[1] | 1 | /* |
---|
| 2 | * vmm.c - virtual memory manager related operations interface. |
---|
| 3 | * |
---|
| 4 | * Authors Ghassan Almaless (2008,2009,2010,2011, 2012) |
---|
| 5 | * Mohamed Lamine Karaoui (2015) |
---|
| 6 | * Alain Greiner (2016) |
---|
[21] | 7 | * |
---|
[1] | 8 | * Copyright (c) UPMC Sorbonne Universites |
---|
| 9 | * |
---|
| 10 | * This file is part of ALMOS-MKH. |
---|
| 11 | * |
---|
| 12 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
---|
| 13 | * under the terms of the GNU General Public License as published by |
---|
| 14 | * the Free Software Foundation; version 2.0 of the License. |
---|
| 15 | * |
---|
| 16 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
---|
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
| 19 | * General Public License for more details. |
---|
| 20 | * |
---|
| 21 | * You should have received a copy of the GNU General Public License |
---|
| 22 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
---|
| 23 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
---|
| 24 | */ |
---|
| 25 | |
---|
[14] | 26 | #include <kernel_config.h> |
---|
[457] | 27 | #include <hal_kernel_types.h> |
---|
[1] | 28 | #include <hal_special.h> |
---|
| 29 | #include <hal_gpt.h> |
---|
[409] | 30 | #include <hal_vmm.h> |
---|
[1] | 31 | #include <printk.h> |
---|
[23] | 32 | #include <memcpy.h> |
---|
[1] | 33 | #include <rwlock.h> |
---|
| 34 | #include <list.h> |
---|
[408] | 35 | #include <xlist.h> |
---|
[1] | 36 | #include <bits.h> |
---|
| 37 | #include <process.h> |
---|
| 38 | #include <thread.h> |
---|
| 39 | #include <vseg.h> |
---|
| 40 | #include <cluster.h> |
---|
| 41 | #include <scheduler.h> |
---|
| 42 | #include <vfs.h> |
---|
| 43 | #include <mapper.h> |
---|
| 44 | #include <page.h> |
---|
| 45 | #include <kmem.h> |
---|
| 46 | #include <vmm.h> |
---|
[561] | 47 | #include <cluster_info.h> |
---|
[1] | 48 | |
---|
| 49 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 50 | // Extern global variables |
---|
| 51 | ////////////////////////////////////////////////////////////////////////////////// |
---|
| 52 | |
---|
| 53 | extern process_t process_zero; // defined in cluster.c file |
---|
| 54 | |
---|
| 55 | |
---|
[415] | 56 | /////////////////////////////////////// |
---|
| 57 | error_t vmm_init( process_t * process ) |
---|
[21] | 58 | { |
---|
[1] | 59 | error_t error; |
---|
| 60 | vseg_t * vseg_kentry; |
---|
| 61 | vseg_t * vseg_args; |
---|
| 62 | vseg_t * vseg_envs; |
---|
| 63 | intptr_t base; |
---|
| 64 | intptr_t size; |
---|
| 65 | |
---|
[438] | 66 | #if DEBUG_VMM_INIT |
---|
[433] | 67 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 68 | if( DEBUG_VMM_INIT ) |
---|
[433] | 69 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
| 70 | __FUNCTION__ , CURRENT_THREAD , process->pid , cycle ); |
---|
| 71 | #endif |
---|
[204] | 72 | |
---|
[1] | 73 | // get pointer on VMM |
---|
| 74 | vmm_t * vmm = &process->vmm; |
---|
| 75 | |
---|
[407] | 76 | // initialize local list of vsegs |
---|
| 77 | vmm->vsegs_nr = 0; |
---|
[408] | 78 | xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) ); |
---|
| 79 | remote_rwlock_init( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
---|
[407] | 80 | |
---|
[204] | 81 | assert( ((CONFIG_VMM_KENTRY_SIZE + CONFIG_VMM_ARGS_SIZE + CONFIG_VMM_ENVS_SIZE) |
---|
[492] | 82 | <= CONFIG_VMM_ELF_BASE) , "UTILS zone too small\n" ); |
---|
[21] | 83 | |
---|
[492] | 84 | assert( (CONFIG_THREAD_MAX_PER_CLUSTER <= 32) , |
---|
[204] | 85 | "no more than 32 threads per cluster for a single process\n"); |
---|
[1] | 86 | |
---|
[204] | 87 | assert( ((CONFIG_VMM_STACK_SIZE * CONFIG_THREAD_MAX_PER_CLUSTER) <= |
---|
[492] | 88 | (CONFIG_VMM_VSPACE_SIZE - CONFIG_VMM_STACK_BASE)) , |
---|
[204] | 89 | "STACK zone too small\n"); |
---|
[1] | 90 | |
---|
[409] | 91 | // register kentry vseg in VSL |
---|
[406] | 92 | base = CONFIG_VMM_KENTRY_BASE << CONFIG_PPM_PAGE_SHIFT; |
---|
[1] | 93 | size = CONFIG_VMM_KENTRY_SIZE << CONFIG_PPM_PAGE_SHIFT; |
---|
[406] | 94 | |
---|
[407] | 95 | vseg_kentry = vmm_create_vseg( process, |
---|
| 96 | VSEG_TYPE_CODE, |
---|
| 97 | base, |
---|
| 98 | size, |
---|
| 99 | 0, // file_offset unused |
---|
| 100 | 0, // file_size unused |
---|
| 101 | XPTR_NULL, // mapper_xp unused |
---|
| 102 | local_cxy ); |
---|
[204] | 103 | |
---|
[415] | 104 | if( vseg_kentry == NULL ) |
---|
| 105 | { |
---|
| 106 | printk("\n[ERROR] in %s : cannot register kentry vseg\n", __FUNCTION__ ); |
---|
| 107 | return -1; |
---|
| 108 | } |
---|
[204] | 109 | |
---|
[406] | 110 | vmm->kent_vpn_base = base; |
---|
[1] | 111 | |
---|
[409] | 112 | // register args vseg in VSL |
---|
[406] | 113 | base = (CONFIG_VMM_KENTRY_BASE + |
---|
| 114 | CONFIG_VMM_KENTRY_SIZE ) << CONFIG_PPM_PAGE_SHIFT; |
---|
[1] | 115 | size = CONFIG_VMM_ARGS_SIZE << CONFIG_PPM_PAGE_SHIFT; |
---|
[406] | 116 | |
---|
[407] | 117 | vseg_args = vmm_create_vseg( process, |
---|
| 118 | VSEG_TYPE_DATA, |
---|
| 119 | base, |
---|
| 120 | size, |
---|
| 121 | 0, // file_offset unused |
---|
| 122 | 0, // file_size unused |
---|
| 123 | XPTR_NULL, // mapper_xp unused |
---|
| 124 | local_cxy ); |
---|
[204] | 125 | |
---|
[415] | 126 | if( vseg_args == NULL ) |
---|
| 127 | { |
---|
| 128 | printk("\n[ERROR] in %s : cannot register args vseg\n", __FUNCTION__ ); |
---|
| 129 | return -1; |
---|
| 130 | } |
---|
[204] | 131 | |
---|
[406] | 132 | vmm->args_vpn_base = base; |
---|
[1] | 133 | |
---|
[409] | 134 | // register the envs vseg in VSL |
---|
[406] | 135 | base = (CONFIG_VMM_KENTRY_BASE + |
---|
| 136 | CONFIG_VMM_KENTRY_SIZE + |
---|
| 137 | CONFIG_VMM_ARGS_SIZE ) << CONFIG_PPM_PAGE_SHIFT; |
---|
[1] | 138 | size = CONFIG_VMM_ENVS_SIZE << CONFIG_PPM_PAGE_SHIFT; |
---|
[406] | 139 | |
---|
[407] | 140 | vseg_envs = vmm_create_vseg( process, |
---|
| 141 | VSEG_TYPE_DATA, |
---|
| 142 | base, |
---|
| 143 | size, |
---|
| 144 | 0, // file_offset unused |
---|
| 145 | 0, // file_size unused |
---|
| 146 | XPTR_NULL, // mapper_xp unused |
---|
| 147 | local_cxy ); |
---|
[204] | 148 | |
---|
[415] | 149 | if( vseg_envs == NULL ) |
---|
| 150 | { |
---|
| 151 | printk("\n[ERROR] in %s : cannot register envs vseg\n", __FUNCTION__ ); |
---|
| 152 | return -1; |
---|
| 153 | } |
---|
[204] | 154 | |
---|
[406] | 155 | vmm->envs_vpn_base = base; |
---|
[1] | 156 | |
---|
[409] | 157 | // create GPT (empty) |
---|
[1] | 158 | error = hal_gpt_create( &vmm->gpt ); |
---|
| 159 | |
---|
[415] | 160 | if( error ) |
---|
| 161 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
---|
[204] | 162 | |
---|
[415] | 163 | // initialize GPT (architecture specic) |
---|
[409] | 164 | // (For TSAR, identity map the kentry_vseg) |
---|
| 165 | error = hal_vmm_init( vmm ); |
---|
| 166 | |
---|
[415] | 167 | if( error ) |
---|
| 168 | printk("\n[ERROR] in %s : cannot initialize GPT\n", __FUNCTION__ ); |
---|
[409] | 169 | |
---|
[1] | 170 | // initialize STACK allocator |
---|
| 171 | vmm->stack_mgr.bitmap = 0; |
---|
| 172 | vmm->stack_mgr.vpn_base = CONFIG_VMM_STACK_BASE; |
---|
[457] | 173 | spinlock_init( &vmm->stack_mgr.lock ); |
---|
[1] | 174 | |
---|
| 175 | // initialize MMAP allocator |
---|
[407] | 176 | vmm->mmap_mgr.vpn_base = CONFIG_VMM_HEAP_BASE; |
---|
| 177 | vmm->mmap_mgr.vpn_size = CONFIG_VMM_STACK_BASE - CONFIG_VMM_HEAP_BASE; |
---|
| 178 | vmm->mmap_mgr.first_free_vpn = CONFIG_VMM_HEAP_BASE; |
---|
[457] | 179 | spinlock_init( &vmm->mmap_mgr.lock ); |
---|
| 180 | |
---|
[1] | 181 | uint32_t i; |
---|
| 182 | for( i = 0 ; i < 32 ; i++ ) list_root_init( &vmm->mmap_mgr.zombi_list[i] ); |
---|
| 183 | |
---|
[21] | 184 | // initialize instrumentation counters |
---|
[409] | 185 | vmm->pgfault_nr = 0; |
---|
[1] | 186 | |
---|
[124] | 187 | hal_fence(); |
---|
[1] | 188 | |
---|
[438] | 189 | #if DEBUG_VMM_INIT |
---|
[433] | 190 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 191 | if( DEBUG_VMM_INIT ) |
---|
[433] | 192 | printk("\n[DBG] %s : thread %x exit for process %x / entry_point = %x / cycle %d\n", |
---|
| 193 | __FUNCTION__ , CURRENT_THREAD , process->pid , process->vmm.entry_point , cycle ); |
---|
| 194 | #endif |
---|
[204] | 195 | |
---|
[415] | 196 | return 0; |
---|
| 197 | |
---|
[204] | 198 | } // end vmm_init() |
---|
| 199 | |
---|
[407] | 200 | ////////////////////////////////////// |
---|
| 201 | void vmm_display( process_t * process, |
---|
| 202 | bool_t mapping ) |
---|
| 203 | { |
---|
| 204 | vmm_t * vmm = &process->vmm; |
---|
| 205 | gpt_t * gpt = &vmm->gpt; |
---|
| 206 | |
---|
[457] | 207 | printk("\n***** VSL and GPT(%x) for process %x in cluster %x\n\n", |
---|
| 208 | process->vmm.gpt.ptr , process->pid , local_cxy ); |
---|
[407] | 209 | |
---|
| 210 | // get lock protecting the vseg list |
---|
[408] | 211 | remote_rwlock_rd_lock( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
---|
[407] | 212 | |
---|
| 213 | // scan the list of vsegs |
---|
[408] | 214 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
| 215 | xptr_t iter_xp; |
---|
| 216 | xptr_t vseg_xp; |
---|
[407] | 217 | vseg_t * vseg; |
---|
[408] | 218 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[407] | 219 | { |
---|
[408] | 220 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 221 | vseg = GET_PTR( vseg_xp ); |
---|
[408] | 222 | |
---|
[407] | 223 | printk(" - %s : base = %X / size = %X / npages = %d\n", |
---|
| 224 | vseg_type_str( vseg->type ) , vseg->min , vseg->max - vseg->min , vseg->vpn_size ); |
---|
| 225 | |
---|
| 226 | if( mapping ) |
---|
| 227 | { |
---|
| 228 | vpn_t vpn; |
---|
| 229 | ppn_t ppn; |
---|
| 230 | uint32_t attr; |
---|
| 231 | vpn_t base = vseg->vpn_base; |
---|
| 232 | vpn_t size = vseg->vpn_size; |
---|
| 233 | for( vpn = base ; vpn < (base+size) ; vpn++ ) |
---|
| 234 | { |
---|
| 235 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
---|
| 236 | if( attr & GPT_MAPPED ) |
---|
| 237 | { |
---|
| 238 | printk(" . vpn = %X / attr = %X / ppn = %X\n", vpn , attr , ppn ); |
---|
| 239 | } |
---|
| 240 | } |
---|
| 241 | } |
---|
| 242 | } |
---|
| 243 | |
---|
| 244 | // release the lock |
---|
[408] | 245 | remote_rwlock_rd_unlock( XPTR( local_cxy , &vmm->vsegs_lock ) ); |
---|
[407] | 246 | |
---|
[408] | 247 | } // vmm_display() |
---|
| 248 | |
---|
[433] | 249 | /////////////////////i////////////////////////// |
---|
| 250 | void vmm_global_update_pte( process_t * process, |
---|
| 251 | vpn_t vpn, |
---|
| 252 | uint32_t attr, |
---|
| 253 | ppn_t ppn ) |
---|
[23] | 254 | { |
---|
| 255 | |
---|
[408] | 256 | xlist_entry_t * process_root_ptr; |
---|
| 257 | xptr_t process_root_xp; |
---|
| 258 | xptr_t process_iter_xp; |
---|
[23] | 259 | |
---|
[408] | 260 | xptr_t remote_process_xp; |
---|
