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8d19c99f JF |
1 | #ifndef _ASM_X86_PGTABLE_DEFS_H |
2 | #define _ASM_X86_PGTABLE_DEFS_H | |
3 | ||
4 | #include <linux/const.h> | |
e43623b4 | 5 | #include <asm/page_types.h> |
8d19c99f JF |
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 */ | |
dfec072e | 21 | #define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */ |
8d19c99f JF |
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 | |
5f6e8da7 | 25 | #define _PAGE_BIT_SPLITTING _PAGE_BIT_UNUSED1 /* only valid on a PSE pmd */ |
8d19c99f JF |
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) | |
8d19c99f JF |
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) | |
5f6e8da7 | 49 | #define _PAGE_SPLITTING (_AT(pteval_t, 1) << _PAGE_BIT_SPLITTING) |
8d19c99f JF |
50 | #define __HAVE_ARCH_PTE_SPECIAL |
51 | ||
9d31c506 JF |
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 | ||
0f8975ec PE |
58 | /* |
59 | * The same hidden bit is used by kmemcheck, but since kmemcheck | |
60 | * works on kernel pages while soft-dirty engine on user space, | |
61 | * they do not conflict with each other. | |
62 | */ | |
63 | ||
64 | #ifdef CONFIG_MEM_SOFT_DIRTY | |
65 | #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN) | |
66 | #else | |
67 | #define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0)) | |
68 | #endif | |
69 | ||
179ef71c CG |
70 | /* |
71 | * Tracking soft dirty bit when a page goes to a swap is tricky. | |
72 | * We need a bit which can be stored in pte _and_ not conflict | |
73 | * with swap entry format. On x86 bits 6 and 7 are *not* involved | |
74 | * into swap entry computation, but bit 6 is used for nonlinear | |
75 | * file mapping, so we borrow bit 7 for soft dirty tracking. | |
76 | */ | |
77 | #ifdef CONFIG_MEM_SOFT_DIRTY | |
78 | #define _PAGE_SWP_SOFT_DIRTY _PAGE_PSE | |
79 | #else | |
80 | #define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0)) | |
81 | #endif | |
82 | ||
8d19c99f JF |
83 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
84 | #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) | |
85 | #else | |
86 | #define _PAGE_NX (_AT(pteval_t, 0)) | |
87 | #endif | |
88 | ||
89 | #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE) | |
90 | #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) | |
91 | ||
dbe4d203 AA |
92 | /* |
93 | * _PAGE_NUMA indicates that this page will trigger a numa hinting | |
94 | * minor page fault to gather numa placement statistics (see | |
95 | * pte_numa()). The bit picked (8) is within the range between | |
96 | * _PAGE_FILE (6) and _PAGE_PROTNONE (8) bits. Therefore, it doesn't | |
97 | * require changes to the swp entry format because that bit is always | |
98 | * zero when the pte is not present. | |
99 | * | |
100 | * The bit picked must be always zero when the pmd is present and not | |
101 | * present, so that we don't lose information when we set it while | |
102 | * atomically clearing the present bit. | |
103 | * | |
104 | * Because we shared the same bit (8) with _PAGE_PROTNONE this can be | |
105 | * interpreted as _PAGE_NUMA only in places that _PAGE_PROTNONE | |
106 | * couldn't reach, like handle_mm_fault() (see access_error in | |
107 | * arch/x86/mm/fault.c, the vma protection must not be PROT_NONE for | |
108 | * handle_mm_fault() to be invoked). | |
109 | */ | |
110 | #define _PAGE_NUMA _PAGE_PROTNONE | |
111 | ||
8d19c99f JF |
112 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
113 | _PAGE_ACCESSED | _PAGE_DIRTY) | |
114 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ | |
115 | _PAGE_DIRTY) | |
116 | ||
117 | /* Set of bits not changed in pte_modify */ | |
118 | #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ | |
119 | _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY) | |
c489f125 | 120 | #define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE) |
8d19c99f JF |
121 | |
122 | #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) | |
123 | #define _PAGE_CACHE_WB (0) | |
124 | #define _PAGE_CACHE_WC (_PAGE_PWT) | |
125 | #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) | |
126 | #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) | |
127 | ||
128 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) | |
129 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ | |
130 | _PAGE_ACCESSED | _PAGE_NX) | |
131 | ||
132 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ | |
133 | _PAGE_USER | _PAGE_ACCESSED) | |
134 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
135 | _PAGE_ACCESSED | _PAGE_NX) | |
136 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
137 | _PAGE_ACCESSED) | |
