Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 1 | #ifndef _ASM_X86_PGTABLE_DEFS_H |
| 2 | #define _ASM_X86_PGTABLE_DEFS_H |
| 3 | |
| 4 | #include <linux/const.h> |
Ingo Molnar | e43623b | 2009-02-13 13:24:19 +0100 | [diff] [blame] | 5 | #include <asm/page_types.h> |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 6 | |
Kirill A. Shutemov | d016bf7 | 2015-02-11 15:26:41 -0800 | [diff] [blame] | 7 | #define FIRST_USER_ADDRESS 0UL |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 8 | |
| 9 | #define _PAGE_BIT_PRESENT 0 /* is present */ |
| 10 | #define _PAGE_BIT_RW 1 /* writeable */ |
| 11 | #define _PAGE_BIT_USER 2 /* userspace addressable */ |
| 12 | #define _PAGE_BIT_PWT 3 /* page write through */ |
| 13 | #define _PAGE_BIT_PCD 4 /* page cache disabled */ |
| 14 | #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ |
| 15 | #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ |
| 16 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
| 17 | #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
| 18 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
Mel Gorman | c46a7c8 | 2014-06-04 16:06:30 -0700 | [diff] [blame] | 19 | #define _PAGE_BIT_SOFTW1 9 /* available for programmer */ |
| 20 | #define _PAGE_BIT_SOFTW2 10 /* " */ |
| 21 | #define _PAGE_BIT_SOFTW3 11 /* " */ |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 22 | #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
Dave Hansen | 5c1d90f | 2016-02-12 13:02:05 -0800 | [diff] [blame] | 23 | #define _PAGE_BIT_SOFTW4 58 /* available for programmer */ |
| 24 | #define _PAGE_BIT_PKEY_BIT0 59 /* Protection Keys, bit 1/4 */ |
| 25 | #define _PAGE_BIT_PKEY_BIT1 60 /* Protection Keys, bit 2/4 */ |
| 26 | #define _PAGE_BIT_PKEY_BIT2 61 /* Protection Keys, bit 3/4 */ |
| 27 | #define _PAGE_BIT_PKEY_BIT3 62 /* Protection Keys, bit 4/4 */ |
| 28 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| 29 | |
Mel Gorman | c46a7c8 | 2014-06-04 16:06:30 -0700 | [diff] [blame] | 30 | #define _PAGE_BIT_SPECIAL _PAGE_BIT_SOFTW1 |
| 31 | #define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1 |
Mel Gorman | c46a7c8 | 2014-06-04 16:06:30 -0700 | [diff] [blame] | 32 | #define _PAGE_BIT_HIDDEN _PAGE_BIT_SOFTW3 /* hidden by kmemcheck */ |
| 33 | #define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3 /* software dirty tracking */ |
Dave Hansen | 5c1d90f | 2016-02-12 13:02:05 -0800 | [diff] [blame] | 34 | #define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4 |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 35 | |
| 36 | /* If _PAGE_BIT_PRESENT is clear, we use these: */ |
| 37 | /* - if the user mapped it with PROT_NONE; pte_present gives true */ |
| 38 | #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 39 | |
| 40 | #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) |
| 41 | #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) |
| 42 | #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) |
| 43 | #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) |
| 44 | #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) |
| 45 | #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) |
| 46 | #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) |
| 47 | #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) |
Dave Hansen | 8f0baad | 2017-08-30 16:23:00 -0700 | [diff] [blame] | 48 | #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) |
Mel Gorman | c46a7c8 | 2014-06-04 16:06:30 -0700 | [diff] [blame] | 49 | #define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1) |
David Vrabel | f955371 | 2014-01-07 17:03:06 +0000 | [diff] [blame] | 50 | #define _PAGE_SOFTW2 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 51 | #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) |
| 52 | #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) |
| 53 | #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) |