| 261 | cxy_t remote_process_cxy; |
---|
| 262 | process_t * remote_process_ptr; |
---|
| 263 | xptr_t remote_gpt_xp; |
---|
[23] | 264 | |
---|
[408] | 265 | pid_t pid; |
---|
| 266 | cxy_t owner_cxy; |
---|
| 267 | lpid_t owner_lpid; |
---|
[23] | 268 | |
---|
[438] | 269 | #if DEBUG_VMM_UPDATE_PTE |
---|
[433] | 270 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 271 | if( DEBUG_VMM_UPDATE_PTE < cycle ) |
---|
[433] | 272 | printk("\n[DBG] %s : thread %x enter for process %x / vpn %x / cycle %d\n", |
---|
| 273 | __FUNCTION__ , CURRENT_THREAD , process->pid , vpn , cycle ); |
---|
| 274 | #endif |
---|
| 275 | |
---|
| 276 | // check cluster is reference |
---|
[492] | 277 | assert( (GET_CXY( process->ref_xp ) == local_cxy) , |
---|
[433] | 278 | "not called in reference cluster\n"); |
---|
| 279 | |
---|
[408] | 280 | // get extended pointer on root of process copies xlist in owner cluster |
---|
| 281 | pid = process->pid; |
---|
| 282 | owner_cxy = CXY_FROM_PID( pid ); |
---|
| 283 | owner_lpid = LPID_FROM_PID( pid ); |
---|
| 284 | process_root_ptr = &LOCAL_CLUSTER->pmgr.copies_root[owner_lpid]; |
---|
| 285 | process_root_xp = XPTR( owner_cxy , process_root_ptr ); |
---|
[23] | 286 | |
---|
[408] | 287 | // loop on destination process copies |
---|
| 288 | XLIST_FOREACH( process_root_xp , process_iter_xp ) |
---|
| 289 | { |
---|
| 290 | // get cluster and local pointer on remote process |
---|
| 291 | remote_process_xp = XLIST_ELEMENT( process_iter_xp , process_t , copies_list ); |
---|
[433] | 292 | remote_process_ptr = GET_PTR( remote_process_xp ); |
---|
[408] | 293 | remote_process_cxy = GET_CXY( remote_process_xp ); |
---|
[407] | 294 | |
---|
[438] | 295 | #if (DEBUG_VMM_UPDATE_PTE & 0x1) |
---|
| 296 | if( DEBUG_VMM_UPDATE_PTE < cycle ) |
---|
[433] | 297 | printk("\n[DBG] %s : thread %x handling process %x in cluster %x\n", |
---|
| 298 | __FUNCTION__ , CURRENT_THREAD , process->pid , remote_process_cxy ); |
---|
| 299 | #endif |
---|
| 300 | |
---|
[408] | 301 | // get extended pointer on remote gpt |
---|
| 302 | remote_gpt_xp = XPTR( remote_process_cxy , &remote_process_ptr->vmm.gpt ); |
---|
| 303 | |
---|
[433] | 304 | // update remote GPT |
---|
| 305 | hal_gpt_update_pte( remote_gpt_xp, vpn, attr, ppn ); |
---|
[408] | 306 | } |
---|
| 307 | |
---|
[438] | 308 | #if DEBUG_VMM_UPDATE_PTE |
---|
[433] | 309 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 310 | if( DEBUG_VMM_UPDATE_PTE < cycle ) |
---|
[433] | 311 | printk("\n[DBG] %s : thread %x exit for process %x / vpn %x / cycle %d\n", |
---|
| 312 | __FUNCTION__ , CURRENT_THREAD , process->pid , vpn , cycle ); |
---|
| 313 | #endif |
---|
| 314 | |
---|
| 315 | } // end vmm_global_update_pte() |
---|
| 316 | |
---|
[408] | 317 | /////////////////////////////////////// |
---|
| 318 | void vmm_set_cow( process_t * process ) |
---|
| 319 | { |
---|
| 320 | vmm_t * vmm; |
---|
| 321 | |
---|
| 322 | xlist_entry_t * process_root_ptr; |
---|
| 323 | xptr_t process_root_xp; |
---|
| 324 | xptr_t process_iter_xp; |
---|
| 325 | |
---|
| 326 | xptr_t remote_process_xp; |
---|
| 327 | cxy_t remote_process_cxy; |
---|
| 328 | process_t * remote_process_ptr; |
---|
| 329 | xptr_t remote_gpt_xp; |
---|
| 330 | |
---|
| 331 | xptr_t vseg_root_xp; |
---|
| 332 | xptr_t vseg_iter_xp; |
---|
| 333 | |
---|
| 334 | xptr_t vseg_xp; |
---|
| 335 | vseg_t * vseg; |
---|
| 336 | |
---|
| 337 | pid_t pid; |
---|
| 338 | cxy_t owner_cxy; |
---|
| 339 | lpid_t owner_lpid; |
---|
| 340 | |
---|
[438] | 341 | #if DEBUG_VMM_SET_COW |
---|
[433] | 342 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 343 | if( DEBUG_VMM_SET_COW < cycle ) |
---|
[433] | 344 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
| 345 | __FUNCTION__ , CURRENT_THREAD , process->pid , cycle ); |
---|
| 346 | #endif |
---|
[408] | 347 | |
---|
| 348 | // check cluster is reference |
---|
[492] | 349 | assert( (GET_CXY( process->ref_xp ) == local_cxy) , |
---|
[408] | 350 | "local cluster is not process reference cluster\n"); |
---|
| 351 | |
---|
| 352 | // get pointer on reference VMM |
---|
| 353 | vmm = &process->vmm; |
---|
| 354 | |
---|
| 355 | // get extended pointer on root of process copies xlist in owner cluster |
---|
| 356 | pid = process->pid; |
---|
| 357 | owner_cxy = CXY_FROM_PID( pid ); |
---|
| 358 | owner_lpid = LPID_FROM_PID( pid ); |
---|
| 359 | process_root_ptr = &LOCAL_CLUSTER->pmgr.copies_root[owner_lpid]; |
---|
| 360 | process_root_xp = XPTR( owner_cxy , process_root_ptr ); |
---|
| 361 | |
---|
| 362 | // get extended pointer on root of vsegs xlist from reference VMM |
---|
| 363 | vseg_root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
| 364 | |
---|
| 365 | // loop on destination process copies |
---|
| 366 | XLIST_FOREACH( process_root_xp , process_iter_xp ) |
---|
| 367 | { |
---|
| 368 | // get cluster and local pointer on remote process |
---|
| 369 | remote_process_xp = XLIST_ELEMENT( process_iter_xp , process_t , copies_list ); |
---|
[433] | 370 | remote_process_ptr = GET_PTR( remote_process_xp ); |
---|
[408] | 371 | remote_process_cxy = GET_CXY( remote_process_xp ); |
---|
| 372 | |
---|
[438] | 373 | #if (DEBUG_VMM_SET_COW &0x1) |
---|
| 374 | if( DEBUG_VMM_SET_COW < cycle ) |
---|
[433] | 375 | printk("\n[DBG] %s : thread %x handling process %x in cluster %x\n", |
---|
| 376 | __FUNCTION__ , CURRENT_THREAD , process->pid , remote_process_cxy ); |
---|
| 377 | #endif |
---|
[408] | 378 | |
---|
| 379 | // get extended pointer on remote gpt |
---|
| 380 | remote_gpt_xp = XPTR( remote_process_cxy , &remote_process_ptr->vmm.gpt ); |
---|
| 381 | |
---|
| 382 | // loop on vsegs in (local) reference process VSL |
---|
| 383 | XLIST_FOREACH( vseg_root_xp , vseg_iter_xp ) |
---|
| 384 | { |
---|
| 385 | // get pointer on vseg |
---|
| 386 | vseg_xp = XLIST_ELEMENT( vseg_iter_xp , vseg_t , xlist ); |
---|
[433] | 387 | vseg = GET_PTR( vseg_xp ); |
---|
[408] | 388 | |
---|
[492] | 389 | assert( (GET_CXY( vseg_xp ) == local_cxy) , |
---|
[408] | 390 | "all vsegs in reference VSL must be local\n" ); |
---|
| 391 | |
---|
| 392 | // get vseg type, base and size |
---|
| 393 | uint32_t type = vseg->type; |
---|
| 394 | vpn_t vpn_base = vseg->vpn_base; |
---|
| 395 | vpn_t vpn_size = vseg->vpn_size; |
---|
| 396 | |
---|
[438] | 397 | #if (DEBUG_VMM_SET_COW & 0x1) |
---|
| 398 | if( DEBUG_VMM_SET_COW < cycle ) |
---|
[433] | 399 | printk("\n[DBG] %s : thread %x handling vseg %s / vpn_base = %x / vpn_size = %x\n", |
---|
| 400 | __FUNCTION__, CURRENT_THREAD , vseg_type_str(type), vpn_base, vpn_size ); |
---|
| 401 | #endif |
---|
| 402 | // only DATA, ANON and REMOTE vsegs |
---|
[408] | 403 | if( (type == VSEG_TYPE_DATA) || |
---|
| 404 | (type == VSEG_TYPE_ANON) || |
---|
| 405 | (type == VSEG_TYPE_REMOTE) ) |
---|
| 406 | { |
---|
[433] | 407 | vpn_t vpn; |
---|
| 408 | uint32_t attr; |
---|
| 409 | ppn_t ppn; |
---|
| 410 | xptr_t page_xp; |
---|
| 411 | cxy_t page_cxy; |
---|
| 412 | page_t * page_ptr; |
---|
| 413 | xptr_t forks_xp; |
---|
[469] | 414 | xptr_t lock_xp; |
---|
[433] | 415 | |
---|
| 416 | // update flags in remote GPT |
---|
| 417 | hal_gpt_set_cow( remote_gpt_xp, |
---|
| 418 | vpn_base, |
---|
| 419 | vpn_size ); |
---|
| 420 | |
---|
| 421 | // atomically increment pending forks counter in physical pages, |
---|
| 422 | // for all vseg pages that are mapped in reference cluster |
---|
| 423 | if( remote_process_cxy == local_cxy ) |
---|
| 424 | { |
---|
| 425 | // the reference GPT is the local GPT |
---|
| 426 | gpt_t * gpt = GET_PTR( remote_gpt_xp ); |
---|
| 427 | |
---|
| 428 | // scan all pages in vseg |
---|
| 429 | for( vpn = vpn_base ; vpn < (vpn_base + vpn_size) ; vpn++ ) |
---|
| 430 | { |
---|
| 431 | // get page attributes and PPN from reference GPT |
---|
| 432 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
---|
| 433 | |
---|
| 434 | // atomically update pending forks counter if page is mapped |
---|
| 435 | if( attr & GPT_MAPPED ) |
---|
| 436 | { |
---|
[469] | 437 | // get pointers and cluster on page descriptor |
---|
[433] | 438 | page_xp = ppm_ppn2page( ppn ); |
---|
| 439 | page_cxy = GET_CXY( page_xp ); |
---|
| 440 | page_ptr = GET_PTR( page_xp ); |
---|
[469] | 441 | |
---|
| 442 | // get extended pointers on "forks" and "lock" |
---|
[433] | 443 | forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
[469] | 444 | lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
| 445 | |
---|
| 446 | // increment "forks" |
---|
| 447 | remote_spinlock_lock( lock_xp ); |
---|
[433] | 448 | hal_remote_atomic_add( forks_xp , 1 ); |
---|
[469] | 449 | remote_spinlock_unlock( lock_xp ); |
---|
[433] | 450 | } |
---|
| 451 | } // end loop on vpn |
---|
| 452 | } // end if local |
---|
| 453 | } // end if vseg type |
---|
| 454 | } // end loop on vsegs |
---|
[408] | 455 | } // end loop on process copies |
---|
| 456 | |
---|
[438] | 457 | #if DEBUG_VMM_SET_COW |
---|
[433] | 458 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 459 | if( DEBUG_VMM_SET_COW < cycle ) |
---|
[433] | 460 | printk("\n[DBG] %s : thread %x exit for process %x / cycle %d\n", |
---|
| 461 | __FUNCTION__ , CURRENT_THREAD , process->pid , cycle ); |
---|
| 462 | #endif |
---|
[408] | 463 | |
---|
| 464 | } // end vmm_set-cow() |
---|
| 465 | |
---|
| 466 | ///////////////////////////////////////////////// |
---|
| 467 | error_t vmm_fork_copy( process_t * child_process, |
---|
| 468 | xptr_t parent_process_xp ) |
---|
| 469 | { |
---|
| 470 | error_t error; |
---|
| 471 | cxy_t parent_cxy; |
---|
| 472 | process_t * parent_process; |
---|
| 473 | vmm_t * parent_vmm; |
---|
| 474 | xptr_t parent_lock_xp; |
---|
| 475 | vmm_t * child_vmm; |
---|
| 476 | xptr_t iter_xp; |
---|
| 477 | xptr_t parent_vseg_xp; |
---|
| 478 | vseg_t * parent_vseg; |
---|
| 479 | vseg_t * child_vseg; |
---|
| 480 | uint32_t type; |
---|
| 481 | bool_t cow; |
---|
| 482 | vpn_t vpn; |
---|
| 483 | vpn_t vpn_base; |
---|
| 484 | vpn_t vpn_size; |
---|
[469] | 485 | xptr_t page_xp; // extended pointer on page descriptor |
---|
[408] | 486 | page_t * page_ptr; |
---|
| 487 | cxy_t page_cxy; |
---|
[469] | 488 | xptr_t forks_xp; // extended pointer on forks counter in page descriptor |
---|
| 489 | xptr_t lock_xp; // extended pointer on lock protecting the forks counter |
---|
[408] | 490 | xptr_t parent_root_xp; |
---|
| 491 | bool_t mapped; |
---|
| 492 | ppn_t ppn; |
---|
| 493 | |
---|
[438] | 494 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 495 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 496 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 497 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", |
---|
| 498 | __FUNCTION__ , CURRENT_THREAD, cycle ); |
---|
| 499 | #endif |
