/* * S/390 misc helper routines * * Copyright (c) 2009 Ulrich Hecht * Copyright (c) 2009 Alexander Graf * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see . */ #include "qemu/osdep.h" #include "qemu/main-loop.h" #include "cpu.h" #include "internal.h" #include "exec/memory.h" #include "qemu/host-utils.h" #include "exec/helper-proto.h" #include "qemu/timer.h" #include "exec/address-spaces.h" #include "exec/exec-all.h" #include "exec/cpu_ldst.h" #if !defined(CONFIG_USER_ONLY) #include "sysemu/cpus.h" #include "sysemu/sysemu.h" #include "hw/s390x/ebcdic.h" #include "hw/s390x/s390-virtio-hcall.h" #include "hw/s390x/sclp.h" #endif /* #define DEBUG_HELPER */ #ifdef DEBUG_HELPER #define HELPER_LOG(x...) qemu_log(x) #else #define HELPER_LOG(x...) #endif /* Raise an exception statically from a TB. */ void HELPER(exception)(CPUS390XState *env, uint32_t excp) { CPUState *cs = CPU(s390_env_get_cpu(env)); HELPER_LOG("%s: exception %d\n", __func__, excp); cs->exception_index = excp; cpu_loop_exit(cs); } /* Store CPU Timer (also used for EXTRACT CPU TIME) */ uint64_t HELPER(stpt)(CPUS390XState *env) { #if defined(CONFIG_USER_ONLY) /* * Fake a descending CPU timer. We could get negative values here, * but we don't care as it is up to the OS when to process that * interrupt and reset to > 0. */ return UINT64_MAX - (uint64_t)cpu_get_host_ticks(); #else return time2tod(env->cputm - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); #endif } #ifndef CONFIG_USER_ONLY /* SCLP service call */ uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2) { qemu_mutex_lock_iothread(); int r = sclp_service_call(env, r1, r2); qemu_mutex_unlock_iothread(); if (r < 0) { s390_program_interrupt(env, -r, 4, GETPC()); } return r; } void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num) { uint64_t r; switch (num) { case 0x500: /* KVM hypercall */ qemu_mutex_lock_iothread(); r = s390_virtio_hypercall(env); qemu_mutex_unlock_iothread(); break; case 0x44: /* yield */ r = 0; break; case 0x308: /* ipl */ qemu_mutex_lock_iothread(); handle_diag_308(env, r1, r3, GETPC()); qemu_mutex_unlock_iothread(); r = 0; break; case 0x288: /* time bomb (watchdog) */ r = handle_diag_288(env, r1, r3); break; default: r = -1; break; } if (r) { s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, GETPC()); } } /* Set Prefix */ void HELPER(spx)(CPUS390XState *env, uint64_t a1) { CPUState *cs = CPU(s390_env_get_cpu(env)); uint32_t prefix = a1 & 0x7fffe000; env->psa = prefix; HELPER_LOG("prefix: %#x\n", prefix); tlb_flush_page(cs, 0); tlb_flush_page(cs, TARGET_PAGE_SIZE); } /* Store Clock */ uint64_t HELPER(stck)(CPUS390XState *env) { uint64_t time; time = env->tod_offset + time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime); return time; } /* Set Clock Comparator */ void HELPER(sckc)(CPUS390XState *env, uint64_t time) { if (time == -1ULL) { return; } env->ckc = time; /* difference between origins */ time -= env->tod_offset; /* nanoseconds */ time = tod2time(time); timer_mod(env->tod_timer, env->tod_basetime + time); } /* Set Tod Programmable Field */ void HELPER(sckpf)(CPUS390XState *env, uint64_t r0) { uint32_t val = r0; if (val & 0xffff0000) { s390_program_interrupt(env, PGM_SPECIFICATION, 2, GETPC()); } env->todpr = val; } /* Store Clock Comparator */ uint64_t HELPER(stckc)(CPUS390XState *env) { return env->ckc; } /* Set CPU Timer */ void HELPER(spt)(CPUS390XState *env, uint64_t time) { if (time == -1ULL) { return; } /* nanoseconds */ time = tod2time(time); env->cputm = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time; timer_mod(env->cpu_timer, env->cputm); } /* Store System Information */ uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0, uint64_t r0, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); int cc = 0; int sel1, sel2; if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 && ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) { /* valid function code, invalid reserved bits */ s390_program_interrupt(env, PGM_SPECIFICATION, 