1 #ifndef _ASM_X86_PGTABLE_DEFS_H 2 #define _ASM_X86_PGTABLE_DEFS_H 3 4 #include <linux/const.h> 5 #include <asm/page_types.h> 6 7 #define FIRST_USER_ADDRESS 0 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+ */ 19 #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ 20 #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */ 21 #define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */ 22 #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ 23 #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1 24 #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1 25 #define _PAGE_BIT_SPLITTING _PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */ 26 #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ 27 28 /* If _PAGE_BIT_PRESENT is clear, we use these: */ 29 /* - if the user mapped it with PROT_NONE; pte_present gives true */ 30 #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL 31 /* - set: nonlinear file mapping, saved PTE; unset:swap */ 32 #define _PAGE_BIT_FILE _PAGE_BIT_DIRTY 33 34 #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) 35 #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) 36 #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) 37 #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) 38 #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) 39 #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) 40 #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) 41 #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) 42 #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) 43 #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1) 44 #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP) 45 #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) 46 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) 47 #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) 48 #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) 49 #define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING) 50 #define __HAVE_ARCH_PTE_SPECIAL 51 52 #ifdef CONFIG_KMEMCHECK 53 #define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN) 54 #else 55 #define _PAGE_HIDDEN (_AT(pteval_t, 0)) 56 #endif 57 58 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) 59 #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) 60 #else 61 #define _PAGE_NX (_AT(pteval_t, 0)) 62 #endif 63 64 #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE) 65 #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) 66 67 #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ 68 _PAGE_ACCESSED | _PAGE_DIRTY) 69 #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ 70 _PAGE_DIRTY) 71 72 /* Set of bits not changed in pte_modify */ 73 #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ 74 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY) 75 #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE) 76 77 #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) 78 #define _PAGE_CACHE_WB (0) 79 #define _PAGE_CACHE_WC (_PAGE_PWT) 80 #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) 81 #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) 82 83 #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) 84 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ 85 _PAGE_ACCESSED | _PAGE_NX) 86 87 #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ 88 _PAGE_USER | _PAGE_ACCESSED) 89 #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ 90 _PAGE_ACCESSED | _PAGE_NX) 91 #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ 92 _PAGE_ACCESSED) 93 #define PAGE_COPY PAGE_COPY_NOEXEC 94 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ 95 _PAGE_ACCESSED | _PAGE_NX) 96 #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ 97 _PAGE_ACCESSED) 98 99 #define __PAGE_KERNEL_EXEC \ 100 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) 101 #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) 102 103 #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) 104 #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) 105 #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) 106 #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) 107 #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) 108 #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) 109 #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) 110 #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) 111 #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) 112 #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE) 113 #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) 114 115 #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP) 116 #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP) 117 #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP) 118 #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP) 119 120 #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) 121 #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) 122 #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) 123 #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) 124 #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC) 125 #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) 126 #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS) 127 #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE) 128 #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) 129 #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE) 130 #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) 131 #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) 132 #define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE) 