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> |
3f07c014 IM |
8 | #include <linux/sched/signal.h> |
9 | ||
8192ab42 JD |
10 | #include <asm/pgtable.h> |
11 | #include <asm/tlbflush.h> | |
37185b33 AV |
12 | #include <as-layout.h> |
13 | #include <mem_user.h> | |
14 | #include <os.h> | |
15 | #include <skas.h> | |
468f6597 | 16 | #include <kern_util.h> |
1da177e4 | 17 | |
1466abf2 JD |
18 | struct host_vm_change { |
19 | struct host_vm_op { | |
20 | enum { NONE, MMAP, MUNMAP, MPROTECT } type; | |
21 | union { | |
22 | struct { | |
23 | unsigned long addr; | |
24 | unsigned long len; | |
25 | unsigned int prot; | |
26 | int fd; | |
27 | __u64 offset; | |
28 | } mmap; | |
29 | struct { | |
30 | unsigned long addr; | |
31 | unsigned long len; | |
32 | } munmap; | |
33 | struct { | |
34 | unsigned long addr; | |
35 | unsigned long len; | |
36 | unsigned int prot; | |
37 | } mprotect; | |
38 | } u; | |
39 | } ops[1]; | |
40 | int index; | |
41 | struct mm_id *id; | |
42 | void *data; | |
43 | int force; | |
44 | }; | |
45 | ||
46 | #define INIT_HVC(mm, force) \ | |
47 | ((struct host_vm_change) \ | |
48 | { .ops = { { .type = NONE } }, \ | |
49 | .id = &mm->context.id, \ | |
50 | .data = NULL, \ | |
51 | .index = 0, \ | |
52 | .force = force }) | |
53 | ||
70c8205f RW |
54 | static void report_enomem(void) |
55 | { | |
56 | printk(KERN_ERR "UML ran out of memory on the host side! " | |
57 | "This can happen due to a memory limitation or " | |
58 | "vm.max_map_count has been reached.\n"); | |
59 | } | |
60 | ||
1466abf2 JD |
61 | static int do_ops(struct host_vm_change *hvc, int end, |
62 | int finished) | |
63 | { | |
64 | struct host_vm_op *op; | |
65 | int i, ret = 0; | |
66 | ||
67 | for (i = 0; i < end && !ret; i++) { | |
68 | op = &hvc->ops[i]; | |
c5d4bb17 | 69 | switch (op->type) { |
1466abf2 JD |
70 | case MMAP: |
71 | ret = map(hvc->id, op->u.mmap.addr, op->u.mmap.len, | |
72 | op->u.mmap.prot, op->u.mmap.fd, | |
73 | op->u.mmap.offset, finished, &hvc->data); | |
74 | break; | |
75 | case MUNMAP: | |
76 | ret = unmap(hvc->id, op->u.munmap.addr, | |
77 | op->u.munmap.len, finished, &hvc->data); | |
78 | break; | |
79 | case MPROTECT: | |
80 | ret = protect(hvc->id, op->u.mprotect.addr, | |
81 | op->u.mprotect.len, op->u.mprotect.prot, | |
82 | finished, &hvc->data); | |
83 | break; | |
84 | default: | |
85 | printk(KERN_ERR "Unknown op type %d in do_ops\n", | |
86 | op->type); | |
62179d47 | 87 | BUG(); |
1466abf2 JD |
88 | break; |
89 | } | |
90 | } | |
91 | ||
70c8205f RW |
92 | if (ret == -ENOMEM) |
93 | report_enomem(); | |
94 | ||
1466abf2 JD |
95 | return ret; |
96 | } | |
97 | ||
c5600490 | 98 | static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, |
1466abf2 | 99 | unsigned int prot, struct host_vm_change *hvc) |
c5600490 | 100 | { |
5e1f65a6 | 101 | __u64 offset; |
c5600490 | 102 | struct host_vm_op *last; |
07bf731e | 103 | int fd, ret = 0; |
c5600490 JD |
104 | |
105 | fd = phys_mapping(phys, &offset); | |
1466abf2 JD |
106 | if (hvc->index != 0) { |
107 | last = &hvc->ops[hvc->index - 1]; | |
ba180fd4 | 108 | if ((last->type == MMAP) && |
