diff options
Diffstat (limited to 'arch/um/kernel/tlb.c')
| -rw-r--r-- | arch/um/kernel/tlb.c | 370 |
1 files changed, 185 insertions, 185 deletions
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index f5b0636f9ad7..54a5ff25645a 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c | |||
| @@ -1,4 +1,4 @@ | |||
| 1 | /* | 1 | /* |
| 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) | 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL | 3 | * Licensed under the GPL |
| 4 | */ | 4 | */ |
| @@ -16,12 +16,12 @@ | |||
| 16 | #include "os.h" | 16 | #include "os.h" |
| 17 | 17 | ||
| 18 | static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, | 18 | static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, |
| 19 | int r, int w, int x, struct host_vm_op *ops, int *index, | 19 | int r, int w, int x, struct host_vm_op *ops, int *index, |
| 20 | int last_filled, union mm_context *mmu, void **flush, | 20 | int last_filled, union mm_context *mmu, void **flush, |
| 21 | int (*do_ops)(union mm_context *, struct host_vm_op *, | 21 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 22 | int, int, void **)) | 22 | int, int, void **)) |
| 23 | { | 23 | { |
| 24 | __u64 offset; | 24 | __u64 offset; |
| 25 | struct host_vm_op *last; | 25 | struct host_vm_op *last; |
| 26 | int fd, ret = 0; | 26 | int fd, ret = 0; |
| 27 | 27 | ||
| @@ -89,7 +89,7 @@ static int add_munmap(unsigned long addr, unsigned long len, | |||
| 89 | static int add_mprotect(unsigned long addr, unsigned long len, int r, int w, | 89 | static int add_mprotect(unsigned long addr, unsigned long len, int r, int w, |
| 90 | int x, struct host_vm_op *ops, int *index, | 90 | int x, struct host_vm_op *ops, int *index, |
| 91 | int last_filled, union mm_context *mmu, void **flush, | 91 | int last_filled, union mm_context *mmu, void **flush, |
| 92 | int (*do_ops)(union mm_context *, struct host_vm_op *, | 92 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 93 | int, int, void **)) | 93 | int, int, void **)) |
| 94 | { | 94 | { |
| 95 | struct host_vm_op *last; | 95 | struct host_vm_op *last; |
| @@ -124,105 +124,105 @@ static int add_mprotect(unsigned long addr, unsigned long len, int r, int w, | |||
| 124 | #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1)) | 124 | #define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1)) |
| 125 | 125 | ||
| 126 | void fix_range_common(struct mm_struct *mm, unsigned long start_addr, | 126 | void fix_range_common(struct mm_struct *mm, unsigned long start_addr, |
| 127 | unsigned long end_addr, int force, | 127 | unsigned long end_addr, int force, |
| 128 | int (*do_ops)(union mm_context *, struct host_vm_op *, | 128 | int (*do_ops)(union mm_context *, struct host_vm_op *, |
| 129 | int, int, void **)) | 129 | int, int, void **)) |
| 130 | { | 130 | { |
| 131 | pgd_t *npgd; | 131 | pgd_t *npgd; |
| 132 | pud_t *npud; | 132 | pud_t *npud; |
| 133 | pmd_t *npmd; | 133 | pmd_t *npmd; |
| 134 | pte_t *npte; | 134 | pte_t *npte; |
| 135 | union mm_context *mmu = &mm->context; | 135 | union mm_context *mmu = &mm->context; |
| 136 | unsigned long addr, end; | 136 | unsigned long addr, end; |
| 137 | int r, w, x; | 137 | int r, w, x; |
| 138 | struct host_vm_op ops[1]; | 138 | struct host_vm_op ops[1]; |
| 139 | void *flush = NULL; | 139 | void *flush = NULL; |
| 140 | int op_index = -1, last_op = sizeof(ops) / sizeof(ops[0]) - 1; | 140 | int op_index = -1, last_op = ARRAY_SIZE(ops) - 1; |
| 141 | int ret = 0; | 141 | int ret = 0; |
| 142 | 142 | ||
