Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #include "linux/mm.h" |
| 7 | #include "asm/page.h" |
| 8 | #include "asm/pgalloc.h" |
| 9 | #include "asm/tlbflush.h" |
| 10 | #include "choose-mode.h" |
| 11 | #include "mode_kern.h" |
| 12 | #include "user_util.h" |
| 13 | #include "tlb.h" |
| 14 | #include "mem.h" |
| 15 | #include "mem_user.h" |
| 16 | #include "os.h" |
| 17 | |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 18 | static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 19 | int r, int w, int x, struct host_vm_op *ops, int *index, |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 20 | int last_filled, union mm_context *mmu, void **flush, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 21 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 22 | int, int, void **)) |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 23 | { |
| 24 | __u64 offset; |
| 25 | struct host_vm_op *last; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 26 | int fd, ret = 0; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 27 | |
| 28 | fd = phys_mapping(phys, &offset); |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 29 | if(*index != -1){ |
| 30 | last = &ops[*index]; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 31 | if((last->type == MMAP) && |
| 32 | (last->u.mmap.addr + last->u.mmap.len == virt) && |
| 33 | (last->u.mmap.r == r) && (last->u.mmap.w == w) && |
| 34 | (last->u.mmap.x == x) && (last->u.mmap.fd == fd) && |
| 35 | (last->u.mmap.offset + last->u.mmap.len == offset)){ |
| 36 | last->u.mmap.len += len; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 37 | return 0; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 38 | } |
| 39 | } |
| 40 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 41 | if(*index == last_filled){ |
| 42 | ret = (*do_ops)(mmu, ops, last_filled, 0, flush); |
| 43 | *index = -1; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 44 | } |
| 45 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 46 | ops[++*index] = ((struct host_vm_op) { .type = MMAP, |
| 47 | .u = { .mmap = { |
| 48 | .addr = virt, |
| 49 | .len = len, |
| 50 | .r = r, |
| 51 | .w = w, |
| 52 | .x = x, |
| 53 | .fd = fd, |
| 54 | .offset = offset } |
| 55 | } }); |
| 56 | return ret; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | static int add_munmap(unsigned long addr, unsigned long len, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 60 | struct host_vm_op *ops, int *index, int last_filled, |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 61 | union mm_context *mmu, void **flush, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 62 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 63 | int, int, void **)) |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 64 | { |
| 65 | struct host_vm_op *last; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 66 | int ret = 0; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 67 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 68 | if(*index != -1){ |
| 69 | last = &ops[*index]; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 70 | if((last->type == MUNMAP) && |
| 71 | (last->u.munmap.addr + last->u.mmap.len == addr)){ |
| 72 | last->u.munmap.len += len; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 73 | return 0; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 74 | } |
| 75 | } |
| 76 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 77 | if(*index == last_filled){ |
| 78 | ret = (*do_ops)(mmu, ops, last_filled, 0, flush); |
| 79 | *index = -1; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 80 | } |
| 81 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 82 | ops[++*index] = ((struct host_vm_op) { .type = MUNMAP, |
| 83 | .u = { .munmap = { |
| 84 | .addr = addr, |
| 85 | .len = len } } }); |
| 86 | return ret; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | static int add_mprotect(unsigned long addr, unsigned long len, int r, int w, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 90 | int x, struct host_vm_op *ops, int *index, |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 91 | int last_filled, union mm_context *mmu, void **flush, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 92 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 93 | int, int, void **)) |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 94 | { |
| 95 | struct host_vm_op *last; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 96 | int ret = 0; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 97 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 98 | if(*index != -1){ |
| 99 | last = &ops[*index]; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 100 | if((last->type == MPROTECT) && |
| 101 | (last->u.mprotect.addr + last->u.mprotect.len == addr) && |
| 102 | (last->u.mprotect.r == r) && (last->u.mprotect.w == w) && |