---|
[408] | 500 | |
---|
| 501 | // get parent process cluster and local pointer |
---|
| 502 | parent_cxy = GET_CXY( parent_process_xp ); |
---|
[433] | 503 | parent_process = GET_PTR( parent_process_xp ); |
---|
[408] | 504 | |
---|
| 505 | // get local pointers on parent and child VMM |
---|
| 506 | parent_vmm = &parent_process->vmm; |
---|
| 507 | child_vmm = &child_process->vmm; |
---|
| 508 | |
---|
| 509 | // get extended pointer on lock protecting the parent VSL |
---|
| 510 | parent_lock_xp = XPTR( parent_cxy , &parent_vmm->vsegs_lock ); |
---|
| 511 | |
---|
| 512 | // initialize the lock protecting the child VSL |
---|
| 513 | remote_rwlock_init( XPTR( local_cxy , &child_vmm->vsegs_lock ) ); |
---|
| 514 | |
---|
| 515 | // initialize the child VSL as empty |
---|
| 516 | xlist_root_init( XPTR( local_cxy, &child_vmm->vsegs_root ) ); |
---|
| 517 | child_vmm->vsegs_nr = 0; |
---|
| 518 | |
---|
[415] | 519 | // create child GPT |
---|
[408] | 520 | error = hal_gpt_create( &child_vmm->gpt ); |
---|
[415] | 521 | |
---|
[407] | 522 | if( error ) |
---|
| 523 | { |
---|
[408] | 524 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
---|
| 525 | return -1; |
---|
[407] | 526 | } |
---|
| 527 | |
---|
[408] | 528 | // build extended pointer on parent VSL |
---|
| 529 | parent_root_xp = XPTR( parent_cxy , &parent_vmm->vsegs_root ); |
---|
| 530 | |
---|
[415] | 531 | // take the lock protecting the parent VSL |
---|
| 532 | remote_rwlock_rd_lock( parent_lock_xp ); |
---|
| 533 | |
---|
[408] | 534 | // loop on parent VSL xlist |
---|
| 535 | XLIST_FOREACH( parent_root_xp , iter_xp ) |
---|
[23] | 536 | { |
---|
[408] | 537 | // get local and extended pointers on current parent vseg |
---|
| 538 | parent_vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 539 | parent_vseg = GET_PTR( parent_vseg_xp ); |
---|
[23] | 540 | |
---|
[408] | 541 | // get vseg type |
---|
| 542 | type = hal_remote_lw( XPTR( parent_cxy , &parent_vseg->type ) ); |
---|
| 543 | |
---|
[438] | 544 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 545 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 546 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 547 | printk("\n[DBG] %s : thread %x found parent vseg %s / vpn_base = %x / cycle %d\n", |
---|
| 548 | __FUNCTION__ , CURRENT_THREAD, vseg_type_str(type), |
---|
| 549 | hal_remote_lw( XPTR( parent_cxy , &parent_vseg->vpn_base ) ) , cycle ); |
---|
| 550 | #endif |
---|
[23] | 551 | |
---|
[408] | 552 | // all parent vsegs - but STACK - must be copied in child VSL |
---|
| 553 | if( type != VSEG_TYPE_STACK ) |
---|
[23] | 554 | { |
---|
[408] | 555 | // allocate memory for a new child vseg |
---|
| 556 | child_vseg = vseg_alloc(); |
---|
| 557 | if( child_vseg == NULL ) // release all allocated vsegs |
---|
[23] | 558 | { |
---|
[408] | 559 | vmm_destroy( child_process ); |
---|
| 560 | printk("\n[ERROR] in %s : cannot create vseg for child\n", __FUNCTION__ ); |
---|
| 561 | return -1; |
---|
[23] | 562 | } |
---|
| 563 | |
---|
[408] | 564 | // copy parent vseg to child vseg |
---|
| 565 | vseg_init_from_ref( child_vseg , parent_vseg_xp ); |
---|
[23] | 566 | |
---|
[408] | 567 | // register child vseg in child VSL |
---|
| 568 | vseg_attach( child_vmm , child_vseg ); |
---|
[407] | 569 | |
---|
[438] | 570 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 571 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 572 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 573 | printk("\n[DBG] %s : thread %x copied vseg %s / vpn_base = %x to child VSL / cycle %d\n", |
---|
| 574 | __FUNCTION__ , CURRENT_THREAD , vseg_type_str(type), |
---|
| 575 | hal_remote_lw( XPTR( parent_cxy , &parent_vseg->vpn_base ) ) , cycle ); |
---|
| 576 | #endif |
---|
[23] | 577 | |
---|
[408] | 578 | // copy DATA, MMAP, REMOTE, FILE parent GPT entries to child GPT |
---|
| 579 | if( type != VSEG_TYPE_CODE ) |
---|
| 580 | { |
---|
| 581 | // activate the COW for DATA, MMAP, REMOTE vsegs only |
---|
| 582 | cow = ( type != VSEG_TYPE_FILE ); |
---|
[23] | 583 | |
---|
[408] | 584 | vpn_base = child_vseg->vpn_base; |
---|
| 585 | vpn_size = child_vseg->vpn_size; |
---|
[23] | 586 | |
---|
[408] | 587 | // scan pages in parent vseg |
---|
| 588 | for( vpn = vpn_base ; vpn < (vpn_base + vpn_size) ; vpn++ ) |
---|
| 589 | { |
---|
| 590 | error = hal_gpt_pte_copy( &child_vmm->gpt, |
---|
| 591 | XPTR( parent_cxy , &parent_vmm->gpt ), |
---|
| 592 | vpn, |
---|
| 593 | cow, |
---|
| 594 | &ppn, |
---|
| 595 | &mapped ); |
---|
| 596 | if( error ) |
---|
| 597 | { |
---|
| 598 | vmm_destroy( child_process ); |
---|
| 599 | printk("\n[ERROR] in %s : cannot copy GPT\n", __FUNCTION__ ); |
---|
| 600 | return -1; |
---|
| 601 | } |
---|
| 602 | |
---|
[433] | 603 | // increment pending forks counter in page if mapped |
---|
[408] | 604 | if( mapped ) |
---|
| 605 | { |
---|
[469] | 606 | // get pointers and cluster on page descriptor |
---|
| 607 | page_xp = ppm_ppn2page( ppn ); |
---|
[408] | 608 | page_cxy = GET_CXY( page_xp ); |
---|
[433] | 609 | page_ptr = GET_PTR( page_xp ); |
---|
[408] | 610 | |
---|
[469] | 611 | // get extended pointers on "forks" and "lock" |
---|
| 612 | forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
| 613 | lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
| 614 | |
---|
| 615 | // increment "forks" |
---|
| 616 | remote_spinlock_lock( lock_xp ); |
---|
| 617 | hal_remote_atomic_add( forks_xp , 1 ); |
---|
| 618 | remote_spinlock_unlock( lock_xp ); |
---|
| 619 | |
---|
[438] | 620 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 621 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 622 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 623 | printk("\n[DBG] %s : thread %x copied vpn %x to child GPT / cycle %d\n", |
---|
| 624 | __FUNCTION__ , CURRENT_THREAD , vpn , cycle ); |
---|
| 625 | #endif |
---|
[408] | 626 | } |
---|
| 627 | } |
---|
| 628 | } // end if no code & no stack |
---|
| 629 | } // end if no stack |
---|
| 630 | } // end loop on vsegs |
---|
| 631 | |
---|
| 632 | // release the parent vsegs lock |
---|
| 633 | remote_rwlock_rd_unlock( parent_lock_xp ); |
---|
| 634 | |
---|
[415] | 635 | // initialize child GPT (architecture specic) |
---|
| 636 | // => For TSAR, identity map the kentry_vseg |
---|
| 637 | error = hal_vmm_init( child_vmm ); |
---|
| 638 | |
---|
| 639 | if( error ) |
---|
| 640 | { |
---|
| 641 | printk("\n[ERROR] in %s : cannot create GPT\n", __FUNCTION__ ); |
---|
| 642 | return -1; |
---|
| 643 | } |
---|
| 644 | |
---|
[408] | 645 | // initialize the child VMM STACK allocator |
---|
| 646 | child_vmm->stack_mgr.bitmap = 0; |
---|
| 647 | child_vmm->stack_mgr.vpn_base = CONFIG_VMM_STACK_BASE; |
---|
| 648 | |
---|
| 649 | // initialize the child VMM MMAP allocator |
---|
[23] | 650 | uint32_t i; |
---|
[408] | 651 | child_vmm->mmap_mgr.vpn_base = CONFIG_VMM_HEAP_BASE; |
---|
| 652 | child_vmm->mmap_mgr.vpn_size = CONFIG_VMM_STACK_BASE - CONFIG_VMM_HEAP_BASE; |
---|
| 653 | child_vmm->mmap_mgr.first_free_vpn = CONFIG_VMM_HEAP_BASE; |
---|
| 654 | for( i = 0 ; i < 32 ; i++ ) list_root_init( &child_vmm->mmap_mgr.zombi_list[i] ); |
---|
[23] | 655 | |
---|
[178] | 656 | // initialize instrumentation counters |
---|
[408] | 657 | child_vmm->pgfault_nr = 0; |
---|
[23] | 658 | |
---|
[408] | 659 | // copy base addresses from parent VMM to child VMM |
---|
| 660 | child_vmm->kent_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->kent_vpn_base)); |
---|
| 661 | child_vmm->args_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->args_vpn_base)); |
---|
| 662 | child_vmm->envs_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->envs_vpn_base)); |
---|
| 663 | child_vmm->heap_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->heap_vpn_base)); |
---|
| 664 | child_vmm->code_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->code_vpn_base)); |
---|
| 665 | child_vmm->data_vpn_base = (vpn_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->data_vpn_base)); |
---|
[23] | 666 | |
---|
[408] | 667 | child_vmm->entry_point = (intptr_t)hal_remote_lpt(XPTR(parent_cxy, &parent_vmm->entry_point)); |
---|
[23] | 668 | |
---|
[124] | 669 | hal_fence(); |
---|
[23] | 670 | |
---|
[438] | 671 | #if DEBUG_VMM_FORK_COPY |
---|
[433] | 672 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 673 | if( DEBUG_VMM_FORK_COPY < cycle ) |
---|
[433] | 674 | printk("\n[DBG] %s : thread %x exit successfully / cycle %d\n", |
---|
| 675 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
---|
| 676 | #endif |
---|
| 677 | |
---|
[23] | 678 | return 0; |
---|
| 679 | |
---|
[408] | 680 | } // vmm_fork_copy() |
---|
[204] | 681 | |
---|
[1] | 682 | /////////////////////////////////////// |
---|
| 683 | void vmm_destroy( process_t * process ) |
---|
| 684 | { |
---|
[408] | 685 | xptr_t vseg_xp; |
---|
[1] | 686 | vseg_t * vseg; |
---|
| 687 | |
---|
[438] | 688 | #if DEBUG_VMM_DESTROY |
---|
[433] | 689 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 690 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[443] | 691 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
[469] | 692 | __FUNCTION__, CURRENT_THREAD->trdid, process->pid, local_cxy, cycle ); |
---|
[433] | 693 | #endif |
---|
[416] | 694 | |
---|
[438] | 695 | #if (DEBUG_VMM_DESTROY & 1 ) |
---|
[443] | 696 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[437] | 697 | vmm_display( process , true ); |
---|
| 698 | #endif |
---|
| 699 | |
---|
[433] | 700 | // get pointer on local VMM |
---|
[1] | 701 | vmm_t * vmm = &process->vmm; |
---|
| 702 | |
---|
[408] | 703 | // get extended pointer on VSL root and VSL lock |
---|
| 704 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
| 705 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 706 | |
---|
[1] | 707 | // get lock protecting vseg list |
---|
[408] | 708 | remote_rwlock_wr_lock( lock_xp ); |
---|
[1] | 709 | |
---|
[409] | 710 | // remove all user vsegs registered in VSL |
---|
[408] | 711 | while( !xlist_is_empty( root_xp ) ) |
---|
[1] | 712 | { |
---|
[409] | 713 | // get pointer on first vseg in VSL |
---|
[408] | 714 | vseg_xp = XLIST_FIRST_ELEMENT( root_xp , vseg_t , xlist ); |
---|
[433] | 715 | vseg = GET_PTR( vseg_xp ); |
---|
[409] | 716 | |
---|
[437] | 717 | // unmap and release physical pages |
---|
[409] | 718 | vmm_unmap_vseg( process , vseg ); |
---|
| 719 | |
---|
| 720 | // remove vseg from VSL |
---|
[473] | 721 | vseg_detach( vseg ); |
---|
[409] | 722 | |
---|
| 723 | // release memory allocated to vseg descriptor |
---|
[1] | 724 | vseg_free( vseg ); |
---|
[443] | 725 | |
---|
| 726 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 727 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