| 143 | if(mm == NULL) return; | 143 | if(mm == NULL) |
| 144 | 144 | return; | |
| 145 | ops[0].type = NONE; | 145 | |
| 146 | for(addr = start_addr; addr < end_addr && !ret;){ | 146 | ops[0].type = NONE; |
| 147 | npgd = pgd_offset(mm, addr); | 147 | for(addr = start_addr; addr < end_addr && !ret;){ |
| 148 | if(!pgd_present(*npgd)){ | 148 | npgd = pgd_offset(mm, addr); |
| 149 | end = ADD_ROUND(addr, PGDIR_SIZE); | 149 | if(!pgd_present(*npgd)){ |
| 150 | if(end > end_addr) | 150 | end = ADD_ROUND(addr, PGDIR_SIZE); |
| 151 | end = end_addr; | 151 | if(end > end_addr) |
| 152 | if(force || pgd_newpage(*npgd)){ | 152 | end = end_addr; |
| 153 | ret = add_munmap(addr, end - addr, ops, | 153 | if(force || pgd_newpage(*npgd)){ |
| 154 | &op_index, last_op, mmu, | 154 | ret = add_munmap(addr, end - addr, ops, |
| 155 | &flush, do_ops); | 155 | &op_index, last_op, mmu, |
| 156 | pgd_mkuptodate(*npgd); | 156 | &flush, do_ops); |
| 157 | } | 157 | pgd_mkuptodate(*npgd); |
| 158 | addr = end; | 158 | } |
| 159 | continue; | 159 | addr = end; |
| 160 | } | 160 | continue; |
| 161 | 161 | } | |
| 162 | npud = pud_offset(npgd, addr); | 162 | |
| 163 | if(!pud_present(*npud)){ | 163 | npud = pud_offset(npgd, addr); |
| 164 | end = ADD_ROUND(addr, PUD_SIZE); | 164 | if(!pud_present(*npud)){ |
| 165 | if(end > end_addr) | 165 | end = ADD_ROUND(addr, PUD_SIZE); |
| 166 | end = end_addr; | 166 | if(end > end_addr) |
| 167 | if(force || pud_newpage(*npud)){ | 167 | end = end_addr; |
| 168 | ret = add_munmap(addr, end - addr, ops, | 168 | if(force || pud_newpage(*npud)){ |
| 169 | &op_index, last_op, mmu, | 169 | ret = add_munmap(addr, end - addr, ops, |
| 170 | &flush, do_ops); | 170 | &op_index, last_op, mmu, |
| 171 | pud_mkuptodate(*npud); | 171 | &flush, do_ops); |
| 172 | } | 172 | pud_mkuptodate(*npud); |
| 173 | addr = end; | 173 | } |
| 174 | continue; | 174 | addr = end; |
| 175 | } | 175 | continue; |
| 176 | 176 | } | |
| 177 | npmd = pmd_offset(npud, addr); | 177 | |
| 178 | if(!pmd_present(*npmd)){ | 178 | npmd = pmd_offset(npud, addr); |
| 179 | end = ADD_ROUND(addr, PMD_SIZE); | 179 | if(!pmd_present(*npmd)){ |
| 180 | if(end > end_addr) | 180 | end = ADD_ROUND(addr, PMD_SIZE); |
| 181 | end = end_addr; | 181 | if(end > end_addr) |
| 182 | if(force || pmd_newpage(*npmd)){ | 182 | end = end_addr; |
| 183 | ret = add_munmap(addr, end - addr, ops, | 183 | if(force || pmd_newpage(*npmd)){ |
| 184 | &op_index, last_op, mmu, | 184 | ret = add_munmap(addr, end - addr, ops, |
| 185 | &flush, do_ops); | 185 | &op_index, last_op, mmu, |
| 186 | pmd_mkuptodate(*npmd); | 186 | &flush, do_ops); |
| 187 | } | 187 | pmd_mkuptodate(*npmd); |
| 188 | addr = end; | 188 | } |
| 189 | continue; | 189 | addr = end; |
| 190 | } | 190 | continue; |
| 191 | 191 | } | |
| 192 | npte = pte_offset_kernel(npmd, addr); | 192 | |
| 193 | r = pte_read(*npte); | 193 | npte = pte_offset_kernel(npmd, addr); |
| 194 | w = pte_write(*npte); | 194 | r = pte_read(*npte); |
| 195 | x = pte_exec(*npte); | 195 | w = pte_write(*npte); |
| 196 | x = pte_exec(*npte); | ||
| 196 | if (!pte_young(*npte)) { | 197 | if (!pte_young(*npte)) { |
| 197 | r = 0; | 198 | r = 0; |
| 198 | w = 0; | 199 | w = 0; |
| 199 | } else if (!pte_dirty(*npte)) { | 200 | } else if (!pte_dirty(*npte)) { |
| 200 | w = 0; | 201 | w = 0; |
| 201 | } | 202 | } |
| 202 | if(force || pte_newpage(*npte)){ | 203 | if(force || pte_newpage(*npte)){ |
| 203 | if(pte_present(*npte)) | 204 | if(pte_present(*npte)) |