4, GETPC()); } sel1 = r0 & STSI_R0_SEL1_MASK; sel2 = r1 & STSI_R1_SEL2_MASK; /* XXX: spec exception if sysib is not 4k-aligned */ switch (r0 & STSI_LEVEL_MASK) { case STSI_LEVEL_1: if ((sel1 == 1) && (sel2 == 1)) { /* Basic Machine Configuration */ struct sysib_111 sysib; char type[5] = {}; memset(&sysib, 0, sizeof(sysib)); ebcdic_put(sysib.manuf, "QEMU ", 16); /* same as machine type number in STORE CPU ID, but in EBCDIC */ snprintf(type, ARRAY_SIZE(type), "%X", cpu->model->def->type); ebcdic_put(sysib.type, type, 4); /* model number (not stored in STORE CPU ID for z/Architecure) */ ebcdic_put(sysib.model, "QEMU ", 16); ebcdic_put(sysib.sequence, "QEMU ", 16); ebcdic_put(sysib.plant, "QEMU", 4); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else if ((sel1 == 2) && (sel2 == 1)) { /* Basic Machine CPU */ struct sysib_121 sysib; memset(&sysib, 0, sizeof(sysib)); /* XXX make different for different CPUs? */ ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16); ebcdic_put(sysib.plant, "QEMU", 4); stw_p(&sysib.cpu_addr, env->core_id); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else if ((sel1 == 2) && (sel2 == 2)) { /* Basic Machine CPUs */ struct sysib_122 sysib; memset(&sysib, 0, sizeof(sysib)); stl_p(&sysib.capability, 0x443afc29); /* XXX change when SMP comes */ stw_p(&sysib.total_cpus, 1); stw_p(&sysib.active_cpus, 1); stw_p(&sysib.standby_cpus, 0); stw_p(&sysib.reserved_cpus, 0); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else { cc = 3; } break; case STSI_LEVEL_2: { if ((sel1 == 2) && (sel2 == 1)) { /* LPAR CPU */ struct sysib_221 sysib; memset(&sysib, 0, sizeof(sysib)); /* XXX make different for different CPUs? */ ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16); ebcdic_put(sysib.plant, "QEMU", 4); stw_p(&sysib.cpu_addr, env->core_id); stw_p(&sysib.cpu_id, 0); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else if ((sel1 == 2) && (sel2 == 2)) { /* LPAR CPUs */ struct sysib_222 sysib; memset(&sysib, 0, sizeof(sysib)); stw_p(&sysib.lpar_num, 0); sysib.lcpuc = 0; /* XXX change when SMP comes */ stw_p(&sysib.total_cpus, 1); stw_p(&sysib.conf_cpus, 1); stw_p(&sysib.standby_cpus, 0); stw_p(&sysib.reserved_cpus, 0); ebcdic_put(sysib.name, "QEMU ", 8); stl_p(&sysib.caf, 1000); stw_p(&sysib.dedicated_cpus, 0); stw_p(&sysib.shared_cpus, 0); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else { cc = 3; } break; } case STSI_LEVEL_3: { if ((sel1 == 2) && (sel2 == 2)) { /* VM CPUs */ struct sysib_322 sysib; memset(&sysib, 0, sizeof(sysib)); sysib.count = 1; /* XXX change when SMP comes */ stw_p(&sysib.vm[0].total_cpus, 1); stw_p(&sysib.vm[0].conf_cpus, 1); stw_p(&sysib.vm[0].standby_cpus, 0); stw_p(&sysib.vm[0].reserved_cpus, 0); ebcdic_put(sysib.vm[0].name, "KVMguest", 8); stl_p(&sysib.vm[0].caf, 1000); ebcdic_put(sysib.vm[0].cpi, "KVM/Linux ", 16); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else { cc = 3; } break; } case STSI_LEVEL_CURRENT: env->regs[0] = STSI_LEVEL_3; break; default: cc = 3; break; } return cc; } uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1, uint32_t r3) { int cc; /* TODO: needed to inject interrupts - push further down */ qemu_mutex_lock_iothread(); cc = handle_sigp(env, order_code & SIGP_ORDER_MASK, r1, r3); qemu_mutex_unlock_iothread(); return cc; } #endif #ifndef CONFIG_USER_ONLY void HELPER(xsch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_xsch(cpu, r1, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(csch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_csch(cpu, r1, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(hsch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_hsch(cpu, r1, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(msch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_msch(cpu, r1, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(rchp)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_rchp(cpu, r1, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(rsch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_rsch(cpu, r1, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(sal)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_sal(cpu, r1, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(schm)(CPUS390XState *env, uint64_t r1, uint64_t r2, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_schm(cpu, r1, r2, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(ssch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_ssch(cpu, r1, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(stcrw)(CPUS390XState *env, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_stcrw(cpu, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(stsch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_stsch(cpu, r1, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(tsch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_tsch(cpu, r1, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } void HELPER(chsc)(CPUS390XState *env, uint64_t inst) { S390CPU *cpu = s390_env_get_cpu(env); qemu_mutex_lock_iothread(); ioinst_handle_chsc(cpu, inst >> 16, GETPC()); qemu_mutex_unlock_iothread(); } #endif #ifndef CONFIG_USER_ONLY void HELPER(per_check_exception)(CPUS390XState *env) { uint32_t ilen; if (env->per_perc_atmid) { /* * FIXME: ILEN_AUTO is most probably the right thing to use. ilen * always has to match the instruction referenced in the PSW. E.g. * if a PER interrupt is triggered via EXECUTE, we have to use ilen * of EXECUTE, while per_address contains the target of EXECUTE. */ ilen = get_ilen(cpu_ldub_code(env, env->per_address)); s390_program_interrupt(env, PGM_PER, ilen, GETPC()); } } /* Check if an address is within the PER starting address and the PER ending address. The address range might loop. */ static inline bool get_per_in_range(CPUS390XState *env, uint64_t addr) { if (env->cregs[10] <= env->cregs[11]) { return env->cregs[10] <= addr && addr <= env->cregs[11]; } else { return env->cregs[10] <= addr || addr <= env->cregs[11]; } } void HELPER(per_branch)(CPUS390XState *env, uint64_t from, uint64_t to) { if ((env->cregs[9] & PER_CR9_EVENT_BRANCH)) { if (!(env->cregs[9] & PER_CR9_CONTROL_BRANCH_ADDRESS) || get_per_in_range(env, to)) { env->per_address = from; env->per_perc_atmid = PER_CODE_EVENT_BRANCH | get_per_atmid(env); } } } void HELPER(per_ifetch)(CPUS390XState *env, uint64_t addr) { if ((env->cregs[9] & PER_CR9_EVENT_IFETCH) && get_per_in_range(env, addr)) { env->per_address = addr; env->per_perc_atmid = PER_CODE_EVENT_IFETCH | get_per_atmid(env); /* If the instruction has to be nullified, trigger the exception immediately. */ if (env->cregs[9] & PER_CR9_EVENT_NULLIFICATION) { CPUState *cs = CPU(s390_env_get_cpu(env)); env->per_perc_atmid |= PER_CODE_EVENT_NULLIFICATION; env->int_pgm_code = PGM_PER; env->int_pgm_ilen = get_ilen(cpu_ldub_code(env, addr)); cs->exception_index = EXCP_PGM; cpu_loop_exit(cs); } } } #endif static uint8_t stfl_bytes[2048]; static unsigned int used_stfl_bytes; static void prepare_stfl(void) { static bool initialized; int i; /* racy, but we don't care, the same values are always written */ if (initialized) { return; } s390_get_feat_block(S390_FEAT_TYPE_STFL, stfl_bytes); for (i = 0; i < sizeof(stfl_bytes); i++) { if (stfl_bytes[i]) { used_stfl_bytes = i + 1; } } initialized = true; } #ifndef CONFIG_USER_ONLY void HELPER(stfl)(CPUS390XState *env) { LowCore *lowcore; lowcore = cpu_map_lowcore(env); prepare_stfl(); memcpy(&lowcore->stfl_fac_list, stfl_bytes, sizeof(lowcore->stfl_fac_list)); cpu_unmap_lowcore(lowcore); } #endif uint32_t HELPER(stfle)(CPUS390XState *env, uint64_t addr) { const uintptr_t ra = GETPC(); const int count_bytes = ((env->regs[0] & 0xff) + 1) * 8; const int max_bytes = ROUND_UP(used_stfl_bytes, 8); int i; if (addr & 0x7) { s390_program_interrupt(env, PGM_SPECIFICATION, 4, ra); } prepare_stfl(); for (i = 0; i < count_bytes; ++i) { cpu_stb_data_ra(env, addr + i, stfl_bytes[i], ra); } env->regs[0] = deposit64(env->regs[0], 0, 8, (max_bytes / 8) - 1); return count_bytes >= max_bytes ? 0 : 3; }