| 728 | printk("\n[DBG] %s : %s vseg released / vpn_base %x / vpn_size %d\n", |
---|
| 729 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 730 | #endif |
---|
| 731 | |
---|
[1] | 732 | } |
---|
| 733 | |
---|
[433] | 734 | // release lock protecting VSL |
---|
[408] | 735 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 736 | |
---|
| 737 | // remove all vsegs from zombi_lists in MMAP allocator |
---|
| 738 | uint32_t i; |
---|
| 739 | for( i = 0 ; i<32 ; i++ ) |
---|
| 740 | { |
---|
| 741 | while( !list_is_empty( &vmm->mmap_mgr.zombi_list[i] ) ) |
---|
| 742 | { |
---|
[408] | 743 | vseg = LIST_FIRST( &vmm->mmap_mgr.zombi_list[i] , vseg_t , zlist ); |
---|
[443] | 744 | |
---|
| 745 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 746 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
| 747 | printk("\n[DBG] %s : found zombi vseg / vpn_base %x / vpn_size %d\n", |
---|
| 748 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 749 | #endif |
---|
[473] | 750 | vseg_detach( vseg ); |
---|
[1] | 751 | vseg_free( vseg ); |
---|
[443] | 752 | |
---|
| 753 | #if( DEBUG_VMM_DESTROY & 1 ) |
---|
| 754 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
| 755 | printk("\n[DBG] %s : zombi vseg released / vpn_base %x / vpn_size %d\n", |
---|
| 756 | __FUNCTION__ , vseg_type_str( vseg->type ), vseg->vpn_base, vseg->vpn_size ); |
---|
| 757 | #endif |
---|
[1] | 758 | } |
---|
| 759 | } |
---|
| 760 | |
---|
[409] | 761 | // release memory allocated to the GPT itself |
---|
[1] | 762 | hal_gpt_destroy( &vmm->gpt ); |
---|
| 763 | |
---|
[438] | 764 | #if DEBUG_VMM_DESTROY |
---|
[433] | 765 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 766 | if( DEBUG_VMM_DESTROY < cycle ) |
---|
[443] | 767 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
[469] | 768 | __FUNCTION__, CURRENT_THREAD->trdid, process->pid, local_cxy , cycle ); |
---|
[433] | 769 | #endif |
---|
[416] | 770 | |
---|
[204] | 771 | } // end vmm_destroy() |
---|
| 772 | |
---|
[1] | 773 | ///////////////////////////////////////////////// |
---|
| 774 | vseg_t * vmm_check_conflict( process_t * process, |
---|
[21] | 775 | vpn_t vpn_base, |
---|
[1] | 776 | vpn_t vpn_size ) |
---|
| 777 | { |
---|
| 778 | vmm_t * vmm = &process->vmm; |
---|
[408] | 779 | |
---|
| 780 | // scan the VSL |
---|
[1] | 781 | vseg_t * vseg; |
---|
[408] | 782 | xptr_t iter_xp; |
---|
| 783 | xptr_t vseg_xp; |
---|
| 784 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
[1] | 785 | |
---|
[408] | 786 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[1] | 787 | { |
---|
[408] | 788 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 789 | vseg = GET_PTR( vseg_xp ); |
---|
[204] | 790 | |
---|
[21] | 791 | if( ((vpn_base + vpn_size) > vseg->vpn_base) && |
---|
| 792 | (vpn_base < (vseg->vpn_base + vseg->vpn_size)) ) return vseg; |
---|
[1] | 793 | } |
---|
| 794 | return NULL; |
---|
| 795 | |
---|
[204] | 796 | } // end vmm_check_conflict() |
---|
| 797 | |
---|
[1] | 798 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 799 | // This static function is called by the vmm_create_vseg() function, and implements |
---|
| 800 | // the VMM stack_vseg specific allocator. |
---|
| 801 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 802 | // @ vmm : pointer on VMM. |
---|
[21] | 803 | // @ vpn_base : (return value) first allocated page |
---|
[1] | 804 | // @ vpn_size : (return value) number of allocated pages |
---|
| 805 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 806 | static error_t vmm_stack_alloc( vmm_t * vmm, |
---|
| 807 | vpn_t * vpn_base, |
---|
| 808 | vpn_t * vpn_size ) |
---|
| 809 | { |
---|
| 810 | // get stack allocator pointer |
---|
| 811 | stack_mgr_t * mgr = &vmm->stack_mgr; |
---|
| 812 | |
---|
| 813 | // get lock on stack allocator |
---|
| 814 | spinlock_lock( &mgr->lock ); |
---|
| 815 | |
---|
| 816 | // get first free slot index in bitmap |
---|
| 817 | int32_t index = bitmap_ffc( &mgr->bitmap , 4 ); |
---|
[179] | 818 | if( (index < 0) || (index > 31) ) |
---|
| 819 | { |
---|
| 820 | spinlock_unlock( &mgr->lock ); |
---|
| 821 | return ENOMEM; |
---|
| 822 | } |
---|
[1] | 823 | |
---|
| 824 | // update bitmap |
---|
| 825 | bitmap_set( &mgr->bitmap , index ); |
---|
[21] | 826 | |
---|
[1] | 827 | // release lock on stack allocator |
---|
| 828 | spinlock_unlock( &mgr->lock ); |
---|
| 829 | |
---|
[21] | 830 | // returns vpn_base, vpn_size (one page non allocated) |
---|
[1] | 831 | *vpn_base = mgr->vpn_base + index * CONFIG_VMM_STACK_SIZE + 1; |
---|
| 832 | *vpn_size = CONFIG_VMM_STACK_SIZE - 1; |
---|
| 833 | return 0; |
---|
| 834 | |
---|
[204] | 835 | } // end vmm_stack_alloc() |
---|
| 836 | |
---|
[1] | 837 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 838 | // This static function is called by the vmm_create_vseg() function, and implements |
---|
| 839 | // the VMM MMAP specific allocator. |
---|
| 840 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 841 | // @ vmm : [in] pointer on VMM. |
---|
| 842 | // @ npages : [in] requested number of pages. |
---|
[21] | 843 | // @ vpn_base : [out] first allocated page. |
---|
[1] | 844 | // @ vpn_size : [out] actual number of allocated pages. |
---|
| 845 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 846 | static error_t vmm_mmap_alloc( vmm_t * vmm, |
---|
| 847 | vpn_t npages, |
---|
| 848 | vpn_t * vpn_base, |
---|
| 849 | vpn_t * vpn_size ) |
---|
| 850 | { |
---|
| 851 | uint32_t index; |
---|
| 852 | vseg_t * vseg; |
---|
| 853 | vpn_t base; |
---|
| 854 | vpn_t size; |
---|
[21] | 855 | vpn_t free; |
---|
[1] | 856 | |
---|
[21] | 857 | // mmap vseg size must be power of 2 |
---|
[1] | 858 | // compute actual size and index in zombi_list array |
---|
| 859 | size = POW2_ROUNDUP( npages ); |
---|
| 860 | index = bits_log2( size ); |
---|
| 861 | |
---|
| 862 | // get mmap allocator pointer |
---|
| 863 | mmap_mgr_t * mgr = &vmm->mmap_mgr; |
---|
| 864 | |
---|
| 865 | // get lock on mmap allocator |
---|
| 866 | spinlock_lock( &mgr->lock ); |
---|
| 867 | |
---|
| 868 | // get vseg from zombi_list or from mmap zone |
---|
| 869 | if( list_is_empty( &mgr->zombi_list[index] ) ) // from mmap zone |
---|
| 870 | { |
---|
| 871 | // check overflow |
---|
| 872 | free = mgr->first_free_vpn; |
---|
| 873 | if( (free + size) > mgr->vpn_size ) return ENOMEM; |
---|
| 874 | |
---|
| 875 | // update STACK allocator |
---|
| 876 | mgr->first_free_vpn += size; |
---|
| 877 | |
---|
| 878 | // compute base |
---|
| 879 | base = free; |
---|
| 880 | } |
---|
| 881 | else // from zombi_list |
---|
| 882 | { |
---|
| 883 | // get pointer on zombi vseg from zombi_list |
---|
[408] | 884 | vseg = LIST_FIRST( &mgr->zombi_list[index] , vseg_t , zlist ); |
---|
[1] | 885 | |
---|
| 886 | // remove vseg from free-list |
---|
[408] | 887 | list_unlink( &vseg->zlist ); |
---|
[1] | 888 | |
---|
| 889 | // compute base |
---|
| 890 | base = vseg->vpn_base; |
---|
[21] | 891 | } |
---|
| 892 | |
---|
[1] | 893 | // release lock on mmap allocator |
---|
| 894 | spinlock_unlock( &mgr->lock ); |
---|
| 895 | |
---|
| 896 | // returns vpn_base, vpn_size |
---|
| 897 | *vpn_base = base; |
---|
| 898 | *vpn_size = size; |
---|
| 899 | return 0; |
---|
| 900 | |
---|
[204] | 901 | } // end vmm_mmap_alloc() |
---|
| 902 | |
---|
[407] | 903 | //////////////////////////////////////////////// |
---|
| 904 | vseg_t * vmm_create_vseg( process_t * process, |
---|
| 905 | vseg_type_t type, |
---|
| 906 | intptr_t base, |
---|
| 907 | uint32_t size, |
---|
| 908 | uint32_t file_offset, |
---|
| 909 | uint32_t file_size, |
---|
| 910 | xptr_t mapper_xp, |
---|
| 911 | cxy_t cxy ) |
---|
[1] | 912 | { |
---|
| 913 | vseg_t * vseg; // created vseg pointer |
---|
[204] | 914 | vpn_t vpn_base; // first page index |
---|
[1] | 915 | vpn_t vpn_size; // number of pages |
---|
| 916 | error_t error; |
---|
| 917 | |
---|
[438] | 918 | #if DEBUG_VMM_CREATE_VSEG |
---|
[433] | 919 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 920 | if( DEBUG_VMM_CREATE_VSEG < cycle ) |
---|
[433] | 921 | printk("\n[DBG] %s : thread %x enter / process %x / base %x / size %x / %s / cxy %x / cycle %d\n", |
---|
| 922 | __FUNCTION__, CURRENT_THREAD, process->pid, base, size, vseg_type_str(type), cxy, cycle ); |
---|
| 923 | #endif |
---|
[21] | 924 | |
---|
[407] | 925 | // get pointer on VMM |
---|
| 926 | vmm_t * vmm = &process->vmm; |
---|
[21] | 927 | |
---|
[204] | 928 | // compute base, size, vpn_base, vpn_size, depending on vseg type |
---|
[407] | 929 | // we use the VMM specific allocators for "stack", "file", "anon", & "remote" vsegs |
---|
[1] | 930 | if( type == VSEG_TYPE_STACK ) |
---|
| 931 | { |
---|
| 932 | // get vpn_base and vpn_size from STACK allocator |
---|
| 933 | error = vmm_stack_alloc( vmm , &vpn_base , &vpn_size ); |
---|
| 934 | if( error ) |
---|
| 935 | { |
---|
[407] | 936 | printk("\n[ERROR] in %s : no space for stack vseg / process %x in cluster %x\n", |
---|
| 937 | __FUNCTION__ , process->pid , local_cxy ); |
---|
[1] | 938 | return NULL; |
---|
| 939 | } |
---|
| 940 | |
---|
| 941 | // compute vseg base and size from vpn_base and vpn_size |
---|
| 942 | base = vpn_base << CONFIG_PPM_PAGE_SHIFT; |
---|
| 943 | size = vpn_size << CONFIG_PPM_PAGE_SHIFT; |
---|
| 944 | } |
---|
[21] | 945 | else if( (type == VSEG_TYPE_ANON) || |
---|
| 946 | (type == VSEG_TYPE_FILE) || |
---|
[1] | 947 | (type == VSEG_TYPE_REMOTE) ) |
---|
| 948 | { |
---|
| 949 | // get vpn_base and vpn_size from MMAP allocator |
---|
| 950 | vpn_t npages = size >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 951 | error = vmm_mmap_alloc( vmm , npages , &vpn_base , &vpn_size ); |
---|
| 952 | if( error ) |
---|
| 953 | { |
---|
| 954 | printk("\n[ERROR] in %s : no vspace for mmap vseg / process %x in cluster %x\n", |
---|
| 955 | __FUNCTION__ , process->pid , local_cxy ); |
---|
| 956 | return NULL; |
---|
| 957 | } |
---|
| 958 | |
---|
| 959 | // compute vseg base and size from vpn_base and vpn_size |
---|
| 960 | base = vpn_base << CONFIG_PPM_PAGE_SHIFT; |
---|
| 961 | size = vpn_size << CONFIG_PPM_PAGE_SHIFT; |
---|
| 962 | } |
---|
| 963 | else |
---|
| 964 | { |
---|
[204] | 965 | uint32_t vpn_min = base >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 966 | uint32_t vpn_max = (base + size - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 967 | |
---|
| 968 | vpn_base = vpn_min; |
---|
| 969 | vpn_size = vpn_max - vpn_min + 1; |
---|
[1] | 970 | } |
---|
| 971 | |
---|
| 972 | // check collisions |
---|
| 973 | vseg = vmm_check_conflict( process , vpn_base , vpn_size ); |
---|
| 974 | if( vseg != NULL ) |
---|
| 975 | { |
---|
[21] | 976 | printk("\n[ERROR] in %s for process %x : new vseg [vpn_base = %x / vpn_size = %x]\n" |
---|
