1 /* 2 * S/390 helpers 3 * 4 * Copyright (c) 2009 Ulrich Hecht 5 * Copyright (c) 2011 Alexander Graf 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "cpu.h" 23 #include "internal.h" 24 #include "exec/gdbstub.h" 25 #include "qemu/timer.h" 26 #include "qemu/qemu-print.h" 27 #include "hw/s390x/ioinst.h" 28 #include "hw/s390x/pv.h" 29 #include "sysemu/hw_accel.h" 30 #include "sysemu/runstate.h" 31 #ifndef CONFIG_USER_ONLY 32 #include "sysemu/tcg.h" 33 #endif 34 35 #ifndef CONFIG_USER_ONLY 36 void s390x_tod_timer(void *opaque) 37 { 38 cpu_inject_clock_comparator((S390CPU *) opaque); 39 } 40 41 void s390x_cpu_timer(void *opaque) 42 { 43 cpu_inject_cpu_timer((S390CPU *) opaque); 44 } 45 46 hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr) 47 { 48 S390CPU *cpu = S390_CPU(cs); 49 CPUS390XState *env = &cpu->env; 50 target_ulong raddr; 51 int prot; 52 uint64_t asc = env->psw.mask & PSW_MASK_ASC; 53 uint64_t tec; 54 55 /* 31-Bit mode */ 56 if (!(env->psw.mask & PSW_MASK_64)) { 57 vaddr &= 0x7fffffff; 58 } 59 60 /* We want to read the code (e.g., see what we are single-stepping).*/ 61 if (asc != PSW_ASC_HOME) { 62 asc = PSW_ASC_PRIMARY; 63 } 64 65 /* 66 * We want to read code even if IEP is active. Use MMU_DATA_LOAD instead 67 * of MMU_INST_FETCH. 68 */ 69 if (mmu_translate(env, vaddr, MMU_DATA_LOAD, asc, &raddr, &prot, &tec)) { 70 return -1; 71 } 72 return raddr; 73 } 74 75 hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr) 76 { 77 hwaddr phys_addr; 78 target_ulong page; 79 80 page = vaddr & TARGET_PAGE_MASK; 81 phys_addr = cpu_get_phys_page_debug(cs, page); 82 phys_addr += (vaddr & ~TARGET_PAGE_MASK); 83 84 return phys_addr; 85 } 86 87 static inline bool is_special_wait_psw(uint64_t psw_addr) 88 { 89 /* signal quiesce */ 90 return (psw_addr & 0xfffUL) == 0xfffUL; 91 } 92 93 void s390_handle_wait(S390CPU *cpu) 94 { 95 CPUState *cs = CPU(cpu); 96 97 if (s390_cpu_halt(cpu) == 0) { 98 if (is_special_wait_psw(cpu->env.psw.addr)) { 99 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 100 } else { 101 cpu->env.crash_reason = S390_CRASH_REASON_DISABLED_WAIT; 102 qemu_system_guest_panicked(cpu_get_crash_info(cs)); 103 } 104 } 105 } 106 107 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr) 108 { 109 uint64_t old_mask = env->psw.mask; 110 111 env->psw.addr = addr; 112 env->psw.mask = mask; 113 114 /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */ 115 if (!tcg_enabled()) { 116 return; 117 } 118 env->cc_op = (mask >> 44) & 3; 119 120 if ((old_mask ^ mask) & PSW_MASK_PER) { 121 s390_cpu_recompute_watchpoints(env_cpu(env)); 122 } 123 124 if (mask & PSW_MASK_WAIT) { 125 s390_handle_wait(env_archcpu(env)); 126 } 127 } 128 129 uint64_t get_psw_mask(CPUS390XState *env) 130 { 131 uint64_t r = env->psw.mask; 132 133 if (tcg_enabled()) { 134 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, 135 env->cc_vr); 136 137 r &= ~PSW_MASK_CC; 138 assert(!