1 // SPDX-License-Identifier: GPL-2.0-only 2 /* arch/sparc64/kernel/traps.c 3 * 4 * Copyright (C) 1995,1997,2008,2009,2012 David S. Miller (davem@davemloft.net) 5 * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com) 6 */ 7 8 /* 9 * I like traps on v9, :)))) 10 */ 11 12 #include <linux/extable.h> 13 #include <linux/sched/mm.h> 14 #include <linux/sched/debug.h> 15 #include <linux/linkage.h> 16 #include <linux/kernel.h> 17 #include <linux/signal.h> 18 #include <linux/smp.h> 19 #include <linux/mm.h> 20 #include <linux/init.h> 21 #include <linux/kallsyms.h> 22 #include <linux/kdebug.h> 23 #include <linux/ftrace.h> 24 #include <linux/reboot.h> 25 #include <linux/gfp.h> 26 #include <linux/context_tracking.h> 27 28 #include <asm/smp.h> 29 #include <asm/delay.h> 30 #include <asm/ptrace.h> 31 #include <asm/oplib.h> 32 #include <asm/page.h> 33 #include <asm/unistd.h> 34 #include <linux/uaccess.h> 35 #include <asm/fpumacro.h> 36 #include <asm/lsu.h> 37 #include <asm/dcu.h> 38 #include <asm/estate.h> 39 #include <asm/chafsr.h> 40 #include <asm/sfafsr.h> 41 #include <asm/psrcompat.h> 42 #include <asm/processor.h> 43 #include <asm/timer.h> 44 #include <asm/head.h> 45 #include <asm/prom.h> 46 #include <asm/memctrl.h> 47 #include <asm/cacheflush.h> 48 #include <asm/setup.h> 49 50 #include "entry.h" 51 #include "kernel.h" 52 #include "kstack.h" 53 54 /* When an irrecoverable trap occurs at tl > 0, the trap entry 55 * code logs the trap state registers at every level in the trap 56 * stack. It is found at (pt_regs + sizeof(pt_regs)) and the layout 57 * is as follows: 58 */ 59 struct tl1_traplog { 60 struct { 61 unsigned long tstate; 62 unsigned long tpc; 63 unsigned long tnpc; 64 unsigned long tt; 65 } trapstack[4]; 66 unsigned long tl; 67 }; 68 dump_tl1_traplog(struct tl1_traplog * p)69 static void dump_tl1_traplog(struct tl1_traplog *p) 70 { 71 int i, limit; 72 73 printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, " 74 "dumping track stack.\n", p->tl); 75 76 limit = (tlb_type == hypervisor) ? 2 : 4; 77 for (i = 0; i < limit; i++) { 78 printk(KERN_EMERG 79 "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] " 80 "TNPC[%016lx] TT[%lx]\n", 81 i + 1, 82 p->trapstack[i].tstate, p->trapstack[i].tpc, 83 p->trapstack[i].tnpc, p->trapstack[i].tt); 84 printk("TRAPLOG: TPC<%pS>\n", (void *) p->trapstack[i].tpc); 85 } 86 } 87 bad_trap(struct pt_regs * regs,long lvl)88 void bad_trap(struct pt_regs *regs, long lvl) 89 { 90 char buffer[36]; 91 92 if (notify_die(DIE_TRAP, "bad trap", regs, 93 0, lvl, SIGTRAP) == NOTIFY_STOP) 94 return; 95 96 if (lvl < 0x100) { 97 sprintf(buffer, "Bad hw trap %lx at tl0\n", lvl); 98 die_if_kernel(buffer, regs); 99 } 100 101 lvl -= 0x100; 102 if (regs->tstate & TSTATE_PRIV) { 103 sprintf(buffer, "Kernel bad sw trap %lx", lvl); 104 die_if_kernel(buffer, regs); 105 } 106 if (test_thread_flag(TIF_32BIT)) { 107 regs->tpc &= 0xffffffff; 108 regs->tnpc &= 0xffffffff; 109 } 110 force_sig_fault_trapno(SIGILL, ILL_ILLTRP, 111 (void __user *)regs->tpc, lvl); 112 } 113 bad_trap_tl1(struct pt_regs * regs,long lvl)114 void bad_trap_tl1(struct pt_regs *regs, long lvl) 115 { 116 char buffer[36]; 117 118 if (notify_die(DIE_TRAP_TL1, "bad trap tl1", regs, 119 0, lvl, SIGTRAP) == NOTIFY_STOP) 120 return; 121 122 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 123 124 sprintf (buffer, "Bad trap %lx at tl>0", lvl); 125 die_if_kernel (buffer, regs); 126 } 127 128 #ifdef CONFIG_DEBUG_BUGVERBOSE do_BUG(const char * file,int line)129 void do_BUG(const char *file, int line) 130 { 131 bust_spinlocks(1); 132 printk("kernel BUG at %s:%d!\n", file, line); 133 } 134 EXPORT_SYMBOL(do_BUG); 135 #endif 136 137 static DEFINE_SPINLOCK(dimm_handler_lock); 138 static dimm_printer_t dimm_handler; 139 sprintf_dimm(int synd_code,unsigned long paddr,char * buf,int buflen)140 static int sprintf_dimm(int synd_code, unsigned long paddr, char *buf, int buflen) 141 { 142 unsigned long flags; 143 int ret = -ENODEV; 144 145 spin_lock_irqsave(&dimm_handler_lock, flags); 146 if (dimm_handler) { 147 ret = dimm_handler(synd_code, paddr, buf, buflen); 148 } else if (tlb_type == spitfire) { 149 if (prom_getunumber(synd_code, paddr, buf, buflen) == -1) 150 ret = -EINVAL; 151 else 152 ret = 0; 153 } else 154 ret = -ENODEV; 155 spin_unlock_irqrestore(&dimm_handler_lock, flags); 156 157 return ret; 158 } 159 register_dimm_printer(dimm_printer_t func)160 int register_dimm_printer(dimm_printer_t func) 161 { 162 unsigned long flags; 163 int ret = 0; 164 165 spin_lock_irqsave(&dimm_handler_lock, flags); 166 if (!dimm_handler) 167 dimm_handler = func; 168 else 169 ret = -EEXIST; 170 spin_unlock_irqrestore(&dimm_handler_lock, flags); 171 172 return ret; 173 } 174 EXPORT_SYMBOL_GPL(register_dimm_printer); 175 unregister_dimm_printer(dimm_printer_t func)176 void unregister_dimm_printer(dimm_printer_t func) 177 { 178 unsigned long flags; 179 180 spin_lock_irqsave(&dimm_handler_lock, flags); 181 if (dimm_handler == func) 182 dimm_handler = NULL; 183 spin_unlock_irqrestore(&dimm_handler_lock, flags); 184 } 185 EXPORT_SYMBOL_GPL(unregister_dimm_printer); 186 spitfire_insn_access_exception(struct pt_regs * regs,unsigned long sfsr,unsigned long sfar)187 void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) 188 { 189 enum ctx_state prev_state = exception_enter(); 190 191 if (notify_die(DIE_TRAP, "instruction access exception", regs, 192 0, 0x8, SIGTRAP) == NOTIFY_STOP) 193 goto out; 194 195 if (regs->tstate & TSTATE_PRIV) { 196 printk("spitfire_insn_access_exception: SFSR[%016lx] " 197 "SFAR[%016lx], going.\n", sfsr, sfar); 198 die_if_kernel("Iax", regs); 199 } 200 if (test_thread_flag(TIF_32BIT)) { 201 regs->tpc &= 0xffffffff; 202 regs->tnpc &= 0xffffffff; 203 } 204 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc); 205 out: 206 exception_exit(prev_state); 207 } 208 spitfire_insn_access_exception_tl1(struct pt_regs * regs,unsigned long sfsr,unsigned long sfar)209 void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) 210 { 211 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs, 212 0, 0x8, SIGTRAP) == NOTIFY_STOP) 213 return; 214 215 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 216 spitfire_insn_access_exception(regs, sfsr, sfar); 217 } 218 sun4v_insn_access_exception(struct pt_regs * regs,unsigned long addr,unsigned long type_ctx)219 void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) 220 { 221 unsigned short type = (type_ctx >> 16); 222 unsigned short ctx = (type_ctx & 0xffff); 223 224 if (notify_die(DIE_TRAP, "instruction access exception", regs, 225 0, 0x8, SIGTRAP) == NOTIFY_STOP) 226 return; 227 228 if (regs->tstate & TSTATE_PRIV) { 229 printk("sun4v_insn_access_exception: ADDR[%016lx] " 230 "CTX[%04x] TYPE[%04x], going.\n", 231 addr, ctx, type); 232 die_if_kernel("Iax", regs); 233 } 234 235 if (test_thread_flag(TIF_32BIT)) { 236 regs->tpc &= 0xffffffff; 237 regs->tnpc &= 0xffffffff; 238 } 239 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr); 240 } 241 sun4v_insn_access_exception_tl1(struct pt_regs * regs,unsigned long addr,unsigned long type_ctx)242 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) 243 { 244 if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs, 245 0, 0x8, SIGTRAP) == NOTIFY_STOP) 246 return; 247 248 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 249 sun4v_insn_access_exception(regs, addr, type_ctx); 250 } 251 is_no_fault_exception(struct pt_regs * regs)252 bool is_no_fault_exception(struct pt_regs *regs) 253 { 254 unsigned char asi; 255 u32 insn; 256 257 if (get_user(insn, (u32 __user *)regs->tpc) == -EFAULT) 258 return false; 259 260 /* 261 * Must do a little instruction decoding here in order to 262 * decide on a course of action. The bits of interest are: 263 * insn[31:30] = op, where 3 indicates the load/store group 264 * insn[24:19] = op3, which identifies individual opcodes 265 * insn[13] indicates an immediate offset 266 * op3[4]=1 identifies alternate space instructions 267 * op3[5:4]=3 identifies floating point instructions 268 * op3[2]=1 identifies stores 269 * See "Opcode Maps" in the appendix of any Sparc V9 270 * architecture spec for full details. 271 */ 272 if ((insn & 0xc0800000) == 0xc0800000) { /* op=3, op3[4]=1 */ 273 if (insn & 0x2000) /* immediate offset */ 274 asi = (regs->tstate >> 24); /* saved %asi */ 275 else 276 asi = (insn >> 5); /* immediate asi */ 277 if ((asi & 0xf6) == ASI_PNF) { 278 if (insn & 0x200000) /* op3[2], stores */ 279 return false; 280 if (insn & 0x1000000) /* op3[5:4]=3 (fp) */ 281 handle_ldf_stq(insn, regs); 282 else 283 handle_ld_nf(insn, regs); 284 return true; 285 } 286 } 287 return false; 288 } 289 spitfire_data_access_exception(struct pt_regs * regs,unsigned long sfsr,unsigned long sfar)290 void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) 291 { 292 enum ctx_state prev_state = exception_enter(); 293 294 if (notify_die(DIE_TRAP, "data access exception", regs, 295 0, 0x30, SIGTRAP) == NOTIFY_STOP) 296 goto out; 297 298 if (regs->tstate & TSTATE_PRIV) { 299 /* Test if this comes from uaccess places. */ 300 const struct exception_table_entry *entry; 301 302 entry = search_exception_tables(regs->tpc); 303 if (entry) { 304 /* Ouch, somebody is trying VM hole tricks on us... */ 305 #ifdef DEBUG_EXCEPTIONS 306 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc); 307 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n", 308 regs->tpc, entry->fixup); 309 #endif 310 regs->tpc = entry->fixup; 311 regs->tnpc = regs->tpc + 4; 312 goto out; 313 } 314 /* Shit... */ 315 printk("spitfire_data_access_exception: SFSR[%016lx] " 316 "SFAR[%016lx], going.\n", sfsr, sfar); 317 die_if_kernel("Dax", regs); 318 } 319 320 if (is_no_fault_exception(regs)) 321 return; 322 323 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar); 324 out: 325 exception_exit(prev_state); 326 } 327 spitfire_data_access_exception_tl1(struct pt_regs * regs,unsigned long sfsr,unsigned long sfar)328 void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) 329 { 330 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs, 331 0, 0x30, SIGTRAP) == NOTIFY_STOP) 332 return; 333 334 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 335 spitfire_data_access_exception(regs, sfsr, sfar); 336 } 337 sun4v_data_access_exception(struct pt_regs * regs,unsigned long addr,unsigned long type_ctx)338 void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) 339 { 340 unsigned short type = (type_ctx >> 16); 341 unsigned short ctx = (type_ctx & 0xffff); 342 343 if (notify_die(DIE_TRAP, "data access exception", regs, 344 0, 0x8, SIGTRAP) == NOTIFY_STOP) 345 return; 346 347 if (regs->tstate & TSTATE_PRIV) { 348 /* Test if this comes from uaccess places. */ 349 const struct exception_table_entry *entry; 350 351 entry = search_exception_tables(regs->tpc); 352 if (entry) { 353 /* Ouch, somebody is trying VM hole tricks on us... */ 354 #ifdef DEBUG_EXCEPTIONS 355 printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc); 356 printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n", 357 regs->tpc, entry->fixup); 358 #endif 359 regs->tpc = entry->fixup; 360 regs->tnpc = regs->tpc + 4; 361 return; 362 } 363 printk("sun4v_data_access_exception: ADDR[%016lx] " 364 "CTX[%04x] TYPE[%04x], going.