[1] | 977 | " overlap existing vseg [vpn_base = %x / vpn_size = %x]\n", |
---|
[407] | 978 | __FUNCTION__ , process->pid, vpn_base, vpn_size, vseg->vpn_base, vseg->vpn_size ); |
---|
[1] | 979 | return NULL; |
---|
| 980 | } |
---|
| 981 | |
---|
| 982 | // allocate physical memory for vseg descriptor |
---|
| 983 | vseg = vseg_alloc(); |
---|
| 984 | if( vseg == NULL ) |
---|
| 985 | { |
---|
| 986 | printk("\n[ERROR] in %s for process %x : cannot allocate memory for vseg\n", |
---|
[407] | 987 | __FUNCTION__ , process->pid ); |
---|
[1] | 988 | return NULL; |
---|
| 989 | } |
---|
| 990 | |
---|
| 991 | // initialize vseg descriptor |
---|
[407] | 992 | vseg_init( vseg, |
---|
| 993 | type, |
---|
| 994 | base, |
---|
| 995 | size, |
---|
| 996 | vpn_base, |
---|
| 997 | vpn_size, |
---|
| 998 | file_offset, |
---|
| 999 | file_size, |
---|
| 1000 | mapper_xp, |
---|
| 1001 | cxy ); |
---|
[1] | 1002 | |
---|
[408] | 1003 | // attach vseg to VSL |
---|
| 1004 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 1005 | remote_rwlock_wr_lock( lock_xp ); |
---|
[1] | 1006 | vseg_attach( vmm , vseg ); |
---|
[408] | 1007 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 1008 | |
---|
[438] | 1009 | #if DEBUG_VMM_CREATE_VSEG |
---|
[433] | 1010 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1011 | if( DEBUG_VMM_CREATE_VSEG < cycle ) |
---|
[433] | 1012 | printk("\n[DBG] %s : thread %x exit / process %x / %s / cxy %x / cycle %d\n", |
---|
| 1013 | __FUNCTION__, CURRENT_THREAD, process->pid, vseg_type_str(type), cxy, cycle ); |
---|
| 1014 | #endif |
---|
[21] | 1015 | |
---|
[1] | 1016 | return vseg; |
---|
| 1017 | |
---|
[406] | 1018 | } // vmm_create_vseg() |
---|
| 1019 | |
---|
[1] | 1020 | ///////////////////////////////////// |
---|
| 1021 | void vmm_remove_vseg( vseg_t * vseg ) |
---|
| 1022 | { |
---|
| 1023 | // get pointers on calling process and VMM |
---|
| 1024 | thread_t * this = CURRENT_THREAD; |
---|
| 1025 | vmm_t * vmm = &this->process->vmm; |
---|
| 1026 | uint32_t type = vseg->type; |
---|
| 1027 | |
---|
[408] | 1028 | // detach vseg from VSL |
---|
| 1029 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 1030 | remote_rwlock_wr_lock( lock_xp ); |
---|
[473] | 1031 | vseg_detach( vseg ); |
---|
[408] | 1032 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 1033 | |
---|
| 1034 | // release the stack slot to VMM stack allocator if STACK type |
---|
| 1035 | if( type == VSEG_TYPE_STACK ) |
---|
| 1036 | { |
---|
| 1037 | // get pointer on stack allocator |
---|
| 1038 | stack_mgr_t * mgr = &vmm->stack_mgr; |
---|
| 1039 | |
---|
| 1040 | // compute slot index |
---|
| 1041 | uint32_t index = ((vseg->vpn_base - mgr->vpn_base - 1) / CONFIG_VMM_STACK_SIZE); |
---|
| 1042 | |
---|
| 1043 | // update stacks_bitmap |
---|
| 1044 | spinlock_lock( &mgr->lock ); |
---|
| 1045 | bitmap_clear( &mgr->bitmap , index ); |
---|
| 1046 | spinlock_unlock( &mgr->lock ); |
---|
| 1047 | } |
---|
| 1048 | |
---|
| 1049 | // release the vseg to VMM mmap allocator if MMAP type |
---|
| 1050 | if( (type == VSEG_TYPE_ANON) || (type == VSEG_TYPE_FILE) || (type == VSEG_TYPE_REMOTE) ) |
---|
| 1051 | { |
---|
| 1052 | // get pointer on mmap allocator |
---|
| 1053 | mmap_mgr_t * mgr = &vmm->mmap_mgr; |
---|
| 1054 | |
---|
| 1055 | // compute zombi_list index |
---|
| 1056 | uint32_t index = bits_log2( vseg->vpn_size ); |
---|
| 1057 | |
---|
| 1058 | // update zombi_list |
---|
| 1059 | spinlock_lock( &mgr->lock ); |
---|
[408] | 1060 | list_add_first( &mgr->zombi_list[index] , &vseg->zlist ); |
---|
[1] | 1061 | spinlock_unlock( &mgr->lock ); |
---|
| 1062 | } |
---|
| 1063 | |
---|
| 1064 | // release physical memory allocated for vseg descriptor if no MMAP type |
---|
| 1065 | if( (type != VSEG_TYPE_ANON) && (type != VSEG_TYPE_FILE) && (type != VSEG_TYPE_REMOTE) ) |
---|
| 1066 | { |
---|
| 1067 | vseg_free( vseg ); |
---|
| 1068 | } |
---|
[407] | 1069 | } // end vmm_remove_vseg() |
---|
[1] | 1070 | |
---|
| 1071 | ///////////////////////////////////////// |
---|
| 1072 | void vmm_unmap_vseg( process_t * process, |
---|
| 1073 | vseg_t * vseg ) |
---|
| 1074 | { |
---|
[21] | 1075 | vpn_t vpn; // VPN of current PTE |
---|
| 1076 | vpn_t vpn_min; // VPN of first PTE |
---|
[1] | 1077 | vpn_t vpn_max; // VPN of last PTE (excluded) |
---|
[409] | 1078 | ppn_t ppn; // current PTE ppn value |
---|
| 1079 | uint32_t attr; // current PTE attributes |
---|
| 1080 | kmem_req_t req; // request to release memory |
---|
| 1081 | xptr_t page_xp; // extended pointer on page descriptor |
---|
| 1082 | cxy_t page_cxy; // page descriptor cluster |
---|
| 1083 | page_t * page_ptr; // page descriptor pointer |
---|
[433] | 1084 | xptr_t forks_xp; // extended pointer on pending forks counter |
---|
[469] | 1085 | xptr_t lock_xp; // extended pointer on lock protecting forks counter |
---|
| 1086 | uint32_t forks; // actual number of pendinf forks |
---|
[1] | 1087 | |
---|
[438] | 1088 | #if DEBUG_VMM_UNMAP_VSEG |
---|
[433] | 1089 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1090 | if( DEBUG_VMM_UNMAP_VSEG < cycle ) |
---|
[433] | 1091 | printk("\n[DBG] %s : thread %x enter / process %x / vseg %s / base %x / cycle %d\n", |
---|
| 1092 | __FUNCTION__, CURRENT_THREAD, process->pid, vseg_type_str( vseg->type ), vseg->vpn_base, cycle ); |
---|
| 1093 | #endif |
---|
[409] | 1094 | |
---|
[433] | 1095 | // get pointer on local GPT |
---|
[1] | 1096 | gpt_t * gpt = &process->vmm.gpt; |
---|
| 1097 | |
---|
| 1098 | // loop on pages in vseg |
---|
| 1099 | vpn_min = vseg->vpn_base; |
---|
| 1100 | vpn_max = vpn_min + vseg->vpn_size; |
---|
| 1101 | for( vpn = vpn_min ; vpn < vpn_max ; vpn++ ) |
---|
| 1102 | { |
---|
[409] | 1103 | // get GPT entry |
---|
| 1104 | hal_gpt_get_pte( gpt , vpn , &attr , &ppn ); |
---|
| 1105 | |
---|
| 1106 | if( attr & GPT_MAPPED ) // entry is mapped |
---|
| 1107 | { |
---|
[437] | 1108 | |
---|
[438] | 1109 | #if( DEBUG_VMM_UNMAP_VSEG & 1 ) |
---|
| 1110 | if( DEBUG_VMM_UNMAP_VSEG < cycle ) |
---|
[437] | 1111 | printk("- vpn %x / ppn %x\n" , vpn , ppn ); |
---|
| 1112 | #endif |
---|
| 1113 | |
---|
[409] | 1114 | // check small page |
---|
[492] | 1115 | assert( (attr & GPT_SMALL) , |
---|
[409] | 1116 | "an user vseg must use small pages" ); |
---|
| 1117 | |
---|
[433] | 1118 | // unmap GPT entry in all GPT copies |
---|
[409] | 1119 | hal_gpt_reset_pte( gpt , vpn ); |
---|
| 1120 | |
---|
[433] | 1121 | // handle pending forks counter if |
---|
| 1122 | // 1) not identity mapped |
---|
| 1123 | // 2) running in reference cluster |
---|
| 1124 | if( ((vseg->flags & VSEG_IDENT) == 0) && |
---|
| 1125 | (GET_CXY( process->ref_xp ) == local_cxy) ) |
---|
[409] | 1126 | { |
---|
[433] | 1127 | // get extended pointer on physical page descriptor |
---|
[409] | 1128 | page_xp = ppm_ppn2page( ppn ); |
---|
| 1129 | page_cxy = GET_CXY( page_xp ); |
---|
[433] | 1130 | page_ptr = GET_PTR( page_xp ); |
---|
[409] | 1131 | |
---|
[469] | 1132 | // get extended pointers on forks and lock fields |
---|
| 1133 | forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
| 1134 | lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
[433] | 1135 | |
---|
[469] | 1136 | // get lock protecting page descriptor |
---|
| 1137 | remote_spinlock_lock( lock_xp ); |
---|
| 1138 | |
---|
[433] | 1139 | // get pending forks counter |
---|
[469] | 1140 | forks = hal_remote_lw( forks_xp ); |
---|
[433] | 1141 | |
---|
[469] | 1142 | if( forks ) // decrement pending forks counter |
---|
[409] | 1143 | { |
---|
[433] | 1144 | hal_remote_atomic_add( forks_xp , -1 ); |
---|
| 1145 | } |
---|
| 1146 | else // release physical page to relevant cluster |
---|
[409] | 1147 | { |
---|
[433] | 1148 | if( page_cxy == local_cxy ) // local cluster |
---|
| 1149 | { |
---|
| 1150 | req.type = KMEM_PAGE; |
---|
| 1151 | req.ptr = page_ptr; |
---|
| 1152 | kmem_free( &req ); |
---|
| 1153 | } |
---|
| 1154 | else // remote cluster |
---|
| 1155 | { |
---|
| 1156 | rpc_pmem_release_pages_client( page_cxy , page_ptr ); |
---|
| 1157 | } |
---|
[409] | 1158 | } |
---|
[433] | 1159 | |
---|
[469] | 1160 | // release lock protecting page descriptor |
---|
| 1161 | remote_spinlock_unlock( lock_xp ); |
---|
[409] | 1162 | } |
---|
| 1163 | } |
---|
[1] | 1164 | } |
---|
[433] | 1165 | |
---|
[438] | 1166 | #if DEBUG_VMM_UNMAP_VSEG |
---|
[433] | 1167 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1168 | if( DEBUG_VMM_UNMAP_VSEG < cycle ) |
---|
[433] | 1169 | printk("\n[DBG] %s : thread %x exit / process %x / vseg %s / base %x / cycle %d\n", |
---|
| 1170 | __FUNCTION__, CURRENT_THREAD, process->pid, vseg_type_str( vseg->type ), vseg->vpn_base, cycle ); |
---|
| 1171 | #endif |
---|
| 1172 | |
---|
[409] | 1173 | } // end vmm_unmap_vseg() |
---|
[1] | 1174 | |
---|
[407] | 1175 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[440] | 1176 | // This low-level static function is called by the vmm_get_vseg(), vmm_get_pte(), |
---|
| 1177 | // and vmm_resize_vseg() functions. It scan the local VSL to find the unique vseg |
---|
| 1178 | // containing a given virtual address. |
---|
[407] | 1179 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 1180 | // @ vmm : pointer on the process VMM. |
---|
| 1181 | // @ vaddr : virtual address. |
---|
| 1182 | // @ return vseg pointer if success / return NULL if not found. |
---|
[407] | 1183 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
[406] | 1184 | static vseg_t * vseg_from_vaddr( vmm_t * vmm, |
---|
| 1185 | intptr_t vaddr ) |
---|
| 1186 | { |
---|
[408] | 1187 | xptr_t iter_xp; |
---|
| 1188 | xptr_t vseg_xp; |
---|
| 1189 | vseg_t * vseg; |
---|
[406] | 1190 | |
---|
[408] | 1191 | // get extended pointers on VSL lock and root |
---|
| 1192 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
| 1193 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
---|
[406] | 1194 | |
---|
[408] | 1195 | // get lock protecting the VSL |
---|
| 1196 | remote_rwlock_rd_lock( lock_xp ); |
---|
| 1197 | |
---|
| 1198 | // scan the list of vsegs in VSL |
---|
| 1199 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[406] | 1200 | { |
---|
[408] | 1201 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
---|
[433] | 1202 | vseg = GET_PTR( vseg_xp ); |
---|
[408] | 1203 | if( (vaddr >= vseg->min) && (vaddr < vseg->max) ) |
---|
| 1204 | { |
---|
| 1205 | // return success |
---|
| 1206 | remote_rwlock_rd_unlock( lock_xp ); |
---|
| 1207 | return vseg; |
---|
| 1208 | } |
---|
[406] | 1209 | } |
---|
| 1210 | |
---|
[408] | 1211 | // return failure |
---|
| 1212 | remote_rwlock_rd_unlock( lock_xp ); |
---|
| 1213 | return NULL; |
---|
[406] | 1214 | |
---|
[408] | 1215 | } // end vseg_from_vaddr() |
---|
[406] | 1216 | |
---|