(env->cc_op & ~3)); 139 r |= (uint64_t)env->cc_op << 44; 140 } 141 142 return r; 143 } 144 145 LowCore *cpu_map_lowcore(CPUS390XState *env) 146 { 147 LowCore *lowcore; 148 hwaddr len = sizeof(LowCore); 149 150 lowcore = cpu_physical_memory_map(env->psa, &len, true); 151 152 if (len < sizeof(LowCore)) { 153 cpu_abort(env_cpu(env), "Could not map lowcore\n"); 154 } 155 156 return lowcore; 157 } 158 159 void cpu_unmap_lowcore(LowCore *lowcore) 160 { 161 cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore)); 162 } 163 164 void do_restart_interrupt(CPUS390XState *env) 165 { 166 uint64_t mask, addr; 167 LowCore *lowcore; 168 169 lowcore = cpu_map_lowcore(env); 170 171 lowcore->restart_old_psw.mask = cpu_to_be64(get_psw_mask(env)); 172 lowcore->restart_old_psw.addr = cpu_to_be64(env->psw.addr); 173 mask = be64_to_cpu(lowcore->restart_new_psw.mask); 174 addr = be64_to_cpu(lowcore->restart_new_psw.addr); 175 176 cpu_unmap_lowcore(lowcore); 177 env->pending_int &= ~INTERRUPT_RESTART; 178 179 load_psw(env, mask, addr); 180 } 181 182 void s390_cpu_recompute_watchpoints(CPUState *cs) 183 { 184 const int wp_flags = BP_CPU | BP_MEM_WRITE | BP_STOP_BEFORE_ACCESS; 185 S390CPU *cpu = S390_CPU(cs); 186 CPUS390XState *env = &cpu->env; 187 188 /* We are called when the watchpoints have changed. First 189 remove them all. */ 190 cpu_watchpoint_remove_all(cs, BP_CPU); 191 192 /* Return if PER is not enabled */ 193 if (!(env->psw.mask & PSW_MASK_PER)) { 194 return; 195 } 196 197 /* Return if storage-alteration event is not enabled. */ 198 if (!(env->cregs[9] & PER_CR9_EVENT_STORE)) { 199 return; 200 } 201 202 if (env->cregs[10] == 0 && env->cregs[11] == -1LL) { 203 /* We can't create a watchoint spanning the whole memory range, so 204 split it in two parts. */ 205 cpu_watchpoint_insert(cs, 0, 1ULL << 63, wp_flags, NULL); 206 cpu_watchpoint_insert(cs, 1ULL << 63, 1ULL << 63, wp_flags, NULL); 207 } else if (env->cregs[10] > env->cregs[11]) { 208 /* The address range loops, create two watchpoints. */ 209 cpu_watchpoint_insert(cs, env->cregs[10], -env->cregs[10], 210 wp_flags, NULL); 211 cpu_watchpoint_insert(cs, 0, env->cregs[11] + 1, wp_flags, NULL); 212 213 } else { 214 /* Default case, create a single watchpoint. */ 215 cpu_watchpoint_insert(cs, env->cregs[10], 216 env->cregs[11] - env->cregs[10] + 1, 217 wp_flags, NULL); 218 } 219 } 220 221 typedef struct SigpSaveArea { 222 uint64_t fprs[16]; /* 0x0000 */ 223 uint64_t grs[16]; /* 0x0080 */ 224 PSW psw; /* 0x0100 */ 225 uint8_t pad_0x0110[0x0118 - 0x0110]; /* 0x0110 */ 226 uint32_t prefix; /* 0x0118 */ 227 uint32_t fpc; /* 0x011c */ 228 uint8_t pad_0x0120[0x0124 - 0x0120]; /* 0x0120 */ 229 uint32_t todpr; /* 0x0124 */ 230 uint64_t cputm; /* 0x0128 */ 231 uint64_t ckc; /* 0x0130 */ 232 uint8_t pad_0x0138[0x0140 - 0x0138]; /* 0x0138 */ 233 uint32_t ars[16]; /* 0x0140 */ 234 uint64_t crs[16]; /* 0x0384 */ 235 } SigpSaveArea; 236 