1 /* 2 * S/390 helpers - sysemu only 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 "s390x-internal.h" 24 #include "exec/gdbstub.h" 25 #include "qemu/timer.h" 26 #include "hw/s390x/ioinst.h" 27 #include "hw/s390x/pv.h" 28 #include "sysemu/hw_accel.h" 29 #include "sysemu/runstate.h" 30 #include "sysemu/tcg.h" 31 32 void s390x_tod_timer(void *opaque) 33 { 34 cpu_inject_clock_comparator((S390CPU *) opaque); 35 } 36 37 void s390x_cpu_timer(void *opaque) 38 { 39 cpu_inject_cpu_timer((S390CPU *) opaque); 40 } 41 42 hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr) 43 { 44 S390CPU *cpu = S390_CPU(cs); 45 CPUS390XState *env = &cpu->env; 46 target_ulong raddr; 47 int prot; 48 uint64_t asc = env->psw.mask & PSW_MASK_ASC; 49 uint64_t tec; 50 51 /* 31-Bit mode */ 52 if (!(env->psw.mask & PSW_MASK_64)) { 53 vaddr &= 0x7fffffff; 54 } 55 56 /* We want to read the code (e.g., see what we are single-stepping).*/ 57 if (asc != PSW_ASC_HOME) { 58 asc = PSW_ASC_PRIMARY; 59 } 60 61 /* 62 * We want to read code even if IEP is active. Use MMU_DATA_LOAD instead 63 * of MMU_INST_FETCH. 64 */ 65 if (mmu_translate(env, vaddr, MMU_DATA_LOAD, asc, &raddr, &prot, &tec)) { 66 return -1; 67 } 68 return raddr; 69 } 70 71 hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr) 72 { 73 hwaddr phys_addr; 74 target_ulong page; 75 76 page = vaddr & TARGET_PAGE_MASK; 77 phys_addr = cpu_get_phys_page_debug(cs, page); 78 phys_addr += (vaddr & ~TARGET_PAGE_MASK); 79 80 return phys_addr; 81 } 82 83 static inline bool is_special_wait_psw(uint64_t psw_addr) 84 { 85 /* signal quiesce */ 86 return (psw_addr & 0xfffUL) == 0xfffUL; 87 } 88 89 void s390_handle_wait(S390CPU *cpu) 90 { 91 CPUState *cs = CPU(cpu); 92 93 if (s390_cpu_halt(cpu) == 0) { 94 if (is_special_wait_psw(cpu->env.psw.addr)) { 95 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 96 } else { 97 cpu->env.crash_reason = S390_CRASH_REASON_DISABLED_WAIT; 98 qemu_system_guest_panicked(cpu_get_crash_info(cs)); 99 } 100 } 101 } 102 103 LowCore *cpu_map_lowcore(CPUS390XState *env) 104 { 105 LowCore *lowcore; 106 hwaddr len = sizeof(LowCore); 107 108 lowcore = cpu_physical_memory_map(env->psa, &len, true); 109 110 if (len < sizeof(LowCore)) { 111 cpu_abort(env_cpu(env), "Could not map lowcore\n"); 112 } 113 114 return lowcore; 115 } 116 117 void cpu_unmap_lowcore(LowCore *lowcore) 118 { 119 cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore)); 120 } 121 122 void do_restart_interrupt(CPUS390XState *env) 123 { 124 uint64_t mask, addr; 125 LowCore *lowcore; 126 127 lowcore = cpu_map_lowcore(env); 128 129 lowcore->restart_old_psw.mask = cpu_to_be64(s390_cpu_get_psw_mask(env)); 130 lowcore->restart_old_psw.addr = cpu_to_be64(env->psw.addr); 131 mask = be64_to_cpu(lowcore->restart_new_psw.mask); 132 addr = be64_to_cpu(lowcore->restart_new_psw.addr); 133 134 cpu_unmap_lowcore(lowcore); 135 env->pending_int &= ~INTERRUPT_RESTART; 136 137 s390_cpu_set_psw(env, mask, addr); 138 } 139 140 void s390_cpu_recompute_watchpoints(CPUState *cs) 141 { 142 const int wp_flags = BP_CPU | BP_MEM_WRITE | BP_STOP_BEFORE_ACCESS; 143 S390CPU *cpu = S390_CPU(cs); 144 CPUS390XState *env = &cpu->env; 145 146 /* We are called when the watchpoints have changed. First 147 remove them all. */ 148 cpu_watchpoint_remove_all(cs, BP_CPU); 149 150 /* Return if PER is not enabled */ 151 if (!(env->psw.mask & PSW_MASK_PER)) { 152 return; 153 } 154 155 /* Return if storage-alteration event is not enabled. */ 156 if (!