\n", 365 addr, ctx, type); 366 die_if_kernel("Dax", regs); 367 } 368 369 if (test_thread_flag(TIF_32BIT)) { 370 regs->tpc &= 0xffffffff; 371 regs->tnpc &= 0xffffffff; 372 } 373 if (is_no_fault_exception(regs)) 374 return; 375 376 /* MCD (Memory Corruption Detection) disabled trap (TT=0x19) in HV 377 * is vectored thorugh data access exception trap with fault type 378 * set to HV_FAULT_TYPE_MCD_DIS. Check for MCD disabled trap. 379 * Accessing an address with invalid ASI for the address, for 380 * example setting an ADI tag on an address with ASI_MCD_PRIMARY 381 * when TTE.mcd is not set for the VA, is also vectored into 382 * kerbel by HV as data access exception with fault type set to 383 * HV_FAULT_TYPE_INV_ASI. 384 */ 385 switch (type) { 386 case HV_FAULT_TYPE_INV_ASI: 387 force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr); 388 break; 389 case HV_FAULT_TYPE_MCD_DIS: 390 force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr); 391 break; 392 default: 393 force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr); 394 break; 395 } 396 } 397 sun4v_data_access_exception_tl1(struct pt_regs * regs,unsigned long addr,unsigned long type_ctx)398 void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) 399 { 400 if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs, 401 0, 0x8, SIGTRAP) == NOTIFY_STOP) 402 return; 403 404 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 405 sun4v_data_access_exception(regs, addr, type_ctx); 406 } 407 408 #ifdef CONFIG_PCI 409 #include "pci_impl.h" 410 #endif 411 412 /* When access exceptions happen, we must do this. */ spitfire_clean_and_reenable_l1_caches(void)413 static void spitfire_clean_and_reenable_l1_caches(void) 414 { 415 unsigned long va; 416 417 if (tlb_type != spitfire) 418 BUG(); 419 420 /* Clean 'em. */ 421 for (va = 0; va < (PAGE_SIZE << 1); va += 32) { 422 spitfire_put_icache_tag(va, 0x0); 423 spitfire_put_dcache_tag(va, 0x0); 424 } 425 426 /* Re-enable in LSU. */ 427 __asm__ __volatile__("flush %%g6\n\t" 428 "membar #Sync\n\t" 429 "stxa %0, [%%g0] %1\n\t" 430 "membar #Sync" 431 : /* no outputs */ 432 : "r" (LSU_CONTROL_IC | LSU_CONTROL_DC | 433 LSU_CONTROL_IM | LSU_CONTROL_DM), 434 "i" (ASI_LSU_CONTROL) 435 : "memory"); 436 } 437 spitfire_enable_estate_errors(void)438 static void spitfire_enable_estate_errors(void) 439 { 440 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" 441 "membar #Sync" 442 : /* no outputs */ 443 : "r" (ESTATE_ERR_ALL), 444 "i" (ASI_ESTATE_ERROR_EN)); 445 } 446 447 static char ecc_syndrome_table[] = { 448 0x4c, 0x40, 0x41, 0x48, 0x42, 0x48, 0x48, 0x49, 449 0x43, 0x48, 0x48, 0x49, 0x48, 0x49, 0x49, 0x4a, 450 0x44, 0x48, 0x48, 0x20, 0x48, 0x39, 0x4b, 0x48, 451 0x48, 0x25, 0x31, 0x48, 0x28, 0x48, 0x48, 0x2c, 452 0x45, 0x48, 0x48, 0x21, 0x48, 0x3d, 0x04, 0x48, 453 0x48, 0x4b, 0x35, 0x48, 0x2d, 0x48, 0x48, 0x29, 454 0x48, 0x00, 0x01, 0x48, 0x0a, 0x48, 0x48, 0x4b, 455 0x0f, 0x48, 0x48, 0x4b, 0x48, 0x49, 0x49, 0x48, 456 0x46, 0x48, 0x48, 0x2a, 0x48, 0x3b, 0x27, 0x48, 457 0x48, 0x4b, 0x33, 0x48, 0x22, 0x48, 0x48, 0x2e, 458 0x48, 0x19, 0x1d, 0x48, 0x1b, 0x4a, 0x48, 0x4b, 459 0x1f, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48, 460 0x48, 0x4b, 0x24, 0x48, 0x07, 0x48, 0x48, 0x36, 461 0x4b, 0x48, 0x48, 0x3e, 0x48, 0x30, 0x38, 0x48, 462 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x16, 0x48, 463 0x48, 0x12, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b, 464 0x47, 0x48, 0x48, 0x2f, 0x48, 0x3f, 0x4b, 0x48, 465 0x48, 0x06, 0x37, 0x48, 0x23, 0x48, 0x48, 0x2b, 466 0x48, 0x05, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x32, 467 0x26, 0x48, 0x48, 0x3a, 0x48, 0x34, 0x3c, 0x48, 468 0x48, 0x11, 0x15, 0x48, 0x13, 0x4a, 0x48, 0x4b, 469 0x17, 0x48, 0x4a, 0x4b, 0x48, 0x4b, 0x4b, 0x48, 470 0x49, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x1e, 0x48, 471 0x48, 0x1a, 0x4b, 0x48, 0x49, 0x48, 0x48, 0x4b, 472 0x48, 0x08, 0x0d, 0x48, 0x02, 0x48, 0x48, 0x49, 473 0x03, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x4b, 0x48, 474 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x10, 0x48, 475 0x48, 0x14, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b, 476 0x49, 0x48, 0x48, 0x49, 0x48, 0x4b, 0x18, 0x48, 477 0x48, 0x1c, 0x4b, 0x48, 0x4b, 0x48, 0x48, 0x4b, 478 0x4a, 0x0c, 0x09, 0x48, 0x0e, 0x48, 0x48, 0x4b, 479 0x0b, 0x48, 0x48, 0x4b, 0x48, 0x4b, 0x4b, 0x4a 480 }; 481 482 static char *syndrome_unknown = "<Unknown>"; 483 spitfire_log_udb_syndrome(unsigned long afar,unsigned long udbh,unsigned long udbl,unsigned long bit)484 static void spitfire_log_udb_syndrome(unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long bit) 485 { 486 unsigned short scode; 487 char memmod_str[64], *p; 488 489 if (udbl & bit) { 490 scode = ecc_syndrome_table[udbl & 0xff]; 491 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0) 492 p = syndrome_unknown; 493 else 494 p = memmod_str; 495 printk(KERN_WARNING "CPU[%d]: UDBL Syndrome[%x] " 496 "Memory Module \"%s\"\n", 497 smp_processor_id(), scode, p); 498 } 499 500 if (udbh & bit) { 501 scode = ecc_syndrome_table[udbh & 0xff]; 502 if (sprintf_dimm(scode, afar, memmod_str, sizeof(memmod_str)) < 0) 503 p = syndrome_unknown; 504 else 505 p = memmod_str; 506 printk(KERN_WARNING "CPU[%d]: UDBH Syndrome[%x] " 507 "Memory Module \"%s\"\n", 508 smp_processor_id(), scode, p); 509 } 510 511 } 512 spitfire_cee_log(unsigned long afsr,unsigned long afar,unsigned long udbh,unsigned long udbl,int tl1,struct pt_regs * regs)513 static void spitfire_cee_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, int tl1, struct pt_regs *regs) 514 { 515 516 printk(KERN_WARNING "CPU[%d]: Correctable ECC Error " 517 "AFSR[%lx] AFAR[%016lx] UDBL[%lx] UDBH[%lx] TL>1[%d]\n", 518 smp_processor_id(), afsr, afar, udbl, udbh, tl1); 519 520 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_CE); 521 522 /* We always log it, even if someone is listening for this 523 * trap. 524 */ 525 notify_die(DIE_TRAP, "Correctable ECC Error", regs, 526 0, TRAP_TYPE_CEE, SIGTRAP); 527 528 /* The Correctable ECC Error trap does not disable I/D caches. So 529 * we only have to restore the ESTATE Error Enable register. 530 */ 531 spitfire_enable_estate_errors(); 532 } 533 spitfire_ue_log(unsigned long afsr,unsigned long afar,unsigned long udbh,unsigned long udbl,unsigned long tt,int tl1,struct pt_regs * regs)534 static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned long udbh, unsigned long udbl, unsigned long tt, int tl1, struct pt_regs *regs) 535 { 536 printk(KERN_WARNING "CPU[%d]: Uncorrectable Error AFSR[%lx] " 537 "AFAR[%lx] UDBL[%lx] UDBH[%ld] TT[%lx] TL>1[%d]\n", 538 smp_processor_id(), afsr, afar, udbl, udbh, tt, tl1); 539 540 /* XXX add more human friendly logging of the error status 541 * XXX as is implemented for cheetah 542 */ 543 544 spitfire_log_udb_syndrome(afar, udbh, udbl, UDBE_UE); 545 546 /* We always log it, even if someone is listening for this 547 * trap. 548 */ 549 notify_die(DIE_TRAP, "Uncorrectable Error", regs, 550 0, tt, SIGTRAP); 551 552 if (regs->tstate & TSTATE_PRIV) { 553 if (tl1) 554 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 555 die_if_kernel("UE", regs); 556 } 557 558 /* XXX need more intelligent processing here, such as is implemented 559 * XXX for cheetah errors, in fact if the E-cache still holds the 560 * XXX line with bad parity this will loop 561 */ 562 563 spitfire_clean_and_reenable_l1_caches(); 564 spitfire_enable_estate_errors(); 565 566 if (test_thread_flag(TIF_32BIT)) { 567 regs->tpc &= 0xffffffff; 568 regs->tnpc &= 0xffffffff; 569 } 570 force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0); 571 } 572 spitfire_access_error(struct pt_regs * regs,unsigned long status_encoded,unsigned long afar)573 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar) 574 { 575 unsigned long afsr, tt, udbh, udbl; 576 int tl1; 577 578 afsr = (status_encoded & SFSTAT_AFSR_MASK) >> SFSTAT_AFSR_SHIFT; 579 tt = (status_encoded & SFSTAT_TRAP_TYPE) >> SFSTAT_TRAP_TYPE_SHIFT; 580 tl1 = (status_encoded & SFSTAT_TL_GT_ONE) ? 1 : 0; 581 udbl = (status_encoded & SFSTAT_UDBL_MASK) >> SFSTAT_UDBL_SHIFT; 582 udbh = (status_encoded & SFSTAT_UDBH_MASK) >> SFSTAT_UDBH_SHIFT; 583 584 #ifdef CONFIG_PCI 585 if (tt == TRAP_TYPE_DAE && 586 pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) { 587 spitfire_clean_and_reenable_l1_caches(); 588 spitfire_enable_estate_errors(); 589 590 pci_poke_faulted = 1; 591 regs->tnpc = regs->tpc + 4; 592 return; 593 } 594 #endif 595 596 if (afsr & SFAFSR_UE) 597 spitfire_ue_log(afsr, afar, udbh, udbl, tt, tl1, regs); 598 599 if (tt == TRAP_TYPE_CEE) { 600 /* Handle the case where we took a CEE trap, but ACK'd 601 * only the UE state in the UDB error registers. 602 */ 603 if (afsr & SFAFSR_UE) { 604 if (udbh & UDBE_CE) { 605 __asm__ __volatile__( 606 "stxa %0, [%1] %2\n\t" 607 "membar #Sync" 608 : /* no outputs */ 609 : "r" (udbh & UDBE_CE), 610 "r" (0x0), "i" (ASI_UDB_ERROR_W)); 611 } 612 if (udbl & UDBE_CE) { 613 __asm__ __volatile__( 614 "stxa %0, [%1] %2\n\t" 615 "membar #Sync" 616 : /* no outputs */ 617 : "r" (udbl & UDBE_CE), 618 "r" (0x18), "i" (ASI_UDB_ERROR_W)); 619 } 620 } 621 622 spitfire_cee_log(afsr, afar, udbh, udbl, tl1, regs); 623 } 624 } 625 626 int cheetah_pcache_forced_on; 627 cheetah_enable_pcache(void)628 void cheetah_enable_pcache(void) 629 { 630 unsigned long dcr; 631 632 printk("CHEETAH: Enabling P-Cache on cpu %d.\n", 633 smp_processor_id()); 634 635 __asm__ __volatile__("ldxa [%%g0] %1, %0" 636 : "=r" (dcr) 637 : "i" (ASI_DCU_CONTROL_REG)); 638 dcr |= (DCU_PE | DCU_HPE | DCU_SPE | DCU_SL); 639 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" 640 "membar #Sync" 641 : /* no outputs */ 642 : "r" (dcr), "i" (ASI_DCU_CONTROL_REG)); 643 } 644 645 /* Cheetah error trap handling. */ 646 static unsigned long ecache_flush_physbase; 647 static unsigned long ecache_flush_linesize; 648 static unsigned long ecache_flush_size; 649 650 /* This table is ordered in priority of errors and matches the 651 * AFAR overwrite policy as well. 652 */ 653 654 struct afsr_error_table { 655 unsigned long mask; 656 const char *name; 657 }; 658 659 static const char CHAFSR_PERR_msg[] = 660 "System interface protocol error"; 661 static const char CHAFSR_IERR_msg[] = 662 "Internal processor error"; 663 static const char CHAFSR_ISAP_msg[] = 664 "System request parity error on incoming address"; 665 static const char CHAFSR_UCU_msg[] = 666 "Uncorrectable E-cache ECC error for ifetch/data"; 667 static const char CHAFSR_UCC_msg[] = 668 "SW Correctable E-cache ECC error for ifetch/data"; 669 static const char CHAFSR_UE_msg[] = 670 "Uncorrectable system bus data ECC error for read"; 671 static const char CHAFSR_EDU_msg[] = 672 "Uncorrectable E-cache ECC error for stmerge/blkld"; 673 static const char CHAFSR_EMU_msg[] = 674 "Uncorrectable system bus MTAG error"; 675 static const char CHAFSR_WDU_msg[] = 676 "Uncorrectable E-cache ECC error for writeback"; 677 static const char CHAFSR_CPU_msg[] = 678 "Uncorrectable ECC error for copyout"; 679 static const char CHAFSR_CE_msg[] = 680 "HW corrected system bus data ECC error for read"; 681 static const char CHAFSR_EDC_msg[] = 682 "HW corrected E-cache ECC error for stmerge/blkld"; 683 static const char CHAFSR_EMC_msg[] = 684 "HW corrected system bus MTAG ECC error"; 685 static const char CHAFSR_WDC_msg[] = 686 "HW corrected E-cache ECC error for writeback"; 687 static const char CHAFSR_CPC_msg[] = 688 "HW corrected ECC error for copyout"; 689 static const char CHAFSR_TO_msg[] = 690 "Unmapped error from system bus"; 691 static const char CHAFSR_BERR_msg[] = 692 "Bus error response from system bus"; 693 static const char CHAFSR_IVC_msg[] = 694 "HW corrected system bus data ECC error for ivec read"; 695 static const char CHAFSR_IVU_msg[] = 696 "Uncorrectable system bus data ECC error for ivec read"; 697 static struct afsr_error_table __cheetah_error_table[] = { 698 { CHAFSR_PERR, CHAFSR_PERR_msg }, 699 { CHAFSR_IERR, CHAFSR_IERR_msg }, 700 { CHAFSR_ISAP, CHAFSR_ISAP_msg }, 701 { CHAFSR_UCU, CHAFSR_UCU_msg }, 702 { CHAFSR_UCC, CHAFSR_UCC_msg }, 703 { CHAFSR_UE, CHAFSR_UE_msg }, 704 { CHAFSR_EDU, CHAFSR_EDU_msg }, 705 { CHAFSR_EMU, CHAFSR_EMU_msg }, 706 { CHAFSR_WDU, CHAFSR_WDU_msg }, 707 { CHAFSR_CPU, CHAFSR_CPU_msg }, 708 { CHAFSR_CE, CHAFSR_CE_msg }, 709 { CHAFSR_EDC, CHAFSR_EDC_msg }, 710 { CHAFSR_EMC, CHAFSR_EMC_msg }, 711 { CHAFSR_WDC, CHAFSR_WDC_msg }, 712 { CHAFSR_CPC, CHAFSR_CPC_msg }, 713 { CHAFSR_TO, CHAFSR_TO_msg }, 714 { CHAFSR_BERR, CHAFSR_BERR_msg }, 715 /* These two do not update the AFAR. */ 716 { CHAFSR_IVC, CHAFSR_IVC_msg }, 717 { CHAFSR_IVU, CHAFSR_IVU_msg }, 718 { 0, NULL }, 719 }; 720 static const char CHPAFSR_DTO_msg[] = 721 "System bus unmapped error for prefetch/storequeue-read"; 722 static const char CHPAFSR_DBERR_msg[] = 723 "System bus error for prefetch/storequeue-read"; 724 static const char CHPAFSR_THCE_msg[] = 725 "Hardware corrected E-cache Tag ECC error"; 726 static const char CHPAFSR_TSCE_msg[] = 727 "SW handled correctable E-cache Tag ECC error"; 728 static const char CHPAFSR_TUE_msg[] = 729 "Uncorrectable