c5600490 | 109 | (last->u.mmap.addr + last->u.mmap.len == virt) && |
16dd07bc | 110 | (last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) && |
ba180fd4 | 111 | (last->u.mmap.offset + last->u.mmap.len == offset)) { |
c5600490 | 112 | last->u.mmap.len += len; |
07bf731e | 113 | return 0; |
c5600490 JD |
114 | } |
115 | } | |
116 | ||
1466abf2 JD |
117 | if (hvc->index == ARRAY_SIZE(hvc->ops)) { |
118 | ret = do_ops(hvc, ARRAY_SIZE(hvc->ops), 0); | |
119 | hvc->index = 0; | |
c5600490 JD |
120 | } |
121 | ||
1466abf2 JD |
122 | hvc->ops[hvc->index++] = ((struct host_vm_op) |
123 | { .type = MMAP, | |
124 | .u = { .mmap = { .addr = virt, | |
125 | .len = len, | |
126 | .prot = prot, | |
127 | .fd = fd, | |
128 | .offset = offset } | |
07bf731e BS |
129 | } }); |
130 | return ret; | |
c5600490 JD |
131 | } |
132 | ||
133 | static int add_munmap(unsigned long addr, unsigned long len, | |
1466abf2 | 134 | struct host_vm_change *hvc) |
c5600490 JD |
135 | { |
136 | struct host_vm_op *last; | |
07bf731e | 137 | int ret = 0; |
c5600490 | 138 | |
284e6d39 RW |
139 | if ((addr >= STUB_START) && (addr < STUB_END)) |
140 | return -EINVAL; | |
141 | ||
1466abf2 JD |
142 | if (hvc->index != 0) { |
143 | last = &hvc->ops[hvc->index - 1]; | |
ba180fd4 JD |
144 | if ((last->type == MUNMAP) && |
145 | (last->u.munmap.addr + last->u.mmap.len == addr)) { | |
c5600490 | 146 | last->u.munmap.len += len; |
07bf731e | 147 | return 0; |
c5600490 JD |
148 | } |
149 | } | |
150 | ||
1466abf2 JD |
151 | if (hvc->index == ARRAY_SIZE(hvc->ops)) { |
152 | ret = do_ops(hvc, ARRAY_SIZE(hvc->ops), 0); | |
153 | hvc->index = 0; | |
c5600490 JD |
154 | } |
155 | ||
1466abf2 JD |
156 | hvc->ops[hvc->index++] = ((struct host_vm_op) |
157 | { .type = MUNMAP, | |
158 | .u = { .munmap = { .addr = addr, | |
159 | .len = len } } }); | |
07bf731e | 160 | return ret; |
c5600490 JD |
161 | } |
162 | ||
16dd07bc | 163 | static int add_mprotect(unsigned long addr, unsigned long len, |
1466abf2 | 164 | unsigned int prot, struct host_vm_change *hvc) |
c5600490 JD |
165 | { |
166 | struct host_vm_op *last; | |
07bf731e | 167 | int ret = 0; |
c5600490 | 168 | |
1466abf2 JD |
169 | if (hvc->index != 0) { |
170 | last = &hvc->ops[hvc->index - 1]; | |
ba180fd4 | 171 | if ((last->type == MPROTECT) && |
c5600490 | 172 | (last->u.mprotect.addr + last->u.mprotect.len == addr) && |
ba180fd4 | 173 | (last->u.mprotect.prot == prot)) { |
c5600490 | 174 | last->u.mprotect.len += len; |
07bf731e | 175 | return 0; |
c5600490 JD |
176 | } |
177 | } | |
178 | ||
1466abf2 JD |
179 | if (hvc->index == ARRAY_SIZE(hvc->ops)) { |
180 | ret = do_ops(hvc, ARRAY_SIZE(hvc->ops), 0); | |
181 | hvc->index = 0; | |
c5600490 JD |
182 | } |
183 | ||
1466abf2 JD |
184 | hvc->ops[hvc->index++] = ((struct host_vm_op) |
185 | { .type = MPROTECT, | |
186 | .u = { .mprotect = { .addr = addr, | |
187 | .len = len, | |
188 | .prot = prot } } }); | |
07bf731e | 189 | return ret; |
c5600490 JD |
190 | } |
191 | ||
1da177e4 LT |
192 | #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1)) |
193 | ||
7f0536f8 | 194 | static inline int update_pte_range(pmd_t *pmd, unsigned long addr, |
1466abf2 JD |
