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Commit | Line | Data |
---|---|---|
5e1f65a6 | 1 | /* |
ba180fd4 | 2 | * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
8192ab42 | 6 | #include <linux/mm.h> |
73395a00 | 7 | #include <linux/module.h> |
8192ab42 JD |
8 | #include <linux/sched.h> |
9 | #include <asm/pgtable.h> | |
10 | #include <asm/tlbflush.h> | |
37185b33 AV |
11 | #include <as-layout.h> |
12 | #include <mem_user.h> | |
13 | #include <os.h> | |
14 | #include <skas.h> | |
468f6597 | 15 | #include <kern_util.h> |
1da177e4 | 16 | |
1466abf2 JD |
17 | struct host_vm_change { |
18 | struct host_vm_op { | |
19 | enum { NONE, MMAP, MUNMAP, MPROTECT } type; | |
20 | union { | |
21 | struct { | |
22 | unsigned long addr; | |
23 | unsigned long len; | |
24 | unsigned int prot; | |
25 | int fd; | |
26 | __u64 offset; | |
27 | } mmap; | |
28 | struct { | |
29 | unsigned long addr; | |
30 | unsigned long len; | |
31 | } munmap; | |
32 | struct { | |
33 | unsigned long addr; | |
34 | unsigned long len; | |
35 | unsigned int prot; | |
36 | } mprotect; | |
37 | } u; | |
38 | } ops[1]; | |
39 | int index; | |
40 | struct mm_id *id; | |
41 | void *data; | |
42 | int force; | |
43 | }; | |
44 | ||
45 | #define INIT_HVC(mm, force) \ | |
46 | ((struct host_vm_change) \ | |
47 | { .ops = { { .type = NONE } }, \ | |
48 | .id = &mm->context.id, \ | |
49 | .data = NULL, \ | |
50 | .index = 0, \ | |
51 | .force = force }) | |
52 | ||
70c8205f RW |
53 | static void report_enomem(void) |
54 | { | |
55 | printk(KERN_ERR "UML ran out of memory on the host side! " | |
56 | "This can happen due to a memory limitation or " | |
57 | "vm.max_map_count has been reached.\n"); | |
58 | } | |
59 | ||
1466abf2 JD |
60 | static int do_ops(struct host_vm_change *hvc, int end, |
61 | int finished) | |
62 | { | |
63 | struct host_vm_op *op; | |
64 | int i, ret = 0; | |
65 | ||
66 | for (i = 0; i < end && !ret; i++) { | |
67 | op = &hvc->ops[i]; | |
c5d4bb17 | 68 | switch (op->type) { |
1466abf2 JD |
69 | case MMAP: |
70 | ret = map(hvc->id, op->u.mmap.addr, op->u.mmap.len, | |
71 | op->u.mmap.prot, op->u.mmap.fd, | |
72 | op->u.mmap.offset, finished, &hvc->data); | |
73 | break; | |
74 | case MUNMAP: | |
75 | ret = unmap(hvc->id, op->u.munmap.addr, | |
76 | op->u.munmap.len, finished, &hvc->data); | |
77 | break; | |
78 | case MPROTECT: | |
79 | ret = protect(hvc->id, op->u.mprotect.addr, | |
80 | op->u.mprotect.len, op->u.mprotect.prot, | |
81 | finished, &hvc->data); | |
82 | break; | |
83 | default: | |
84 | printk(KERN_ERR "Unknown op type %d in do_ops\n", | |
85 | op->type); | |
62179d47 | 86 | BUG(); |
1466abf2 JD |
87 | break; |
88 | } | |
89 | } | |
90 | ||
70c8205f RW |
91 | if (ret == -ENOMEM) |
92 | report_enomem(); | |
93 | ||
1466abf2 JD |
94 | return ret; |
95 | } | |
96 | ||
c5600490 | 97 | static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, |
1466abf2 | 98 | unsigned int prot, struct host_vm_change *hvc) |
c5600490 | 99 | { |
5e1f65a6 | 100 | __u64 offset; |
c5600490 | 101 | struct host_vm_op *last; |
07bf731e | 102 | int fd, ret = 0; |
c5600490 JD |
103 | |
104 | fd = phys_mapping(phys, &offset); | |
1466abf2 JD |