E-cache Tag ECC error"; 730 static const char CHPAFSR_DUE_msg[] = 731 "System bus uncorrectable data ECC error due to prefetch/store-fill"; 732 static struct afsr_error_table __cheetah_plus_error_table[] = { 733 { CHAFSR_PERR, CHAFSR_PERR_msg }, 734 { CHAFSR_IERR, CHAFSR_IERR_msg }, 735 { CHAFSR_ISAP, CHAFSR_ISAP_msg }, 736 { CHAFSR_UCU, CHAFSR_UCU_msg }, 737 { CHAFSR_UCC, CHAFSR_UCC_msg }, 738 { CHAFSR_UE, CHAFSR_UE_msg }, 739 { CHAFSR_EDU, CHAFSR_EDU_msg }, 740 { CHAFSR_EMU, CHAFSR_EMU_msg }, 741 { CHAFSR_WDU, CHAFSR_WDU_msg }, 742 { CHAFSR_CPU, CHAFSR_CPU_msg }, 743 { CHAFSR_CE, CHAFSR_CE_msg }, 744 { CHAFSR_EDC, CHAFSR_EDC_msg }, 745 { CHAFSR_EMC, CHAFSR_EMC_msg }, 746 { CHAFSR_WDC, CHAFSR_WDC_msg }, 747 { CHAFSR_CPC, CHAFSR_CPC_msg }, 748 { CHAFSR_TO, CHAFSR_TO_msg }, 749 { CHAFSR_BERR, CHAFSR_BERR_msg }, 750 { CHPAFSR_DTO, CHPAFSR_DTO_msg }, 751 { CHPAFSR_DBERR, CHPAFSR_DBERR_msg }, 752 { CHPAFSR_THCE, CHPAFSR_THCE_msg }, 753 { CHPAFSR_TSCE, CHPAFSR_TSCE_msg }, 754 { CHPAFSR_TUE, CHPAFSR_TUE_msg }, 755 { CHPAFSR_DUE, CHPAFSR_DUE_msg }, 756 /* These two do not update the AFAR. */ 757 { CHAFSR_IVC, CHAFSR_IVC_msg }, 758 { CHAFSR_IVU, CHAFSR_IVU_msg }, 759 { 0, NULL }, 760 }; 761 static const char JPAFSR_JETO_msg[] = 762 "System interface protocol error, hw timeout caused"; 763 static const char JPAFSR_SCE_msg[] = 764 "Parity error on system snoop results"; 765 static const char JPAFSR_JEIC_msg[] = 766 "System interface protocol error, illegal command detected"; 767 static const char JPAFSR_JEIT_msg[] = 768 "System interface protocol error, illegal ADTYPE detected"; 769 static const char JPAFSR_OM_msg[] = 770 "Out of range memory error has occurred"; 771 static const char JPAFSR_ETP_msg[] = 772 "Parity error on L2 cache tag SRAM"; 773 static const char JPAFSR_UMS_msg[] = 774 "Error due to unsupported store"; 775 static const char JPAFSR_RUE_msg[] = 776 "Uncorrectable ECC error from remote cache/memory"; 777 static const char JPAFSR_RCE_msg[] = 778 "Correctable ECC error from remote cache/memory"; 779 static const char JPAFSR_BP_msg[] = 780 "JBUS parity error on returned read data"; 781 static const char JPAFSR_WBP_msg[] = 782 "JBUS parity error on data for writeback or block store"; 783 static const char JPAFSR_FRC_msg[] = 784 "Foreign read to DRAM incurring correctable ECC error"; 785 static const char JPAFSR_FRU_msg[] = 786 "Foreign read to DRAM incurring uncorrectable ECC error"; 787 static struct afsr_error_table __jalapeno_error_table[] = { 788 { JPAFSR_JETO, JPAFSR_JETO_msg }, 789 { JPAFSR_SCE, JPAFSR_SCE_msg }, 790 { JPAFSR_JEIC, JPAFSR_JEIC_msg }, 791 { JPAFSR_JEIT, JPAFSR_JEIT_msg }, 792 { CHAFSR_PERR, CHAFSR_PERR_msg }, 793 { CHAFSR_IERR, CHAFSR_IERR_msg }, 794 { CHAFSR_ISAP, CHAFSR_ISAP_msg }, 795 { CHAFSR_UCU, CHAFSR_UCU_msg }, 796 { CHAFSR_UCC, CHAFSR_UCC_msg }, 797 { CHAFSR_UE, CHAFSR_UE_msg }, 798 { CHAFSR_EDU, CHAFSR_EDU_msg }, 799 { JPAFSR_OM, JPAFSR_OM_msg }, 800 { CHAFSR_WDU, CHAFSR_WDU_msg }, 801 { CHAFSR_CPU, CHAFSR_CPU_msg }, 802 { CHAFSR_CE, CHAFSR_CE_msg }, 803 { CHAFSR_EDC, CHAFSR_EDC_msg }, 804 { JPAFSR_ETP, JPAFSR_ETP_msg }, 805 { CHAFSR_WDC, CHAFSR_WDC_msg }, 806 { CHAFSR_CPC, CHAFSR_CPC_msg }, 807 { CHAFSR_TO, CHAFSR_TO_msg }, 808 { CHAFSR_BERR, CHAFSR_BERR_msg }, 809 { JPAFSR_UMS, JPAFSR_UMS_msg }, 810 { JPAFSR_RUE, JPAFSR_RUE_msg }, 811 { JPAFSR_RCE, JPAFSR_RCE_msg }, 812 { JPAFSR_BP, JPAFSR_BP_msg }, 813 { JPAFSR_WBP, JPAFSR_WBP_msg }, 814 { JPAFSR_FRC, JPAFSR_FRC_msg }, 815 { JPAFSR_FRU, JPAFSR_FRU_msg }, 816 /* These two do not update the AFAR. */ 817 { CHAFSR_IVU, CHAFSR_IVU_msg }, 818 { 0, NULL }, 819 }; 820 static struct afsr_error_table *cheetah_error_table; 821 static unsigned long cheetah_afsr_errors; 822 823 struct cheetah_err_info *cheetah_error_log; 824 cheetah_get_error_log(unsigned long afsr)825 static inline struct cheetah_err_info *cheetah_get_error_log(unsigned long afsr) 826 { 827 struct cheetah_err_info *p; 828 int cpu = smp_processor_id(); 829 830 if (!cheetah_error_log) 831 return NULL; 832 833 p = cheetah_error_log + (cpu * 2); 834 if ((afsr & CHAFSR_TL1) != 0UL) 835 p++; 836 837 return p; 838 } 839 840 extern unsigned int tl0_icpe[], tl1_icpe[]; 841 extern unsigned int tl0_dcpe[], tl1_dcpe[]; 842 extern unsigned int tl0_fecc[], tl1_fecc[]; 843 extern unsigned int tl0_cee[], tl1_cee[]; 844 extern unsigned int tl0_iae[], tl1_iae[]; 845 extern unsigned int tl0_dae[], tl1_dae[]; 846 extern unsigned int cheetah_plus_icpe_trap_vector[], cheetah_plus_icpe_trap_vector_tl1[]; 847 extern unsigned int cheetah_plus_dcpe_trap_vector[], cheetah_plus_dcpe_trap_vector_tl1[]; 848 extern unsigned int cheetah_fecc_trap_vector[], cheetah_fecc_trap_vector_tl1[]; 849 extern unsigned int cheetah_cee_trap_vector[], cheetah_cee_trap_vector_tl1[]; 850 extern unsigned int cheetah_deferred_trap_vector[], cheetah_deferred_trap_vector_tl1[]; 851 cheetah_ecache_flush_init(void)852 void __init cheetah_ecache_flush_init(void) 853 { 854 unsigned long largest_size, smallest_linesize, order, ver; 855 int i, sz; 856 857 /* Scan all cpu device tree nodes, note two values: 858 * 1) largest E-cache size 859 * 2) smallest E-cache line size 860 */ 861 largest_size = 0UL; 862 smallest_linesize = ~0UL; 863 864 for (i = 0; i < NR_CPUS; i++) { 865 unsigned long val; 866 867 val = cpu_data(i).ecache_size; 868 if (!val) 869 continue; 870 871 if (val > largest_size) 872 largest_size = val; 873 874 val = cpu_data(i).ecache_line_size; 875 if (val < smallest_linesize) 876 smallest_linesize = val; 877 878 } 879 880 if (largest_size == 0UL || smallest_linesize == ~0UL) { 881 prom_printf("cheetah_ecache_flush_init: Cannot probe cpu E-cache " 882 "parameters.\n"); 883 prom_halt(); 884 } 885 886 ecache_flush_size = (2 * largest_size); 887 ecache_flush_linesize = smallest_linesize; 888 889 ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size); 890 891 if (ecache_flush_physbase == ~0UL) { 892 prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte " 893 "contiguous physical memory.\n", 894 ecache_flush_size); 895 prom_halt(); 896 } 897 898 /* Now allocate error trap reporting scoreboard. */ 899 sz = NR_CPUS * (2 * sizeof(struct cheetah_err_info)); 900 for (order = 0; order < NR_PAGE_ORDERS; order++) { 901 if ((PAGE_SIZE << order) >= sz) 902 break; 903 } 904 cheetah_error_log = (struct cheetah_err_info *) 905 __get_free_pages(GFP_KERNEL, order); 906 if (!cheetah_error_log) { 907 prom_printf("cheetah_ecache_flush_init: Failed to allocate " 908 "error logging scoreboard (%d bytes).\n", sz); 909 prom_halt(); 910 } 911 memset(cheetah_error_log, 0, PAGE_SIZE << order); 912 913 /* Mark all AFSRs as invalid so that the trap handler will 914 * log new new information there. 915 */ 916 for (i = 0; i < 2 * NR_CPUS; i++) 917 cheetah_error_log[i].afsr = CHAFSR_INVALID; 918 919 __asm__ ("rdpr %%ver, %0" : "=r" (ver)); 920 if ((ver >> 32) == __JALAPENO_ID || 921 (ver >> 32) == __SERRANO_ID) { 922 cheetah_error_table = &__jalapeno_error_table[0]; 923 cheetah_afsr_errors = JPAFSR_ERRORS; 924 } else if ((ver >> 32) == 0x003e0015) { 925 cheetah_error_table = &__cheetah_plus_error_table[0]; 926 cheetah_afsr_errors = CHPAFSR_ERRORS; 927 } else { 928 cheetah_error_table = &__cheetah_error_table[0]; 929 cheetah_afsr_errors = CHAFSR_ERRORS; 930 } 931 932 /* Now patch trap tables. */ 933 memcpy(tl0_fecc, cheetah_fecc_trap_vector, (8 * 4)); 934 memcpy(tl1_fecc, cheetah_fecc_trap_vector_tl1, (8 * 4)); 935 memcpy(tl0_cee, cheetah_cee_trap_vector, (8 * 4)); 936 memcpy(tl1_cee, cheetah_cee_trap_vector_tl1, (8 * 4)); 937 memcpy(tl0_iae, cheetah_deferred_trap_vector, (8 * 4)); 938 memcpy(tl1_iae, cheetah_deferred_trap_vector_tl1, (8 * 4)); 939 memcpy(tl0_dae, cheetah_deferred_trap_vector, (8 * 4)); 940 memcpy(tl1_dae, cheetah_deferred_trap_vector_tl1, (8 * 4)); 941 if (tlb_type == cheetah_plus) { 942 memcpy(tl0_dcpe, cheetah_plus_dcpe_trap_vector, (8 * 4)); 943 memcpy(tl1_dcpe, cheetah_plus_dcpe_trap_vector_tl1, (8 * 4)); 944 memcpy(tl0_icpe, cheetah_plus_icpe_trap_vector, (8 * 4)); 945 memcpy(tl1_icpe, cheetah_plus_icpe_trap_vector_tl1, (8 * 4)); 946 } 947 flushi(PAGE_OFFSET); 948 } 949 cheetah_flush_ecache(void)950 static void cheetah_flush_ecache(void) 951 { 952 unsigned long flush_base = ecache_flush_physbase; 953 unsigned long flush_linesize = ecache_flush_linesize; 954 unsigned long flush_size = ecache_flush_size; 955 956 __asm__ __volatile__("1: subcc %0, %4, %0\n\t" 957 " bne,pt %%xcc, 1b\n\t" 958 " ldxa [%2 + %0] %3, %%g0\n\t" 959 : "=&r" (flush_size) 960 : "0" (flush_size), "r" (flush_base), 961 "i" (ASI_PHYS_USE_EC), "r" (flush_linesize)); 962 } 963 cheetah_flush_ecache_line(unsigned long physaddr)964 static void cheetah_flush_ecache_line(unsigned long physaddr) 965 { 966 unsigned long alias; 967 968 physaddr &= ~(8UL - 1UL); 969 physaddr = (ecache_flush_physbase + 970 (physaddr & ((ecache_flush_size>>1UL) - 1UL))); 971 alias = physaddr + (ecache_flush_size >> 1UL); 972 __asm__ __volatile__("ldxa [%0] %2, %%g0\n\t" 973 "ldxa [%1] %2, %%g0\n\t" 974 "membar #Sync" 975 : /* no outputs */ 976 : "r" (physaddr), "r" (alias), 977 "i" (ASI_PHYS_USE_EC)); 978 } 979 980 /* Unfortunately, the diagnostic access to the I-cache tags we need to 981 * use to clear the thing interferes with I-cache coherency transactions. 982 * 983 * So we must only flush the I-cache when it is disabled. 984 */ __cheetah_flush_icache(void)985 static void __cheetah_flush_icache(void) 986 { 987 unsigned int icache_size, icache_line_size; 988 unsigned long addr; 989 990 icache_size = local_cpu_data().icache_size; 991 icache_line_size = local_cpu_data().icache_line_size; 992 993 /* Clear the valid bits in all the tags. */ 994 for (addr = 0; addr < icache_size; addr += icache_line_size) { 995 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" 996 "membar #Sync" 997 : /* no outputs */ 998 : "r" (addr | (2 << 3)), 999 "i" (ASI_IC_TAG)); 1000 } 1001 } 1002 cheetah_flush_icache(void)1003 static void cheetah_flush_icache(void) 1004 { 1005 unsigned long dcu_save; 1006 1007 /* Save current DCU, disable I-cache. */ 1008 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t" 1009 "or %0, %2, %%g1\n\t" 1010 "stxa %%g1, [%%g0] %1\n\t" 1011 "membar #Sync" 1012 : "=r" (dcu_save) 1013 : "i" (ASI_DCU_CONTROL_REG), "i" (DCU_IC) 1014 : "g1"); 1015 1016 __cheetah_flush_icache(); 1017 1018 /* Restore DCU register */ 1019 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" 1020 "membar #Sync" 1021 : /* no outputs */ 1022 : "r" (dcu_save), "i" (ASI_DCU_CONTROL_REG)); 1023 } 1024 cheetah_flush_dcache(void)1025 static void cheetah_flush_dcache(void) 1026 { 1027 unsigned int dcache_size, dcache_line_size; 1028 unsigned long addr; 1029 1030 dcache_size = local_cpu_data().dcache_size; 1031 dcache_line_size = local_cpu_data().dcache_line_size; 1032 1033 for (addr = 0; addr < dcache_size; addr += dcache_line_size) { 1034 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" 1035 "membar #Sync" 1036 : /* no outputs */ 1037 : "r" (addr), "i" (ASI_DCACHE_TAG)); 1038 } 1039 } 1040 1041 /* In order to make the even parity correct we must do two things. 1042 * First, we clear DC_data_parity and set DC_utag to an appropriate value. 1043 * Next, we clear out all 32-bytes of data for that line. Data of 1044 * all-zero + tag parity value of zero == correct parity. 1045 */ cheetah_plus_zap_dcache_parity(void)1046 static void cheetah_plus_zap_dcache_parity(void) 1047 { 1048 unsigned int dcache_size, dcache_line_size; 1049 unsigned long addr; 1050 1051 dcache_size = local_cpu_data().dcache_size; 1052 dcache_line_size = local_cpu_data().dcache_line_size; 1053 1054 for (addr = 0; addr < dcache_size; addr += dcache_line_size) { 1055 unsigned long tag = (addr >> 14); 1056 unsigned long line; 1057 1058 __asm__ __volatile__("membar #Sync\n\t" 1059 "stxa %0, [%1] %2\n\t" 1060 "membar #Sync" 1061 : /* no outputs */ 1062 : "r" (tag), "r" (addr), 1063 "i" (ASI_DCACHE_UTAG)); 1064 for (line = addr; line < addr + dcache_line_size; line += 8) 1065 __asm__ __volatile__("membar #Sync\n\t" 1066 "stxa %%g0, [%0] %1\n\t" 1067 "membar #Sync" 1068 : /* no outputs */ 1069 : "r" (line), 1070 "i" (ASI_DCACHE_DATA)); 1071 } 1072 } 1073 1074 /* Conversion tables used to frob Cheetah AFSR syndrome values into 1075 * something palatable to the memory controller driver get_unumber 1076 * routine. 