[1] | 1217 | ///////////////////////////////////////////// |
---|
| 1218 | error_t vmm_resize_vseg( process_t * process, |
---|
| 1219 | intptr_t base, |
---|
| 1220 | intptr_t size ) |
---|
| 1221 | { |
---|
[406] | 1222 | error_t error; |
---|
| 1223 | vseg_t * new; |
---|
| 1224 | vpn_t vpn_min; |
---|
| 1225 | vpn_t vpn_max; |
---|
[1] | 1226 | |
---|
| 1227 | // get pointer on process VMM |
---|
| 1228 | vmm_t * vmm = &process->vmm; |
---|
| 1229 | |
---|
| 1230 | intptr_t addr_min = base; |
---|
| 1231 | intptr_t addr_max = base + size; |
---|
| 1232 | |
---|
| 1233 | // get pointer on vseg |
---|
[406] | 1234 | vseg_t * vseg = vseg_from_vaddr( vmm , base ); |
---|
[1] | 1235 | |
---|
| 1236 | if( vseg == NULL) return EINVAL; |
---|
[21] | 1237 | |
---|
[408] | 1238 | // get extended pointer on VSL lock |
---|
| 1239 | xptr_t lock_xp = XPTR( local_cxy , &vmm->vsegs_lock ); |
---|
[21] | 1240 | |
---|
[408] | 1241 | // get lock protecting VSL |
---|
| 1242 | remote_rwlock_wr_lock( lock_xp ); |
---|
| 1243 | |
---|
[1] | 1244 | if( (vseg->min > addr_min) || (vseg->max < addr_max) ) // region not included in vseg |
---|
| 1245 | { |
---|
| 1246 | error = EINVAL; |
---|
| 1247 | } |
---|
| 1248 | else if( (vseg->min == addr_min) && (vseg->max == addr_max) ) // vseg must be removed |
---|
| 1249 | { |
---|
| 1250 | vmm_remove_vseg( vseg ); |
---|
| 1251 | error = 0; |
---|
| 1252 | } |
---|
[406] | 1253 | else if( vseg->min == addr_min ) // vseg must be resized |
---|
[1] | 1254 | { |
---|
[406] | 1255 | // update vseg base address |
---|
| 1256 | vseg->min = addr_max; |
---|
| 1257 | |
---|
| 1258 | // update vpn_base and vpn_size |
---|
| 1259 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1260 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1261 | vseg->vpn_base = vpn_min; |
---|
| 1262 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1263 | error = 0; |
---|
[1] | 1264 | } |
---|
[406] | 1265 | else if( vseg->max == addr_max ) // vseg must be resized |
---|
[1] | 1266 | { |
---|
[406] | 1267 | // update vseg max address |
---|
| 1268 | vseg->max = addr_min; |
---|
| 1269 | |
---|
| 1270 | // update vpn_base and vpn_size |
---|
| 1271 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1272 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1273 | vseg->vpn_base = vpn_min; |
---|
| 1274 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1275 | error = 0; |
---|
[1] | 1276 | } |
---|
[406] | 1277 | else // vseg cut in three regions |
---|
[1] | 1278 | { |
---|
[406] | 1279 | // resize existing vseg |
---|
| 1280 | vseg->max = addr_min; |
---|
| 1281 | |
---|
| 1282 | // update vpn_base and vpn_size |
---|
| 1283 | vpn_min = vseg->min >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1284 | vpn_max = (vseg->max - 1) >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 1285 | vseg->vpn_base = vpn_min; |
---|
| 1286 | vseg->vpn_size = vpn_max - vpn_min + 1; |
---|
| 1287 | |
---|
| 1288 | // create new vseg |
---|
[407] | 1289 | new = vmm_create_vseg( process, |
---|
| 1290 | vseg->type, |
---|
| 1291 | addr_min, |
---|
| 1292 | (vseg->max - addr_max), |
---|
| 1293 | vseg->file_offset, |
---|
| 1294 | vseg->file_size, |
---|
| 1295 | vseg->mapper_xp, |
---|
| 1296 | vseg->cxy ); |
---|
| 1297 | |
---|
[406] | 1298 | if( new == NULL ) error = EINVAL; |
---|
| 1299 | else error = 0; |
---|
[1] | 1300 | } |
---|
| 1301 | |
---|
| 1302 | // release VMM lock |
---|
[408] | 1303 | remote_rwlock_wr_unlock( lock_xp ); |
---|
[1] | 1304 | |
---|
| 1305 | return error; |
---|
| 1306 | |
---|
[406] | 1307 | } // vmm_resize_vseg() |
---|
| 1308 | |
---|
[1] | 1309 | /////////////////////////////////////////// |
---|
[388] | 1310 | error_t vmm_get_vseg( process_t * process, |
---|
[394] | 1311 | intptr_t vaddr, |
---|
[388] | 1312 | vseg_t ** found_vseg ) |
---|
[1] | 1313 | { |
---|
[440] | 1314 | xptr_t vseg_xp; |
---|
| 1315 | error_t error; |
---|
| 1316 | vseg_t * vseg; |
---|
| 1317 | vmm_t * vmm; |
---|
[1] | 1318 | |
---|
[440] | 1319 | // get pointer on local VMM |
---|
| 1320 | vmm = &process->vmm; |
---|
[1] | 1321 | |
---|
[440] | 1322 | // try to get vseg from local VMM |
---|
| 1323 | vseg = vseg_from_vaddr( vmm , vaddr ); |
---|
| 1324 | |
---|
[388] | 1325 | if( vseg == NULL ) // vseg not found in local cluster => try to get it from ref |
---|
| 1326 | { |
---|
| 1327 | // get extended pointer on reference process |
---|
| 1328 | xptr_t ref_xp = process->ref_xp; |
---|
[1] | 1329 | |
---|
[388] | 1330 | // get cluster and local pointer on reference process |
---|
| 1331 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
[433] | 1332 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[388] | 1333 | |
---|
| 1334 | if( local_cxy == ref_cxy ) return -1; // local cluster is the reference |
---|
| 1335 | |
---|
| 1336 | // get extended pointer on reference vseg |
---|
[394] | 1337 | rpc_vmm_get_vseg_client( ref_cxy , ref_ptr , vaddr , &vseg_xp , &error ); |
---|
[388] | 1338 | |
---|
[440] | 1339 | if( error ) return -1; // vseg not found => illegal user vaddr |
---|
[388] | 1340 | |
---|
| 1341 | // allocate a vseg in local cluster |
---|
| 1342 | vseg = vseg_alloc(); |
---|
| 1343 | |
---|
[440] | 1344 | if( vseg == NULL ) return -1; // cannot allocate a local vseg |
---|
[388] | 1345 | |
---|
| 1346 | // initialise local vseg from reference |
---|
| 1347 | vseg_init_from_ref( vseg , vseg_xp ); |
---|
| 1348 | |
---|
| 1349 | // register local vseg in local VMM |
---|
[406] | 1350 | vseg_attach( &process->vmm , vseg ); |
---|
[388] | 1351 | } |
---|
| 1352 | |
---|
| 1353 | // success |
---|
| 1354 | *found_vseg = vseg; |
---|
[394] | 1355 | return 0; |
---|
[388] | 1356 | |
---|
| 1357 | } // end vmm_get_vseg() |
---|
| 1358 | |
---|
[407] | 1359 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1360 | // This static function compute the target cluster to allocate a physical page |
---|
| 1361 | // for a given <vpn> in a given <vseg>, allocates the page (with an RPC if required) |
---|
| 1362 | // and returns an extended pointer on the allocated page descriptor. |
---|
| 1363 | // The vseg cannot have the FILE type. |
---|
| 1364 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1365 | static xptr_t vmm_page_allocate( vseg_t * vseg, |
---|
| 1366 | vpn_t vpn ) |
---|
| 1367 | { |
---|
[433] | 1368 | |
---|
[438] | 1369 | #if DEBUG_VMM_ALLOCATE_PAGE |
---|
| 1370 | if( DEBUG_VMM_ALLOCATE_PAGE < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1371 | printk("\n[DBG] in %s : thread %x enter for vpn %x\n", |
---|
| 1372 | __FUNCTION__ , CURRENT_THREAD, vpn ); |
---|
| 1373 | #endif |
---|
| 1374 | |
---|
[407] | 1375 | // compute target cluster |
---|
| 1376 | page_t * page_ptr; |
---|
| 1377 | cxy_t page_cxy; |
---|
| 1378 | kmem_req_t req; |
---|
| 1379 | |
---|
| 1380 | uint32_t type = vseg->type; |
---|
| 1381 | uint32_t flags = vseg->flags; |
---|
| 1382 | |
---|
[492] | 1383 | assert( ( type != VSEG_TYPE_FILE ) , "illegal vseg type\n" ); |
---|
[407] | 1384 | |
---|
| 1385 | if( flags & VSEG_DISTRIB ) // distributed => cxy depends on vpn LSB |
---|
| 1386 | { |
---|
[561] | 1387 | uint32_t x_size = LOCAL_CLUSTER->x_size; |
---|
| 1388 | uint32_t y_size = LOCAL_CLUSTER->y_size; |
---|
[407] | 1389 | uint32_t y_width = LOCAL_CLUSTER->y_width; |
---|
[561] | 1390 | uint32_t index = vpn & ((x_size * y_size) - 1); |
---|
| 1391 | uint32_t x = index / y_size; |
---|
| 1392 | uint32_t y = index % y_size; |
---|
| 1393 | |
---|
| 1394 | // If the cluster selected from VPN's LSBs is empty, then we select one randomly |
---|
| 1395 | // cluster_random_select() ensures that its randomly selected cluster is not empty |
---|
| 1396 | if ( cluster_info_is_active( LOCAL_CLUSTER->cluster_info[x][y] ) == 0 ) { |
---|
| 1397 | cxy_t cxy = cluster_random_select(); |
---|
| 1398 | x = ( ( cxy >> y_width ) & 0xF); |
---|
| 1399 | y = ( cxy & 0xF ); |
---|
| 1400 | } |
---|
| 1401 | page_cxy = ( x << y_width ) + y; |
---|
[407] | 1402 | } |
---|
| 1403 | else // other cases => cxy specified in vseg |
---|
| 1404 | { |
---|
[561] | 1405 | page_cxy = vseg->cxy; |
---|
[407] | 1406 | } |
---|
| 1407 | |
---|
| 1408 | // allocate a physical page from target cluster |
---|
| 1409 | if( page_cxy == local_cxy ) // target cluster is the local cluster |
---|
| 1410 | { |
---|
| 1411 | req.type = KMEM_PAGE; |
---|
| 1412 | req.size = 0; |
---|
| 1413 | req.flags = AF_NONE; |
---|
| 1414 | page_ptr = (page_t *)kmem_alloc( &req ); |
---|
| 1415 | } |
---|
| 1416 | else // target cluster is not the local cluster |
---|
| 1417 | { |
---|
| 1418 | rpc_pmem_get_pages_client( page_cxy , 0 , &page_ptr ); |
---|
| 1419 | } |
---|
| 1420 | |
---|
[438] | 1421 | #if DEBUG_VMM_ALLOCATE_PAGE |
---|
| 1422 | if( DEBUG_VMM_ALLOCATE_PAGE < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1423 | printk("\n[DBG] in %s : thread %x exit for vpn = %d / ppn = %x\n", |
---|
| 1424 | __FUNCTION__ , CURRENT_THREAD, vpn, ppm_page2ppn( XPTR( page_cxy , page_ptr ) ) ); |
---|
| 1425 | #endif |
---|
| 1426 | |
---|
[407] | 1427 | if( page_ptr == NULL ) return XPTR_NULL; |
---|
| 1428 | else return XPTR( page_cxy , page_ptr ); |
---|
| 1429 | |
---|
| 1430 | } // end vmm_page_allocate() |
---|
| 1431 | |
---|
[313] | 1432 | //////////////////////////////////////// |
---|
| 1433 | error_t vmm_get_one_ppn( vseg_t * vseg, |
---|
| 1434 | vpn_t vpn, |
---|
| 1435 | ppn_t * ppn ) |
---|
| 1436 | { |
---|
| 1437 | error_t error; |
---|
[407] | 1438 | xptr_t page_xp; // extended pointer on physical page descriptor |
---|
[313] | 1439 | page_t * page_ptr; // local pointer on physical page descriptor |
---|
[406] | 1440 | uint32_t index; // missing page index in vseg mapper |
---|
| 1441 | uint32_t type; // vseg type; |
---|
[313] | 1442 | |
---|
[406] | 1443 | type = vseg->type; |
---|
| 1444 | index = vpn - vseg->vpn_base; |
---|
[313] | 1445 | |
---|
[438] | 1446 | #if DEBUG_VMM_GET_ONE_PPN |
---|
[441] | 1447 | thread_t * this = CURRENT_THREAD; |
---|
[469] | 1448 | if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1449 | printk("\n[DBG] %s : thread %x enter for vpn = %x / type = %s / index = %d\n", |
---|
[441] | 1450 | __FUNCTION__, this, vpn, vseg_type_str(type), index ); |
---|
[433] | 1451 | #endif |
---|
[313] | 1452 | |
---|
[406] | 1453 | // FILE type : get the physical page from the file mapper |
---|
[313] | 1454 | if( type == VSEG_TYPE_FILE ) |
---|
| 1455 | { |
---|
[406] | 1456 | // get extended pointer on mapper |
---|
[407] | 1457 | xptr_t mapper_xp = vseg->mapper_xp; |
---|
[313] | 1458 | |
---|
[492] | 1459 | assert( (mapper_xp != XPTR_NULL), |
---|
[406] | 1460 | "mapper not defined for a FILE vseg\n" ); |
---|
| 1461 | |
---|
| 1462 | // get mapper cluster and local pointer |