105 | if (hvc->index != 0) { |
106 | last = &hvc->ops[hvc->index - 1]; | |
ba180fd4 | 107 | if ((last->type == MMAP) && |
c5600490 | 108 | (last->u.mmap.addr + last->u.mmap.len == virt) && |
16dd07bc | 109 | (last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) && |
ba180fd4 | 110 | (last->u.mmap.offset + last->u.mmap.len == offset)) { |
c5600490 | 111 | last->u.mmap.len += len; |
07bf731e | 112 | return 0; |
c5600490 JD |
113 | } |
114 | } | |
115 | ||
1466abf2 JD |
116 | if (hvc->index == ARRAY_SIZE(hvc->ops)) { |
117 | ret = do_ops(hvc, ARRAY_SIZE(hvc->ops), 0); | |
118 | hvc->index = 0; | |
c5600490 JD |
119 | } |
120 | ||
1466abf2 JD |
121 | hvc->ops[hvc->index++] = ((struct host_vm_op) |
122 | { .type = MMAP, | |
123 | .u = { .mmap = { .addr = virt, | |
124 | .len = len, | |
125 | .prot = prot, | |
126 | .fd = fd, | |
127 | .offset = offset } | |
07bf731e BS |
128 | } }); |
129 | return ret; | |
c5600490 JD |
130 | } |
131 | ||
132 | static int add_munmap(unsigned long addr, unsigned long len, | |
1466abf2 | 133 | struct host_vm_change *hvc) |
c5600490 JD |
134 | { |
135 | struct host_vm_op *last; | |
07bf731e | 136 | int ret = 0; |
c5600490 | 137 | |
284e6d39 RW |
138 | if ((addr >= STUB_START) && (addr < STUB_END)) |
139 | return -EINVAL; | |
140 | ||
1466abf2 JD |
141 | if (hvc->index != 0) { |
142 | last = &hvc->ops[hvc->index - 1]; | |
ba180fd4 JD |
143 | if ((last->type == MUNMAP) && |
144 | (last->u.munmap.addr + last->u.mmap.len == addr)) { | |
c5600490 | 145 | last->u.munmap.len += len; |
07bf731e | 146 | return 0; |
c5600490 JD |
147 | } |
148 | } | |
149 | ||
1466abf2 JD |
150 | if (hvc->index == ARRAY_SIZE(hvc->ops)) { |
151 | ret = do_ops(hvc, ARRAY_SIZE(hvc->ops), 0); | |
152 | hvc->index = 0; | |
c5600490 JD |
153 | } |
154 | ||
1466abf2 JD |
155 | hvc->ops[hvc->index++] = ((struct host_vm_op) |
156 | { .type = MUNMAP, | |
157 | .u = { .munmap = { .addr = addr, | |
158 | .len = len } } }); | |
07bf731e | 159 | return ret; |
c5600490 JD |
160 | } |
161 | ||
16dd07bc | 162 | static int add_mprotect(unsigned long addr, unsigned long len, |
1466abf2 | 163 | unsigned int prot, struct host_vm_change *hvc) |
c5600490 JD |
164 | { |
165 | struct host_vm_op *last; | |
07bf731e | 166 | int ret = 0; |
c5600490 | 167 | |
1466abf2 JD |
168 | if (hvc->index != 0) { |
169 | last = &hvc->ops[hvc->index - 1]; | |
ba180fd4 | 170 | if ((last->type == MPROTECT) && |
c5600490 | 171 | (last->u.mprotect.addr + last->u.mprotect.len == addr) && |
ba180fd4 | 172 | (last->u.mprotect.prot == prot)) { |
c5600490 | 173 | last->u.mprotect.len += len; |
07bf731e | 174 | return 0; |
c5600490 JD |
175 | } |
176 | } | |
177 | ||
1466abf2 JD |
178 | if (hvc->index == ARRAY_SIZE(hvc->ops)) { |
179 | ret = do_ops(hvc, ARRAY_SIZE(hvc->ops), 0); | |
180 | hvc->index = 0; | |
c5600490 JD |
181 | } |
182 | ||
1466abf2 JD |
183 | hvc->ops[hvc->index++] = ((struct host_vm_op) |
184 | { .type = MPROTECT, | |
185 | .u = { .mprotect = { .addr = addr, | |
186 | .len = len, | |
187 | .prot = prot } } }); | |
07bf731e | 188 | return ret; |
c5600490 JD |
189 | } |
190 | ||
1da177e4 LT |
191 | #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1)) |