1077 */ 1078 #define MT0 137 1079 #define MT1 138 1080 #define MT2 139 1081 #define NONE 254 1082 #define MTC0 140 1083 #define MTC1 141 1084 #define MTC2 142 1085 #define MTC3 143 1086 #define C0 128 1087 #define C1 129 1088 #define C2 130 1089 #define C3 131 1090 #define C4 132 1091 #define C5 133 1092 #define C6 134 1093 #define C7 135 1094 #define C8 136 1095 #define M2 144 1096 #define M3 145 1097 #define M4 146 1098 #define M 147 1099 static unsigned char cheetah_ecc_syntab[] = { 1100 /*00*/NONE, C0, C1, M2, C2, M2, M3, 47, C3, M2, M2, 53, M2, 41, 29, M, 1101 /*01*/C4, M, M, 50, M2, 38, 25, M2, M2, 33, 24, M2, 11, M, M2, 16, 1102 /*02*/C5, M, M, 46, M2, 37, 19, M2, M, 31, 32, M, 7, M2, M2, 10, 1103 /*03*/M2, 40, 13, M2, 59, M, M2, 66, M, M2, M2, 0, M2, 67, 71, M, 1104 /*04*/C6, M, M, 43, M, 36, 18, M, M2, 49, 15, M, 63, M2, M2, 6, 1105 /*05*/M2, 44, 28, M2, M, M2, M2, 52, 68, M2, M2, 62, M2, M3, M3, M4, 1106 /*06*/M2, 26, 106, M2, 64, M, M2, 2, 120, M, M2, M3, M, M3, M3, M4, 1107 /*07*/116, M2, M2, M3, M2, M3, M, M4, M2, 58, 54, M2, M, M4, M4, M3, 1108 /*08*/C7, M2, M, 42, M, 35, 17, M2, M, 45, 14, M2, 21, M2, M2, 5, 1109 /*09*/M, 27, M, M, 99, M, M, 3, 114, M2, M2, 20, M2, M3, M3, M, 1110 /*0a*/M2, 23, 113, M2, 112, M2, M, 51, 95, M, M2, M3, M2, M3, M3, M2, 1111 /*0b*/103, M, M2, M3, M2, M3, M3, M4, M2, 48, M, M, 73, M2, M, M3, 1112 /*0c*/M2, 22, 110, M2, 109, M2, M, 9, 108, M2, M, M3, M2, M3, M3, M, 1113 /*0d*/102, M2, M, M, M2, M3, M3, M, M2, M3, M3, M2, M, M4, M, M3, 1114 /*0e*/98, M, M2, M3, M2, M, M3, M4, M2, M3, M3, M4, M3, M, M, M, 1115 /*0f*/M2, M3, M3, M, M3, M, M, M, 56, M4, M, M3, M4, M, M, M, 1116 /*10*/C8, M, M2, 39, M, 34, 105, M2, M, 30, 104, M, 101, M, M, 4, 1117 /*11*/M, M, 100, M, 83, M, M2, 12, 87, M, M, 57, M2, M, M3, M, 1118 /*12*/M2, 97, 82, M2, 78, M2, M2, 1, 96, M, M, M, M, M, M3, M2, 1119 /*13*/94, M, M2, M3, M2, M, M3, M, M2, M, 79, M, 69, M, M4, M, 1120 /*14*/M2, 93, 92, M, 91, M, M2, 8, 90, M2, M2, M, M, M, M, M4, 1121 /*15*/89, M, M, M3, M2, M3, M3, M, M, M, M3, M2, M3, M2, M, M3, 1122 /*16*/86, M, M2, M3, M2, M, M3, M, M2, M, M3, M, M3, M, M, M3, 1123 /*17*/M, M, M3, M2, M3, M2, M4, M, 60, M, M2, M3, M4, M, M, M2, 1124 /*18*/M2, 88, 85, M2, 84, M, M2, 55, 81, M2, M2, M3, M2, M3, M3, M4, 1125 /*19*/77, M, M, M, M2, M3, M, M, M2, M3, M3, M4, M3, M2, M, M, 1126 /*1a*/74, M, M2, M3, M, M, M3, M, M, M, M3, M, M3, M, M4, M3, 1127 /*1b*/M2, 70, 107, M4, 65, M2, M2, M, 127, M, M, M, M2, M3, M3, M, 1128 /*1c*/80, M2, M2, 72, M, 119, 118, M, M2, 126, 76, M, 125, M, M4, M3, 1129 /*1d*/M2, 115, 124, M, 75, M, M, M3, 61, M, M4, M, M4, M, M, M, 1130 /*1e*/M, 123, 122, M4, 121, M4, M, M3, 117, M2, M2, M3, M4, M3, M, M, 1131 /*1f*/111, M, M, M, M4, M3, M3, M, M, M, M3, M, M3, M2, M, M 1132 }; 1133 static unsigned char cheetah_mtag_syntab[] = { 1134 NONE, MTC0, 1135 MTC1, NONE, 1136 MTC2, NONE, 1137 NONE, MT0, 1138 MTC3, NONE, 1139 NONE, MT1, 1140 NONE, MT2, 1141 NONE, NONE 1142 }; 1143 1144 /* Return the highest priority error conditon mentioned. */ cheetah_get_hipri(unsigned long afsr)1145 static inline unsigned long cheetah_get_hipri(unsigned long afsr) 1146 { 1147 unsigned long tmp = 0; 1148 int i; 1149 1150 for (i = 0; cheetah_error_table[i].mask; i++) { 1151 if ((tmp = (afsr & cheetah_error_table[i].mask)) != 0UL) 1152 return tmp; 1153 } 1154 return tmp; 1155 } 1156 cheetah_get_string(unsigned long bit)1157 static const char *cheetah_get_string(unsigned long bit) 1158 { 1159 int i; 1160 1161 for (i = 0; cheetah_error_table[i].mask; i++) { 1162 if ((bit & cheetah_error_table[i].mask) != 0UL) 1163 return cheetah_error_table[i].name; 1164 } 1165 return "???"; 1166 } 1167 cheetah_log_errors(struct pt_regs * regs,struct cheetah_err_info * info,unsigned long afsr,unsigned long afar,int recoverable)1168 static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *info, 1169 unsigned long afsr, unsigned long afar, int recoverable) 1170 { 1171 unsigned long hipri; 1172 char unum[256]; 1173 1174 printk("%s" "ERROR(%d): Cheetah error trap taken afsr[%016lx] afar[%016lx] TL1(%d)\n", 1175 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1176 afsr, afar, 1177 (afsr & CHAFSR_TL1) ? 1 : 0); 1178 printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n", 1179 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1180 regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate); 1181 printk("%s" "ERROR(%d): ", 1182 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id()); 1183 printk("TPC<%pS>\n", (void *) regs->tpc); 1184 printk("%s" "ERROR(%d): M_SYND(%lx), E_SYND(%lx)%s%s\n", 1185 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1186 (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT, 1187 (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT, 1188 (afsr & CHAFSR_ME) ? ", Multiple Errors" : "", 1189 (afsr & CHAFSR_PRIV) ? ", Privileged" : ""); 1190 hipri = cheetah_get_hipri(afsr); 1191 printk("%s" "ERROR(%d): Highest priority error (%016lx) \"%s\"\n", 1192 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1193 hipri, cheetah_get_string(hipri)); 1194 1195 /* Try to get unumber if relevant. */ 1196 #define ESYND_ERRORS (CHAFSR_IVC | CHAFSR_IVU | \ 1197 CHAFSR_CPC | CHAFSR_CPU | \ 1198 CHAFSR_UE | CHAFSR_CE | \ 1199 CHAFSR_EDC | CHAFSR_EDU | \ 1200 CHAFSR_UCC | CHAFSR_UCU | \ 1201 CHAFSR_WDU | CHAFSR_WDC) 1202 #define MSYND_ERRORS (CHAFSR_EMC | CHAFSR_EMU) 1203 if (afsr & ESYND_ERRORS) { 1204 int syndrome; 1205 int ret; 1206 1207 syndrome = (afsr & CHAFSR_E_SYNDROME) >> CHAFSR_E_SYNDROME_SHIFT; 1208 syndrome = cheetah_ecc_syntab[syndrome]; 1209 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum)); 1210 if (ret != -1) 1211 printk("%s" "ERROR(%d): AFAR E-syndrome [%s]\n", 1212 (recoverable ? KERN_WARNING : KERN_CRIT), 1213 smp_processor_id(), unum); 1214 } else if (afsr & MSYND_ERRORS) { 1215 int syndrome; 1216 int ret; 1217 1218 syndrome = (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT; 1219 syndrome = cheetah_mtag_syntab[syndrome]; 1220 ret = sprintf_dimm(syndrome, afar, unum, sizeof(unum)); 1221 if (ret != -1) 1222 printk("%s" "ERROR(%d): AFAR M-syndrome [%s]\n", 1223 (recoverable ? KERN_WARNING : KERN_CRIT), 1224 smp_processor_id(), unum); 1225 } 1226 1227 /* Now dump the cache snapshots. */ 1228 printk("%s" "ERROR(%d): D-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx]\n", 1229 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1230 (int) info->dcache_index, 1231 info->dcache_tag, 1232 info->dcache_utag, 1233 info->dcache_stag); 1234 printk("%s" "ERROR(%d): D-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n", 1235 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1236 info->dcache_data[0], 1237 info->dcache_data[1], 1238 info->dcache_data[2], 1239 info->dcache_data[3]); 1240 printk("%s" "ERROR(%d): I-cache idx[%x] tag[%016llx] utag[%016llx] stag[%016llx] " 1241 "u[%016llx] l[%016llx]\n", 1242 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1243 (int) info->icache_index, 1244 info->icache_tag, 1245 info->icache_utag, 1246 info->icache_stag, 1247 info->icache_upper, 1248 info->icache_lower); 1249 printk("%s" "ERROR(%d): I-cache INSN0[%016llx] INSN1[%016llx] INSN2[%016llx] INSN3[%016llx]\n", 1250 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1251 info->icache_data[0], 1252 info->icache_data[1], 1253 info->icache_data[2], 1254 info->icache_data[3]); 1255 printk("%s" "ERROR(%d): I-cache INSN4[%016llx] INSN5[%016llx] INSN6[%016llx] INSN7[%016llx]\n", 1256 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1257 info->icache_data[4], 1258 info->icache_data[5], 1259 info->icache_data[6], 1260 info->icache_data[7]); 1261 printk("%s" "ERROR(%d): E-cache idx[%x] tag[%016llx]\n", 1262 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1263 (int) info->ecache_index, info->ecache_tag); 1264 printk("%s" "ERROR(%d): E-cache data0[%016llx] data1[%016llx] data2[%016llx] data3[%016llx]\n", 1265 (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(), 1266 info->ecache_data[0], 1267 info->ecache_data[1], 1268 info->ecache_data[2], 1269 info->ecache_data[3]); 1270 1271 afsr = (afsr & ~hipri) & cheetah_afsr_errors; 1272 while (afsr != 0UL) { 1273 unsigned long bit = cheetah_get_hipri(afsr); 1274 1275 printk("%s" "ERROR: Multiple-error (%016lx) \"%s\"\n", 1276 (recoverable ? KERN_WARNING : KERN_CRIT), 1277 bit, cheetah_get_string(bit)); 1278 1279 afsr &= ~bit; 1280 } 1281 1282 if (!recoverable) 1283 printk(KERN_CRIT "ERROR: This condition is not recoverable.\n"); 1284 } 1285 cheetah_recheck_errors(struct cheetah_err_info * logp)1286 static int cheetah_recheck_errors(struct cheetah_err_info *logp) 1287 { 1288 unsigned long afsr, afar; 1289 int ret = 0; 1290 1291 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t" 1292 : "=r" (afsr) 1293 : "i" (ASI_AFSR)); 1294 if ((afsr & cheetah_afsr_errors) != 0) { 1295 if (logp != NULL) { 1296 __asm__ __volatile__("ldxa [%%g0] %1, %0\n\t" 1297 : "=r" (afar) 1298 : "i" (ASI_AFAR)); 1299 logp->afsr = afsr; 1300 logp->afar = afar; 1301 } 1302 ret = 1; 1303 } 1304 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" 1305 "membar #Sync\n\t" 1306 : : "r" (afsr), "i" (ASI_AFSR)); 1307 1308 return ret; 1309 } 1310 cheetah_fecc_handler(struct pt_regs * regs,unsigned long afsr,unsigned long afar)1311 void cheetah_fecc_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar) 1312 { 1313 struct cheetah_err_info local_snapshot, *p; 1314 int recoverable; 1315 1316 /* Flush E-cache */ 1317 cheetah_flush_ecache(); 1318 1319 p = cheetah_get_error_log(afsr); 1320 if (!p) { 1321 prom_printf("ERROR: Early Fast-ECC error afsr[%016lx] afar[%016lx]\n", 1322 afsr, afar); 1323 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n", 1324 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate); 1325 prom_halt(); 1326 } 1327 1328 /* Grab snapshot of logged error. */ 1329 memcpy(&local_snapshot, p, sizeof(local_snapshot)); 1330 1331 /* If the current trap snapshot does not match what the 1332 * trap handler passed along into our args, big trouble. 1333 * In such a case, mark the local copy as invalid. 1334 * 1335 * Else, it matches and we mark the afsr in the non-local 1336 * copy as invalid so we may log new error traps there. 1337 */ 1338 if (p->afsr != afsr || p->afar != afar) 1339 local_snapshot.afsr = CHAFSR_INVALID; 1340 else 1341 p->afsr = CHAFSR_INVALID; 1342 1343 cheetah_flush_icache(); 1344 cheetah_flush_dcache(); 1345 1346 /* Re-enable I-cache/D-cache */ 1347 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1348 "or %%g1, %1, %%g1\n\t" 1349 "stxa %%g1, [%%g0] %0\n\t" 1350 "membar #Sync" 1351 : /* no outputs */ 1352 : "i" (ASI_DCU_CONTROL_REG), 1353 "i" (DCU_DC | DCU_IC) 1354 : "g1"); 1355 1356 /* Re-enable error reporting */ 1357 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1358 "or %%g1, %1, %%g1\n\t" 1359 "stxa %%g1, [%%g0] %0\n\t" 1360 "membar #Sync" 1361 : /* no outputs */ 1362 : "i" (ASI_ESTATE_ERROR_EN), 1363 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN) 1364 : "g1"); 1365 1366 /* Decide if we can continue after handling this trap and 1367 * logging the error. 1368 */ 1369 recoverable = 1; 1370 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP)) 1371 recoverable = 0; 1372 1373 /* Re-check AFSR/AFAR. What we are looking for here is whether a new 1374 * error was logged while we had error reporting traps disabled. 1375 */ 1376 if (cheetah_recheck_errors(&local_snapshot)) { 1377 unsigned long new_afsr = local_snapshot.afsr; 1378 1379 /* If we got a new asynchronous error, die... */ 1380 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU | 1381 CHAFSR_WDU | CHAFSR_CPU | 1382 CHAFSR_IVU | CHAFSR_UE | 1383 CHAFSR_BERR | CHAFSR_TO)) 1384 recoverable = 0; 1385 } 1386 1387 /* Log errors. */ 1388 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable); 1389 1390 if (!recoverable) 1391 panic("Irrecoverable Fast-ECC error trap.\n"); 1392 1393 /* Flush E-cache to kick the error trap handlers out. */ 1394 cheetah_flush_ecache(); 1395 } 1396 1397 /* Try to fix a correctable error by pushing the line out from 1398 * the E-cache. Recheck error reporting registers to see if the 1399 * problem is intermittent. 