| 54 | #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) |
Dave Hansen | 5c1d90f | 2016-02-12 13:02:05 -0800 | [diff] [blame] | 55 | #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS |
| 56 | #define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0) |
| 57 | #define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1) |
| 58 | #define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2) |
| 59 | #define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3) |
| 60 | #else |
| 61 | #define _PAGE_PKEY_BIT0 (_AT(pteval_t, 0)) |
| 62 | #define _PAGE_PKEY_BIT1 (_AT(pteval_t, 0)) |
| 63 | #define _PAGE_PKEY_BIT2 (_AT(pteval_t, 0)) |
| 64 | #define _PAGE_PKEY_BIT3 (_AT(pteval_t, 0)) |
| 65 | #endif |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 66 | #define __HAVE_ARCH_PTE_SPECIAL |
| 67 | |
Dave Hansen | 019132f | 2016-02-12 13:02:14 -0800 | [diff] [blame] | 68 | #define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \ |
| 69 | _PAGE_PKEY_BIT1 | \ |
| 70 | _PAGE_PKEY_BIT2 | \ |
| 71 | _PAGE_PKEY_BIT3) |
| 72 | |
Dave Hansen | 97e3c60 | 2016-07-07 17:19:12 -0700 | [diff] [blame] | 73 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
| 74 | #define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED) |
| 75 | #else |
| 76 | #define _PAGE_KNL_ERRATUM_MASK 0 |
| 77 | #endif |
| 78 | |
Jeremy Fitzhardinge | 9d31c50 | 2009-02-06 13:05:01 -0800 | [diff] [blame] | 79 | #ifdef CONFIG_KMEMCHECK |
| 80 | #define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN) |
| 81 | #else |
| 82 | #define _PAGE_HIDDEN (_AT(pteval_t, 0)) |
| 83 | #endif |
| 84 | |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 85 | /* |
| 86 | * The same hidden bit is used by kmemcheck, but since kmemcheck |
| 87 | * works on kernel pages while soft-dirty engine on user space, |
| 88 | * they do not conflict with each other. |
| 89 | */ |
| 90 | |
| 91 | #ifdef CONFIG_MEM_SOFT_DIRTY |
Cyrill Gorcunov | 41bb347 | 2013-08-13 16:00:51 -0700 | [diff] [blame] | 92 | #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY) |
Pavel Emelyanov | 0f8975e | 2013-07-03 15:01:20 -0700 | [diff] [blame] | 93 | #else |
| 94 | #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0)) |
| 95 | #endif |
| 96 | |
Cyrill Gorcunov | 179ef71 | 2013-08-13 16:00:49 -0700 | [diff] [blame] | 97 | /* |
| 98 | * Tracking soft dirty bit when a page goes to a swap is tricky. |
| 99 | * We need a bit which can be stored in pte _and_ not conflict |
| 100 | * with swap entry format. On x86 bits 6 and 7 are *not* involved |
| 101 | * into swap entry computation, but bit 6 is used for nonlinear |
| 102 | * file mapping, so we borrow bit 7 for soft dirty tracking. |
Cyrill Gorcunov | fa0f281 | 2013-09-11 14:22:47 -0700 | [diff] [blame] | 103 | * |
| 104 | * Please note that this bit must be treated as swap dirty page |
| 105 | * mark if and only if the PTE has present bit clear! |
Cyrill Gorcunov | 179ef71 | 2013-08-13 16:00:49 -0700 | [diff] [blame] | 106 | */ |
| 107 | #ifdef CONFIG_MEM_SOFT_DIRTY |
| 108 | #define _PAGE_SWP_SOFT_DIRTY _PAGE_PSE |
| 109 | #else |
| 110 | #define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0)) |
| 111 | #endif |
| 112 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 113 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
| 114 | #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) |
Dan Williams | 69660fd | 2016-01-15 16:56:37 -0800 | [diff] [blame] | 115 | #define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP) |
| 116 | #define __HAVE_ARCH_PTE_DEVMAP |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 117 | #else |
| 118 | #define _PAGE_NX (_AT(pteval_t, 0)) |
Dan Williams | 69660fd | 2016-01-15 16:56:37 -0800 | [diff] [blame] | 119 | #define _PAGE_DEVMAP (_AT(pteval_t, 0)) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 120 | #endif |
| 121 | |