133 134 #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO) 135 #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE) 136 #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS) 137 #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC) 138 139 /* xwr */ 140 #define __P000 PAGE_NONE 141 #define __P001 PAGE_READONLY 142 #define __P010 PAGE_COPY 143 #define __P011 PAGE_COPY 144 #define __P100 PAGE_READONLY_EXEC 145 #define __P101 PAGE_READONLY_EXEC 146 #define __P110 PAGE_COPY_EXEC 147 #define __P111 PAGE_COPY_EXEC 148 149 #define __S000 PAGE_NONE 150 #define __S001 PAGE_READONLY 151 #define __S010 PAGE_SHARED 152 #define __S011 PAGE_SHARED 153 #define __S100 PAGE_READONLY_EXEC 154 #define __S101 PAGE_READONLY_EXEC 155 #define __S110 PAGE_SHARED_EXEC 156 #define __S111 PAGE_SHARED_EXEC 157 158 /* 159 * early identity mapping pte attrib macros. 160 */ 161 #ifdef CONFIG_X86_64 162 #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC 163 #else 164 /* 165 * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection 166 * bits are combined, this will alow user to access the high address mapped 167 * VDSO in the presence of CONFIG_COMPAT_VDSO 168 */ 169 #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ 170 #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */ 171 #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ 172 #endif 173 174 #ifdef CONFIG_X86_32 175 # include "pgtable_32_types.h" 176 #else 177 # include "pgtable_64_types.h" 178 #endif 179 180 #ifndef __ASSEMBLY__ 181 182 #include <linux/types.h> 183 184 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ 185 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) 186 187 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ 188 #define PTE_FLAGS_MASK (~PTE_PFN_MASK) 189 190 typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; 191 192 typedef struct { pgdval_t pgd; } pgd_t; 193 194 static inline pgd_t native_make_pgd(pgdval_t val) 195 { 196 return (pgd_t) { val }; 197 } 198 199 static inline pgdval_t native_pgd_val(pgd_t pgd) 200 { 201 return pgd.pgd; 202 } 203 204 static inline pgdval_t pgd_flags(pgd_t pgd) 205 { 206 return native_pgd_val(pgd) & PTE_FLAGS_MASK; 207 } 208 209 #if PAGETABLE_LEVELS > 3 210 typedef struct { pudval_t pud; } pud_t; 211 212 static inline pud_t native_make_pud(pmdval_t val) 213 { 214 return (pud_t) { val }; 215 } 216 217 static inline pudval_t native_pud_val(pud_t pud) 218 { 219 return pud.pud; 220 } 221 #else 222 #include <asm-generic/pgtable-nopud.h> 223 224 static inline pudval_t native_pud_val(pud_t pud) 225 { 226 return native_pgd_val(pud.pgd); 227 } 228 #endif 229 230 #if PAGETABLE_LEVELS > 2 231 typedef struct { pmdval_t pmd; } pmd_t; 232 233 static inline pmd_t native_make_pmd(pmdval_t val) 234 { 235 return (pmd_t) { val }; 236 } 237 238 static inline pmdval_t native_pmd_val(pmd_t pmd) 239 { 240 return pmd.pmd; 241 } 242 #else 243 #include <asm-generic/pgtable-nopmd.h> 244 245 static inline pmdval_t native_pmd_val(pmd_t pmd) 246 { 247 return native_pgd_val(pmd.pud.pgd); 248 } 249 #endif 250 251 static inline pudval_t pud_flags(pud_t pud) 252 { 253 return native_pud_val(pud) & PTE_FLAGS_MASK; 254 } 255 256 static inline pmdval_t pmd_flags(pmd_t pmd) 257 { 258 return native_pmd_val(pmd) & PTE_FLAGS_MASK; 259 } 260 261 static inline pte_t native_make_pte(pteval_t val) 262 { 263 return (pte_t) { .pte = val }; 264 } 265 266 static inline pteval_t native_pte_val(pte_t pte) 267 { 268 return pte.pte; 269 } 270 271 static inline pteval_t pte_flags(pte_t pte) 272 { 273 return native_pte_val(pte) & PTE_FLAGS_MASK; 274 } 275 276 #define pgprot_val(x) ((x).pgprot) 277 #define __pgprot(x) ((pgprot_t) { (x) } ) 278 279 280 typedef struct page *pgtable_t; 281 282 extern pteval_t __supported_pte_mask; 283 extern void set_nx(void); 284 extern int nx_enabled; 285 286 #define pgprot_writecombine pgprot_writecombine 287 extern pgprot_t pgprot_writecombine(pgprot_t prot); 288 289 /* Indicate that x86 has its own track and untrack pfn vma functions */ 290 #define __HAVE_PFNMAP_TRACKING 291 292 #define __HAVE_PHYS_MEM_ACCESS_PROT 293 struct file; 294 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, 295 unsigned long size, pgprot_t vma_prot); 296 int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, 297 unsigned long size, pgprot_t *vma_prot); 298 299 /* Install a pte for a particular vaddr in kernel space. */ 300 void set_pte_vaddr(unsigned long vaddr, pte_t pte); 301 302 #ifdef CONFIG_X86_32 303 extern void native_pagetable_setup_start(pgd_t *base); 304 extern void native_pagetable_setup_done(pgd_t *base); 305 #else 306 #define native_pagetable_setup_start x86_init_pgd_noop 307 #define native_pagetable_setup_done x86_init_pgd_noop 308 #endif 309 310 struct seq_file; 311 extern void arch_report_meminfo(struct seq_file *m); 312 313 enum { 314 PG_LEVEL_NONE, 315 PG_LEVEL_4K, 316 PG_LEVEL_2M, 317 PG_LEVEL_1G, 318 PG_LEVEL_NUM 319 }; 320 321 #ifdef CONFIG_PROC_FS 322 extern void update_page_count(int level, unsigned long pages); 323 #else 324 static inline void update_page_count(int level, unsigned long pages) { } 325 #endif 326 327 /* 328 * Helper function that returns the kernel pagetable entry controlling 329 * the virtual address 'address'. NULL means no pagetable entry present. 330 * NOTE: the return type is pte_t but if the pmd is PSE then we return it 331 * as a pte too. 332 */ 333 extern pte_t *lookup_address(unsigned long address, unsigned int *level); 334 335 #endif /* !__ASSEMBLY__ */ 336 337 #endif /* _ASM_X86_PGTABLE_DEFS_H */ 338