1400 */ cheetah_fix_ce(unsigned long physaddr)1401 static int cheetah_fix_ce(unsigned long physaddr) 1402 { 1403 unsigned long orig_estate; 1404 unsigned long alias1, alias2; 1405 int ret; 1406 1407 /* Make sure correctable error traps are disabled. */ 1408 __asm__ __volatile__("ldxa [%%g0] %2, %0\n\t" 1409 "andn %0, %1, %%g1\n\t" 1410 "stxa %%g1, [%%g0] %2\n\t" 1411 "membar #Sync" 1412 : "=&r" (orig_estate) 1413 : "i" (ESTATE_ERROR_CEEN), 1414 "i" (ASI_ESTATE_ERROR_EN) 1415 : "g1"); 1416 1417 /* We calculate alias addresses that will force the 1418 * cache line in question out of the E-cache. Then 1419 * we bring it back in with an atomic instruction so 1420 * that we get it in some modified/exclusive state, 1421 * then we displace it again to try and get proper ECC 1422 * pushed back into the system. 1423 */ 1424 physaddr &= ~(8UL - 1UL); 1425 alias1 = (ecache_flush_physbase + 1426 (physaddr & ((ecache_flush_size >> 1) - 1))); 1427 alias2 = alias1 + (ecache_flush_size >> 1); 1428 __asm__ __volatile__("ldxa [%0] %3, %%g0\n\t" 1429 "ldxa [%1] %3, %%g0\n\t" 1430 "casxa [%2] %3, %%g0, %%g0\n\t" 1431 "ldxa [%0] %3, %%g0\n\t" 1432 "ldxa [%1] %3, %%g0\n\t" 1433 "membar #Sync" 1434 : /* no outputs */ 1435 : "r" (alias1), "r" (alias2), 1436 "r" (physaddr), "i" (ASI_PHYS_USE_EC)); 1437 1438 /* Did that trigger another error? */ 1439 if (cheetah_recheck_errors(NULL)) { 1440 /* Try one more time. */ 1441 __asm__ __volatile__("ldxa [%0] %1, %%g0\n\t" 1442 "membar #Sync" 1443 : : "r" (physaddr), "i" (ASI_PHYS_USE_EC)); 1444 if (cheetah_recheck_errors(NULL)) 1445 ret = 2; 1446 else 1447 ret = 1; 1448 } else { 1449 /* No new error, intermittent problem. */ 1450 ret = 0; 1451 } 1452 1453 /* Restore error enables. */ 1454 __asm__ __volatile__("stxa %0, [%%g0] %1\n\t" 1455 "membar #Sync" 1456 : : "r" (orig_estate), "i" (ASI_ESTATE_ERROR_EN)); 1457 1458 return ret; 1459 } 1460 1461 /* Return non-zero if PADDR is a valid physical memory address. */ cheetah_check_main_memory(unsigned long paddr)1462 static int cheetah_check_main_memory(unsigned long paddr) 1463 { 1464 unsigned long vaddr = PAGE_OFFSET + paddr; 1465 1466 if (vaddr > (unsigned long) high_memory) 1467 return 0; 1468 1469 return kern_addr_valid(vaddr); 1470 } 1471 cheetah_cee_handler(struct pt_regs * regs,unsigned long afsr,unsigned long afar)1472 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar) 1473 { 1474 struct cheetah_err_info local_snapshot, *p; 1475 int recoverable, is_memory; 1476 1477 p = cheetah_get_error_log(afsr); 1478 if (!p) { 1479 prom_printf("ERROR: Early CEE error afsr[%016lx] afar[%016lx]\n", 1480 afsr, afar); 1481 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n", 1482 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate); 1483 prom_halt(); 1484 } 1485 1486 /* Grab snapshot of logged error. */ 1487 memcpy(&local_snapshot, p, sizeof(local_snapshot)); 1488 1489 /* If the current trap snapshot does not match what the 1490 * trap handler passed along into our args, big trouble. 1491 * In such a case, mark the local copy as invalid. 1492 * 1493 * Else, it matches and we mark the afsr in the non-local 1494 * copy as invalid so we may log new error traps there. 1495 */ 1496 if (p->afsr != afsr || p->afar != afar) 1497 local_snapshot.afsr = CHAFSR_INVALID; 1498 else 1499 p->afsr = CHAFSR_INVALID; 1500 1501 is_memory = cheetah_check_main_memory(afar); 1502 1503 if (is_memory && (afsr & CHAFSR_CE) != 0UL) { 1504 /* XXX Might want to log the results of this operation 1505 * XXX somewhere... -DaveM 1506 */ 1507 cheetah_fix_ce(afar); 1508 } 1509 1510 { 1511 int flush_all, flush_line; 1512 1513 flush_all = flush_line = 0; 1514 if ((afsr & CHAFSR_EDC) != 0UL) { 1515 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDC) 1516 flush_line = 1; 1517 else 1518 flush_all = 1; 1519 } else if ((afsr & CHAFSR_CPC) != 0UL) { 1520 if ((afsr & cheetah_afsr_errors) == CHAFSR_CPC) 1521 flush_line = 1; 1522 else 1523 flush_all = 1; 1524 } 1525 1526 /* Trap handler only disabled I-cache, flush it. */ 1527 cheetah_flush_icache(); 1528 1529 /* Re-enable I-cache */ 1530 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1531 "or %%g1, %1, %%g1\n\t" 1532 "stxa %%g1, [%%g0] %0\n\t" 1533 "membar #Sync" 1534 : /* no outputs */ 1535 : "i" (ASI_DCU_CONTROL_REG), 1536 "i" (DCU_IC) 1537 : "g1"); 1538 1539 if (flush_all) 1540 cheetah_flush_ecache(); 1541 else if (flush_line) 1542 cheetah_flush_ecache_line(afar); 1543 } 1544 1545 /* Re-enable error reporting */ 1546 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1547 "or %%g1, %1, %%g1\n\t" 1548 "stxa %%g1, [%%g0] %0\n\t" 1549 "membar #Sync" 1550 : /* no outputs */ 1551 : "i" (ASI_ESTATE_ERROR_EN), 1552 "i" (ESTATE_ERROR_CEEN) 1553 : "g1"); 1554 1555 /* Decide if we can continue after handling this trap and 1556 * logging the error. 1557 */ 1558 recoverable = 1; 1559 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP)) 1560 recoverable = 0; 1561 1562 /* Re-check AFSR/AFAR */ 1563 (void) cheetah_recheck_errors(&local_snapshot); 1564 1565 /* Log errors. */ 1566 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable); 1567 1568 if (!recoverable) 1569 panic("Irrecoverable Correctable-ECC error trap.\n"); 1570 } 1571 cheetah_deferred_handler(struct pt_regs * regs,unsigned long afsr,unsigned long afar)1572 void cheetah_deferred_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar) 1573 { 1574 struct cheetah_err_info local_snapshot, *p; 1575 int recoverable, is_memory; 1576 1577 #ifdef CONFIG_PCI 1578 /* Check for the special PCI poke sequence. */ 1579 if (pci_poke_in_progress && pci_poke_cpu == smp_processor_id()) { 1580 cheetah_flush_icache(); 1581 cheetah_flush_dcache(); 1582 1583 /* Re-enable I-cache/D-cache */ 1584 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1585 "or %%g1, %1, %%g1\n\t" 1586 "stxa %%g1, [%%g0] %0\n\t" 1587 "membar #Sync" 1588 : /* no outputs */ 1589 : "i" (ASI_DCU_CONTROL_REG), 1590 "i" (DCU_DC | DCU_IC) 1591 : "g1"); 1592 1593 /* Re-enable error reporting */ 1594 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1595 "or %%g1, %1, %%g1\n\t" 1596 "stxa %%g1, [%%g0] %0\n\t" 1597 "membar #Sync" 1598 : /* no outputs */ 1599 : "i" (ASI_ESTATE_ERROR_EN), 1600 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN) 1601 : "g1"); 1602 1603 (void) cheetah_recheck_errors(NULL); 1604 1605 pci_poke_faulted = 1; 1606 regs->tpc += 4; 1607 regs->tnpc = regs->tpc + 4; 1608 return; 1609 } 1610 #endif 1611 1612 p = cheetah_get_error_log(afsr); 1613 if (!p) { 1614 prom_printf("ERROR: Early deferred error afsr[%016lx] afar[%016lx]\n", 1615 afsr, afar); 1616 prom_printf("ERROR: CPU(%d) TPC[%016lx] TNPC[%016lx] TSTATE[%016lx]\n", 1617 smp_processor_id(), regs->tpc, regs->tnpc, regs->tstate); 1618 prom_halt(); 1619 } 1620 1621 /* Grab snapshot of logged error. */ 1622 memcpy(&local_snapshot, p, sizeof(local_snapshot)); 1623 1624 /* If the current trap snapshot does not match what the 1625 * trap handler passed along into our args, big trouble. 1626 * In such a case, mark the local copy as invalid. 1627 * 1628 * Else, it matches and we mark the afsr in the non-local 1629 * copy as invalid so we may log new error traps there. 1630 */ 1631 if (p->afsr != afsr || p->afar != afar) 1632 local_snapshot.afsr = CHAFSR_INVALID; 1633 else 1634 p->afsr = CHAFSR_INVALID; 1635 1636 is_memory = cheetah_check_main_memory(afar); 1637 1638 { 1639 int flush_all, flush_line; 1640 1641 flush_all = flush_line = 0; 1642 if ((afsr & CHAFSR_EDU) != 0UL) { 1643 if ((afsr & cheetah_afsr_errors) == CHAFSR_EDU) 1644 flush_line = 1; 1645 else 1646 flush_all = 1; 1647 } else if ((afsr & CHAFSR_BERR) != 0UL) { 1648 if ((afsr & cheetah_afsr_errors) == CHAFSR_BERR) 1649 flush_line = 1; 1650 else 1651 flush_all = 1; 1652 } 1653 1654 cheetah_flush_icache(); 1655 cheetah_flush_dcache(); 1656 1657 /* Re-enable I/D caches */ 1658 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1659 "or %%g1, %1, %%g1\n\t" 1660 "stxa %%g1, [%%g0] %0\n\t" 1661 "membar #Sync" 1662 : /* no outputs */ 1663 : "i" (ASI_DCU_CONTROL_REG), 1664 "i" (DCU_IC | DCU_DC) 1665 : "g1"); 1666 1667 if (flush_all) 1668 cheetah_flush_ecache(); 1669 else if (flush_line) 1670 cheetah_flush_ecache_line(afar); 1671 } 1672 1673 /* Re-enable error reporting */ 1674 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1675 "or %%g1, %1, %%g1\n\t" 1676 "stxa %%g1, [%%g0] %0\n\t" 1677 "membar #Sync" 1678 : /* no outputs */ 1679 : "i" (ASI_ESTATE_ERROR_EN), 1680 "i" (ESTATE_ERROR_NCEEN | ESTATE_ERROR_CEEN) 1681 : "g1"); 1682 1683 /* Decide if we can continue after handling this trap and 1684 * logging the error. 1685 */ 1686 recoverable = 1; 1687 if (afsr & (CHAFSR_PERR | CHAFSR_IERR | CHAFSR_ISAP)) 1688 recoverable = 0; 1689 1690 /* Re-check AFSR/AFAR. What we are looking for here is whether a new 1691 * error was logged while we had error reporting traps disabled. 1692 */ 1693 if (cheetah_recheck_errors(&local_snapshot)) { 1694 unsigned long new_afsr = local_snapshot.afsr; 1695 1696 /* If we got a new asynchronous error, die... */ 1697 if (new_afsr & (CHAFSR_EMU | CHAFSR_EDU | 1698 CHAFSR_WDU | CHAFSR_CPU | 1699 CHAFSR_IVU | CHAFSR_UE | 1700 CHAFSR_BERR | CHAFSR_TO)) 1701 recoverable = 0; 1702 } 1703 1704 /* Log errors. */ 1705 cheetah_log_errors(regs, &local_snapshot, afsr, afar, recoverable); 1706 1707 /* "Recoverable" here means we try to yank the page from ever 1708 * being newly used again. This depends upon a few things: 1709 * 1) Must be main memory, and AFAR must be valid. 1710 * 2) If we trapped from user, OK. 1711 * 3) Else, if we trapped from kernel we must find exception 1712 * table entry (ie. we have to have been accessing user 1713 * space). 1714 * 1715 * If AFAR is not in main memory, or we trapped from kernel 1716 * and cannot find an exception table entry, it is unacceptable 1717 * to try and continue. 1718 */ 1719 if (recoverable && is_memory) { 1720 if ((regs->tstate & TSTATE_PRIV) == 0UL) { 1721 /* OK, usermode access. */ 1722 recoverable = 1; 1723 } else { 1724 const struct exception_table_entry *entry; 1725 1726 entry = search_exception_tables(regs->tpc); 1727 if (entry) { 1728 /* OK, kernel access to userspace. */ 1729 recoverable = 1; 1730 1731 } else { 1732 /* BAD, privileged state is corrupted. */ 1733 recoverable = 0; 1734 } 1735 1736 if (recoverable) { 1737 if (pfn_valid(afar >> PAGE_SHIFT)) 1738 get_page(pfn_to_page(afar >> PAGE_SHIFT)); 1739 else 1740 recoverable = 0; 1741 1742 /* Only perform fixup if we still have a 1743 * recoverable condition. 1744 */ 1745 if (recoverable) { 1746 regs->tpc = entry->fixup; 1747 regs->tnpc = regs->tpc + 4; 1748 } 1749 } 1750 } 1751 } else { 1752 recoverable = 0; 1753 } 1754 1755 if (!recoverable) 1756 panic("Irrecoverable deferred error trap.\n"); 1757 } 1758 1759 /* Handle a D/I cache parity error trap. TYPE is encoded as: 1760 * 1761 * Bit0: 0=dcache,1=icache 1762 * Bit1: 0=recoverable,1=unrecoverable 1763 * 1764 * The hardware has disabled both the I-cache and D-cache in 1765 * the %dcr register. 1766 */ cheetah_plus_parity_error(int type,struct pt_regs * regs)1767 void cheetah_plus_parity_error(int type, struct pt_regs *regs) 1768 { 1769 if (type & 0x1) 1770 __cheetah_flush_icache(); 1771 else 1772 cheetah_plus_zap_dcache_parity(); 1773 cheetah_flush_dcache(); 1774 1775 /* Re-enable I-cache/D-cache */ 1776 __asm__ __volatile__("ldxa [%%g0] %0, %%g1\n\t" 1777 "or %%g1, %1, %%g1\n\t" 1778 "stxa %%g1, [%%g0] %0\n\t" 1779 "membar #Sync" 1780 : /* no outputs */ 1781 : "i" (ASI_DCU_CONTROL_REG), 1782 "i" (DCU_DC | DCU_IC) 1783 : "g1"); 1784 1785 if (type & 0x2) { 1786 printk(KERN_EMERG "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n", 1787 smp_processor_id(), 1788 (type & 0x1) ? 'I' : 'D', 1789 regs->tpc); 1790 printk(KERN_EMERG "TPC<%pS>\n", (void *) regs->tpc); 1791 panic("Irrecoverable Cheetah+ parity error."); 1792 } 1793 1794 printk(KERN_WARNING "CPU[%d]: Cheetah+ %c-cache parity error at TPC[%016lx]\n", 1795 smp_processor_id(), 1796 (type & 0x1) ? 