192 | ||
7f0536f8 | 193 | static inline int update_pte_range(pmd_t *pmd, unsigned long addr, |
1466abf2 JD |
194 | unsigned long end, |
195 | struct host_vm_change *hvc) | |
7f0536f8 JD |
196 | { |
197 | pte_t *pte; | |
16dd07bc | 198 | int r, w, x, prot, ret = 0; |
7f0536f8 JD |
199 | |
200 | pte = pte_offset_kernel(pmd, addr); | |
201 | do { | |
3963333f JD |
202 | if ((addr >= STUB_START) && (addr < STUB_END)) |
203 | continue; | |
204 | ||
7f0536f8 JD |
205 | r = pte_read(*pte); |
206 | w = pte_write(*pte); | |
207 | x = pte_exec(*pte); | |
208 | if (!pte_young(*pte)) { | |
209 | r = 0; | |
210 | w = 0; | |
0b4e273f | 211 | } else if (!pte_dirty(*pte)) |
7f0536f8 | 212 | w = 0; |
0b4e273f | 213 | |
16dd07bc JD |
214 | prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | |
215 | (x ? UM_PROT_EXEC : 0)); | |
1466abf2 | 216 | if (hvc->force || pte_newpage(*pte)) { |
ba180fd4 | 217 | if (pte_present(*pte)) |
7f0536f8 | 218 | ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK, |
1466abf2 | 219 | PAGE_SIZE, prot, hvc); |
0b4e273f JD |
220 | else |
221 | ret = add_munmap(addr, PAGE_SIZE, hvc); | |
222 | } else if (pte_newprot(*pte)) | |
1466abf2 | 223 | ret = add_mprotect(addr, PAGE_SIZE, prot, hvc); |
7f0536f8 | 224 | *pte = pte_mkuptodate(*pte); |
909e90d3 | 225 | } while (pte++, addr += PAGE_SIZE, ((addr < end) && !ret)); |
7f0536f8 JD |
226 | return ret; |
227 | } | |
228 | ||
229 | static inline int update_pmd_range(pud_t *pud, unsigned long addr, | |
1466abf2 JD |
230 | unsigned long end, |
231 | struct host_vm_change *hvc) | |
7f0536f8 JD |
232 | { |
233 | pmd_t *pmd; | |
234 | unsigned long next; | |
235 | int ret = 0; | |
236 | ||
237 | pmd = pmd_offset(pud, addr); | |
238 | do { | |
239 | next = pmd_addr_end(addr, end); | |
ba180fd4 | 240 | if (!pmd_present(*pmd)) { |
1466abf2 JD |
241 | if (hvc->force || pmd_newpage(*pmd)) { |
242 | ret = add_munmap(addr, next - addr, hvc); | |
7f0536f8 JD |
243 | pmd_mkuptodate(*pmd); |
244 | } | |
245 | } | |
1466abf2 | 246 | else ret = update_pte_range(pmd, addr, next, hvc); |
909e90d3 | 247 | } while (pmd++, addr = next, ((addr < end) && !ret)); |
7f0536f8 JD |
248 | return ret; |
249 | } | |
250 | ||
251 | static inline int update_pud_range(pgd_t *pgd, unsigned long addr, | |
1466abf2 JD |
252 | unsigned long end, |
253 | struct host_vm_change *hvc) | |
7f0536f8 JD |
254 | { |
255 | pud_t *pud; | |
256 | unsigned long next; | |
257 | int ret = 0; | |
258 | ||
259 | pud = pud_offset(pgd, addr); | |
260 | do { | |
261 | next = pud_addr_end(addr, end); | |
ba180fd4 | 262 | if (!pud_present(*pud)) { |
1466abf2 JD |
263 | if (hvc->force || pud_newpage(*pud)) { |
264 | ret = add_munmap(addr, next - addr, hvc); | |
7f0536f8 JD |
265 | pud_mkuptodate(*pud); |
266 | } | |
267 | } | |
1466abf2 | 268 | else ret = update_pmd_range(pud, addr, next, hvc); |
909e90d3 | 269 | } while (pud++, addr = next, ((addr < end) && !ret)); |
7f0536f8 JD |
270 | return ret; |
271 | } | |
272 | ||
1da177e4 | 273 | void fix_range_common(struct mm_struct *mm, unsigned long start_addr, |
1466abf2 | 274 | unsigned long end_addr, int force) |
1da177e4 | 275 | { |
7f0536f8 | 276 | pgd_t *pgd; |
