, | 
|---|
| 549 | PG_LEVEL_512G, | 
|---|
| 550 | PG_LEVEL_256T, | 
|---|
| 551 | PG_LEVEL_NUM | 
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| 552 | }; | 
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| 553 |  | 
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| 554 | #ifdef CONFIG_PROC_FS | 
|---|
| 555 | extern void update_page_count(int level, unsigned long pages); | 
|---|
| 556 | #else | 
|---|
| 557 | static inline void update_page_count(int level, unsigned long pages) { } | 
|---|
| 558 | #endif | 
|---|
| 559 |  | 
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| 560 | /* | 
|---|
| 561 | * Helper function that returns the kernel pagetable entry controlling | 
|---|
| 562 | * the virtual address 'address'. NULL means no pagetable entry present. | 
|---|
| 563 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it | 
|---|
| 564 | * as a pte too. | 
|---|
| 565 | */ | 
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| 566 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); | 
|---|
| 567 | extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address, | 
|---|
| 568 | unsigned int *level); | 
|---|
| 569 | pte_t *lookup_address_in_pgd_attr(pgd_t *pgd, unsigned long address, | 
|---|
| 570 | unsigned int *level, bool *nx, bool *rw); | 
|---|
| 571 | extern pmd_t *lookup_pmd_address(unsigned long address); | 
|---|
| 572 | extern phys_addr_t slow_virt_to_phys(void *__address); | 
|---|
| 573 | extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, | 
|---|
| 574 | unsigned long address, | 
|---|
| 575 | unsigned numpages, | 
|---|
| 576 | unsigned long page_flags); | 
|---|
| 577 | extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address, | 
|---|
| 578 | unsigned long numpages); | 
|---|
| 579 | #endif	/* !__ASSEMBLER__ */ | 
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| 580 |  | 
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| 581 | #endif /* _ASM_X86_PGTABLE_DEFS_H */ | 
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| 582 |  | 
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