195 | unsigned long end, |
196 | struct host_vm_change *hvc) | |
7f0536f8 JD |
197 | { |
198 | pte_t *pte; | |
16dd07bc | 199 | int r, w, x, prot, ret = 0; |
7f0536f8 JD |
200 | |
201 | pte = pte_offset_kernel(pmd, addr); | |
202 | do { | |
3963333f JD |
203 | if ((addr >= STUB_START) && (addr < STUB_END)) |
204 | continue; | |
205 | ||
7f0536f8 JD |
206 | r = pte_read(*pte); |
207 | w = pte_write(*pte); | |
208 | x = pte_exec(*pte); | |
209 | if (!pte_young(*pte)) { | |
210 | r = 0; | |
211 | w = 0; | |
0b4e273f | 212 | } else if (!pte_dirty(*pte)) |
7f0536f8 | 213 | w = 0; |
0b4e273f | 214 | |
16dd07bc JD |
215 | prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | |
216 | (x ? UM_PROT_EXEC : 0)); | |
1466abf2 | 217 | if (hvc->force || pte_newpage(*pte)) { |
ba180fd4 | 218 | if (pte_present(*pte)) |
7f0536f8 | 219 | ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK, |
1466abf2 | 220 | PAGE_SIZE, prot, hvc); |
0b4e273f JD |
221 | else |
222 | ret = add_munmap(addr, PAGE_SIZE, hvc); | |
223 | } else if (pte_newprot(*pte)) | |
1466abf2 | 224 | ret = add_mprotect(addr, PAGE_SIZE, prot, hvc); |
7f0536f8 | 225 | *pte = pte_mkuptodate(*pte); |
909e90d3 | 226 | } while (pte++, addr += PAGE_SIZE, ((addr < end) && !ret)); |
7f0536f8 JD |
227 | return ret; |
228 | } | |
229 | ||
230 | static inline int update_pmd_range(pud_t *pud, unsigned long addr, | |
1466abf2 JD |
231 | unsigned long end, |
232 | struct host_vm_change *hvc) | |
7f0536f8 JD |
233 | { |
234 | pmd_t *pmd; | |
235 | unsigned long next; | |
236 | int ret = 0; | |
237 | ||
238 | pmd = pmd_offset(pud, addr); | |
239 | do { | |
240 | next = pmd_addr_end(addr, end); | |
ba180fd4 | 241 | if (!pmd_present(*pmd)) { |
1466abf2 JD |
242 | if (hvc->force || pmd_newpage(*pmd)) { |
243 | ret = add_munmap(addr, next - addr, hvc); | |
7f0536f8 JD |
244 | pmd_mkuptodate(*pmd); |
245 | } | |
246 | } | |
1466abf2 | 247 | else ret = update_pte_range(pmd, addr, next, hvc); |
909e90d3 | 248 | } while (pmd++, addr = next, ((addr < end) && !ret)); |
7f0536f8 JD |
249 | return ret; |
250 | } | |
251 | ||
252 | static inline int update_pud_range(pgd_t *pgd, unsigned long addr, | |
1466abf2 JD |
253 | unsigned long end, |
254 | struct host_vm_change *hvc) | |
7f0536f8 JD |
255 | { |
256 | pud_t *pud; | |
257 | unsigned long next; | |
258 | int ret = 0; | |
259 | ||
260 | pud = pud_offset(pgd, addr); | |
261 | do { | |
262 | next = pud_addr_end(addr, end); | |
ba180fd4 | 263 | if (!pud_present(*pud)) { |
1466abf2 JD |
264 | if (hvc->force || pud_newpage(*pud)) { |
265 | ret = add_munmap(addr, next - addr, hvc); | |
7f0536f8 JD |
266 | pud_mkuptodate(*pud); |
267 | } | |
268 | } | |
1466abf2 | 269 | else ret = update_pmd_range(pud, addr, next, hvc); |
909e90d3 | 270 | } while (pud++, addr = next, ((addr < end) && !ret)); |
7f0536f8 JD |
271 | return ret; |
272 | } | |
273 | ||
1da177e4 | 274 | void fix_range_common(struct mm_struct *mm, unsigned long start_addr, |
1466abf2 | 275 | unsigned long end_addr, int force) |
1da177e4 | 276 | { |
7f0536f8 | 277 | pgd_t *pgd; |
1466abf2 | 278 | struct host_vm_change hvc; |
7f0536f8 | 279 | unsigned long addr = start_addr, next; |