138 | #define PAGE_COPY PAGE_COPY_NOEXEC | |
139 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
140 | _PAGE_ACCESSED | _PAGE_NX) | |
141 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ | |
142 | _PAGE_ACCESSED) | |
143 | ||
144 | #define __PAGE_KERNEL_EXEC \ | |
145 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) | |
146 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) | |
147 | ||
148 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) | |
149 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) | |
150 | #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) | |
151 | #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) | |
152 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) | |
153 | #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) | |
154 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) | |
9fd67b4e | 155 | #define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER) |
d319bb79 | 156 | #define __PAGE_KERNEL_VVAR_NOCACHE (__PAGE_KERNEL_VVAR | _PAGE_PCD | _PAGE_PWT) |
8d19c99f JF |
157 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
158 | #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE) | |
159 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) | |
160 | ||
161 | #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP) | |
162 | #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP) | |
163 | #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP) | |
164 | #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP) | |
165 | ||
166 | #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) | |
167 | #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) | |
168 | #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) | |
169 | #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) | |
170 | #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC) | |
171 | #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) | |
172 | #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS) | |
173 | #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE) | |
174 | #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) | |
175 | #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE) | |
176 | #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) | |
177 | #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) | |
9fd67b4e | 178 | #define PAGE_KERNEL_VVAR __pgprot(__PAGE_KERNEL_VVAR) |
d319bb79 | 179 | #define PAGE_KERNEL_VVAR_NOCACHE __pgprot(__PAGE_KERNEL_VVAR_NOCACHE) |
8d19c99f JF |
180 | |
181 | #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO) | |
182 | #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE) | |
183 | #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS) | |
184 | #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC) | |
185 | ||
186 | /* xwr */ | |
187 | #define __P000 PAGE_NONE | |
188 | #define __P001 PAGE_READONLY | |
189 | #define __P010 PAGE_COPY | |
190 | #define __P011 PAGE_COPY | |
191 | #define __P100 PAGE_READONLY_EXEC | |
192 | #define __P101 PAGE_READONLY_EXEC | |
193 | #define __P110 PAGE_COPY_EXEC | |
194 | #define __P111 PAGE_COPY_EXEC | |
195 | ||
196 | #define __S000 PAGE_NONE | |
197 | #define __S001 PAGE_READONLY | |
198 | #define __S010 PAGE_SHARED | |
199 | #define __S011 PAGE_SHARED | |
200 | #define __S100 PAGE_READONLY_EXEC | |
201 | #define __S101 PAGE_READONLY_EXEC | |
202 | #define __S110 PAGE_SHARED_EXEC | |
203 | #define __S111 PAGE_SHARED_EXEC | |
204 | ||
205 | /* | |
206 | * early identity mapping pte attrib macros. | |
207 | */ | |
208 | #ifdef CONFIG_X86_64 | |
209 | #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC | |
210 | #else | |
211 | /* | |
212 | * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection | |
213 | * bits are combined, this will alow user to access the high address mapped | |
214 | * VDSO in the presence of CONFIG_COMPAT_VDSO | |
215 | */ | |
216 | #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ | |
217 | #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */ | |
218 | #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ | |
219 | #endif | |
220 | ||
54321d94 | 221 | #ifdef CONFIG_X86_32 |
a1ce3928 | 222 | # include <asm/pgtable_32_types.h> |
54321d94 | 223 | #else |
a1ce3928 | 224 | # include <asm/pgtable_64_types.h> |
54321d94 JF |
225 | #endif |
226 | ||
8d19c99f JF |
227 | #ifndef __ASSEMBLY__ |
228 | ||
54321d94 JF |
229 | #include <linux/types.h> |
230 | ||
9b3651cb JF |
231 | /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ |
232 | #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) | |
233 | ||
234 | /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ | |
235 | #define PTE_FLAGS_MASK (~PTE_PFN_MASK) | |
