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/arch/x86/include/asm/pgtable_types.h

https://gitlab.com/SpasilliumNexus/frankenclark_kernel
C Header | 358 lines | 257 code | 60 blank | 41 comment | 1 complexity | 1989218609d113e6107deb934e954f3c MD5 | raw file
  1. #ifndef _ASM_X86_PGTABLE_DEFS_H
  2. #define _ASM_X86_PGTABLE_DEFS_H
  3. #include <linux/const.h>
  4. #include <asm/page_types.h>
  5. #define FIRST_USER_ADDRESS 0
  6. #define _PAGE_BIT_PRESENT 0 /* is present */
  7. #define _PAGE_BIT_RW 1 /* writeable */
  8. #define _PAGE_BIT_USER 2 /* userspace addressable */
  9. #define _PAGE_BIT_PWT 3 /* page write through */
  10. #define _PAGE_BIT_PCD 4 /* page cache disabled */
  11. #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
  12. #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
  13. #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
  14. #define _PAGE_BIT_PAT 7 /* on 4KB pages */
  15. #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
  16. #define _PAGE_BIT_UNUSED1 9 /* available for programmer */
  17. #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
  18. #define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */
  19. #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
  20. #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
  21. #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
  22. #define _PAGE_BIT_SPLITTING _PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */
  23. #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
  24. /* If _PAGE_BIT_PRESENT is clear, we use these: */
  25. /* - if the user mapped it with PROT_NONE; pte_present gives true */
  26. #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
  27. /* - set: nonlinear file mapping, saved PTE; unset:swap */
  28. #define _PAGE_BIT_FILE _PAGE_BIT_DIRTY
  29. #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
  30. #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
  31. #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
  32. #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
  33. #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
  34. #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
  35. #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
  36. #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
  37. #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
  38. #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
  39. #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
  40. #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
  41. #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
  42. #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
  43. #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
  44. #define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING)
  45. #define __HAVE_ARCH_PTE_SPECIAL
  46. #ifdef CONFIG_KMEMCHECK
  47. #define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
  48. #else
  49. #define _PAGE_HIDDEN (_AT(pteval_t, 0))
  50. #endif
  51. #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
  52. #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
  53. #else
  54. #define _PAGE_NX (_AT(pteval_t, 0))
  55. #endif
  56. #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
  57. #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
  58. /*
  59. * _PAGE_NUMA indicates that this page will trigger a numa hinting
  60. * minor page fault to gather numa placement statistics (see
  61. * pte_numa()). The bit picked (8) is within the range between
  62. * _PAGE_FILE (6) and _PAGE_PROTNONE (8) bits. Therefore, it doesn't
  63. * require changes to the swp entry format because that bit is always
  64. * zero when the pte is not present.
  65. *
  66. * The bit picked must be always zero when the pmd is present and not
  67. * present, so that we don't lose information when we set it while
  68. * atomically clearing the present bit.
  69. *
  70. * Because we shared the same bit (8) with _PAGE_PROTNONE this can be
  71. * interpreted as _PAGE_NUMA only in places that _PAGE_PROTNONE
  72. * couldn't reach, like handle_mm_fault() (see access_error in
  73. * arch/x86/mm/fault.c, the vma protection must not be PROT_NONE for
  74. * handle_mm_fault() to be invoked).
  75. */
  76. #define _PAGE_NUMA _PAGE_PROTNONE
  77. #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
  78. _PAGE_ACCESSED | _PAGE_DIRTY)
  79. #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
  80. _PAGE_DIRTY)
  81. /* Set of bits not changed in pte_modify */
  82. #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
  83. _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
  84. #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
  85. #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT)
  86. #define _PAGE_CACHE_WB (0)
  87. #define _PAGE_CACHE_WC (_PAGE_PWT)
  88. #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
  89. #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
  90. #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
  91. #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
  92. _PAGE_ACCESSED | _PAGE_NX)
  93. #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
  94. _PAGE_USER | _PAGE_ACCESSED)
  95. #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
  96. _PAGE_ACCESSED | _PAGE_NX)
  97. #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
  98. _PAGE_ACCESSED)
  99. #define PAGE_COPY PAGE_COPY_NOEXEC
  100. #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
  101. _PAGE_ACCESSED | _PAGE_NX)
  102. #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
  103. _PAGE_ACCESSED)
  104. #define __PAGE_KERNEL_EXEC \
  105. (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
  106. #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
  107. #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
  108. #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
  109. #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
  110. #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
  111. #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
  112. #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
  113. #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
  114. #define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER)
  115. #define __PAGE_KERNEL_VVAR_NOCACHE (__PAGE_KERNEL_VVAR | _PAGE_PCD | _PAGE_PWT)
  116. #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