(env->cregs[9] & PER_CR9_EVENT_STORE)) { 157 return; 158 } 159 160 if (env->cregs[10] == 0 && env->cregs[11] == -1LL) { 161 /* We can't create a watchoint spanning the whole memory range, so 162 split it in two parts. */ 163 cpu_watchpoint_insert(cs, 0, 1ULL << 63, wp_flags, NULL); 164 cpu_watchpoint_insert(cs, 1ULL << 63, 1ULL << 63, wp_flags, NULL); 165 } else if (env->cregs[10] > env->cregs[11]) { 166 /* The address range loops, create two watchpoints. */ 167 cpu_watchpoint_insert(cs, env->cregs[10], -env->cregs[10], 168 wp_flags, NULL); 169 cpu_watchpoint_insert(cs, 0, env->cregs[11] + 1, wp_flags, NULL); 170 171 } else { 172 /* Default case, create a single watchpoint. */ 173 cpu_watchpoint_insert(cs, env->cregs[10], 174 env->cregs[11] - env->cregs[10] + 1, 175 wp_flags, NULL); 176 } 177 } 178 179 typedef struct SigpSaveArea { 180 uint64_t fprs[16]; /* 0x0000 */ 181 uint64_t grs[16]; /* 0x0080 */ 182 PSW psw; /* 0x0100 */ 183 uint8_t pad_0x0110[0x0118 - 0x0110]; /* 0x0110 */ 184 uint32_t prefix; /* 0x0118 */ 185 uint32_t fpc; /* 0x011c */ 186 uint8_t pad_0x0120[0x0124 - 0x0120]; /* 0x0120 */ 187 uint32_t todpr; /* 0x0124 */ 188 uint64_t cputm; /* 0x0128 */ 189 uint64_t ckc; /* 0x0130 */ 190 uint8_t pad_0x0138[0x0140 - 0x0138]; /* 0x0138 */ 191 uint32_t ars[16]; /* 0x0140 */ 192 uint64_t crs[16]; /* 0x0384 */ 193 } SigpSaveArea; 194 QEMU_BUILD_BUG_ON(sizeof(SigpSaveArea) != 512); 195 196 int s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch) 197 { 198 static const uint8_t ar_id = 1; 199 SigpSaveArea *sa; 200 hwaddr len = sizeof(*sa); 201 int i; 202 203 /* For PVMs storing will occur when this cpu enters SIE again */ 204 if (s390_is_pv()) { 205 return 0; 206 } 207 208 sa = cpu_physical_memory_map(addr, &len, true); 209 if (!sa) { 210 return -EFAULT; 211 } 212 if (len != sizeof(*sa)) { 213 cpu_physical_memory_unmap(sa, len, 1, 0); 214 return -EFAULT; 215 } 216 217 if (store_arch) { 218 cpu_physical_memory_write(offsetof(LowCore, ar_access_id), &ar_id, 1); 219 } 220 for (i = 0; i < 16; ++i) { 221 sa->fprs[i] = cpu_to_be64(*get_freg(&cpu->env, i)); 222 } 223 for (i = 0; i < 16; ++i) { 224 sa->grs[i] = cpu_to_be64(cpu->env.regs[i]); 225 } 226 sa->psw.addr = cpu_to_be64(cpu->env.psw.addr); 227 sa->psw.mask = cpu_to_be64(s390_cpu_get_psw_mask(&cpu->env)); 228 sa->prefix = cpu_to_be32(cpu->env.psa); 229 sa->fpc = cpu_to_be32(cpu->env.fpc); 230 sa->todpr = cpu_to_be32(cpu->env.todpr); 231 sa->cputm = cpu_to_be64(cpu->env.cputm); 232 sa->ckc = cpu_to_be64(cpu->env.ckc >> 8); 233 for (i = 0; i < 16; ++i) { 234 sa->ars[i] = cpu_to_be32(cpu->env.aregs[i]); 235 } 236 for (i = 0; i < 16; ++i) { 237 sa->crs[i] = cpu_to_be64(cpu->env.cregs[i]); 238 } 239 240 cpu_physical_memory_unmap(sa, len, 1, len); 241 242 return 0; 243 } 244 245 typedef struct SigpAdtlSaveArea { 246 uint64_t vregs[32][2]; /* 0x0000 */ 247 uint8_t pad_0x0200[0x0400 - 0x0200]; /* 0x0200 */ 248 uint64_t gscb[4]; /* 0x0400 */ 249 uint8_t pad_0x0420[0x1000 - 0x0420]; /* 0x0420 */ 250 } SigpAdtlSaveArea; 251 QEMU_BUILD_BUG_ON(sizeof(SigpAdtlSaveArea) != 4096); 252 253 #define ADTL_GS_MIN_SIZE 2048 /* minimal size of adtl save area for GS */ 254 int s390_store_adtl_status(S390CPU *cpu, hwaddr addr, hwaddr len) 255 { 256 SigpAdtlSaveArea *sa; 257 hwaddr save = len; 258 int i; 259 260 sa = cpu_physical_memory_map(addr, &save, true); 261 if (!sa) { 262 return -EFAULT; 263 } 264 if (save != len) { 265 cpu_physical_memory_unmap(sa, len, 1, 0); 266 return -EFAULT; 267 } 268 269 if (s390_has_feat(S390_FEAT_VECTOR)) { 270 for (i = 0; i < 32; i++) { 271 sa->vregs[i][0] = cpu_to_be64(cpu->env.vregs[i][0]); 272 sa->vregs[i][1] = cpu_to_be64(cpu->env.vregs[i][1]); 273 } 274 } 275 if (s390_has_feat(S390_FEAT_GUARDED_STORAGE) && len >= ADTL_GS_MIN_SIZE) { 276 for (i = 0; i < 4; i++) { 277 sa->gscb[i] = cpu_to_be64(cpu->env.gscb[i]); 278 } 279 } 280 281 cpu_physical_memory_unmap(sa, len, 1, len); 282 return 0; 283 } 284