| 103 | (last->u.mprotect.x == x)){ |
| 104 | last->u.mprotect.len += len; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 105 | return 0; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 106 | } |
| 107 | } |
| 108 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 109 | if(*index == last_filled){ |
| 110 | ret = (*do_ops)(mmu, ops, last_filled, 0, flush); |
| 111 | *index = -1; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 112 | } |
| 113 | |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 114 | ops[++*index] = ((struct host_vm_op) { .type = MPROTECT, |
| 115 | .u = { .mprotect = { |
| 116 | .addr = addr, |
| 117 | .len = len, |
| 118 | .r = r, |
| 119 | .w = w, |
| 120 | .x = x } } }); |
| 121 | return ret; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1)) |
| 125 | |
| 126 | void fix_range_common(struct mm_struct *mm, unsigned long start_addr, |
Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 127 | unsigned long end_addr, int force, |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 128 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 129 | int, int, void **)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
| 131 | pgd_t *npgd; |
| 132 | pud_t *npud; |
| 133 | pmd_t *npmd; |
| 134 | pte_t *npte; |
Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 135 | union mm_context *mmu = &mm->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | unsigned long addr, end; |
| 137 | int r, w, x; |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 138 | struct host_vm_op ops[1]; |
| 139 | void *flush = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | int op_index = -1, last_op = sizeof(ops) / sizeof(ops[0]) - 1; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 141 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | if(mm == NULL) return; |
| 144 | |
Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 145 | ops[0].type = NONE; |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 146 | for(addr = start_addr; addr < end_addr && !ret;){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | npgd = pgd_offset(mm, addr); |
| 148 | if(!pgd_present(*npgd)){ |
| 149 | end = ADD_ROUND(addr, PGDIR_SIZE); |
| 150 | if(end > end_addr) |
| 151 | end = end_addr; |
| 152 | if(force || pgd_newpage(*npgd)){ |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 153 | ret = add_munmap(addr, end - addr, ops, |
| 154 | &op_index, last_op, mmu, |
| 155 | &flush, do_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | pgd_mkuptodate(*npgd); |
| 157 | } |
| 158 | addr = end; |
| 159 | continue; |
| 160 | } |
| 161 | |
| 162 | npud = pud_offset(npgd, addr); |
| 163 | if(!pud_present(*npud)){ |
| 164 | end = ADD_ROUND(addr, PUD_SIZE); |
| 165 | if(end > end_addr) |
| 166 | end = end_addr; |
| 167 | if(force || pud_newpage(*npud)){ |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 168 | ret = add_munmap(addr, end - addr, ops, |
| 169 | &op_index, last_op, mmu, |
| 170 | &flush, do_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | pud_mkuptodate(*npud); |
| 172 | } |
| 173 | addr = end; |
| 174 | continue; |
| 175 | } |
| 176 | |
| 177 | npmd = pmd_offset(npud, addr); |
| 178 | if(!pmd_present(*npmd)){ |
| 179 | end = ADD_ROUND(addr, PMD_SIZE); |
| 180 | if(end > end_addr) |
| 181 | end = end_addr; |
| 182 | if(force || pmd_newpage(*npmd)){ |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 183 | ret = add_munmap(addr, end - addr, ops, |
| 184 | &op_index, last_op, mmu, |
| 185 | &flush, do_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | pmd_mkuptodate(*npmd); |
| 187 | } |
| 188 | addr = end; |
| 189 | continue; |
| 190 | } |
| 191 | |
| 192 | npte = pte_offset_kernel(npmd, addr); |
| 193 | r = pte_read(*npte); |
| 194 | w = pte_write(*npte); |
| 195 | x = pte_exec(*npte); |
| 196 | if(!pte_dirty(*npte)) |
| 197 | w = 0; |
| 198 | if(!pte_young(*npte)){ |
| 199 | r = 0; |
| 200 | w = 0; |
| 201 | } |
| 202 | if(force || pte_newpage(*npte)){ |
| 203 | if(pte_present(*npte)) |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 204 | ret = add_mmap(addr, |
| 205 | pte_val(*npte) & PAGE_MASK, |
| 206 | PAGE_SIZE, r, w, x, ops, |
| 207 | &op_index, last_op, mmu, |
| 208 | &flush, do_ops); |
| 209 | else ret = add_munmap(addr, PAGE_SIZE, ops, |
| 210 | &op_index, last_op, mmu, |
| 211 | &flush, do_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | else if(pte_newprot(*npte)) |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 214 | ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops, |
| 215 | &op_index, last_op, mmu, |
| 216 | &flush, do_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | *npte = pte_mkuptodate(*npte); |
| 219 | addr += PAGE_SIZE; |
| 220 | } |
Bodo Stroesser | 07bf731 | 2005-09-03 15:57:50 -0700 | [diff] [blame] | 221 | |
| 222 | if(!ret) |