1466abf2 | 280 | int ret = 0; |
1da177e4 | 281 | |
1466abf2 | 282 | hvc = INIT_HVC(mm, force); |
7f0536f8 JD |
283 | pgd = pgd_offset(mm, addr); |
284 | do { | |
285 | next = pgd_addr_end(addr, end_addr); | |
ba180fd4 JD |
286 | if (!pgd_present(*pgd)) { |
287 | if (force || pgd_newpage(*pgd)) { | |
1466abf2 | 288 | ret = add_munmap(addr, next - addr, &hvc); |
7f0536f8 | 289 | pgd_mkuptodate(*pgd); |
5e1f65a6 | 290 | } |
5e1f65a6 | 291 | } |
1466abf2 | 292 | else ret = update_pud_range(pgd, addr, next, &hvc); |
909e90d3 | 293 | } while (pgd++, addr = next, ((addr < end_addr) && !ret)); |
5e1f65a6 | 294 | |
ba180fd4 | 295 | if (!ret) |
1466abf2 | 296 | ret = do_ops(&hvc, hvc.index, 1); |
07bf731e | 297 | |
7f0536f8 | 298 | /* This is not an else because ret is modified above */ |
ba180fd4 JD |
299 | if (ret) { |
300 | printk(KERN_ERR "fix_range_common: failed, killing current " | |
468f6597 RW |
301 | "process: %d\n", task_tgid_vnr(current)); |
302 | /* We are under mmap_sem, release it such that current can terminate */ | |
303 | up_write(¤t->mm->mmap_sem); | |
07bf731e | 304 | force_sig(SIGKILL, current); |
ccaee5f8 | 305 | do_signal(¤t->thread.regs); |
07bf731e | 306 | } |
1da177e4 LT |
307 | } |
308 | ||
c75d053b | 309 | static int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) |
1da177e4 | 310 | { |
5e1f65a6 JD |
311 | struct mm_struct *mm; |
312 | pgd_t *pgd; | |
313 | pud_t *pud; | |
314 | pmd_t *pmd; | |
315 | pte_t *pte; | |
316 | unsigned long addr, last; | |
317 | int updated = 0, err; | |
318 | ||
319 | mm = &init_mm; | |
ba180fd4 | 320 | for (addr = start; addr < end;) { |
5e1f65a6 | 321 | pgd = pgd_offset(mm, addr); |
ba180fd4 | 322 | if (!pgd_present(*pgd)) { |
5e1f65a6 | 323 | last = ADD_ROUND(addr, PGDIR_SIZE); |
ba180fd4 | 324 | if (last > end) |
5e1f65a6 | 325 | last = end; |
ba180fd4 | 326 | if (pgd_newpage(*pgd)) { |
5e1f65a6 JD |
327 | updated = 1; |
328 | err = os_unmap_memory((void *) addr, | |
329 | last - addr); | |
ba180fd4 | 330 | if (err < 0) |
5e1f65a6 JD |
331 | panic("munmap failed, errno = %d\n", |
332 | -err); | |
333 | } | |
334 | addr = last; | |
335 | continue; | |
336 | } | |
337 | ||
338 | pud = pud_offset(pgd, addr); | |
ba180fd4 | 339 | if (!pud_present(*pud)) { |
5e1f65a6 | 340 | last = ADD_ROUND(addr, PUD_SIZE); |
ba180fd4 | 341 | if (last > end) |
5e1f65a6 | 342 | last = end; |
ba180fd4 | 343 | if (pud_newpage(*pud)) { |
5e1f65a6 JD |
344 | updated = 1; |
345 | err = os_unmap_memory((void *) addr, | |
346 | last - addr); | |
ba180fd4 | 347 | if (err < 0) |
5e1f65a6 JD |
348 | panic("munmap failed, errno = %d\n", |
349 | -err); | |
350 | } | |
351 | addr = last; | |
352 | continue; | |
353 | } | |
354 | ||
355 | pmd = pmd_offset(pud, addr); | |
ba180fd4 | 356 | if (!pmd_present(*pmd)) { |
5e1f65a6 | 357 | last = ADD_ROUND(addr, PMD_SIZE); |
ba180fd4 | 358 | if (last > end) |
5e1f65a6 | 359 | last = end; |
ba180fd4 | 360 | if (pmd_newpage(*pmd)) { |
5e1f65a6 JD |
361 | updated = 1; |
362 | err = os_unmap_memory((void *) addr, | |
363 | last - addr); | |
ba180fd4 | 364 | if (err < 0) |
5e1f65a6 JD |
365 | panic("munmap failed, errno = %d\n", |
