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