QEMU_BUILD_BUG_ON(sizeof(SigpSaveArea) != 512); 237 238 int s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch) 239 { 240 static const uint8_t ar_id = 1; 241 SigpSaveArea *sa; 242 hwaddr len = sizeof(*sa); 243 int i; 244 245 /* For PVMs storing will occur when this cpu enters SIE again */ 246 if (s390_is_pv()) { 247 return 0; 248 } 249 250 sa = cpu_physical_memory_map(addr, &len, true); 251 if (!sa) { 252 return -EFAULT; 253 } 254 if (len != sizeof(*sa)) { 255 cpu_physical_memory_unmap(sa, len, 1, 0); 256 return -EFAULT; 257 } 258 259 if (store_arch) { 260 cpu_physical_memory_write(offsetof(LowCore, ar_access_id), &ar_id, 1); 261 } 262 for (i = 0; i < 16; ++i) { 263 sa->fprs[i] = cpu_to_be64(*get_freg(&cpu->env, i)); 264 } 265 for (i = 0; i < 16; ++i) { 266 sa->grs[i] = cpu_to_be64(cpu->env.regs[i]); 267 } 268 sa->psw.addr = cpu_to_be64(cpu->env.psw.addr); 269 sa->psw.mask = cpu_to_be64(get_psw_mask(&cpu->env)); 270 sa->prefix = cpu_to_be32(cpu->env.psa); 271 sa->fpc = cpu_to_be32(cpu->env.fpc); 272 sa->todpr = cpu_to_be32(cpu->env.todpr); 273 sa->cputm = cpu_to_be64(cpu->env.cputm); 274 sa->ckc = cpu_to_be64(cpu->env.ckc >> 8); 275 for (i = 0; i < 16; ++i) { 276 sa->ars[i] = cpu_to_be32(cpu->env.aregs[i]); 277 } 278 for (i = 0; i < 16; ++i) { 279 sa->crs[i] = cpu_to_be64(cpu->env.cregs[i]); 280 } 281 282 cpu_physical_memory_unmap(sa, len, 1, len); 283 284 return 0; 285 } 286 287 typedef struct SigpAdtlSaveArea { 288 uint64_t vregs[32][2]; /* 0x0000 */ 289 uint8_t pad_0x0200[0x0400 - 0x0200]; /* 0x0200 */ 290 uint64_t gscb[4]; /* 0x0400 */ 291 uint8_t pad_0x0420[0x1000 - 0x0420]; /* 0x0420 */ 292 } SigpAdtlSaveArea; 293 QEMU_BUILD_BUG_ON(sizeof(SigpAdtlSaveArea) != 4096); 294 295 #define ADTL_GS_MIN_SIZE 2048 /* minimal size of adtl save area for GS */ 296 int s390_store_adtl_status(S390CPU *cpu, hwaddr addr, hwaddr len) 297 { 298 SigpAdtlSaveArea *sa; 299 hwaddr save = len; 300 int i; 301 302 sa = cpu_physical_memory_map(addr, &save, true); 303 if (!sa) { 304 return -EFAULT; 305 } 306 if (save != len) { 307 cpu_physical_memory_unmap(sa, len, 1, 0); 308 return -EFAULT; 309 } 310 311 if (s390_has_feat(S390_FEAT_VECTOR)) { 312 for (i = 0; i < 32; i++) { 313 sa->vregs[i][0] = cpu_to_be64(cpu->env.vregs[i][0]); 314 sa->vregs[i][1] = cpu_to_be64(cpu->env.vregs[i][1]); 315 } 316 } 317 if (s390_has_feat(S390_FEAT_GUARDED_STORAGE) && len >= ADTL_GS_MIN_SIZE) { 318 for (i = 0; i < 4; i++) { 319 sa->gscb[i] = cpu_to_be64(cpu->env.gscb[i]); 320 } 321 } 322 323 cpu_physical_memory_unmap(sa, len, 1, len); 324 return 0; 325 } 326 #endif /* CONFIG_USER_ONLY */ 327 328 void s390_cpu_dump_state(CPUState *cs, FILE *f, int flags) 329 { 330 S390CPU *cpu = S390_CPU(cs); 331 CPUS390XState *env = &cpu->env; 332 int i; 333 334 if (env->cc_op > 3) { 335 qemu_fprintf(f, "PSW=mask %016" PRIx64 " addr %016" PRIx64 " cc %15s\n", 336 env->psw.mask, env->psw.addr, cc_name(env->cc_op)); 337 } else { 338 