'I' : 'D', 1797 regs->tpc); 1798 printk(KERN_WARNING "TPC<%pS>\n", (void *) regs->tpc); 1799 } 1800 1801 struct sun4v_error_entry { 1802 /* Unique error handle */ 1803 /*0x00*/u64 err_handle; 1804 1805 /* %stick value at the time of the error */ 1806 /*0x08*/u64 err_stick; 1807 1808 /*0x10*/u8 reserved_1[3]; 1809 1810 /* Error type */ 1811 /*0x13*/u8 err_type; 1812 #define SUN4V_ERR_TYPE_UNDEFINED 0 1813 #define SUN4V_ERR_TYPE_UNCORRECTED_RES 1 1814 #define SUN4V_ERR_TYPE_PRECISE_NONRES 2 1815 #define SUN4V_ERR_TYPE_DEFERRED_NONRES 3 1816 #define SUN4V_ERR_TYPE_SHUTDOWN_RQST 4 1817 #define SUN4V_ERR_TYPE_DUMP_CORE 5 1818 #define SUN4V_ERR_TYPE_SP_STATE_CHANGE 6 1819 #define SUN4V_ERR_TYPE_NUM 7 1820 1821 /* Error attributes */ 1822 /*0x14*/u32 err_attrs; 1823 #define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001 1824 #define SUN4V_ERR_ATTRS_MEMORY 0x00000002 1825 #define SUN4V_ERR_ATTRS_PIO 0x00000004 1826 #define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008 1827 #define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010 1828 #define SUN4V_ERR_ATTRS_SHUTDOWN_RQST 0x00000020 1829 #define SUN4V_ERR_ATTRS_ASR 0x00000040 1830 #define SUN4V_ERR_ATTRS_ASI 0x00000080 1831 #define SUN4V_ERR_ATTRS_PRIV_REG 0x00000100 1832 #define SUN4V_ERR_ATTRS_SPSTATE_MSK 0x00000600 1833 #define SUN4V_ERR_ATTRS_MCD 0x00000800 1834 #define SUN4V_ERR_ATTRS_SPSTATE_SHFT 9 1835 #define SUN4V_ERR_ATTRS_MODE_MSK 0x03000000 1836 #define SUN4V_ERR_ATTRS_MODE_SHFT 24 1837 #define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000 1838 1839 #define SUN4V_ERR_SPSTATE_FAULTED 0 1840 #define SUN4V_ERR_SPSTATE_AVAILABLE 1 1841 #define SUN4V_ERR_SPSTATE_NOT_PRESENT 2 1842 1843 #define SUN4V_ERR_MODE_USER 1 1844 #define SUN4V_ERR_MODE_PRIV 2 1845 1846 /* Real address of the memory region or PIO transaction */ 1847 /*0x18*/u64 err_raddr; 1848 1849 /* Size of the operation triggering the error, in bytes */ 1850 /*0x20*/u32 err_size; 1851 1852 /* ID of the CPU */ 1853 /*0x24*/u16 err_cpu; 1854 1855 /* Grace periof for shutdown, in seconds */ 1856 /*0x26*/u16 err_secs; 1857 1858 /* Value of the %asi register */ 1859 /*0x28*/u8 err_asi; 1860 1861 /*0x29*/u8 reserved_2; 1862 1863 /* Value of the ASR register number */ 1864 /*0x2a*/u16 err_asr; 1865 #define SUN4V_ERR_ASR_VALID 0x8000 1866 1867 /*0x2c*/u32 reserved_3; 1868 /*0x30*/u64 reserved_4; 1869 /*0x38*/u64 reserved_5; 1870 }; 1871 1872 static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0); 1873 static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0); 1874 sun4v_err_type_to_str(u8 type)1875 static const char *sun4v_err_type_to_str(u8 type) 1876 { 1877 static const char *types[SUN4V_ERR_TYPE_NUM] = { 1878 "undefined", 1879 "uncorrected resumable", 1880 "precise nonresumable", 1881 "deferred nonresumable", 1882 "shutdown request", 1883 "dump core", 1884 "SP state change", 1885 }; 1886 1887 if (type < SUN4V_ERR_TYPE_NUM) 1888 return types[type]; 1889 1890 return "unknown"; 1891 } 1892 sun4v_emit_err_attr_strings(u32 attrs)1893 static void sun4v_emit_err_attr_strings(u32 attrs) 1894 { 1895 static const char *attr_names[] = { 1896 "processor", 1897 "memory", 1898 "PIO", 1899 "int-registers", 1900 "fpu-registers", 1901 "shutdown-request", 1902 "ASR", 1903 "ASI", 1904 "priv-reg", 1905 }; 1906 static const char *sp_states[] = { 1907 "sp-faulted", 1908 "sp-available", 1909 "sp-not-present", 1910 "sp-state-reserved", 1911 }; 1912 static const char *modes[] = { 1913 "mode-reserved0", 1914 "user", 1915 "priv", 1916 "mode-reserved1", 1917 }; 1918 u32 sp_state, mode; 1919 int i; 1920 1921 for (i = 0; i < ARRAY_SIZE(attr_names); i++) { 1922 if (attrs & (1U << i)) { 1923 const char *s = attr_names[i]; 1924 1925 pr_cont("%s ", s); 1926 } 1927 } 1928 1929 sp_state = ((attrs & SUN4V_ERR_ATTRS_SPSTATE_MSK) >> 1930 SUN4V_ERR_ATTRS_SPSTATE_SHFT); 1931 pr_cont("%s ", sp_states[sp_state]); 1932 1933 mode = ((attrs & SUN4V_ERR_ATTRS_MODE_MSK) >> 1934 SUN4V_ERR_ATTRS_MODE_SHFT); 1935 pr_cont("%s ", modes[mode]); 1936 1937 if (attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) 1938 pr_cont("res-queue-full "); 1939 } 1940 1941 /* When the report contains a real-address of "-1" it means that the 1942 * hardware did not provide the address. So we compute the effective 1943 * address of the load or store instruction at regs->tpc and report 1944 * that. Usually when this happens it's a PIO and in such a case we 1945 * are using physical addresses with bypass ASIs anyways, so what we 1946 * report here is exactly what we want. 1947 */ sun4v_report_real_raddr(const char * pfx,struct pt_regs * regs)1948 static void sun4v_report_real_raddr(const char *pfx, struct pt_regs *regs) 1949 { 1950 unsigned int insn; 1951 u64 addr; 1952 1953 if (!(regs->tstate & TSTATE_PRIV)) 1954 return; 1955 1956 insn = *(unsigned int *) regs->tpc; 1957 1958 addr = compute_effective_address(regs, insn, 0); 1959 1960 printk("%s: insn effective address [0x%016llx]\n", 1961 pfx, addr); 1962 } 1963 sun4v_log_error(struct pt_regs * regs,struct sun4v_error_entry * ent,int cpu,const char * pfx,atomic_t * ocnt)1964 static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, 1965 int cpu, const char *pfx, atomic_t *ocnt) 1966 { 1967 u64 *raw_ptr = (u64 *) ent; 1968 u32 attrs; 1969 int cnt; 1970 1971 printk("%s: Reporting on cpu %d\n", pfx, cpu); 1972 printk("%s: TPC [0x%016lx] <%pS>\n", 1973 pfx, regs->tpc, (void *) regs->tpc); 1974 1975 printk("%s: RAW [%016llx:%016llx:%016llx:%016llx\n", 1976 pfx, raw_ptr[0], raw_ptr[1], raw_ptr[2], raw_ptr[3]); 1977 printk("%s: %016llx:%016llx:%016llx:%016llx]\n", 1978 pfx, raw_ptr[4], raw_ptr[5], raw_ptr[6], raw_ptr[7]); 1979 1980 printk("%s: handle [0x%016llx] stick [0x%016llx]\n", 1981 pfx, ent->err_handle, ent->err_stick); 1982 1983 printk("%s: type [%s]\n", pfx, sun4v_err_type_to_str(ent->err_type)); 1984 1985 attrs = ent->err_attrs; 1986 printk("%s: attrs [0x%08x] < ", pfx, attrs); 1987 sun4v_emit_err_attr_strings(attrs); 1988 pr_cont(">\n"); 1989 1990 /* Various fields in the error report are only valid if 1991 * certain attribute bits are set. 1992 */ 1993 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | 1994 SUN4V_ERR_ATTRS_PIO | 1995 SUN4V_ERR_ATTRS_ASI)) { 1996 printk("%s: raddr [0x%016llx]\n", pfx, ent->err_raddr); 1997 1998 if (ent->err_raddr == ~(u64)0) 1999 sun4v_report_real_raddr(pfx, regs); 2000 } 2001 2002 if (attrs & (SUN4V_ERR_ATTRS_MEMORY | SUN4V_ERR_ATTRS_ASI)) 2003 printk("%s: size [0x%x]\n", pfx, ent->err_size); 2004 2005 if (attrs & (SUN4V_ERR_ATTRS_PROCESSOR | 2006 SUN4V_ERR_ATTRS_INT_REGISTERS | 2007 SUN4V_ERR_ATTRS_FPU_REGISTERS | 2008 SUN4V_ERR_ATTRS_PRIV_REG)) 2009 printk("%s: cpu[%u]\n", pfx, ent->err_cpu); 2010 2011 if (attrs & SUN4V_ERR_ATTRS_ASI) 2012 printk("%s: asi [0x%02x]\n", pfx, ent->err_asi); 2013 2014 if ((attrs & (SUN4V_ERR_ATTRS_INT_REGISTERS | 2015 SUN4V_ERR_ATTRS_FPU_REGISTERS | 2016 SUN4V_ERR_ATTRS_PRIV_REG)) && 2017 (ent->err_asr & SUN4V_ERR_ASR_VALID) != 0) 2018 printk("%s: reg [0x%04x]\n", 2019 pfx, ent->err_asr & ~SUN4V_ERR_ASR_VALID); 2020 2021 show_regs(regs); 2022 2023 if ((cnt = atomic_read(ocnt)) != 0) { 2024 atomic_set(ocnt, 0); 2025 wmb(); 2026 printk("%s: Queue overflowed %d times.\n", 2027 pfx, cnt); 2028 } 2029 } 2030 2031 /* Handle memory corruption detected error which is vectored in 2032 * through resumable error trap. 2033 */ do_mcd_err(struct pt_regs * regs,struct sun4v_error_entry ent)2034 void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent) 2035 { 2036 if (notify_die(DIE_TRAP, "MCD error", regs, 0, 0x34, 2037 SIGSEGV) == NOTIFY_STOP) 2038 return; 2039 2040 if (regs->tstate & TSTATE_PRIV) { 2041 /* MCD exception could happen because the task was 2042 * running a system call with MCD enabled and passed a 2043 * non-versioned pointer or pointer with bad version 2044 * tag to the system call. In such cases, hypervisor 2045 * places the address of offending instruction in the 2046 * resumable error report. This is a deferred error, 2047 * so the read/write that caused the trap was potentially 2048 * retired long time back and we may have no choice 2049 * but to send SIGSEGV to the process. 2050 */ 2051 const struct exception_table_entry *entry; 2052 2053 entry = search_exception_tables(regs->tpc); 2054 if (entry) { 2055 /* Looks like a bad syscall parameter */ 2056 #ifdef DEBUG_EXCEPTIONS 2057 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n", 2058 regs->tpc); 2059 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n", 2060 ent.err_raddr, entry->fixup); 2061 #endif 2062 regs->tpc = entry->fixup; 2063 regs->tnpc = regs->tpc + 4; 2064 return; 2065 } 2066 } 2067 2068 /* Send SIGSEGV to the userspace process with the right signal 2069 * code 2070 */ 2071 force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr); 2072 } 2073 2074 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate. 2075 * Log the event and clear the first word of the entry. 2076 */ sun4v_resum_error(struct pt_regs * regs,unsigned long offset)2077 void sun4v_resum_error(struct pt_regs *regs, unsigned long offset) 2078 { 2079 enum ctx_state prev_state = exception_enter(); 2080 struct sun4v_error_entry *ent, local_copy; 2081 struct trap_per_cpu *tb; 2082 unsigned long paddr; 2083 int cpu; 2084 2085 cpu = get_cpu(); 2086 2087 tb = &trap_block[cpu]; 2088 paddr = tb->resum_kernel_buf_pa + offset; 2089 ent = __va(paddr); 2090 2091 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry)); 2092 2093 /* We have a local copy now, so release the entry. */ 2094 ent->err_handle = 0; 2095 wmb(); 2096 2097 put_cpu(); 2098 2099 if (local_copy.err_type == SUN4V_ERR_TYPE_SHUTDOWN_RQST) { 2100 /* We should really take the seconds field of 2101 * the error report and use it for the shutdown 2102 * invocation, but for now do the same thing we 2103 * do for a DS shutdown request. 2104 */ 2105 pr_info("Shutdown request, %u seconds...\n", 2106 local_copy.err_secs); 2107 orderly_poweroff(true); 2108 goto out; 2109 } 2110 2111 /* If this is a memory corruption detected error vectored in 2112 * by HV through resumable error trap, call the handler 2113 */ 2114 if (local_copy.err_attrs & SUN4V_ERR_ATTRS_MCD) { 2115 do_mcd_err(regs, local_copy); 2116 return; 2117 } 2118 2119 sun4v_log_error(regs, &local_copy, cpu, 2120 KERN_ERR "RESUMABLE ERROR", 2121 &sun4v_resum_oflow_cnt); 2122 out: 2123 exception_exit(prev_state); 2124 } 2125 2126 /* If we try to printk() we'll probably make matters worse, by trying 2127 * to retake locks this cpu already holds or causing more errors. So 2128 * just bump a counter, and we'll report these counter bumps above. 2129 */ sun4v_resum_overflow(struct pt_regs * regs)2130 void sun4v_resum_overflow(struct pt_regs *regs) 2131 { 2132 atomic_inc(&sun4v_resum_oflow_cnt); 2133 } 2134 2135 /* Given a set of registers, get the virtual addressi that was being accessed 2136 * by the faulting instructions at tpc. 2137 */ sun4v_get_vaddr(struct pt_regs * regs)2138 static unsigned long sun4v_get_vaddr(struct pt_regs *regs) 2139 { 2140 unsigned int insn; 2141 2142 if (!copy_from_user(&insn, (void __user *)regs->tpc, 4)) { 2143 return compute_effective_address(regs, insn, 2144 (insn >> 25) & 0x1f); 2145 } 2146 return 0; 2147 } 2148 2149 /* Attempt to handle non-resumable errors generated from userspace. 2150 * Returns true if the signal was handled, false otherwise. 2151 */ sun4v_nonresum_error_user_handled(struct pt_regs * regs,struct sun4v_error_entry * ent)2152 bool sun4v_nonresum_error_user_handled(struct pt_regs *regs, 2153 struct sun4v_error_entry *ent) { 2154 2155 unsigned int attrs = ent->err_attrs; 2156 2157 if (attrs & SUN4V_ERR_ATTRS_MEMORY) { 2158 unsigned long addr = ent->err_raddr; 2159 2160 if (addr == ~(u64)0) { 2161 /* This seems highly unlikely to ever occur */ 2162 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory error detected in unknown location!\n"); 2163 } else { 2164 unsigned long page_cnt = DIV_ROUND_UP(ent->err_size, 2165 PAGE_SIZE); 2166 2167 /* Break the unfortunate news. */ 2168 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Memory failed at %016lX\n", 2169 addr); 2170 pr_emerg("SUN4V NON-RECOVERABLE ERROR: Claiming %lu ages.