1466abf2 | 277 | struct host_vm_change hvc; |
7f0536f8 | 278 | unsigned long addr = start_addr, next; |
1466abf2 | 279 | int ret = 0; |
1da177e4 | 280 | |
1466abf2 | 281 | hvc = INIT_HVC(mm, force); |
7f0536f8 JD |
282 | pgd = pgd_offset(mm, addr); |
283 | do { | |
284 | next = pgd_addr_end(addr, end_addr); | |
ba180fd4 JD |
285 | if (!pgd_present(*pgd)) { |
286 | if (force || pgd_newpage(*pgd)) { | |
1466abf2 | 287 | ret = add_munmap(addr, next - addr, &hvc); |
7f0536f8 | 288 | pgd_mkuptodate(*pgd); |
5e1f65a6 | 289 | } |
5e1f65a6 | 290 | } |
1466abf2 | 291 | else ret = update_pud_range(pgd, addr, next, &hvc); |
909e90d3 | 292 | } while (pgd++, addr = next, ((addr < end_addr) && !ret)); |
5e1f65a6 | 293 | |
ba180fd4 | 294 | if (!ret) |
1466abf2 | 295 | ret = do_ops(&hvc, hvc.index, 1); |
07bf731e | 296 | |
7f0536f8 | 297 | /* This is not an else because ret is modified above */ |
ba180fd4 JD |
298 | if (ret) { |
299 | printk(KERN_ERR "fix_range_common: failed, killing current " | |
468f6597 RW |
300 | "process: %d\n", task_tgid_vnr(current)); |
301 | /* We are under mmap_sem, release it such that current can terminate */ | |
302 | up_write(¤t->mm->mmap_sem); | |
07bf731e | 303 | force_sig(SIGKILL, current); |
ccaee5f8 | 304 | do_signal(¤t->thread.regs); |
07bf731e | 305 | } |
1da177e4 LT |
306 | } |
307 | ||
c75d053b | 308 | static int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) |
1da177e4 | 309 | { |
5e1f65a6 JD |
310 | struct mm_struct *mm; |
311 | pgd_t *pgd; | |
312 | pud_t *pud; | |
313 | pmd_t *pmd; | |
314 | pte_t *pte; | |
315 | unsigned long addr, last; | |
316 | int updated = 0, err; | |
317 | ||
318 | mm = &init_mm; | |
ba180fd4 | 319 | for (addr = start; addr < end;) { |
5e1f65a6 | 320 | pgd = pgd_offset(mm, addr); |
ba180fd4 | 321 | if (!pgd_present(*pgd)) { |
5e1f65a6 | 322 | last = ADD_ROUND(addr, PGDIR_SIZE); |
ba180fd4 | 323 | if (last > end) |
5e1f65a6 | 324 | last = end; |
ba180fd4 | 325 | if (pgd_newpage(*pgd)) { |
5e1f65a6 JD |
326 | updated = 1; |
327 | err = os_unmap_memory((void *) addr, | |
328 | last - addr); | |
ba180fd4 | 329 | if (err < 0) |
5e1f65a6 JD |
330 | panic("munmap failed, errno = %d\n", |
331 | -err); | |
332 | } | |
333 | addr = last; | |
334 | continue; | |
335 | } | |
336 | ||
337 | pud = pud_offset(pgd, addr); | |
ba180fd4 | 338 | if (!pud_present(*pud)) { |
5e1f65a6 | 339 | last = ADD_ROUND(addr, PUD_SIZE); |
ba180fd4 | 340 | if (last > end) |
5e1f65a6 | 341 | last = end; |
ba180fd4 | 342 | if (pud_newpage(*pud)) { |
5e1f65a6 JD |
343 | updated = 1; |
344 | err = os_unmap_memory((void *) addr, | |
345 | last - addr); | |
ba180fd4 | 346 | if (err < 0) |
5e1f65a6 JD |
347 | panic("munmap failed, errno = %d\n", |
348 | -err); | |
349 | } | |
350 | addr = last; | |
351 | continue; | |
352 | } | |
353 | ||
354 | pmd = pmd_offset(pud, addr); | |
ba180fd4 | 355 | if (!pmd_present(*pmd)) { |
5e1f65a6 | 356 | last = ADD_ROUND(addr, PMD_SIZE); |
ba180fd4 | 357 | if (last > end) |
5e1f65a6 | 358 | last = end; |
ba180fd4 | 359 | if (pmd_newpage(*pmd)) { |
5e1f65a6 JD |
360 | updated = 1; |
361 | err = os_unmap_memory((void *) addr, | |
362 | last - addr); | |
ba180fd4 | 363 | if (err < 0) |