| 204 | ret = add_mmap(addr, | 205 | ret = add_mmap(addr, |
| 205 | pte_val(*npte) & PAGE_MASK, | 206 | pte_val(*npte) & PAGE_MASK, |
| 206 | PAGE_SIZE, r, w, x, ops, | 207 | PAGE_SIZE, r, w, x, ops, |
| 207 | &op_index, last_op, mmu, | 208 | &op_index, last_op, mmu, |
| 208 | &flush, do_ops); | 209 | &flush, do_ops); |
| 209 | else ret = add_munmap(addr, PAGE_SIZE, ops, | 210 | else ret = add_munmap(addr, PAGE_SIZE, ops, |
| 210 | &op_index, last_op, mmu, | 211 | &op_index, last_op, mmu, |
| 211 | &flush, do_ops); | 212 | &flush, do_ops); |
| 212 | } | 213 | } |
| 213 | else if(pte_newprot(*npte)) | 214 | else if(pte_newprot(*npte)) |
| 214 | ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops, | 215 | ret = add_mprotect(addr, PAGE_SIZE, r, w, x, ops, |
| 215 | &op_index, last_op, mmu, | 216 | &op_index, last_op, mmu, |
| 216 | &flush, do_ops); | 217 | &flush, do_ops); |
| 217 | 218 | ||
| 218 | *npte = pte_mkuptodate(*npte); | 219 | *npte = pte_mkuptodate(*npte); |
| 219 | addr += PAGE_SIZE; | 220 | addr += PAGE_SIZE; |
| 220 | } | 221 | } |
| 221 | |||
| 222 | if(!ret) | 222 | if(!ret) |
| 223 | ret = (*do_ops)(mmu, ops, op_index, 1, &flush); | 223 | ret = (*do_ops)(mmu, ops, op_index, 1, &flush); |
| 224 | 224 | ||
| 225 | /* This is not an else because ret is modified above */ | 225 | /* This is not an else because ret is modified above */ |
| 226 | if(ret) { | 226 | if(ret) { |
| 227 | printk("fix_range_common: failed, killing current process\n"); | 227 | printk("fix_range_common: failed, killing current process\n"); |
| 228 | force_sig(SIGKILL, current); | 228 | force_sig(SIGKILL, current); |
| @@ -231,160 +231,160 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr, | |||
| 231 | 231 | ||
| 232 | int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) | 232 | int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) |
| 233 | { | 233 | { |
| 234 | struct mm_struct *mm; | 234 | struct mm_struct *mm; |
| 235 | pgd_t *pgd; | 235 | pgd_t *pgd; |
| 236 | pud_t *pud; | 236 | pud_t *pud; |
| 237 | pmd_t *pmd; | 237 | pmd_t *pmd; |
| 238 | pte_t *pte; | 238 | pte_t *pte; |
| 239 | unsigned long addr, last; | 239 | unsigned long addr, last; |
| 240 | int updated = 0, err; | 240 | int updated = 0, err; |
| 241 | 241 | ||
| 242 | mm = &init_mm; | 242 | mm = &init_mm; |
| 243 | for(addr = start; addr < end;){ | 243 | for(addr = start; addr < end;){ |
| 244 | pgd = pgd_offset(mm, addr); | 244 | pgd = pgd_offset(mm, addr); |
| 245 | if(!pgd_present(*pgd)){ | 245 | if(!pgd_present(*pgd)){ |
| 246 | last = ADD_ROUND(addr, PGDIR_SIZE); | 246 | last = ADD_ROUND(addr, PGDIR_SIZE); |
| 247 | if(last > end) | 247 | if(last > end) |
| 248 | last = end; | 248 | last = end; |
| 249 | if(pgd_newpage(*pgd)){ | 249 | if(pgd_newpage(*pgd)){ |
| 250 | updated = 1; | 250 | updated = 1; |
| 251 | err = os_unmap_memory((void *) addr, | 251 | err = os_unmap_memory((void *) addr, |
| 252 | last - addr); | 252 | last - addr); |
| 253 | if(err < 0) | 253 | if(err < 0) |
| 254 | panic("munmap failed, errno = %d\n", | 254 | panic("munmap failed, errno = %d\n", |
| 255 | -err); | 255 | -err); |
| 256 | } | 256 | } |
| 257 | addr = last; | 257 | addr = last; |
| 258 | continue; | 258 | continue; |
| 259 | } | 259 | } |
| 260 | 260 | ||
| 261 | pud = pud_offset(pgd, addr); | 261 | pud = pud_offset(pgd, addr); |
| 262 | if(!pud_present(*pud)){ | 262 | if(!pud_present(*pud)){ |
| 263 | last = ADD_ROUND(addr, PUD_SIZE); | 263 | last = ADD_ROUND(addr, PUD_SIZE); |
| 264 | if(last > end) | 264 | if(last > end) |