Richard Fellner | 13be448 | 2017-05-04 14:26:50 +0200 | [diff] [blame] | 122 | #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 123 | |
| 124 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 125 | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 126 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ |
| 127 | _PAGE_DIRTY) |
| 128 | |
Dave Hansen | 8f62c88 | 2016-02-12 13:02:10 -0800 | [diff] [blame] | 129 | /* |
| 130 | * Set of bits not changed in pte_modify. The pte's |
| 131 | * protection key is treated like _PAGE_RW, for |
| 132 | * instance, and is *not* included in this mask since |
| 133 | * pte_modify() does modify it. |
| 134 | */ |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 135 | #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ |
Andrey Vagin | 24f91eb | 2014-01-30 15:46:10 -0800 | [diff] [blame] | 136 | _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \ |
Mel Gorman | 21d9ee3 | 2015-02-12 14:58:32 -0800 | [diff] [blame] | 137 | _PAGE_SOFT_DIRTY) |
| 138 | #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 139 | |
Hugh Dickins | 2684b12 | 2017-08-30 16:23:00 -0700 | [diff] [blame] | 140 | /* The ASID is the lower 12 bits of CR3 */ |
| 141 | #define X86_CR3_PCID_ASID_MASK (_AC((1<<12)-1,UL)) |
| 142 | |
| 143 | /* Mask for all the PCID-related bits in CR3: */ |
| 144 | #define X86_CR3_PCID_MASK (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_MASK) |
Hugh Dickins | 6a2b4117 | 2017-09-08 19:26:30 -0700 | [diff] [blame] | 145 | #define X86_CR3_PCID_ASID_KERN (_AC(0x0,UL)) |
| 146 | |
Hugh Dickins | 2684b12 | 2017-08-30 16:23:00 -0700 | [diff] [blame] | 147 | #if defined(CONFIG_KAISER) && defined(CONFIG_X86_64) |
Hugh Dickins | 6a2b4117 | 2017-09-08 19:26:30 -0700 | [diff] [blame] | 148 | /* Let X86_CR3_PCID_ASID_USER be usable for the X86_CR3_PCID_NOFLUSH bit */ |
| 149 | #define X86_CR3_PCID_ASID_USER (_AC(0x80,UL)) |
Hugh Dickins | 2684b12 | 2017-08-30 16:23:00 -0700 | [diff] [blame] | 150 | |
| 151 | #define X86_CR3_PCID_KERN_FLUSH (X86_CR3_PCID_ASID_KERN) |
| 152 | #define X86_CR3_PCID_USER_FLUSH (X86_CR3_PCID_ASID_USER) |
| 153 | #define X86_CR3_PCID_KERN_NOFLUSH (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_KERN) |
| 154 | #define X86_CR3_PCID_USER_NOFLUSH (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_USER) |
| 155 | #else |
Hugh Dickins | 2684b12 | 2017-08-30 16:23:00 -0700 | [diff] [blame] | 156 | #define X86_CR3_PCID_ASID_USER (_AC(0x0,UL)) |
| 157 | /* |
| 158 | * PCIDs are unsupported on 32-bit and none of these bits can be |
| 159 | * set in CR3: |
| 160 | */ |
| 161 | #define X86_CR3_PCID_KERN_FLUSH (0) |
| 162 | #define X86_CR3_PCID_USER_FLUSH (0) |
| 163 | #define X86_CR3_PCID_KERN_NOFLUSH (0) |
| 164 | #define X86_CR3_PCID_USER_NOFLUSH (0) |
| 165 | #endif |
| 166 | |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 167 | /* |
| 168 | * The cache modes defined here are used to translate between pure SW usage |
| 169 | * and the HW defined cache mode bits and/or PAT entries. |
| 170 | * |
| 171 | * The resulting bits for PWT, PCD and PAT should be chosen in a way |
| 172 | * to have the WB mode at index 0 (all bits clear). This is the default |
| 173 | * right now and likely would break too much if changed. |
| 174 | */ |
| 175 | #ifndef __ASSEMBLY__ |
| 176 | enum page_cache_mode { |
| 177 | _PAGE_CACHE_MODE_WB = 0, |
| 178 | _PAGE_CACHE_MODE_WC = 1, |
| 179 | _PAGE_CACHE_MODE_UC_MINUS = 2, |
| 180 | _PAGE_CACHE_MODE_UC = 3, |
| 181 | _PAGE_CACHE_MODE_WT = 4, |
| 182 | _PAGE_CACHE_MODE_WP = 5, |
| 183 | _PAGE_CACHE_MODE_NUM = 8 |
| 184 | }; |
| 185 | #endif |
| 186 | |
| 187 | #define _PAGE_CACHE_MASK (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT) |
| 188 | #define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC)) |
| 189 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 190 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