5e1f65a6 JD |
364 | panic("munmap failed, errno = %d\n", |
365 | -err); | |
366 | } | |
367 | addr = last; | |
368 | continue; | |
369 | } | |
370 | ||
371 | pte = pte_offset_kernel(pmd, addr); | |
ba180fd4 | 372 | if (!pte_present(*pte) || pte_newpage(*pte)) { |
5e1f65a6 JD |
373 | updated = 1; |
374 | err = os_unmap_memory((void *) addr, | |
375 | PAGE_SIZE); | |
ba180fd4 | 376 | if (err < 0) |
5e1f65a6 JD |
377 | panic("munmap failed, errno = %d\n", |
378 | -err); | |
ba180fd4 | 379 | if (pte_present(*pte)) |
5e1f65a6 JD |
380 | map_memory(addr, |
381 | pte_val(*pte) & PAGE_MASK, | |
382 | PAGE_SIZE, 1, 1, 1); | |
383 | } | |
ba180fd4 | 384 | else if (pte_newprot(*pte)) { |
5e1f65a6 JD |
385 | updated = 1; |
386 | os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1); | |
387 | } | |
388 | addr += PAGE_SIZE; | |
389 | } | |
ba180fd4 | 390 | return updated; |
1da177e4 LT |
391 | } |
392 | ||
77bf4400 JD |
393 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) |
394 | { | |
395 | pgd_t *pgd; | |
396 | pud_t *pud; | |
397 | pmd_t *pmd; | |
398 | pte_t *pte; | |
399 | struct mm_struct *mm = vma->vm_mm; | |
400 | void *flush = NULL; | |
401 | int r, w, x, prot, err = 0; | |
402 | struct mm_id *mm_id; | |
403 | ||
404 | address &= PAGE_MASK; | |
405 | pgd = pgd_offset(mm, address); | |
ba180fd4 | 406 | if (!pgd_present(*pgd)) |
77bf4400 JD |
407 | goto kill; |
408 | ||
409 | pud = pud_offset(pgd, address); | |
ba180fd4 | 410 | if (!pud_present(*pud)) |
77bf4400 JD |
411 | goto kill; |
412 | ||
413 | pmd = pmd_offset(pud, address); | |
ba180fd4 | 414 | if (!pmd_present(*pmd)) |
77bf4400 JD |
415 | goto kill; |
416 | ||
417 | pte = pte_offset_kernel(pmd, address); | |
418 | ||
419 | r = pte_read(*pte); | |
420 | w = pte_write(*pte); | |
421 | x = pte_exec(*pte); | |
422 | if (!pte_young(*pte)) { | |
423 | r = 0; | |
424 | w = 0; | |
425 | } else if (!pte_dirty(*pte)) { | |
426 | w = 0; | |
427 | } | |
428 | ||
6c738ffa | 429 | mm_id = &mm->context.id; |
77bf4400 JD |
430 | prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | |
431 | (x ? UM_PROT_EXEC : 0)); | |
ba180fd4 JD |
432 | if (pte_newpage(*pte)) { |
433 | if (pte_present(*pte)) { | |
77bf4400 JD |
434 | unsigned long long offset; |
435 | int fd; | |
436 | ||
437 | fd = phys_mapping(pte_val(*pte) & PAGE_MASK, &offset); | |
438 | err = map(mm_id, address, PAGE_SIZE, prot, fd, offset, | |
439 | 1, &flush); | |
440 | } | |
441 | else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush); | |
442 | } | |
ba180fd4 | 443 | else if (pte_newprot(*pte)) |
77bf4400 JD |
444 | err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush); |
445 | ||
70c8205f RW |
446 | if (err) { |
447 | if (err == -ENOMEM) | |
448 | report_enomem(); | |
449 | ||
77bf4400 | 450 | goto kill; |
70c8205f | 451 | } |
77bf4400 JD |
452 | |
453 | *pte = pte_mkuptodate(*pte); | |
454 | ||
455 | return; | |
456 | ||
457 | kill: | |
ba180fd4 | 458 | printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address); |
77bf4400 JD |
459 | force_sig(SIGKILL, current); |
460 | } | |
461 | ||
1da177e4 LT |
462 | pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) |
463 | { | |