\n", 2171 page_cnt); 2172 2173 while (page_cnt-- > 0) { 2174 if (pfn_valid(addr >> PAGE_SHIFT)) 2175 get_page(pfn_to_page(addr >> PAGE_SHIFT)); 2176 addr += PAGE_SIZE; 2177 } 2178 } 2179 force_sig(SIGKILL); 2180 2181 return true; 2182 } 2183 if (attrs & SUN4V_ERR_ATTRS_PIO) { 2184 force_sig_fault(SIGBUS, BUS_ADRERR, 2185 (void __user *)sun4v_get_vaddr(regs)); 2186 return true; 2187 } 2188 2189 /* Default to doing nothing */ 2190 return false; 2191 } 2192 2193 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate. 2194 * Log the event, clear the first word of the entry, and die. 2195 */ sun4v_nonresum_error(struct pt_regs * regs,unsigned long offset)2196 void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset) 2197 { 2198 struct sun4v_error_entry *ent, local_copy; 2199 struct trap_per_cpu *tb; 2200 unsigned long paddr; 2201 int cpu; 2202 2203 cpu = get_cpu(); 2204 2205 tb = &trap_block[cpu]; 2206 paddr = tb->nonresum_kernel_buf_pa + offset; 2207 ent = __va(paddr); 2208 2209 memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry)); 2210 2211 /* We have a local copy now, so release the entry. */ 2212 ent->err_handle = 0; 2213 wmb(); 2214 2215 put_cpu(); 2216 2217 if (!(regs->tstate & TSTATE_PRIV) && 2218 sun4v_nonresum_error_user_handled(regs, &local_copy)) { 2219 /* DON'T PANIC: This userspace error was handled. */ 2220 return; 2221 } 2222 2223 #ifdef CONFIG_PCI 2224 /* Check for the special PCI poke sequence. */ 2225 if (pci_poke_in_progress && pci_poke_cpu == cpu) { 2226 pci_poke_faulted = 1; 2227 regs->tpc += 4; 2228 regs->tnpc = regs->tpc + 4; 2229 return; 2230 } 2231 #endif 2232 2233 sun4v_log_error(regs, &local_copy, cpu, 2234 KERN_EMERG "NON-RESUMABLE ERROR", 2235 &sun4v_nonresum_oflow_cnt); 2236 2237 panic("Non-resumable error."); 2238 } 2239 2240 /* If we try to printk() we'll probably make matters worse, by trying 2241 * to retake locks this cpu already holds or causing more errors. So 2242 * just bump a counter, and we'll report these counter bumps above. 2243 */ sun4v_nonresum_overflow(struct pt_regs * regs)2244 void sun4v_nonresum_overflow(struct pt_regs *regs) 2245 { 2246 /* XXX Actually even this can make not that much sense. Perhaps 2247 * XXX we should just pull the plug and panic directly from here? 2248 */ 2249 atomic_inc(&sun4v_nonresum_oflow_cnt); 2250 } 2251 sun4v_tlb_error(struct pt_regs * regs)2252 static void sun4v_tlb_error(struct pt_regs *regs) 2253 { 2254 die_if_kernel("TLB/TSB error", regs); 2255 } 2256 2257 unsigned long sun4v_err_itlb_vaddr; 2258 unsigned long sun4v_err_itlb_ctx; 2259 unsigned long sun4v_err_itlb_pte; 2260 unsigned long sun4v_err_itlb_error; 2261 sun4v_itlb_error_report(struct pt_regs * regs,int tl)2262 void sun4v_itlb_error_report(struct pt_regs *regs, int tl) 2263 { 2264 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2265 2266 printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n", 2267 regs->tpc, tl); 2268 printk(KERN_EMERG "SUN4V-ITLB: TPC<%pS>\n", (void *) regs->tpc); 2269 printk(KERN_EMERG "SUN4V-ITLB: O7[%lx]\n", regs->u_regs[UREG_I7]); 2270 printk(KERN_EMERG "SUN4V-ITLB: O7<%pS>\n", 2271 (void *) regs->u_regs[UREG_I7]); 2272 printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] " 2273 "pte[%lx] error[%lx]\n", 2274 sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx, 2275 sun4v_err_itlb_pte, sun4v_err_itlb_error); 2276 2277 sun4v_tlb_error(regs); 2278 } 2279 2280 unsigned long sun4v_err_dtlb_vaddr; 2281 unsigned long sun4v_err_dtlb_ctx; 2282 unsigned long sun4v_err_dtlb_pte; 2283 unsigned long sun4v_err_dtlb_error; 2284 sun4v_dtlb_error_report(struct pt_regs * regs,int tl)2285 void sun4v_dtlb_error_report(struct pt_regs *regs, int tl) 2286 { 2287 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2288 2289 printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n", 2290 regs->tpc, tl); 2291 printk(KERN_EMERG "SUN4V-DTLB: TPC<%pS>\n", (void *) regs->tpc); 2292 printk(KERN_EMERG "SUN4V-DTLB: O7[%lx]\n", regs->u_regs[UREG_I7]); 2293 printk(KERN_EMERG "SUN4V-DTLB: O7<%pS>\n", 2294 (void *) regs->u_regs[UREG_I7]); 2295 printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] " 2296 "pte[%lx] error[%lx]\n", 2297 sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx, 2298 sun4v_err_dtlb_pte, sun4v_err_dtlb_error); 2299 2300 sun4v_tlb_error(regs); 2301 } 2302 hypervisor_tlbop_error(unsigned long err,unsigned long op)2303 void hypervisor_tlbop_error(unsigned long err, unsigned long op) 2304 { 2305 printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n", 2306 err, op); 2307 } 2308 hypervisor_tlbop_error_xcall(unsigned long err,unsigned long op)2309 void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op) 2310 { 2311 printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n", 2312 err, op); 2313 } 2314 do_fpe_common(struct pt_regs * regs)2315 static void do_fpe_common(struct pt_regs *regs) 2316 { 2317 if (regs->tstate & TSTATE_PRIV) { 2318 regs->tpc = regs->tnpc; 2319 regs->tnpc += 4; 2320 } else { 2321 unsigned long fsr = current_thread_info()->xfsr[0]; 2322 int code; 2323 2324 if (test_thread_flag(TIF_32BIT)) { 2325 regs->tpc &= 0xffffffff; 2326 regs->tnpc &= 0xffffffff; 2327 } 2328 code = FPE_FLTUNK; 2329 if ((fsr & 0x1c000) == (1 << 14)) { 2330 if (fsr & 0x10) 2331 code = FPE_FLTINV; 2332 else if (fsr & 0x08) 2333 code = FPE_FLTOVF; 2334 else if (fsr & 0x04) 2335 code = FPE_FLTUND; 2336 else if (fsr & 0x02) 2337 code = FPE_FLTDIV; 2338 else if (fsr & 0x01) 2339 code = FPE_FLTRES; 2340 } 2341 force_sig_fault(SIGFPE, code, (void __user *)regs->tpc); 2342 } 2343 } 2344 do_fpieee(struct pt_regs * regs)2345 void do_fpieee(struct pt_regs *regs) 2346 { 2347 enum ctx_state prev_state = exception_enter(); 2348 2349 if (notify_die(DIE_TRAP, "fpu exception ieee", regs, 2350 0, 0x24, SIGFPE) == NOTIFY_STOP) 2351 goto out; 2352 2353 do_fpe_common(regs); 2354 out: 2355 exception_exit(prev_state); 2356 } 2357 do_fpother(struct pt_regs * regs)2358 void do_fpother(struct pt_regs *regs) 2359 { 2360 enum ctx_state prev_state = exception_enter(); 2361 struct fpustate *f = FPUSTATE; 2362 int ret = 0; 2363 2364 if (notify_die(DIE_TRAP, "fpu exception other", regs, 2365 0, 0x25, SIGFPE) == NOTIFY_STOP) 2366 goto out; 2367 2368 switch ((current_thread_info()->xfsr[0] & 0x1c000)) { 2369 case (2 << 14): /* unfinished_FPop */ 2370 case (3 << 14): /* unimplemented_FPop */ 2371 ret = do_mathemu(regs, f, false); 2372 break; 2373 } 2374 if (ret) 2375 goto out; 2376 do_fpe_common(regs); 2377 out: 2378 exception_exit(prev_state); 2379 } 2380 do_tof(struct pt_regs * regs)2381 void do_tof(struct pt_regs *regs) 2382 { 2383 enum ctx_state prev_state = exception_enter(); 2384 2385 if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs, 2386 0, 0x26, SIGEMT) == NOTIFY_STOP) 2387 goto out; 2388 2389 if (regs->tstate & TSTATE_PRIV) 2390 die_if_kernel("Penguin overflow trap from kernel mode", regs); 2391 if (test_thread_flag(TIF_32BIT)) { 2392 regs->tpc &= 0xffffffff; 2393 regs->tnpc &= 0xffffffff; 2394 } 2395 force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc); 2396 out: 2397 exception_exit(prev_state); 2398 } 2399 do_div0(struct pt_regs * regs)2400 void do_div0(struct pt_regs *regs) 2401 { 2402 enum ctx_state prev_state = exception_enter(); 2403 2404 if (notify_die(DIE_TRAP, "integer division by zero", regs, 2405 0, 0x28, SIGFPE) == NOTIFY_STOP) 2406 goto out; 2407 2408 if (regs->tstate & TSTATE_PRIV) 2409 die_if_kernel("TL0: Kernel divide by zero.", regs); 2410 if (test_thread_flag(TIF_32BIT)) { 2411 regs->tpc &= 0xffffffff; 2412 regs->tnpc &= 0xffffffff; 2413 } 2414 force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc); 2415 out: 2416 exception_exit(prev_state); 2417 } 2418 instruction_dump(unsigned int * pc)2419 static void instruction_dump(unsigned int *pc) 2420 { 2421 int i; 2422 2423 if ((((unsigned long) pc) & 3)) 2424 return; 2425 2426 printk("Instruction DUMP:"); 2427 for (i = -3; i < 6; i++) 2428 printk("%c%08x%c",i?' ':'<',pc[i],i?' ':'>'); 2429 printk("\n"); 2430 } 2431 user_instruction_dump(unsigned int __user * pc)2432 static void user_instruction_dump(unsigned int __user *pc) 2433 { 2434 int i; 2435 unsigned int buf[9]; 2436 2437 if ((((unsigned long) pc) & 3)) 2438 return; 2439 2440 if (copy_from_user(buf, pc - 3, sizeof(buf))) 2441 return; 2442 2443 printk("Instruction DUMP:"); 2444 for (i = 0; i < 9; i++) 2445 printk("%c%08x%c",i==3?' ':'<',buf[i],i==3?' ':'>'); 2446 printk("\n"); 2447 } 2448 show_stack(struct task_struct * tsk,unsigned long * _ksp,const char * loglvl)2449 void show_stack(struct task_struct *tsk, unsigned long *_ksp, const char *loglvl) 2450 { 2451 unsigned long fp, ksp; 2452 struct thread_info *tp; 2453 int count = 0; 2454 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 2455 int graph = 0; 2456 #endif 2457 2458 ksp = (unsigned long) _ksp; 2459 if (!tsk) 2460 tsk = current; 2461 tp = task_thread_info(tsk); 2462 if (ksp == 0UL) { 2463 if (tsk == current) 2464 asm("mov %%fp, %0" : "=r" (ksp)); 2465 else 2466 ksp = tp->ksp; 2467 } 2468 if (tp == current_thread_info()) 2469 flushw_all(); 2470 2471 fp = ksp + STACK_BIAS; 2472 2473 printk("%sCall Trace:\n", loglvl); 2474 do { 2475 struct sparc_stackf *sf; 2476 struct pt_regs *regs; 2477 unsigned long pc; 2478 2479 if (!kstack_valid(tp, fp)) 2480 break; 2481 sf = (struct sparc_stackf *) fp; 2482 regs = (struct pt_regs *) (sf + 1); 2483 2484 if (kstack_is_trap_frame(tp, regs)) { 2485 if (!(regs->tstate & TSTATE_PRIV)) 2486 break; 2487 pc = regs->tpc; 2488 fp = regs->u_regs[UREG_I6] + STACK_BIAS; 2489 } else { 2490 pc = sf->callers_pc; 2491 fp = (unsigned long)sf->fp + STACK_BIAS; 2492 } 2493 2494 print_ip_sym(loglvl, pc); 2495 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 2496 if ((pc + 8UL) == (unsigned long) &return_to_handler) { 2497 struct ftrace_ret_stack *ret_stack; 2498 ret_stack = ftrace_graph_get_ret_stack(tsk, graph); 2499 if (ret_stack) { 2500 pc = ret_stack->ret; 2501 print_ip_sym(loglvl, pc); 2502 graph++; 2503 } 2504 } 2505 #endif 2506 } while (++count < 16); 2507 } 2508 kernel_stack_up(struct reg_window * rw)2509 static inline struct reg_window *kernel_stack_up(struct reg_window *rw) 2510 { 2511 unsigned long fp = rw->ins[6]; 2512 2513 if (!fp) 2514 return NULL; 2515 2516 return (struct reg_window *) (fp + STACK_BIAS); 2517 } 2518 die_if_kernel(char * str,struct pt_regs * regs)2519 void __noreturn die_if_kernel(char *str, struct pt_regs *regs) 2520 { 2521 static int die_counter; 2522 int count = 0; 2523 2524 /* Amuse the user. */ 2525 printk( 2526 " \\|/ ____ \\|/\n" 2527 " \"@'/ .. \\`@\"\n" 2528 " /_| \\__/ |_\\\n" 2529 " \\__U_/\n"); 2530 2531 printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter); 2532 notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV); 2533 __asm__ __volatile__("flushw"); 2534 show_regs(regs); 2535 add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); 2536 if (regs->tstate & TSTATE_PRIV) { 2537 struct thread_info *tp = current_thread_info(); 2538 struct reg_window *rw = (struct reg_window *) 2539 (regs->u_regs[UREG_FP] + STACK_BIAS); 2540 2541 /* Stop the back trace when we hit userland or we 2542 * find some badly aligned kernel stack. 