qemu_fprintf(f, "PSW=mask %016" PRIx64 " addr %016" PRIx64 " cc %02x\n", 339 env->psw.mask, env->psw.addr, env->cc_op); 340 } 341 342 for (i = 0; i < 16; i++) { 343 qemu_fprintf(f, "R%02d=%016" PRIx64, i, env->regs[i]); 344 if ((i % 4) == 3) { 345 qemu_fprintf(f, "\n"); 346 } else { 347 qemu_fprintf(f, " "); 348 } 349 } 350 351 if (flags & CPU_DUMP_FPU) { 352 if (s390_has_feat(S390_FEAT_VECTOR)) { 353 for (i = 0; i < 32; i++) { 354 qemu_fprintf(f, "V%02d=%016" PRIx64 "%016" PRIx64 "%c", 355 i, env->vregs[i][0], env->vregs[i][1], 356 i % 2 ? '\n' : ' '); 357 } 358 } else { 359 for (i = 0; i < 16; i++) { 360 qemu_fprintf(f, "F%02d=%016" PRIx64 "%c", 361 i, *get_freg(env, i), 362 (i % 4) == 3 ? '\n' : ' '); 363 } 364 } 365 } 366 367 #ifndef CONFIG_USER_ONLY 368 for (i = 0; i < 16; i++) { 369 qemu_fprintf(f, "C%02d=%016" PRIx64, i, env->cregs[i]); 370 if ((i % 4) == 3) { 371 qemu_fprintf(f, "\n"); 372 } else { 373 qemu_fprintf(f, " "); 374 } 375 } 376 #endif 377 378 #ifdef DEBUG_INLINE_BRANCHES 379 for (i = 0; i < CC_OP_MAX; i++) { 380 qemu_fprintf(f, " %15s = %10ld\t%10ld\n", cc_name(i), 381 inline_branch_miss[i], inline_branch_hit[i]); 382 } 383 #endif 384 385 qemu_fprintf(f, "\n"); 386 } 387 388 const char *cc_name(enum cc_op cc_op) 389 { 390 static const char * const cc_names[] = { 391 [CC_OP_CONST0] = "CC_OP_CONST0", 392 [CC_OP_CONST1] = "CC_OP_CONST1", 393 [CC_OP_CONST2] = "CC_OP_CONST2", 394 [CC_OP_CONST3] = "CC_OP_CONST3", 395 [CC_OP_DYNAMIC] = "CC_OP_DYNAMIC", 396 [CC_OP_STATIC] = "CC_OP_STATIC", 397 [CC_OP_NZ] = "CC_OP_NZ", 398 [CC_OP_LTGT_32] = "CC_OP_LTGT_32", 399 [CC_OP_LTGT_64] = "CC_OP_LTGT_64", 400 [CC_OP_LTUGTU_32] = "CC_OP_LTUGTU_32", 401 [CC_OP_LTUGTU_64] = "CC_OP_LTUGTU_64", 402 [CC_OP_LTGT0_32] = "CC_OP_LTGT0_32", 403 [CC_OP_LTGT0_64] = "CC_OP_LTGT0_64", 404 [CC_OP_ADD_64] = "CC_OP_ADD_64", 405 [CC_OP_ADDU_64] = "CC_OP_ADDU_64", 406 [CC_OP_ADDC_64] = "CC_OP_ADDC_64", 407 [CC_OP_SUB_64] = "CC_OP_SUB_64", 408 [CC_OP_SUBU_64] = "CC_OP_SUBU_64", 409 [CC_OP_SUBB_64] = "CC_OP_SUBB_64", 410 [CC_OP_ABS_64] = "CC_OP_ABS_64", 411 [CC_OP_NABS_64] = "CC_OP_NABS_64", 412 [CC_OP_ADD_32] = "CC_OP_ADD_32", 413 [CC_OP_ADDU_32] = "CC_OP_ADDU_32", 414 [CC_OP_ADDC_32] = "CC_OP_ADDC_32", 415 [CC_OP_SUB_32] = "CC_OP_SUB_32", 416 [CC_OP_SUBU_32] = "CC_OP_SUBU_32", 417 [CC_OP_SUBB_32] = "CC_OP_SUBB_32", 418 [CC_OP_ABS_32] = "CC_OP_ABS_32", 419 [CC_OP_NABS_32] = "CC_OP_NABS_32", 420 [CC_OP_COMP_32] = "CC_OP_COMP_32", 421 [CC_OP_COMP_64] = "CC_OP_COMP_64", 422 [CC_OP_TM_32] = "CC_OP_TM_32", 423 [CC_OP_TM_64] = "CC_OP_TM_64", 424 [CC_OP_NZ_F32] = "CC_OP_NZ_F32", 425 [CC_OP_NZ_F64] = "CC_OP_NZ_F64", 426 [CC_OP_NZ_F128] = "CC_OP_NZ_F128", 427 [CC_OP_ICM] = "CC_OP_ICM", 428 [CC_OP_SLA_32] = "CC_OP_SLA_32", 429 [CC_OP_SLA_64] = "CC_OP_SLA_64", 430 [CC_OP_FLOGR] = "CC_OP_FLOGR", 431 [CC_OP_LCBB] = "CC_OP_LCBB", 432 [CC_OP_VC] = "CC_OP_VC", 433 }; 434 435 return cc_names[cc_op]; 436 } 437