366 | -err); | |
367 | } | |
368 | addr = last; | |
369 | continue; | |
370 | } | |
371 | ||
372 | pte = pte_offset_kernel(pmd, addr); | |
ba180fd4 | 373 | if (!pte_present(*pte) || pte_newpage(*pte)) { |
5e1f65a6 JD |
374 | updated = 1; |
375 | err = os_unmap_memory((void *) addr, | |
376 | PAGE_SIZE); | |
ba180fd4 | 377 | if (err < 0) |
5e1f65a6 JD |
378 | panic("munmap failed, errno = %d\n", |
379 | -err); | |
ba180fd4 | 380 | if (pte_present(*pte)) |
5e1f65a6 JD |
381 | map_memory(addr, |
382 | pte_val(*pte) & PAGE_MASK, | |
383 | PAGE_SIZE, 1, 1, 1); | |
384 | } | |
ba180fd4 | 385 | else if (pte_newprot(*pte)) { |
5e1f65a6 JD |
386 | updated = 1; |
387 | os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1); | |
388 | } | |
389 | addr += PAGE_SIZE; | |
390 | } | |
ba180fd4 | 391 | return updated; |
1da177e4 LT |
392 | } |
393 | ||
77bf4400 JD |
394 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) |
395 | { | |
396 | pgd_t *pgd; | |
397 | pud_t *pud; | |
398 | pmd_t *pmd; | |
399 | pte_t *pte; | |
400 | struct mm_struct *mm = vma->vm_mm; | |
401 | void *flush = NULL; | |
402 | int r, w, x, prot, err = 0; | |
403 | struct mm_id *mm_id; | |
404 | ||
405 | address &= PAGE_MASK; | |
406 | pgd = pgd_offset(mm, address); | |
ba180fd4 | 407 | if (!pgd_present(*pgd)) |
77bf4400 JD |
408 | goto kill; |
409 | ||
410 | pud = pud_offset(pgd, address); | |
ba180fd4 | 411 | if (!pud_present(*pud)) |
77bf4400 JD |
412 | goto kill; |
413 | ||
414 | pmd = pmd_offset(pud, address); | |
ba180fd4 | 415 | if (!pmd_present(*pmd)) |
77bf4400 JD |
416 | goto kill; |
417 | ||
418 | pte = pte_offset_kernel(pmd, address); | |
419 | ||
420 | r = pte_read(*pte); | |
421 | w = pte_write(*pte); | |
422 | x = pte_exec(*pte); | |
423 | if (!pte_young(*pte)) { | |
424 | r = 0; | |
425 | w = 0; | |
426 | } else if (!pte_dirty(*pte)) { | |
427 | w = 0; | |
428 | } | |
429 | ||
6c738ffa | 430 | mm_id = &mm->context.id; |
77bf4400 JD |
431 | prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | |
432 | (x ? UM_PROT_EXEC : 0)); | |
ba180fd4 JD |
433 | if (pte_newpage(*pte)) { |
434 | if (pte_present(*pte)) { | |
77bf4400 JD |
435 | unsigned long long offset; |
436 | int fd; | |
437 | ||
438 | fd = phys_mapping(pte_val(*pte) & PAGE_MASK, &offset); | |
439 | err = map(mm_id, address, PAGE_SIZE, prot, fd, offset, | |
440 | 1, &flush); | |
441 | } | |
442 | else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush); | |
443 | } | |
ba180fd4 | 444 | else if (pte_newprot(*pte)) |
77bf4400 JD |
445 | err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush); |
446 | ||
70c8205f RW |
447 | if (err) { |
448 | if (err == -ENOMEM) | |
449 | report_enomem(); | |
450 | ||
77bf4400 | 451 | goto kill; |
70c8205f | 452 | } |
77bf4400 JD |
453 | |
454 | *pte = pte_mkuptodate(*pte); | |
455 | ||
456 | return; | |
457 | ||
458 | kill: | |
ba180fd4 | 459 | printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address); |
77bf4400 JD |
460 | force_sig(SIGKILL, current); |
461 | } | |
462 | ||
1da177e4 LT |
463 | pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) |
464 | { | |
ba180fd4 | 465 | return pgd_offset(mm, address); |