| 265 | last = end; | 265 | last = end; |
| 266 | if(pud_newpage(*pud)){ | 266 | if(pud_newpage(*pud)){ |
| 267 | updated = 1; | 267 | updated = 1; |
| 268 | err = os_unmap_memory((void *) addr, | 268 | err = os_unmap_memory((void *) addr, |
| 269 | last - addr); | 269 | last - addr); |
| 270 | if(err < 0) | 270 | if(err < 0) |
| 271 | panic("munmap failed, errno = %d\n", | 271 | panic("munmap failed, errno = %d\n", |
| 272 | -err); | 272 | -err); |
| 273 | } | 273 | } |
| 274 | addr = last; | 274 | addr = last; |
| 275 | continue; | 275 | continue; |
| 276 | } | 276 | } |
| 277 | 277 | ||
| 278 | pmd = pmd_offset(pud, addr); | 278 | pmd = pmd_offset(pud, addr); |
| 279 | if(!pmd_present(*pmd)){ | 279 | if(!pmd_present(*pmd)){ |
| 280 | last = ADD_ROUND(addr, PMD_SIZE); | 280 | last = ADD_ROUND(addr, PMD_SIZE); |
| 281 | if(last > end) | 281 | if(last > end) |
| 282 | last = end; | 282 | last = end; |
| 283 | if(pmd_newpage(*pmd)){ | 283 | if(pmd_newpage(*pmd)){ |
| 284 | updated = 1; | 284 | updated = 1; |
| 285 | err = os_unmap_memory((void *) addr, | 285 | err = os_unmap_memory((void *) addr, |
| 286 | last - addr); | 286 | last - addr); |
| 287 | if(err < 0) | 287 | if(err < 0) |
| 288 | panic("munmap failed, errno = %d\n", | 288 | panic("munmap failed, errno = %d\n", |
| 289 | -err); | 289 | -err); |
| 290 | } | 290 | } |
| 291 | addr = last; | 291 | addr = last; |
| 292 | continue; | 292 | continue; |
| 293 | } | 293 | } |
| 294 | 294 | ||
| 295 | pte = pte_offset_kernel(pmd, addr); | 295 | pte = pte_offset_kernel(pmd, addr); |
| 296 | if(!pte_present(*pte) || pte_newpage(*pte)){ | 296 | if(!pte_present(*pte) || pte_newpage(*pte)){ |
| 297 | updated = 1; | 297 | updated = 1; |
| 298 | err = os_unmap_memory((void *) addr, | 298 | err = os_unmap_memory((void *) addr, |
| 299 | PAGE_SIZE); | 299 | PAGE_SIZE); |
| 300 | if(err < 0) | 300 | if(err < 0) |
| 301 | panic("munmap failed, errno = %d\n", | 301 | panic("munmap failed, errno = %d\n", |
| 302 | -err); | 302 | -err); |
| 303 | if(pte_present(*pte)) | 303 | if(pte_present(*pte)) |
| 304 | map_memory(addr, | 304 | map_memory(addr, |
| 305 | pte_val(*pte) & PAGE_MASK, | 305 | pte_val(*pte) & PAGE_MASK, |
| 306 | PAGE_SIZE, 1, 1, 1); | 306 | PAGE_SIZE, 1, 1, 1); |
| 307 | } | 307 | } |
| 308 | else if(pte_newprot(*pte)){ | 308 | else if(pte_newprot(*pte)){ |
| 309 | updated = 1; | 309 | updated = 1; |
| 310 | os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1); | 310 | os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1); |
| 311 | } | 311 | } |
| 312 | addr += PAGE_SIZE; | 312 | addr += PAGE_SIZE; |
| 313 | } | 313 | } |
| 314 | return(updated); | 314 | return(updated); |
| 315 | } | 315 | } |
| 316 | 316 | ||
| 317 | pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) | 317 | pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) |
| 318 | { | 318 | { |
| 319 | return(pgd_offset(mm, address)); | 319 | return(pgd_offset(mm, address)); |
| 320 | } | 320 | } |
| 321 | 321 | ||
| 322 | pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) | 322 | pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) |
| 323 | { | 323 | { |
| 324 | return(pud_offset(pgd, address)); | 324 | return(pud_offset(pgd, address)); |
| 325 | } | 325 | } |
| 326 | 326 | ||
| 327 | pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) | 327 | pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) |
| 328 | { | 328 | { |
| 329 | return(pmd_offset(pud, address)); | 329 | return(pmd_offset(pud, address)); |