---|
| 1463 | cxy_t mapper_cxy = GET_CXY( mapper_xp ); |
---|
[433] | 1464 | mapper_t * mapper_ptr = GET_PTR( mapper_xp ); |
---|
[406] | 1465 | |
---|
[313] | 1466 | // get page descriptor from mapper |
---|
| 1467 | if( mapper_cxy == local_cxy ) // mapper is local |
---|
| 1468 | { |
---|
| 1469 | page_ptr = mapper_get_page( mapper_ptr , index ); |
---|
| 1470 | } |
---|
| 1471 | else // mapper is remote |
---|
| 1472 | { |
---|
| 1473 | rpc_mapper_get_page_client( mapper_cxy , mapper_ptr , index , &page_ptr ); |
---|
| 1474 | } |
---|
| 1475 | |
---|
| 1476 | if ( page_ptr == NULL ) return EINVAL; |
---|
| 1477 | |
---|
[407] | 1478 | page_xp = XPTR( mapper_cxy , page_ptr ); |
---|
[313] | 1479 | } |
---|
| 1480 | |
---|
[406] | 1481 | // Other types : allocate a physical page from target cluster, |
---|
[407] | 1482 | // as defined by vseg type and vpn value |
---|
[313] | 1483 | else |
---|
| 1484 | { |
---|
[433] | 1485 | // allocate one physical page |
---|
[407] | 1486 | page_xp = vmm_page_allocate( vseg , vpn ); |
---|
[406] | 1487 | |
---|
[407] | 1488 | if( page_xp == XPTR_NULL ) return ENOMEM; |
---|
[313] | 1489 | |
---|
[406] | 1490 | // initialise missing page from .elf file mapper for DATA and CODE types |
---|
[440] | 1491 | // the vseg->mapper_xp field is an extended pointer on the .elf file mapper |
---|
[313] | 1492 | if( (type == VSEG_TYPE_CODE) || (type == VSEG_TYPE_DATA) ) |
---|
| 1493 | { |
---|
[406] | 1494 | // get extended pointer on mapper |
---|
| 1495 | xptr_t mapper_xp = vseg->mapper_xp; |
---|
[313] | 1496 | |
---|
[492] | 1497 | assert( (mapper_xp != XPTR_NULL), |
---|
[406] | 1498 | "mapper not defined for a CODE or DATA vseg\n" ); |
---|
| 1499 | |
---|
| 1500 | // get mapper cluster and local pointer |
---|
| 1501 | cxy_t mapper_cxy = GET_CXY( mapper_xp ); |
---|
[433] | 1502 | mapper_t * mapper_ptr = GET_PTR( mapper_xp ); |
---|
[406] | 1503 | |
---|
| 1504 | // compute missing page offset in vseg |
---|
| 1505 | uint32_t offset = index << CONFIG_PPM_PAGE_SHIFT; |
---|
| 1506 | |
---|
[313] | 1507 | // compute missing page offset in .elf file |
---|
[406] | 1508 | uint32_t elf_offset = vseg->file_offset + offset; |
---|
[313] | 1509 | |
---|
[438] | 1510 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[469] | 1511 | if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1512 | printk("\n[DBG] %s : thread %x for vpn = %x / elf_offset = %x\n", |
---|
[441] | 1513 | __FUNCTION__, this, vpn, elf_offset ); |
---|
[433] | 1514 | #endif |
---|
[313] | 1515 | |
---|
[440] | 1516 | |
---|
[406] | 1517 | // compute extended pointer on page base |
---|
[407] | 1518 | xptr_t base_xp = ppm_page2base( page_xp ); |
---|
[313] | 1519 | |
---|
[406] | 1520 | // file_size (in .elf mapper) can be smaller than vseg_size (BSS) |
---|
| 1521 | uint32_t file_size = vseg->file_size; |
---|
| 1522 | |
---|
| 1523 | if( file_size < offset ) // missing page fully in BSS |
---|
[313] | 1524 | { |
---|
[406] | 1525 | |
---|
[438] | 1526 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[469] | 1527 | if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1528 | printk("\n[DBG] %s : thread%x for vpn = %x / fully in BSS\n", |
---|
[441] | 1529 | __FUNCTION__, this, vpn ); |
---|
[433] | 1530 | #endif |
---|
| 1531 | |
---|
[440] | 1532 | |
---|
[407] | 1533 | if( GET_CXY( page_xp ) == local_cxy ) |
---|
[313] | 1534 | { |
---|
[315] | 1535 | memset( GET_PTR( base_xp ) , 0 , CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1536 | } |
---|
| 1537 | else |
---|
| 1538 | { |
---|
[315] | 1539 | hal_remote_memset( base_xp , 0 , CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1540 | } |
---|
| 1541 | } |
---|
[406] | 1542 | else if( file_size >= (offset + CONFIG_PPM_PAGE_SIZE) ) // fully in mapper |
---|
[315] | 1543 | { |
---|
[406] | 1544 | |
---|
[438] | 1545 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[469] | 1546 | if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1547 | printk("\n[DBG] %s : thread %x, for vpn = %x / fully in mapper\n", |
---|
[441] | 1548 | __FUNCTION__, this, vpn ); |
---|
[433] | 1549 | #endif |
---|
[313] | 1550 | if( mapper_cxy == local_cxy ) |
---|
| 1551 | { |
---|
| 1552 | error = mapper_move_kernel( mapper_ptr, |
---|
| 1553 | true, // to_buffer |
---|
[406] | 1554 | elf_offset, |
---|
[313] | 1555 | base_xp, |
---|
[315] | 1556 | CONFIG_PPM_PAGE_SIZE ); |
---|
[313] | 1557 | } |
---|
| 1558 | else |
---|
| 1559 | { |
---|
| 1560 | rpc_mapper_move_buffer_client( mapper_cxy, |
---|
| 1561 | mapper_ptr, |
---|
| 1562 | true, // to buffer |
---|
| 1563 | false, // kernel buffer |
---|
[406] | 1564 | elf_offset, |
---|
| 1565 | base_xp, |
---|
[315] | 1566 | CONFIG_PPM_PAGE_SIZE, |
---|
[313] | 1567 | &error ); |
---|
| 1568 | } |
---|
| 1569 | if( error ) return EINVAL; |
---|
| 1570 | } |
---|
[406] | 1571 | else // both in mapper and in BSS : |
---|
| 1572 | // - (file_size - offset) bytes from mapper |
---|
| 1573 | // - (page_size + offset - file_size) bytes from BSS |
---|
[313] | 1574 | { |
---|
[406] | 1575 | |
---|
[438] | 1576 | #if (DEBUG_VMM_GET_ONE_PPN & 0x1) |
---|
[469] | 1577 | if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1578 | printk("\n[DBG] %s : thread %x for vpn = %x / both mapper & BSS\n" |
---|
| 1579 | " %d bytes from mapper / %d bytes from BSS\n", |
---|
[441] | 1580 | __FUNCTION__, this, vpn, |
---|
[407] | 1581 | file_size - offset , offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[433] | 1582 | #endif |
---|
[313] | 1583 | // initialize mapper part |
---|
[315] | 1584 | if( mapper_cxy == local_cxy ) |
---|
[313] | 1585 | { |
---|
| 1586 | error = mapper_move_kernel( mapper_ptr, |
---|
[315] | 1587 | true, // to buffer |
---|
[406] | 1588 | elf_offset, |
---|
[313] | 1589 | base_xp, |
---|
[406] | 1590 | file_size - offset ); |
---|
[313] | 1591 | } |
---|
[315] | 1592 | else |
---|
[313] | 1593 | { |
---|
| 1594 | rpc_mapper_move_buffer_client( mapper_cxy, |
---|
| 1595 | mapper_ptr, |
---|
[315] | 1596 | true, // to buffer |
---|
[313] | 1597 | false, // kernel buffer |
---|
[406] | 1598 | elf_offset, |
---|
| 1599 | base_xp, |
---|
| 1600 | file_size - offset, |
---|
[313] | 1601 | &error ); |
---|
| 1602 | } |
---|
| 1603 | if( error ) return EINVAL; |
---|
| 1604 | |
---|
| 1605 | // initialize BSS part |
---|
[407] | 1606 | if( GET_CXY( page_xp ) == local_cxy ) |
---|
[313] | 1607 | { |
---|
[406] | 1608 | memset( GET_PTR( base_xp ) + file_size - offset , 0 , |
---|
| 1609 | offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[313] | 1610 | } |
---|
| 1611 | else |
---|
| 1612 | { |
---|
[406] | 1613 | hal_remote_memset( base_xp + file_size - offset , 0 , |
---|
| 1614 | offset + CONFIG_PPM_PAGE_SIZE - file_size ); |
---|
[313] | 1615 | } |
---|
| 1616 | } |
---|
| 1617 | } // end initialisation for CODE or DATA types |
---|
| 1618 | } |
---|
| 1619 | |
---|
| 1620 | // return ppn |
---|
[407] | 1621 | *ppn = ppm_page2ppn( page_xp ); |
---|
[406] | 1622 | |
---|
[438] | 1623 | #if DEBUG_VMM_GET_ONE_PPN |
---|
[469] | 1624 | if( DEBUG_VMM_GET_ONE_PPN < (uint32_t)hal_get_cycles() ) |
---|
[433] | 1625 | printk("\n[DBG] %s : thread %x exit for vpn = %x / ppn = %x\n", |
---|
[441] | 1626 | __FUNCTION__ , this , vpn , *ppn ); |
---|
[433] | 1627 | #endif |
---|
[406] | 1628 | |
---|
[313] | 1629 | return 0; |
---|
| 1630 | |
---|
| 1631 | } // end vmm_get_one_ppn() |
---|
| 1632 | |
---|
[1] | 1633 | ///////////////////////////////////////// |
---|
| 1634 | error_t vmm_get_pte( process_t * process, |
---|
| 1635 | vpn_t vpn, |
---|
[407] | 1636 | bool_t cow, |
---|
| 1637 | uint32_t * attr, |
---|
| 1638 | ppn_t * ppn ) |
---|
[1] | 1639 | { |
---|
[440] | 1640 | ppn_t old_ppn; // current PTE_PPN |
---|
| 1641 | uint32_t old_attr; // current PTE_ATTR |
---|
| 1642 | ppn_t new_ppn; // new PTE_PPN |
---|
| 1643 | uint32_t new_attr; // new PTE_ATTR |
---|
| 1644 | vmm_t * vmm; |
---|
| 1645 | vseg_t * vseg; |
---|
| 1646 | error_t error; |
---|
[1] | 1647 | |
---|
[441] | 1648 | thread_t * this = CURRENT_THREAD; |
---|
| 1649 | |
---|
[438] | 1650 | #if DEBUG_VMM_GET_PTE |
---|
[441] | 1651 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[469] | 1652 | if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1653 | printk("\n[DBG] %s : thread %x in process %x enter / vpn %x / cow %d / cycle %d\n", |
---|
| 1654 | __FUNCTION__, this->trdid, process->pid, vpn, cow, cycle ); |
---|
[433] | 1655 | #endif |
---|
[406] | 1656 | |
---|
[1] | 1657 | // get VMM pointer |
---|
[440] | 1658 | vmm = &process->vmm; |
---|
[1] | 1659 | |
---|
[440] | 1660 | // get local vseg descriptor |
---|
| 1661 | error = vmm_get_vseg( process, |
---|
| 1662 | ((intptr_t)vpn << CONFIG_PPM_PAGE_SHIFT), |
---|
| 1663 | &vseg ); |
---|
[1] | 1664 | |
---|
[440] | 1665 | // vseg has been checked by the vmm_handle_page_fault() function |
---|
[492] | 1666 | assert( (vseg != NULL) , "vseg undefined / vpn %x\n"); |
---|
[406] | 1667 | |
---|
[438] | 1668 | if( cow ) //////////////// copy_on_write request ////////////////////// |
---|
[440] | 1669 | // get PTE from local GPT |
---|
[438] | 1670 | // allocate a new physical page if there is pending forks, |
---|
| 1671 | // initialize it from old physical page content, |
---|
| 1672 | // update PTE in all GPT copies, |
---|
| 1673 | { |
---|
[440] | 1674 | // access local GPT to get current PTE attributes and PPN |
---|
[438] | 1675 | hal_gpt_get_pte( &vmm->gpt , vpn , &old_attr , &old_ppn ); |
---|
[407] | 1676 | |
---|
[492] | 1677 | assert( (old_attr & GPT_MAPPED), |
---|
| 1678 | "PTE unmapped for a COW exception / vpn %x\n" ); |
---|
[407] | 1679 | |
---|
[438] | 1680 | #if( DEBUG_VMM_GET_PTE & 1 ) |
---|
[469] | 1681 | if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1682 | printk("\n[DBG] %s : thread %x in process %x handling COW for vpn %x\n", |
---|
| 1683 | __FUNCTION__, this->trdid, process->pid, vpn ); |
---|
[433] | 1684 | #endif |
---|
[407] | 1685 | |
---|
[433] | 1686 | // get extended pointer, cluster and local pointer on physical page descriptor |
---|
[408] | 1687 | xptr_t page_xp = ppm_ppn2page( old_ppn ); |
---|
| 1688 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
[433] | 1689 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
[407] | 1690 | |
---|
[469] | 1691 | // get extended pointers on forks and lock field in page descriptor |
---|
| 1692 | xptr_t forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
| 1693 | xptr_t lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
| 1694 | |
---|
| 1695 | // take lock protecting page descriptor |
---|
| 1696 | remote_spinlock_lock( lock_xp ); |
---|
| 1697 | |
---|
[408] | 1698 | // get number of pending forks in page descriptor |
---|