1da177e4 LT |
466 | } |
467 | ||
468 | pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) | |
469 | { | |
ba180fd4 | 470 | return pud_offset(pgd, address); |
1da177e4 LT |
471 | } |
472 | ||
473 | pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) | |
474 | { | |
ba180fd4 | 475 | return pmd_offset(pud, address); |
1da177e4 LT |
476 | } |
477 | ||
478 | pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) | |
479 | { | |
ba180fd4 | 480 | return pte_offset_kernel(pmd, address); |
1da177e4 LT |
481 | } |
482 | ||
483 | pte_t *addr_pte(struct task_struct *task, unsigned long addr) | |
484 | { | |
5e1f65a6 JD |
485 | pgd_t *pgd = pgd_offset(task->mm, addr); |
486 | pud_t *pud = pud_offset(pgd, addr); | |
487 | pmd_t *pmd = pmd_offset(pud, addr); | |
1da177e4 | 488 | |
ba180fd4 | 489 | return pte_offset_map(pmd, addr); |
1da177e4 LT |
490 | } |
491 | ||
d67b569f JD |
492 | void flush_tlb_all(void) |
493 | { | |
5e1f65a6 | 494 | flush_tlb_mm(current->mm); |
d67b569f JD |
495 | } |
496 | ||
497 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
498 | { | |
6aa802ce | 499 | flush_tlb_kernel_range_common(start, end); |
d67b569f JD |
500 | } |
501 | ||
502 | void flush_tlb_kernel_vm(void) | |
503 | { | |
6aa802ce | 504 | flush_tlb_kernel_range_common(start_vm, end_vm); |
d67b569f JD |
505 | } |
506 | ||
507 | void __flush_tlb_one(unsigned long addr) | |
508 | { | |
ba180fd4 | 509 | flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE); |
77bf4400 JD |
510 | } |
511 | ||
77bf4400 JD |
512 | static void fix_range(struct mm_struct *mm, unsigned long start_addr, |
513 | unsigned long end_addr, int force) | |
514 | { | |
1466abf2 | 515 | fix_range_common(mm, start_addr, end_addr, force); |
d67b569f JD |
516 | } |
517 | ||
518 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, | |
519 | unsigned long end) | |
520 | { | |
ba180fd4 JD |
521 | if (vma->vm_mm == NULL) |
522 | flush_tlb_kernel_range_common(start, end); | |
523 | else fix_range(vma->vm_mm, start, end, 0); | |
d67b569f | 524 | } |
73395a00 | 525 | EXPORT_SYMBOL(flush_tlb_range); |
d67b569f | 526 | |
0b4e273f JD |
527 | void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, |
528 | unsigned long end) | |
d67b569f | 529 | { |
ba180fd4 JD |
530 | /* |
531 | * Don't bother flushing if this address space is about to be | |
532 | * destroyed. | |
533 | */ | |
534 | if (atomic_read(&mm->mm_users) == 0) | |
535 | return; | |
77bf4400 | 536 | |
0b4e273f JD |
537 | fix_range(mm, start, end, 0); |
538 | } | |
539 | ||
540 | void flush_tlb_mm(struct mm_struct *mm) | |
541 | { | |
542 | struct vm_area_struct *vma = mm->mmap; | |
543 | ||
544 | while (vma != NULL) { | |
545 | fix_range(mm, vma->vm_start, vma->vm_end, 0); | |
546 | vma = vma->vm_next; | |
547 | } | |
d67b569f JD |
548 | } |
549 | ||
550 | void force_flush_all(void) | |
551 | { | |
77bf4400 JD |
552 | struct mm_struct *mm = current->mm; |
553 | struct vm_area_struct *vma = mm->mmap; | |
554 | ||
ba180fd4 | 555 | while (vma != NULL) { |
77bf4400 JD |
556 | fix_range(mm, vma->vm_start, vma->vm_end, 1); |
557 | vma = vma->vm_next; | |
558 | } | |
d67b569f | 559 | } |