ba180fd4 | 464 | return pgd_offset(mm, address); |
1da177e4 LT |
465 | } |
466 | ||
467 | pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) | |
468 | { | |
ba180fd4 | 469 | return pud_offset(pgd, address); |
1da177e4 LT |
470 | } |
471 | ||
472 | pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) | |
473 | { | |
ba180fd4 | 474 | return pmd_offset(pud, address); |
1da177e4 LT |
475 | } |
476 | ||
477 | pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) | |
478 | { | |
ba180fd4 | 479 | return pte_offset_kernel(pmd, address); |
1da177e4 LT |
480 | } |
481 | ||
482 | pte_t *addr_pte(struct task_struct *task, unsigned long addr) | |
483 | { | |
5e1f65a6 JD |
484 | pgd_t *pgd = pgd_offset(task->mm, addr); |
485 | pud_t *pud = pud_offset(pgd, addr); | |
486 | pmd_t *pmd = pmd_offset(pud, addr); | |
1da177e4 | 487 | |
ba180fd4 | 488 | return pte_offset_map(pmd, addr); |
1da177e4 LT |
489 | } |
490 | ||
d67b569f JD |
491 | void flush_tlb_all(void) |
492 | { | |
5e1f65a6 | 493 | flush_tlb_mm(current->mm); |
d67b569f JD |
494 | } |
495 | ||
496 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
497 | { | |
6aa802ce | 498 | flush_tlb_kernel_range_common(start, end); |
d67b569f JD |
499 | } |
500 | ||
501 | void flush_tlb_kernel_vm(void) | |
502 | { | |
6aa802ce | 503 | flush_tlb_kernel_range_common(start_vm, end_vm); |
d67b569f JD |
504 | } |
505 | ||
506 | void __flush_tlb_one(unsigned long addr) | |
507 | { | |
ba180fd4 | 508 | flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE); |
77bf4400 JD |
509 | } |
510 | ||
77bf4400 JD |
511 | static void fix_range(struct mm_struct *mm, unsigned long start_addr, |
512 | unsigned long end_addr, int force) | |
513 | { | |
1466abf2 | 514 | fix_range_common(mm, start_addr, end_addr, force); |
d67b569f JD |
515 | } |
516 | ||
517 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, | |
518 | unsigned long end) | |
519 | { | |
ba180fd4 JD |
520 | if (vma->vm_mm == NULL) |
521 | flush_tlb_kernel_range_common(start, end); | |
522 | else fix_range(vma->vm_mm, start, end, 0); | |
d67b569f | 523 | } |
73395a00 | 524 | EXPORT_SYMBOL(flush_tlb_range); |
d67b569f | 525 | |
0b4e273f JD |
526 | void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, |
527 | unsigned long end) | |
d67b569f | 528 | { |
ba180fd4 JD |
529 | /* |
530 | * Don't bother flushing if this address space is about to be | |
531 | * destroyed. | |
532 | */ | |
533 | if (atomic_read(&mm->mm_users) == 0) | |
534 | return; | |
77bf4400 | 535 | |
0b4e273f JD |
536 | fix_range(mm, start, end, 0); |
537 | } | |
538 | ||
539 | void flush_tlb_mm(struct mm_struct *mm) | |
540 | { | |
541 | struct vm_area_struct *vma = mm->mmap; | |
542 | ||
543 | while (vma != NULL) { | |
544 | fix_range(mm, vma->vm_start, vma->vm_end, 0); | |
545 | vma = vma->vm_next; | |
546 | } | |
d67b569f JD |
547 | } |
548 | ||
549 | void force_flush_all(void) | |
550 | { | |
77bf4400 JD |
551 | struct mm_struct *mm = current->mm; |
552 | struct vm_area_struct *vma = mm->mmap; | |
553 | ||
ba180fd4 | 554 | while (vma != NULL) { |
77bf4400 JD |
555 | fix_range(mm, vma->vm_start, vma->vm_end, 1); |
556 | vma = vma->vm_next; | |
557 | } | |
d67b569f | 558 | } |