| 191 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 192 | _PAGE_ACCESSED | _PAGE_NX) |
| 193 | |
| 194 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ |
| 195 | _PAGE_USER | _PAGE_ACCESSED) |
| 196 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 197 | _PAGE_ACCESSED | _PAGE_NX) |
| 198 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 199 | _PAGE_ACCESSED) |
| 200 | #define PAGE_COPY PAGE_COPY_NOEXEC |
| 201 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 202 | _PAGE_ACCESSED | _PAGE_NX) |
| 203 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 204 | _PAGE_ACCESSED) |
| 205 | |
| 206 | #define __PAGE_KERNEL_EXEC \ |
| 207 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) |
| 208 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
| 209 | |
| 210 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) |
| 211 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) |
Juergen Gross | 87ad0b7 | 2014-11-03 14:02:00 +0100 | [diff] [blame] | 212 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_NOCACHE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 213 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
Andy Lutomirski | 9fd67b4 | 2011-06-05 13:50:19 -0400 | [diff] [blame] | 214 | #define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 215 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 216 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
| 217 | |
David Vrabel | f955371 | 2014-01-07 17:03:06 +0000 | [diff] [blame] | 218 | #define __PAGE_KERNEL_IO (__PAGE_KERNEL) |
| 219 | #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 220 | |
| 221 | #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) |
| 222 | #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) |
| 223 | #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) |
| 224 | #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 225 | #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 226 | #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 227 | #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) |
| 228 | #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) |
Andy Lutomirski | 9fd67b4 | 2011-06-05 13:50:19 -0400 | [diff] [blame] | 229 | #define PAGE_KERNEL_VVAR __pgprot(__PAGE_KERNEL_VVAR) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 230 | |
| 231 | #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO) |
| 232 | #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE) |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 233 | |
| 234 | /* xwr */ |
| 235 | #define __P000 PAGE_NONE |
| 236 | #define __P001 PAGE_READONLY |
| 237 | #define __P010 PAGE_COPY |
| 238 | #define __P011 PAGE_COPY |
| 239 | #define __P100 PAGE_READONLY_EXEC |
| 240 | #define __P101 PAGE_READONLY_EXEC |
| 241 | #define __P110 PAGE_COPY_EXEC |
| 242 | #define __P111 PAGE_COPY_EXEC |
| 243 | |
| 244 | #define __S000 PAGE_NONE |
| 245 | #define __S001 PAGE_READONLY |
| 246 | #define __S010 PAGE_SHARED |
| 247 | #define __S011 PAGE_SHARED |
| 248 | #define __S100 PAGE_READONLY_EXEC |
| 249 | #define __S101 PAGE_READONLY_EXEC |
| 250 | #define __S110 PAGE_SHARED_EXEC |
| 251 | #define __S111 PAGE_SHARED_EXEC |
| 252 | |
| 253 | /* |
| 254 | * early identity mapping pte attrib macros. |
| 255 | */ |
| 256 | #ifdef CONFIG_X86_64 |
| 257 | #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC |
| 258 | #else |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 259 | #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ |
Andy Lutomirski | 7dda038 | 2014-03-13 16:01:27 -0700 | [diff] [blame] | 260 | #define PDE_IDENT_ATTR 0x063 /* PRESENT+RW+DIRTY+ACCESSED */ |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 261 | #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ |
| 262 | #endif |
| 263 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 264 | #ifdef CONFIG_X86_32 |