[469] | 1699 | uint32_t forks = hal_remote_lw( forks_xp ); |
---|
[408] | 1700 | |
---|
[433] | 1701 | if( forks ) // pending fork => allocate a new page, copy old to new |
---|
[1] | 1702 | { |
---|
[408] | 1703 | // allocate a new physical page |
---|
| 1704 | page_xp = vmm_page_allocate( vseg , vpn ); |
---|
| 1705 | if( page_xp == XPTR_NULL ) |
---|
| 1706 | { |
---|
| 1707 | printk("\n[ERROR] in %s : no memory / process = %x / vpn = %x\n", |
---|
| 1708 | __FUNCTION__ , process->pid , vpn ); |
---|
| 1709 | return -1; |
---|
| 1710 | } |
---|
[1] | 1711 | |
---|
[408] | 1712 | // compute allocated page PPN |
---|
| 1713 | new_ppn = ppm_page2ppn( page_xp ); |
---|
[406] | 1714 | |
---|
[408] | 1715 | // copy old page content to new page |
---|
| 1716 | xptr_t old_base_xp = ppm_ppn2base( old_ppn ); |
---|
| 1717 | xptr_t new_base_xp = ppm_ppn2base( new_ppn ); |
---|
| 1718 | memcpy( GET_PTR( new_base_xp ), |
---|
| 1719 | GET_PTR( old_base_xp ), |
---|
| 1720 | CONFIG_PPM_PAGE_SIZE ); |
---|
[469] | 1721 | |
---|
| 1722 | // decrement pending forks counter in page descriptor |
---|
| 1723 | hal_remote_atomic_add( forks_xp , -1 ); |
---|
[408] | 1724 | } |
---|
[469] | 1725 | else // no pending fork => keep the existing page |
---|
[408] | 1726 | { |
---|
| 1727 | new_ppn = old_ppn; |
---|
| 1728 | } |
---|
[1] | 1729 | |
---|
[469] | 1730 | // release lock protecting page descriptor |
---|
| 1731 | remote_spinlock_unlock( lock_xp ); |
---|
| 1732 | |
---|
[408] | 1733 | // build new_attr : reset COW and set WRITABLE, |
---|
| 1734 | new_attr = (old_attr | GPT_WRITABLE) & (~GPT_COW); |
---|
[407] | 1735 | |
---|
[408] | 1736 | // update GPT[vpn] for all GPT copies |
---|
[433] | 1737 | vmm_global_update_pte( process, vpn, new_attr, new_ppn ); |
---|
[407] | 1738 | } |
---|
[438] | 1739 | else //////////// page_fault request /////////////////////////// |
---|
[440] | 1740 | // get PTE from local GPT |
---|
[438] | 1741 | // allocate a physical page if it is a true page fault, |
---|
[440] | 1742 | // initialize it if type is FILE, CODE, or DATA, |
---|
[438] | 1743 | // register in reference GPT, but don't update GPT copies |
---|
[407] | 1744 | { |
---|
[440] | 1745 | // access local GPT to get current PTE |
---|
[438] | 1746 | hal_gpt_get_pte( &vmm->gpt , vpn , &old_attr , &old_ppn ); |
---|
| 1747 | |
---|
[408] | 1748 | if( (old_attr & GPT_MAPPED) == 0 ) // true page_fault => map it |
---|
[407] | 1749 | { |
---|
[1] | 1750 | |
---|
[438] | 1751 | #if( DEBUG_VMM_GET_PTE & 1 ) |
---|
[469] | 1752 | if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1753 | printk("\n[DBG] %s : thread %x in process %x handling page fault for vpn %x\n", |
---|
| 1754 | __FUNCTION__, this->trdid, process->pid, vpn ); |
---|
[433] | 1755 | #endif |
---|
[440] | 1756 | // allocate new_ppn, and initialize the new page |
---|
[407] | 1757 | error = vmm_get_one_ppn( vseg , vpn , &new_ppn ); |
---|
| 1758 | if( error ) |
---|
| 1759 | { |
---|
| 1760 | printk("\n[ERROR] in %s : no memory / process = %x / vpn = %x\n", |
---|
| 1761 | __FUNCTION__ , process->pid , vpn ); |
---|
[408] | 1762 | return -1; |
---|
[407] | 1763 | } |
---|
| 1764 | |
---|
[408] | 1765 | // define new_attr from vseg flags |
---|
[407] | 1766 | new_attr = GPT_MAPPED | GPT_SMALL; |
---|
| 1767 | if( vseg->flags & VSEG_USER ) new_attr |= GPT_USER; |
---|
| 1768 | if( vseg->flags & VSEG_WRITE ) new_attr |= GPT_WRITABLE; |
---|
| 1769 | if( vseg->flags & VSEG_EXEC ) new_attr |= GPT_EXECUTABLE; |
---|
| 1770 | if( vseg->flags & VSEG_CACHE ) new_attr |= GPT_CACHABLE; |
---|
| 1771 | |
---|
[408] | 1772 | // register new PTE in reference GPT |
---|
| 1773 | // on demand policy => no update of GPT copies |
---|
| 1774 | error = hal_gpt_set_pte( &vmm->gpt, |
---|
| 1775 | vpn, |
---|
| 1776 | new_attr, |
---|
| 1777 | new_ppn ); |
---|
[407] | 1778 | if( error ) |
---|
| 1779 | { |
---|
| 1780 | printk("\n[ERROR] in %s : cannot update GPT / process = %x / vpn = %x\n", |
---|
| 1781 | __FUNCTION__ , process->pid , vpn ); |
---|
[408] | 1782 | return -1; |
---|
[407] | 1783 | } |
---|
| 1784 | } |
---|
[408] | 1785 | else // mapped in reference GPT => get it |
---|
[1] | 1786 | { |
---|
[408] | 1787 | new_ppn = old_ppn; |
---|
[407] | 1788 | new_attr = old_attr; |
---|
[1] | 1789 | } |
---|
[407] | 1790 | } |
---|
[1] | 1791 | |
---|
[438] | 1792 | #if DEBUG_VMM_GET_PTE |
---|
[433] | 1793 | cycle = (uint32_t)hal_get_cycles(); |
---|
[469] | 1794 | if( DEBUG_VMM_GET_PTE < cycle ) |
---|
| 1795 | printk("\n[DBG] %s : thread %x in process %x exit / vpn %x / ppn %x / attr %x / cycle %d\n", |
---|
| 1796 | __FUNCTION__, this->trdid, process->pid, vpn, new_ppn, new_attr, cycle ); |
---|
[433] | 1797 | #endif |
---|
[406] | 1798 | |
---|
[438] | 1799 | // return PPN and flags |
---|
[407] | 1800 | *ppn = new_ppn; |
---|
| 1801 | *attr = new_attr; |
---|
[1] | 1802 | return 0; |
---|
| 1803 | |
---|
[313] | 1804 | } // end vmm_get_pte() |
---|
| 1805 | |
---|
[1] | 1806 | /////////////////////////////////////////////////// |
---|
| 1807 | error_t vmm_handle_page_fault( process_t * process, |
---|
[440] | 1808 | vpn_t vpn, |
---|
| 1809 | bool_t is_cow ) |
---|
[1] | 1810 | { |
---|
| 1811 | uint32_t attr; // missing page attributes |
---|
[21] | 1812 | ppn_t ppn; // missing page PPN |
---|
[440] | 1813 | vseg_t * vseg; // vseg containing vpn |
---|
| 1814 | uint32_t type; // vseg type |
---|
| 1815 | cxy_t ref_cxy; // reference cluster for missing vpn |
---|
| 1816 | process_t * ref_ptr; // reference process for missing vpn |
---|
[407] | 1817 | error_t error; |
---|
[1] | 1818 | |
---|
[440] | 1819 | thread_t * this = CURRENT_THREAD; |
---|
| 1820 | |
---|
| 1821 | #if DEBUG_VMM_HANDLE_PAGE_FAULT |
---|
[435] | 1822 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[469] | 1823 | if( DEBUG_VMM_HANDLE_PAGE_FAULT < cycle ) |
---|
[441] | 1824 | printk("\n[DBG] %s : thread %x in process %x enter for vpn %x / core[%x,%d] / cycle %d\n", |
---|
| 1825 | __FUNCTION__, this, process->pid, vpn, local_cxy, this->core->lid, cycle ); |
---|
[435] | 1826 | #endif |
---|
| 1827 | |
---|
[440] | 1828 | // get local vseg (access reference VSL if required) |
---|
| 1829 | error = vmm_get_vseg( process , vpn<<CONFIG_PPM_PAGE_SHIFT , &vseg ); |
---|
[1] | 1830 | |
---|
[440] | 1831 | if( error ) |
---|
[1] | 1832 | { |
---|
[440] | 1833 | printk("\n[ERROR] in %s : vpn %x / process %x / thread %x / core[%x,%d] / cycle %d\n", |
---|
| 1834 | __FUNCTION__, vpn, process->pid, this->trdid, local_cxy, this->core->lid, |
---|
| 1835 | (uint32_t)hal_get_cycles() ); |
---|
| 1836 | return error; |
---|
| 1837 | } |
---|
[407] | 1838 | |
---|
[440] | 1839 | // get segment type |
---|
| 1840 | type = vseg->type; |
---|
[407] | 1841 | |
---|
[440] | 1842 | // get reference process cluster and local pointer |
---|
| 1843 | // for private vsegs (CODE and DATA type), |
---|
| 1844 | // the reference is the local process descriptor. |
---|
| 1845 | if( (type == VSEG_TYPE_STACK) || (type == VSEG_TYPE_CODE) ) |
---|
| 1846 | { |
---|
| 1847 | ref_cxy = local_cxy; |
---|
| 1848 | ref_ptr = process; |
---|
[1] | 1849 | } |
---|
[440] | 1850 | else |
---|
[1] | 1851 | { |
---|
[440] | 1852 | ref_cxy = GET_CXY( process->ref_xp ); |
---|
| 1853 | ref_ptr = GET_PTR( process->ref_xp ); |
---|
[1] | 1854 | } |
---|
| 1855 | |
---|
[440] | 1856 | // get missing PTE attributes and PPN |
---|
| 1857 | if( local_cxy != ref_cxy ) |
---|
[407] | 1858 | { |
---|
[441] | 1859 | |
---|
| 1860 | #if DEBUG_VMM_HANDLE_PAGE_FAULT |
---|
[469] | 1861 | if( DEBUG_VMM_HANDLE_PAGE_FAULT < cycle ) |
---|
[441] | 1862 | printk("\n[DBG] %s : thread %x in process %x call RPC_VMM_GET_PTE\n", |
---|
| 1863 | __FUNCTION__, this, process->pid ); |
---|
| 1864 | #endif |
---|
| 1865 | |
---|
[407] | 1866 | rpc_vmm_get_pte_client( ref_cxy, |
---|
| 1867 | ref_ptr, |
---|
| 1868 | vpn, |
---|
[440] | 1869 | is_cow, |
---|
[407] | 1870 | &attr, |
---|
| 1871 | &ppn, |
---|
| 1872 | &error ); |
---|
| 1873 | |
---|
| 1874 | // get local VMM pointer |
---|
| 1875 | vmm_t * vmm = &process->vmm; |
---|
| 1876 | |
---|
| 1877 | // update local GPT |
---|
[408] | 1878 | error |= hal_gpt_set_pte( &vmm->gpt, |
---|
| 1879 | vpn, |
---|
| 1880 | attr, |
---|
| 1881 | ppn ); |
---|
[407] | 1882 | } |
---|
| 1883 | else // local cluster is the reference cluster |
---|
| 1884 | { |
---|
| 1885 | error = vmm_get_pte( process, |
---|
| 1886 | vpn, |
---|
[440] | 1887 | is_cow, |
---|
[407] | 1888 | &attr, |
---|
| 1889 | &ppn ); |
---|
| 1890 | } |
---|
| 1891 | |
---|
[440] | 1892 | #if DEBUG_VMM_HANDLE_PAGE_FAULT |
---|
[435] | 1893 | cycle = (uint32_t)hal_get_cycles(); |
---|
[469] | 1894 | if( DEBUG_VMM_HANDLE_PAGE_FAULT < cycle ) |
---|
[441] | 1895 | printk("\n[DBG] %s : thread %x in process %x exit for vpn %x / core[%x,%d] / cycle %d\n", |
---|
| 1896 | __FUNCTION__, this, process->pid, vpn, local_cxy, this->core->lid, cycle ); |
---|
[435] | 1897 | #endif |
---|
| 1898 | |
---|
[407] | 1899 | return error; |
---|
| 1900 | |
---|
[441] | 1901 | } // end vmm_handle_page_fault() |
---|
[407] | 1902 | |
---|
[441] | 1903 | |
---|
| 1904 | |
---|
| 1905 | |
---|
| 1906 | |
---|
| 1907 | |
---|
| 1908 | |
---|
| 1909 | |
---|
| 1910 | |
---|
[440] | 1911 | /* deprecated April 2018 [AG] |
---|
| 1912 | |
---|
| 1913 | error_t vmm_v2p_translate( process_t * process, |
---|
| 1914 | void * ptr, |
---|
| 1915 | paddr_t * paddr ) |
---|
[1] | 1916 | { |
---|
[21] | 1917 | // access page table |
---|
[1] | 1918 | error_t error; |
---|
| 1919 | vpn_t vpn; |
---|
| 1920 | uint32_t attr; |
---|
| 1921 | ppn_t ppn; |
---|
| 1922 | uint32_t offset; |
---|
| 1923 | |
---|
[23] | 1924 | vpn = (vpn_t)( (intptr_t)ptr >> CONFIG_PPM_PAGE_SHIFT ); |
---|
| 1925 | offset = (uint32_t)( ((intptr_t)ptr) & CONFIG_PPM_PAGE_MASK ); |
---|
[1] | 1926 | |
---|
[440] | 1927 | if( local_cxy == GET_CXY( process->ref_xp) ) // local process is reference process |
---|
[1] | 1928 | { |
---|
[407] | 1929 | error = vmm_get_pte( process, vpn , false , &attr , &ppn ); |
---|
[1] | 1930 | } |
---|
[50] | 1931 | else // calling process is not reference process |
---|
[1] | 1932 | { |
---|
| 1933 | cxy_t ref_cxy = GET_CXY( process->ref_xp ); |
---|
[433] | 1934 | process_t * ref_ptr = GET_PTR( process->ref_xp ); |
---|
[407] | 1935 | rpc_vmm_get_pte_client( ref_cxy , ref_ptr , vpn , false , &attr , &ppn , &error ); |
---|
[1] | 1936 | } |
---|
| 1937 | |
---|
[23] | 1938 | // set paddr |
---|
[1] | 1939 | *paddr = (((paddr_t)ppn) << CONFIG_PPM_PAGE_SHIFT) | offset; |
---|
[21] | 1940 | |
---|
[23] | 1941 | return error; |
---|
[313] | 1942 | |
---|
[315] | 1943 | } // end vmm_v2p_translate() |
---|
[1] | 1944 | |
---|
[440] | 1945 | */ |
---|