| 223 | ret = (*do_ops)(mmu, ops, op_index, 1, &flush); |
| 224 | |
| 225 | /* This is not an else because ret is modified above */ |
| 226 | if(ret) { |
| 227 | printk("fix_range_common: failed, killing current process\n"); |
| 228 | force_sig(SIGKILL, current); |
| 229 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) |
| 233 | { |
| 234 | struct mm_struct *mm; |
| 235 | pgd_t *pgd; |
| 236 | pud_t *pud; |
| 237 | pmd_t *pmd; |
| 238 | pte_t *pte; |
| 239 | unsigned long addr, last; |
| 240 | int updated = 0, err; |
| 241 | |
| 242 | mm = &init_mm; |
| 243 | for(addr = start; addr < end;){ |
| 244 | pgd = pgd_offset(mm, addr); |
| 245 | if(!pgd_present(*pgd)){ |
| 246 | last = ADD_ROUND(addr, PGDIR_SIZE); |
| 247 | if(last > end) |
| 248 | last = end; |
| 249 | if(pgd_newpage(*pgd)){ |
| 250 | updated = 1; |
| 251 | err = os_unmap_memory((void *) addr, |
| 252 | last - addr); |
| 253 | if(err < 0) |
| 254 | panic("munmap failed, errno = %d\n", |
| 255 | -err); |
| 256 | } |
| 257 | addr = last; |
| 258 | continue; |
| 259 | } |
| 260 | |
| 261 | pud = pud_offset(pgd, addr); |
| 262 | if(!pud_present(*pud)){ |
| 263 | last = ADD_ROUND(addr, PUD_SIZE); |
| 264 | if(last > end) |
| 265 | last = end; |
| 266 | if(pud_newpage(*pud)){ |
| 267 | updated = 1; |
| 268 | err = os_unmap_memory((void *) addr, |
| 269 | last - addr); |
| 270 | if(err < 0) |
| 271 | panic("munmap failed, errno = %d\n", |
| 272 | -err); |
| 273 | } |
| 274 | addr = last; |
| 275 | continue; |
| 276 | } |
| 277 | |
| 278 | pmd = pmd_offset(pud, addr); |
| 279 | if(!pmd_present(*pmd)){ |
| 280 | last = ADD_ROUND(addr, PMD_SIZE); |
| 281 | if(last > end) |
| 282 | last = end; |
| 283 | if(pmd_newpage(*pmd)){ |
| 284 | updated = 1; |
| 285 | err = os_unmap_memory((void *) addr, |
| 286 | last - addr); |
| 287 | if(err < 0) |
| 288 | panic("munmap failed, errno = %d\n", |
| 289 | -err); |
| 290 | } |
| 291 | addr = last; |
| 292 | continue; |
| 293 | } |
| 294 | |
| 295 | pte = pte_offset_kernel(pmd, addr); |
| 296 | if(!pte_present(*pte) || pte_newpage(*pte)){ |
| 297 | updated = 1; |
| 298 | err = os_unmap_memory((void *) addr, |
| 299 | PAGE_SIZE); |
| 300 | if(err < 0) |
| 301 | panic("munmap failed, errno = %d\n", |
| 302 | -err); |
| 303 | if(pte_present(*pte)) |
| 304 | map_memory(addr, |
| 305 | pte_val(*pte) & PAGE_MASK, |
| 306 | PAGE_SIZE, 1, 1, 1); |
| 307 | } |
| 308 | else if(pte_newprot(*pte)){ |
| 309 | updated = 1; |
| 310 | protect_memory(addr, PAGE_SIZE, 1, 1, 1, 1); |
| 311 | } |
| 312 | addr += PAGE_SIZE; |
| 313 | } |
| 314 | return(updated); |
| 315 | } |
| 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) |
| 318 | { |
| 319 | return(pgd_offset(mm, address)); |
| 320 | } |
| 321 | |
| 322 | pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) |
| 323 | { |
| 324 | return(pud_offset(pgd, address)); |
| 325 | } |
| 326 | |
| 327 | pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) |
| 328 | { |
| 329 | return(pmd_offset(pud, address)); |
| 330 | } |
| 331 | |
| 332 | pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) |
| 333 | { |
| 334 | return(pte_offset_kernel(pmd, address)); |
| 335 | } |
| 336 | |
| 337 | pte_t *addr_pte(struct task_struct *task, unsigned long addr) |
| 338 | { |
| 339 | pgd_t *pgd = pgd_offset(task->mm, addr); |
| 340 | pud_t *pud = pud_offset(pgd, addr); |
| 341 | pmd_t *pmd = pmd_offset(pud, addr); |
| 342 | |
| 343 | return(pte_offset_map(pmd, addr)); |
| 344 | } |
| 345 | |
Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 346 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) |
| 347 | { |
| 348 | address &= PAGE_MASK; |
| 349 | flush_tlb_range(vma, address, address + PAGE_SIZE); |
| 350 | } |
| 351 | |
| 352 | void flush_tlb_all(void) |
| 353 | { |
| 354 | flush_tlb_mm(current->mm); |
| 355 | } |
| 356 | |
| 357 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) |
| 358 | { |
| 359 | CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt, |
| 360 | flush_tlb_kernel_range_common, start, end); |
| 361 | } |
| 362 | |
| 363 | void flush_tlb_kernel_vm(void) |
| 364 | { |
| 365 | CHOOSE_MODE(flush_tlb_kernel_vm_tt(), |
| 366 | flush_tlb_kernel_range_common(start_vm, end_vm)); |
| 367 | } |
| 368 | |
| 369 | void __flush_tlb_one(unsigned long addr) |
| 370 | { |
| 371 | CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr); |
| 372 | } |
| 373 | |
| 374 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, |
| 375 | unsigned long end) |
| 376 | { |
| 377 | CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start, |
| 378 | end); |
| 379 | } |
| 380 | |
| 381 | void flush_tlb_mm(struct mm_struct *mm) |
| 382 | { |
| 383 | CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm); |
| 384 | } |
| 385 | |
| 386 | void force_flush_all(void) |
| 387 | { |
| 388 | CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas()); |
| 389 | } |
| 390 | |