David Howells | a1ce392 | 2012-10-02 18:01:25 +0100 | [diff] [blame] | 265 | # include <asm/pgtable_32_types.h> |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 266 | #else |
David Howells | a1ce392 | 2012-10-02 18:01:25 +0100 | [diff] [blame] | 267 | # include <asm/pgtable_64_types.h> |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 268 | #endif |
| 269 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 270 | #ifndef __ASSEMBLY__ |
| 271 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 272 | #include <linux/types.h> |
| 273 | |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 274 | /* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */ |
Jeremy Fitzhardinge | 9b3651c | 2009-02-13 11:01:54 -0800 | [diff] [blame] | 275 | #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) |
| 276 | |
Dave Hansen | 8f62c88 | 2016-02-12 13:02:10 -0800 | [diff] [blame] | 277 | /* |
| 278 | * Extracts the flags from a (pte|pmd|pud|pgd)val_t |
| 279 | * This includes the protection key value. |
| 280 | */ |
Jeremy Fitzhardinge | 9b3651c | 2009-02-13 11:01:54 -0800 | [diff] [blame] | 281 | #define PTE_FLAGS_MASK (~PTE_PFN_MASK) |
| 282 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 283 | typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; |
| 284 | |
| 285 | typedef struct { pgdval_t pgd; } pgd_t; |
| 286 | |
| 287 | static inline pgd_t native_make_pgd(pgdval_t val) |
| 288 | { |
| 289 | return (pgd_t) { val }; |
| 290 | } |
| 291 | |
| 292 | static inline pgdval_t native_pgd_val(pgd_t pgd) |
| 293 | { |
| 294 | return pgd.pgd; |
| 295 | } |
| 296 | |
| 297 | static inline pgdval_t pgd_flags(pgd_t pgd) |
| 298 | { |
| 299 | return native_pgd_val(pgd) & PTE_FLAGS_MASK; |
| 300 | } |
| 301 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 302 | #if CONFIG_PGTABLE_LEVELS > 3 |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 303 | typedef struct { pudval_t pud; } pud_t; |
| 304 | |
| 305 | static inline pud_t native_make_pud(pmdval_t val) |
| 306 | { |
| 307 | return (pud_t) { val }; |
| 308 | } |
| 309 | |
| 310 | static inline pudval_t native_pud_val(pud_t pud) |
| 311 | { |
| 312 | return pud.pud; |
| 313 | } |
| 314 | #else |
| 315 | #include <asm-generic/pgtable-nopud.h> |
| 316 | |
| 317 | static inline pudval_t native_pud_val(pud_t pud) |
| 318 | { |
| 319 | return native_pgd_val(pud.pgd); |
| 320 | } |
| 321 | #endif |
| 322 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 323 | #if CONFIG_PGTABLE_LEVELS > 2 |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 324 | typedef struct { pmdval_t pmd; } pmd_t; |
| 325 | |
| 326 | static inline pmd_t native_make_pmd(pmdval_t val) |
| 327 | { |
| 328 | return (pmd_t) { val }; |
| 329 | } |
| 330 | |
| 331 | static inline pmdval_t native_pmd_val(pmd_t pmd) |
| 332 | { |
| 333 | return pmd.pmd; |
| 334 | } |
| 335 | #else |
| 336 | #include <asm-generic/pgtable-nopmd.h> |
| 337 | |
| 338 | static inline pmdval_t native_pmd_val(pmd_t pmd) |
| 339 | { |
| 340 | return native_pgd_val(pmd.pud.pgd); |
| 341 | } |
| 342 | #endif |
| 343 | |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 344 | static inline pudval_t pud_pfn_mask(pud_t pud) |
| 345 | { |
| 346 | if (native_pud_val(pud) & _PAGE_PSE) |
Kirill A. Shutemov | 70f15287 | 2015-11-30 11:10:33 +0100 | [diff] [blame] | 347 | return PHYSICAL_PUD_PAGE_MASK; |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 348 | else |
| 349 | return PTE_PFN_MASK; |
| 350 | } |
| 351 | |
| 352 | static inline pudval_t pud_flags_mask(pud_t pud) |
| 353 | { |
Kirill A. Shutemov | 70f15287 | 2015-11-30 11:10:33 +0100 | [diff] [blame] | 354 | return ~pud_pfn_mask(pud); |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 355 | } |
| 356 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 357 | static inline pudval_t pud_flags(pud_t pud) |