2543 */ 2544 while (rw && 2545 count++ < 30 && 2546 kstack_valid(tp, (unsigned long) rw)) { 2547 printk("Caller[%016lx]: %pS\n", rw->ins[7], 2548 (void *) rw->ins[7]); 2549 2550 rw = kernel_stack_up(rw); 2551 } 2552 instruction_dump ((unsigned int *) regs->tpc); 2553 } else { 2554 if (test_thread_flag(TIF_32BIT)) { 2555 regs->tpc &= 0xffffffff; 2556 regs->tnpc &= 0xffffffff; 2557 } 2558 user_instruction_dump ((unsigned int __user *) regs->tpc); 2559 } 2560 if (panic_on_oops) 2561 panic("Fatal exception"); 2562 make_task_dead((regs->tstate & TSTATE_PRIV)? SIGKILL : SIGSEGV); 2563 } 2564 EXPORT_SYMBOL(die_if_kernel); 2565 2566 #define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19)) 2567 #define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19)) 2568 do_illegal_instruction(struct pt_regs * regs)2569 void do_illegal_instruction(struct pt_regs *regs) 2570 { 2571 enum ctx_state prev_state = exception_enter(); 2572 unsigned long pc = regs->tpc; 2573 unsigned long tstate = regs->tstate; 2574 u32 insn; 2575 2576 if (notify_die(DIE_TRAP, "illegal instruction", regs, 2577 0, 0x10, SIGILL) == NOTIFY_STOP) 2578 goto out; 2579 2580 if (tstate & TSTATE_PRIV) 2581 die_if_kernel("Kernel illegal instruction", regs); 2582 if (test_thread_flag(TIF_32BIT)) 2583 pc = (u32)pc; 2584 if (get_user(insn, (u32 __user *) pc) != -EFAULT) { 2585 if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ { 2586 if (handle_popc(insn, regs)) 2587 goto out; 2588 } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ { 2589 if (handle_ldf_stq(insn, regs)) 2590 goto out; 2591 } else if (tlb_type == hypervisor) { 2592 if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) { 2593 if (!vis_emul(regs, insn)) 2594 goto out; 2595 } else { 2596 struct fpustate *f = FPUSTATE; 2597 2598 /* On UltraSPARC T2 and later, FPU insns which 2599 * are not implemented in HW signal an illegal 2600 * instruction trap and do not set the FP Trap 2601 * Trap in the %fsr to unimplemented_FPop. 2602 */ 2603 if (do_mathemu(regs, f, true)) 2604 goto out; 2605 } 2606 } 2607 } 2608 force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc); 2609 out: 2610 exception_exit(prev_state); 2611 } 2612 mem_address_unaligned(struct pt_regs * regs,unsigned long sfar,unsigned long sfsr)2613 void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr) 2614 { 2615 enum ctx_state prev_state = exception_enter(); 2616 2617 if (notify_die(DIE_TRAP, "memory address unaligned", regs, 2618 0, 0x34, SIGSEGV) == NOTIFY_STOP) 2619 goto out; 2620 2621 if (regs->tstate & TSTATE_PRIV) { 2622 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc)); 2623 goto out; 2624 } 2625 if (is_no_fault_exception(regs)) 2626 return; 2627 2628 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar); 2629 out: 2630 exception_exit(prev_state); 2631 } 2632 sun4v_do_mna(struct pt_regs * regs,unsigned long addr,unsigned long type_ctx)2633 void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) 2634 { 2635 if (notify_die(DIE_TRAP, "memory address unaligned", regs, 2636 0, 0x34, SIGSEGV) == NOTIFY_STOP) 2637 return; 2638 2639 if (regs->tstate & TSTATE_PRIV) { 2640 kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc)); 2641 return; 2642 } 2643 if (is_no_fault_exception(regs)) 2644 return; 2645 2646 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr); 2647 } 2648 2649 /* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI 2650 * tag mismatch. 2651 * 2652 * ADI version tag mismatch on a load from memory always results in a 2653 * precise exception. Tag mismatch on a store to memory will result in 2654 * precise exception if MCDPER or PMCDPER is set to 1. 2655 */ sun4v_mem_corrupt_detect_precise(struct pt_regs * regs,unsigned long addr,unsigned long context)2656 void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr, 2657 unsigned long context) 2658 { 2659 if (notify_die(DIE_TRAP, "memory corruption precise exception", regs, 2660 0, 0x8, SIGSEGV) == NOTIFY_STOP) 2661 return; 2662 2663 if (regs->tstate & TSTATE_PRIV) { 2664 /* MCD exception could happen because the task was running 2665 * a system call with MCD enabled and passed a non-versioned 2666 * pointer or pointer with bad version tag to the system 2667 * call. 2668 */ 2669 const struct exception_table_entry *entry; 2670 2671 entry = search_exception_tables(regs->tpc); 2672 if (entry) { 2673 /* Looks like a bad syscall parameter */ 2674 #ifdef DEBUG_EXCEPTIONS 2675 pr_emerg("Exception: PC<%016lx> faddr<UNKNOWN>\n", 2676 regs->tpc); 2677 pr_emerg("EX_TABLE: insn<%016lx> fixup<%016lx>\n", 2678 regs->tpc, entry->fixup); 2679 #endif 2680 regs->tpc = entry->fixup; 2681 regs->tnpc = regs->tpc + 4; 2682 return; 2683 } 2684 pr_emerg("%s: ADDR[%016lx] CTX[%lx], going.\n", 2685 __func__, addr, context); 2686 die_if_kernel("MCD precise", regs); 2687 } 2688 2689 if (test_thread_flag(TIF_32BIT)) { 2690 regs->tpc &= 0xffffffff; 2691 regs->tnpc &= 0xffffffff; 2692 } 2693 force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr); 2694 } 2695 do_privop(struct pt_regs * regs)2696 void do_privop(struct pt_regs *regs) 2697 { 2698 enum ctx_state prev_state = exception_enter(); 2699 2700 if (notify_die(DIE_TRAP, "privileged operation", regs, 2701 0, 0x11, SIGILL) == NOTIFY_STOP) 2702 goto out; 2703 2704 if (test_thread_flag(TIF_32BIT)) { 2705 regs->tpc &= 0xffffffff; 2706 regs->tnpc &= 0xffffffff; 2707 } 2708 force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc); 2709 out: 2710 exception_exit(prev_state); 2711 } 2712 do_privact(struct pt_regs * regs)2713 void do_privact(struct pt_regs *regs) 2714 { 2715 do_privop(regs); 2716 } 2717 2718 /* Trap level 1 stuff or other traps we should never see... */ do_cee(struct pt_regs * regs)2719 void do_cee(struct pt_regs *regs) 2720 { 2721 exception_enter(); 2722 die_if_kernel("TL0: Cache Error Exception", regs); 2723 } 2724 do_div0_tl1(struct pt_regs * regs)2725 void do_div0_tl1(struct pt_regs *regs) 2726 { 2727 exception_enter(); 2728 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2729 die_if_kernel("TL1: DIV0 Exception", regs); 2730 } 2731 do_fpieee_tl1(struct pt_regs * regs)2732 void do_fpieee_tl1(struct pt_regs *regs) 2733 { 2734 exception_enter(); 2735 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2736 die_if_kernel("TL1: FPU IEEE Exception", regs); 2737 } 2738 do_fpother_tl1(struct pt_regs * regs)2739 void do_fpother_tl1(struct pt_regs *regs) 2740 { 2741 exception_enter(); 2742 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2743 die_if_kernel("TL1: FPU Other Exception", regs); 2744 } 2745 do_ill_tl1(struct pt_regs * regs)2746 void do_ill_tl1(struct pt_regs *regs) 2747 { 2748 exception_enter(); 2749 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2750 die_if_kernel("TL1: Illegal Instruction Exception", regs); 2751 } 2752 do_irq_tl1(struct pt_regs * regs)2753 void do_irq_tl1(struct pt_regs *regs) 2754 { 2755 exception_enter(); 2756 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2757 die_if_kernel("TL1: IRQ Exception", regs); 2758 } 2759 do_lddfmna_tl1(struct pt_regs * regs)2760 void do_lddfmna_tl1(struct pt_regs *regs) 2761 { 2762 exception_enter(); 2763 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2764 die_if_kernel("TL1: LDDF Exception", regs); 2765 } 2766 do_stdfmna_tl1(struct pt_regs * regs)2767 void do_stdfmna_tl1(struct pt_regs *regs) 2768 { 2769 exception_enter(); 2770 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2771 die_if_kernel("TL1: STDF Exception", regs); 2772 } 2773 do_paw(struct pt_regs * regs)2774 void do_paw(struct pt_regs *regs) 2775 { 2776 exception_enter(); 2777 die_if_kernel("TL0: Phys Watchpoint Exception", regs); 2778 } 2779 do_paw_tl1(struct pt_regs * regs)2780 void do_paw_tl1(struct pt_regs *regs) 2781 { 2782 exception_enter(); 2783 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2784 die_if_kernel("TL1: Phys Watchpoint Exception", regs); 2785 } 2786 do_vaw(struct pt_regs * regs)2787 void do_vaw(struct pt_regs *regs) 2788 { 2789 exception_enter(); 2790 die_if_kernel("TL0: Virt Watchpoint Exception", regs); 2791 } 2792 do_vaw_tl1(struct pt_regs * regs)2793 void do_vaw_tl1(struct pt_regs *regs) 2794 { 2795 exception_enter(); 2796 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2797 die_if_kernel("TL1: Virt Watchpoint Exception", regs); 2798 } 2799 do_tof_tl1(struct pt_regs * regs)2800 void do_tof_tl1(struct pt_regs *regs) 2801 { 2802 exception_enter(); 2803 dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); 2804 die_if_kernel("TL1: Tag Overflow Exception", regs); 2805 } 2806 do_getpsr(struct pt_regs * regs)2807 void do_getpsr(struct pt_regs *regs) 2808 { 2809 regs->u_regs[UREG_I0] = tstate_to_psr(regs->tstate); 2810 regs->tpc = regs->tnpc; 2811 regs->tnpc += 4; 2812 if (test_thread_flag(TIF_32BIT)) { 2813 regs->tpc &= 0xffffffff; 2814 regs->tnpc &= 0xffffffff; 2815 } 2816 } 2817 2818 u64 cpu_mondo_counter[NR_CPUS] = {0}; 2819 struct trap_per_cpu trap_block[NR_CPUS]; 2820 EXPORT_SYMBOL(trap_block); 2821 2822 /* This can get invoked before sched_init() so play it super safe 2823 * and use hard_smp_processor_id(). 2824 */ init_cur_cpu_trap(struct thread_info * t)2825 void notrace init_cur_cpu_trap(struct thread_info *t) 2826 { 2827 int cpu = hard_smp_processor_id(); 2828 struct trap_per_cpu *p = &trap_block[cpu]; 2829 2830 p->thread = t; 2831 p->pgd_paddr = 0; 2832 } 2833 2834 extern void thread_info_offsets_are_bolixed_dave(void); 2835 extern void trap_per_cpu_offsets_are_bolixed_dave(void); 2836 extern void tsb_config_offsets_are_bolixed_dave(void); 2837 2838 /* Only invoked on boot processor. */ trap_init(void)2839 void __init trap_init(void) 2840 { 2841 /* Compile time sanity check. */ 2842 BUILD_BUG_ON(TI_TASK != offsetof(struct thread_info, task) || 2843 TI_FLAGS != offsetof(struct thread_info, flags) || 2844 TI_CPU != offsetof(struct thread_info, cpu) || 2845 TI_FPSAVED != offsetof(struct thread_info, fpsaved) || 2846 TI_KSP != offsetof(struct thread_info, ksp) || 2847 TI_FAULT_ADDR != offsetof(struct thread_info, 2848 fault_address) || 2849 TI_KREGS != offsetof(struct thread_info, kregs) || 2850 TI_UTRAPS != offsetof(struct thread_info, utraps) || 2851 TI_REG_WINDOW != offsetof(struct thread_info, 2852 reg_window) || 2853 TI_RWIN_SPTRS != offsetof(struct thread_info, 2854 rwbuf_stkptrs) || 2855 TI_GSR != offsetof(struct thread_info, gsr) || 2856 TI_XFSR != offsetof(struct thread_info, xfsr) || 2857 TI_PRE_COUNT != offsetof(struct thread_info, 2858 preempt_count) || 2859 TI_NEW_CHILD != offsetof(struct thread_info, new_child) || 2860 TI_KUNA_REGS != offsetof(struct thread_info, 2861 kern_una_regs) || 2862 TI_KUNA_INSN != offsetof(struct thread_info, 2863 kern_una_insn) || 2864 TI_FPREGS != offsetof(struct thread_info, fpregs) || 2865 (TI_FPREGS & (64 - 1))); 2866 2867 BUILD_BUG_ON(TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, 2868 thread) || 2869 (TRAP_PER_CPU_PGD_PADDR != 2870 offsetof(struct trap_per_cpu, pgd_paddr)) || 2871 (TRAP_PER_CPU_CPU_MONDO_PA != 2872 offsetof(struct trap_per_cpu, cpu_mondo_pa)) || 2873 (TRAP_PER_CPU_DEV_MONDO_PA != 2874 offsetof(struct trap_per_cpu, dev_mondo_pa)) || 2875 (TRAP_PER_CPU_RESUM_MONDO_PA != 2876 offsetof(struct trap_per_cpu, resum_mondo_pa)) || 2877 (TRAP_PER_CPU_RESUM_KBUF_PA != 2878 offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) || 2879 (TRAP_PER_CPU_NONRESUM_MONDO_PA != 2880 offsetof(struct trap_per_cpu, nonresum_mondo_pa)) || 2881 (TRAP_PER_CPU_NONRESUM_KBUF_PA != 2882 offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) || 2883 (TRAP_PER_CPU_FAULT_INFO != 2884 offsetof(struct trap_per_cpu, fault_info)) || 2885 (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA != 2886 offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) || 2887 (TRAP_PER_CPU_CPU_LIST_PA != 2888 offsetof(struct trap_per_cpu, cpu_list_pa)) || 2889 (TRAP_PER_CPU_TSB_HUGE != 2890 offsetof(struct trap_per_cpu, tsb_huge)) || 2891 (TRAP_PER_CPU_TSB_HUGE_TEMP != 2892 offsetof(struct trap_per_cpu, tsb_huge_temp)) || 2893 (TRAP_PER_CPU_IRQ_WORKLIST_PA != 2894 offsetof(struct trap_per_cpu, irq_worklist_pa)) || 2895 (TRAP_PER_CPU_CPU_MONDO_QMASK != 2896 offsetof(struct trap_per_cpu, cpu_mondo_qmask)) || 2897 (TRAP_PER_CPU_DEV_MONDO_QMASK != 2898 offsetof(struct trap_per_cpu, dev_mondo_qmask)) || 2899 (TRAP_PER_CPU_RESUM_QMASK != 2900 offsetof(struct trap_per_cpu, resum_qmask)) || 2901 (TRAP_PER_CPU_NONRESUM_QMASK != 2902 offsetof(struct trap_per_cpu, nonresum_qmask)) || 2903 (TRAP_PER_CPU_PER_CPU_BASE != 2904 offsetof(struct trap_per_cpu, __per_cpu_base))); 2905 2906 BUILD_BUG_ON((TSB_CONFIG_TSB != 2907 offsetof(struct tsb_config, tsb)) || 2908 (TSB_CONFIG_RSS_LIMIT != 2909 offsetof(struct tsb_config, tsb_rss_limit)) || 2910 (TSB_CONFIG_NENTRIES != 2911 offsetof(struct tsb_config, tsb_nentries)) || 2912 (TSB_CONFIG_REG_VAL != 2913 offsetof(struct tsb_config, tsb_reg_val)) || 2914 (TSB_CONFIG_MAP_VADDR != 2915 offsetof(struct tsb_config, tsb_map_vaddr)) || 2916 (TSB_CONFIG_MAP_PTE != 2917 offsetof(struct tsb_config, tsb_map_pte))); 2918 2919 /* Attach to the address space of init_task. On SMP we 2920 * do this in smp.c:smp_callin for other cpus. 2921 */ 2922 mmgrab(&init_mm); 2923 current->active_mm = &init_mm; 2924 } 2925