236 | ||
54321d94 JF |
237 | typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; |
238 | ||
239 | typedef struct { pgdval_t pgd; } pgd_t; | |
240 | ||
241 | static inline pgd_t native_make_pgd(pgdval_t val) | |
242 | { | |
243 | return (pgd_t) { val }; | |
244 | } | |
245 | ||
246 | static inline pgdval_t native_pgd_val(pgd_t pgd) | |
247 | { | |
248 | return pgd.pgd; | |
249 | } | |
250 | ||
251 | static inline pgdval_t pgd_flags(pgd_t pgd) | |
252 | { | |
253 | return native_pgd_val(pgd) & PTE_FLAGS_MASK; | |
254 | } | |
255 | ||
256 | #if PAGETABLE_LEVELS > 3 | |
257 | typedef struct { pudval_t pud; } pud_t; | |
258 | ||
259 | static inline pud_t native_make_pud(pmdval_t val) | |
260 | { | |
261 | return (pud_t) { val }; | |
262 | } | |
263 | ||
264 | static inline pudval_t native_pud_val(pud_t pud) | |
265 | { | |
266 | return pud.pud; | |
267 | } | |
268 | #else | |
269 | #include <asm-generic/pgtable-nopud.h> | |
270 | ||
271 | static inline pudval_t native_pud_val(pud_t pud) | |
272 | { | |
273 | return native_pgd_val(pud.pgd); | |
274 | } | |
275 | #endif | |
276 | ||
277 | #if PAGETABLE_LEVELS > 2 | |
278 | typedef struct { pmdval_t pmd; } pmd_t; | |
279 | ||
280 | static inline pmd_t native_make_pmd(pmdval_t val) | |
281 | { | |
282 | return (pmd_t) { val }; | |
283 | } | |
284 | ||
285 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
286 | { | |
287 | return pmd.pmd; | |
288 | } | |
289 | #else | |
290 | #include <asm-generic/pgtable-nopmd.h> | |
291 | ||
292 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
293 | { | |
294 | return native_pgd_val(pmd.pud.pgd); | |
295 | } | |
296 | #endif | |
297 | ||
298 | static inline pudval_t pud_flags(pud_t pud) | |
299 | { | |
300 | return native_pud_val(pud) & PTE_FLAGS_MASK; | |
301 | } | |
302 | ||
303 | static inline pmdval_t pmd_flags(pmd_t pmd) | |
304 | { | |
305 | return native_pmd_val(pmd) & PTE_FLAGS_MASK; | |
306 | } | |
307 | ||
308 | static inline pte_t native_make_pte(pteval_t val) | |
309 | { | |
310 | return (pte_t) { .pte = val }; | |
311 | } | |
312 | ||
313 | static inline pteval_t native_pte_val(pte_t pte) | |
314 | { | |
315 | return pte.pte; | |
316 | } | |
317 | ||
318 | static inline pteval_t pte_flags(pte_t pte) | |
319 | { | |
320 | return native_pte_val(pte) & PTE_FLAGS_MASK; | |
321 | } | |
322 | ||
323 | #define pgprot_val(x) ((x).pgprot) | |
324 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
325 | ||
326 | ||
327 | typedef struct page *pgtable_t; | |
328 | ||
8d19c99f | 329 | extern pteval_t __supported_pte_mask; |
c44c9ec0 | 330 | extern void set_nx(void); |
54321d94 | 331 | extern int nx_enabled; |
8d19c99f JF |
332 | |
333 | #define pgprot_writecombine pgprot_writecombine | |
334 | extern pgprot_t pgprot_writecombine(pgprot_t prot); | |
335 | ||
336 | /* Indicate that x86 has its own track and untrack pfn vma functions */ | |
337 | #define __HAVE_PFNMAP_TRACKING | |
338 | ||
339 | #define __HAVE_PHYS_MEM_ACCESS_PROT | |
340 | struct file; | |
341 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | |
342 | unsigned long size, pgprot_t vma_prot); | |
343 | int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, | |
344 | unsigned long size, pgprot_t *vma_prot); | |
345 | ||
346 | /* Install a pte for a particular vaddr in kernel space. */ | |
347 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); | |
348 | ||
349 | #ifdef CONFIG_X86_32 | |
7737b215 | 350 | extern void native_pagetable_init(void); |
8d19c99f | 351 | #else |
843b8ed2 | 352 | #define native_pagetable_init paging_init |
8d19c99f JF |
353 | #endif |
354 | ||
355 | struct seq_file; | |
356 | extern void arch_report_meminfo(struct seq_file *m); | |
357 | ||
4cbeb51b | 358 | enum pg_level { |
8d19c99f JF |
359 | PG_LEVEL_NONE, |
360 | PG_LEVEL_4K, | |
361 | PG_LEVEL_2M, | |
362 | PG_LEVEL_1G, | |
363 | PG_LEVEL_NUM | |
364 | }; | |
365 | ||
366 | #ifdef CONFIG_PROC_FS | |
367 | extern void update_page_count(int level, unsigned long pages); | |
368 | #else | |
369 | static inline void update_page_count(int level, unsigned long pages) { } | |
370 | #endif | |
371 | ||
372 | /* | |
373 | * Helper function that returns the kernel pagetable entry controlling | |
374 | * the virtual address 'address'. NULL means no pagetable entry present. | |
375 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it | |
376 | * as a pte too. | |
377 | */ | |
378 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); | |
d7656534 | 379 | extern phys_addr_t slow_virt_to_phys(void *__address); |
8d19c99f JF |
380 | |
381 | #endif /* !__ASSEMBLY__ */ | |
382 | ||
383 | #endif /* _ASM_X86_PGTABLE_DEFS_H */ |