| 358 | { |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 359 | return native_pud_val(pud) & pud_flags_mask(pud); |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 360 | } |
| 361 | |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 362 | static inline pmdval_t pmd_pfn_mask(pmd_t pmd) |
| 363 | { |
| 364 | if (native_pmd_val(pmd) & _PAGE_PSE) |
Kirill A. Shutemov | 70f15287 | 2015-11-30 11:10:33 +0100 | [diff] [blame] | 365 | return PHYSICAL_PMD_PAGE_MASK; |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 366 | else |
| 367 | return PTE_PFN_MASK; |
| 368 | } |
| 369 | |
| 370 | static inline pmdval_t pmd_flags_mask(pmd_t pmd) |
| 371 | { |
Kirill A. Shutemov | 70f15287 | 2015-11-30 11:10:33 +0100 | [diff] [blame] | 372 | return ~pmd_pfn_mask(pmd); |
Toshi Kani | 4be4c1f | 2015-09-17 12:24:16 -0600 | [diff] [blame] | 373 | } |
| 374 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 375 | static inline pmdval_t pmd_flags(pmd_t pmd) |
| 376 | { |
Toshi Kani | f70abb0 | 2015-09-17 12:24:17 -0600 | [diff] [blame] | 377 | return native_pmd_val(pmd) & pmd_flags_mask(pmd); |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | static inline pte_t native_make_pte(pteval_t val) |
| 381 | { |
| 382 | return (pte_t) { .pte = val }; |
| 383 | } |
| 384 | |
| 385 | static inline pteval_t native_pte_val(pte_t pte) |
| 386 | { |
| 387 | return pte.pte; |
| 388 | } |
| 389 | |
| 390 | static inline pteval_t pte_flags(pte_t pte) |
| 391 | { |
| 392 | return native_pte_val(pte) & PTE_FLAGS_MASK; |
| 393 | } |
| 394 | |
| 395 | #define pgprot_val(x) ((x).pgprot) |
| 396 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 397 | |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 398 | extern uint16_t __cachemode2pte_tbl[_PAGE_CACHE_MODE_NUM]; |
| 399 | extern uint8_t __pte2cachemode_tbl[8]; |
| 400 | |
| 401 | #define __pte2cm_idx(cb) \ |
| 402 | ((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \ |
| 403 | (((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \ |
| 404 | (((cb) >> _PAGE_BIT_PWT) & 1)) |
Juergen Gross | bd809af | 2014-11-03 14:02:03 +0100 | [diff] [blame] | 405 | #define __cm_idx2pte(i) \ |
| 406 | ((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \ |
| 407 | (((i) & 2) << (_PAGE_BIT_PCD - 1)) | \ |
| 408 | (((i) & 1) << _PAGE_BIT_PWT)) |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 409 | |
| 410 | static inline unsigned long cachemode2protval(enum page_cache_mode pcm) |
| 411 | { |
| 412 | if (likely(pcm == 0)) |
| 413 | return 0; |
| 414 | return __cachemode2pte_tbl[pcm]; |
| 415 | } |
| 416 | static inline pgprot_t cachemode2pgprot(enum page_cache_mode pcm) |
| 417 | { |
| 418 | return __pgprot(cachemode2protval(pcm)); |
| 419 | } |
| 420 | static inline enum page_cache_mode pgprot2cachemode(pgprot_t pgprot) |
| 421 | { |
| 422 | unsigned long masked; |
| 423 | |
| 424 | masked = pgprot_val(pgprot) & _PAGE_CACHE_MASK; |
| 425 | if (likely(masked == 0)) |
| 426 | return 0; |
| 427 | return __pte2cachemode_tbl[__pte2cm_idx(masked)]; |
| 428 | } |
| 429 | static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot) |
| 430 | { |
Jan Beulich | 3625c2c | 2016-01-26 04:15:18 -0700 | [diff] [blame] | 431 | pgprotval_t val = pgprot_val(pgprot); |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 432 | pgprot_t new; |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 433 | |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 434 | pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) | |
| 435 | ((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT)); |
| 436 | return new; |
| 437 | } |
| 438 | static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot) |
| 439 | { |
Jan Beulich | 3625c2c | 2016-01-26 04:15:18 -0700 | [diff] [blame] | 440 | pgprotval_t val = pgprot_val(pgprot); |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 441 | pgprot_t new; |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 442 | |