| 330 | } | 330 | } |
| 331 | 331 | ||
| 332 | pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) | 332 | pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) |
| 333 | { | 333 | { |
| 334 | return(pte_offset_kernel(pmd, address)); | 334 | return(pte_offset_kernel(pmd, address)); |
| 335 | } | 335 | } |
| 336 | 336 | ||
| 337 | pte_t *addr_pte(struct task_struct *task, unsigned long addr) | 337 | pte_t *addr_pte(struct task_struct *task, unsigned long addr) |
| 338 | { | 338 | { |
| 339 | pgd_t *pgd = pgd_offset(task->mm, addr); | 339 | pgd_t *pgd = pgd_offset(task->mm, addr); |
| 340 | pud_t *pud = pud_offset(pgd, addr); | 340 | pud_t *pud = pud_offset(pgd, addr); |
| 341 | pmd_t *pmd = pmd_offset(pud, addr); | 341 | pmd_t *pmd = pmd_offset(pud, addr); |
| 342 | 342 | ||
| 343 | return(pte_offset_map(pmd, addr)); | 343 | return(pte_offset_map(pmd, addr)); |
| 344 | } | 344 | } |
| 345 | 345 | ||
| 346 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) | 346 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) |
| 347 | { | 347 | { |
| 348 | address &= PAGE_MASK; | 348 | address &= PAGE_MASK; |
| 349 | flush_tlb_range(vma, address, address + PAGE_SIZE); | 349 | flush_tlb_range(vma, address, address + PAGE_SIZE); |
| 350 | } | 350 | } |
| 351 | 351 | ||
| 352 | void flush_tlb_all(void) | 352 | void flush_tlb_all(void) |
| 353 | { | 353 | { |
| 354 | flush_tlb_mm(current->mm); | 354 | flush_tlb_mm(current->mm); |
| 355 | } | 355 | } |
| 356 | 356 | ||
| 357 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) | 357 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) |
| 358 | { | 358 | { |
| 359 | CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt, | 359 | CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt, |
| 360 | flush_tlb_kernel_range_common, start, end); | 360 | flush_tlb_kernel_range_common, start, end); |
| 361 | } | 361 | } |
| 362 | 362 | ||
| 363 | void flush_tlb_kernel_vm(void) | 363 | void flush_tlb_kernel_vm(void) |
| 364 | { | 364 | { |
| 365 | CHOOSE_MODE(flush_tlb_kernel_vm_tt(), | 365 | CHOOSE_MODE(flush_tlb_kernel_vm_tt(), |
| 366 | flush_tlb_kernel_range_common(start_vm, end_vm)); | 366 | flush_tlb_kernel_range_common(start_vm, end_vm)); |
| 367 | } | 367 | } |
| 368 | 368 | ||
| 369 | void __flush_tlb_one(unsigned long addr) | 369 | void __flush_tlb_one(unsigned long addr) |
| 370 | { | 370 | { |
| 371 | CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr); | 371 | CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr); |
| 372 | } | 372 | } |
| 373 | 373 | ||
| 374 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, | 374 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, |
| 375 | unsigned long end) | 375 | unsigned long end) |
| 376 | { | 376 | { |
| 377 | CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start, | 377 | CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start, |
| 378 | end); | 378 | end); |
| 379 | } | 379 | } |
| 380 | 380 | ||
| 381 | void flush_tlb_mm(struct mm_struct *mm) | 381 | void flush_tlb_mm(struct mm_struct *mm) |
| 382 | { | 382 | { |
| 383 | CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm); | 383 | CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm); |
| 384 | } | 384 | } |
| 385 | 385 | ||
| 386 | void force_flush_all(void) | 386 | void force_flush_all(void) |
| 387 | { | 387 | { |
| 388 | CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas()); | 388 | CHOOSE_MODE(force_flush_all_tt(), force_flush_all_skas()); |
| 389 | } | 389 | } |
| 390 | 390 | ||