  117. #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
  118. #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
  119. #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
  120. #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
  121. #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
  122. #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
  123. #define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
  124. #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
  125. #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
  126. #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
  127. #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
  128. #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
  129. #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
  130. #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
  131. #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
  132. #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
  133. #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
  134. #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
  135. #define PAGE_KERNEL_VVAR __pgprot(__PAGE_KERNEL_VVAR)
  136. #define PAGE_KERNEL_VVAR_NOCACHE __pgprot(__PAGE_KERNEL_VVAR_NOCACHE)
  137. #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
  138. #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
  139. #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
  140. #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
  141. /* xwr */
  142. #define __P000 PAGE_NONE
  143. #define __P001 PAGE_READONLY
  144. #define __P010 PAGE_COPY
  145. #define __P011 PAGE_COPY
  146. #define __P100 PAGE_READONLY_EXEC
  147. #define __P101 PAGE_READONLY_EXEC
  148. #define __P110 PAGE_COPY_EXEC
  149. #define __P111 PAGE_COPY_EXEC
  150. #define __S000 PAGE_NONE
  151. #define __S001 PAGE_READONLY
  152. #define __S010 PAGE_SHARED
  153. #define __S011 PAGE_SHARED
  154. #define __S100 PAGE_READONLY_EXEC
  155. #define __S101 PAGE_READONLY_EXEC
  156. #define __S110 PAGE_SHARED_EXEC
  157. #define __S111 PAGE_SHARED_EXEC
  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. #ifdef CONFIG_X86_32
  174. # include <asm/pgtable_32_types.h>
  175. #else
  176. # include <asm/pgtable_64_types.h>
  177. #endif
  178. #ifndef __ASSEMBLY__
  179. #include <linux/types.h>
  180. /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
  181. #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
  182. /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
  183. #define PTE_FLAGS_MASK (~PTE_PFN_MASK)
  184. typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
  185. typedef struct { pgdval_t pgd; } pgd_t;
  186. static inline pgd_t native_make_pgd(pgdval_t val)
  187. {
  188. return (pgd_t) { val };
  189. }
  190. static inline pgdval_t native_pgd_val(pgd_t pgd)
  191. {
  192. return pgd.pgd;
  193. }
  194. static inline pgdval_t pgd_flags(pgd_t pgd)
  195. {
  196. return native_pgd_val(pgd) & PTE_FLAGS_MASK;
  197. }
  198. #if PAGETABLE_LEVELS > 3
  199. typedef struct { pudval_t pud; } pud_t;
  200. static inline pud_t native_make_pud(pmdval_t val)
  201. {
  202. return (pud_t) { val };
  203. }
  204. static inline pudval_t native_pud_val(pud_t pud)
  205. {
  206. return pud.pud;
  207. }
  208. #else
  209. #include <asm-generic/pgtable-nopud.h>
  210. static inline pudval_t native_pud_val(pud_t pud)
  211. {
  212. return native_pgd_val(pud.pgd);
  213. }
  214. #endif
  215. #if PAGETABLE_LEVELS > 2
  216. typedef struct { pmdval_t pmd; } pmd_t;
  217. static inline pmd_t native_make_pmd(pmdval_t val)
  218. {
  219. return (pmd_t) { val };
  220. }
  221. static inline pmdval_t native_pmd_val(pmd_t pmd)
  222. {
  223. return pmd.pmd;
  224. }
  225. #else
  226. #include <asm-generic/pgtable-nopmd.h>
  227. static inline pmdval_t native_pmd_val(pmd_t pmd)
  228. {
  229. return native_pgd_val(pmd.pud.pgd);
  230. }
  231. #endif
  232. static inline pudval_t pud_flags(pud_t pud)
  233. {
  234. return native_pud_val(pud) & PTE_FLAGS_MASK;
  235. }
  236. static inline pmdval_t pmd_flags(pmd_t pmd)
  237. {
  238. return native_pmd_val(pmd) & PTE_FLAGS_MASK;
  239. }
  240. static inline pte_t native_make_pte(pteval_t val)
  241. {
  242. return (pte_t) { .pte = val };
  243. }
  244. static inline pteval_t native_pte_val(pte_t pte)
  245. {
  246. return pte.pte;
  247. }
  248. static inline pteval_t pte_flags(pte_t pte)
  249. {
  250. return native_pte_val(pte) & PTE_FLAGS_MASK;
  251. }
  252. #define pgprot_val(x) ((x).pgprot)
  253. #define __pgprot(x) ((pgprot_t) { (x) } )
  254. typedef struct page *pgtable_t;
  255. extern pteval_t __supported_pte_mask;
  256. extern void set_nx(void);
  257. extern int nx_enabled;
  258. #define pgprot_writecombine pgprot_writecombine
  259. extern pgprot_t pgprot_writecombine(pgprot_t prot);
  260. /* Indicate that x86 has its own track and untrack pfn vma functions */
  261. #define __HAVE_PFNMAP_TRACKING
  262. #define __HAVE_PHYS_MEM_ACCESS_PROT
  263. struct file;
  264. pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
  265. unsigned long size, pgprot_t vma_prot);
  266. int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
  267. unsigned long size, pgprot_t *vma_prot);
  268. /* Install a pte for a particular vaddr in kernel space. */
  269. void set_pte_vaddr(unsigned long vaddr, pte_t pte);
  270. #ifdef CONFIG_X86_32
  271. extern void native_pagetable_init(void);
  272. #else
  273. #define native_pagetable_init paging_init
  274. #endif
  275. struct seq_file;
  276. extern void arch_report_meminfo(struct seq_file *m);
  277. enum pg_level {
  278. PG_LEVEL_NONE,
  279. PG_LEVEL_4K,
  280. PG_LEVEL_2M,
  281. PG_LEVEL_1G,
  282. PG_LEVEL_NUM
  283. };
  284. #ifdef CONFIG_PROC_FS
  285. extern void update_page_count(int level, unsigned long pages);
  286. #else
  287. static inline void update_page_count(int level, unsigned long pages) { }
  288. #endif
  289. /*
  290. * Helper function that returns the kernel pagetable entry controlling
  291. * the virtual address 'address'. NULL means no pagetable entry present.
  292. * NOTE: the return type is pte_t but if the pmd is PSE then we return it
  293. * as a pte too.
  294. */
  295. extern pte_t *lookup_address(unsigned long address, unsigned int *level);
  296. extern phys_addr_t slow_virt_to_phys(void *__address);
  297. #endif /* !__ASSEMBLY__ */
  298. #endif /* _ASM_X86_PGTABLE_DEFS_H */