Juergen Gross | 281d407 | 2014-11-03 14:01:47 +0100 | [diff] [blame] | 443 | pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) | |
| 444 | ((val & _PAGE_PAT_LARGE) >> |
| 445 | (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT)); |
| 446 | return new; |
| 447 | } |
| 448 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 449 | |
| 450 | typedef struct page *pgtable_t; |
| 451 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 452 | extern pteval_t __supported_pte_mask; |
Jeremy Fitzhardinge | c44c9ec | 2009-09-21 13:40:42 -0700 | [diff] [blame] | 453 | extern void set_nx(void); |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 454 | extern int nx_enabled; |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 455 | |
| 456 | #define pgprot_writecombine pgprot_writecombine |
| 457 | extern pgprot_t pgprot_writecombine(pgprot_t prot); |
| 458 | |
Toshi Kani | d1b4bfb | 2015-06-04 18:55:18 +0200 | [diff] [blame] | 459 | #define pgprot_writethrough pgprot_writethrough |
| 460 | extern pgprot_t pgprot_writethrough(pgprot_t prot); |
| 461 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 462 | /* Indicate that x86 has its own track and untrack pfn vma functions */ |
| 463 | #define __HAVE_PFNMAP_TRACKING |
| 464 | |
| 465 | #define __HAVE_PHYS_MEM_ACCESS_PROT |
| 466 | struct file; |
| 467 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| 468 | unsigned long size, pgprot_t vma_prot); |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 469 | |
| 470 | /* Install a pte for a particular vaddr in kernel space. */ |
| 471 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); |
| 472 | |
| 473 | #ifdef CONFIG_X86_32 |
Attilio Rao | 7737b21 | 2012-08-21 21:22:38 +0100 | [diff] [blame] | 474 | extern void native_pagetable_init(void); |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 475 | #else |
Attilio Rao | 843b8ed | 2012-08-21 21:22:39 +0100 | [diff] [blame] | 476 | #define native_pagetable_init paging_init |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 477 | #endif |
| 478 | |
| 479 | struct seq_file; |
| 480 | extern void arch_report_meminfo(struct seq_file *m); |
| 481 | |
Dave Hansen | 4cbeb51 | 2013-01-22 13:24:31 -0800 | [diff] [blame] | 482 | enum pg_level { |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 483 | PG_LEVEL_NONE, |
| 484 | PG_LEVEL_4K, |
| 485 | PG_LEVEL_2M, |
| 486 | PG_LEVEL_1G, |
| 487 | PG_LEVEL_NUM |
| 488 | }; |
| 489 | |
| 490 | #ifdef CONFIG_PROC_FS |
| 491 | extern void update_page_count(int level, unsigned long pages); |
| 492 | #else |
| 493 | static inline void update_page_count(int level, unsigned long pages) { } |
| 494 | #endif |
| 495 | |
| 496 | /* |
| 497 | * Helper function that returns the kernel pagetable entry controlling |
| 498 | * the virtual address 'address'. NULL means no pagetable entry present. |
| 499 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it |
| 500 | * as a pte too. |
| 501 | */ |
| 502 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
Matt Fleming | 426e34c | 2013-12-06 21:13:04 +0000 | [diff] [blame] | 503 | extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address, |
| 504 | unsigned int *level); |
Juergen Gross | 792230c | 2014-11-28 11:53:56 +0100 | [diff] [blame] | 505 | extern pmd_t *lookup_pmd_address(unsigned long address); |
Dave Hansen | d765653 | 2013-01-22 13:24:33 -0800 | [diff] [blame] | 506 | extern phys_addr_t slow_virt_to_phys(void *__address); |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 507 | extern int kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address, |
| 508 | unsigned numpages, unsigned long page_flags); |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 509 | #endif /* !__ASSEMBLY__ */ |
| 510 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 511 | #endif /* _ASM_X86_PGTABLE_DEFS_H */ |