/* * QEMU S/390 CPU * * Copyright (c) 2009 Ulrich Hecht * Copyright (c) 2011 Alexander Graf * Copyright (c) 2012 SUSE LINUX Products GmbH * Copyright (c) 2012 IBM Corp. * * 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 2.1 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 * <http://www.gnu.org/licenses/lgpl-2.1.html> * Contributions after 2012-12-11 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "cpu.h" #include "qemu-common.h" #include "qemu/cutils.h" #include "qemu/timer.h" #include "qemu/error-report.h" #include "trace.h" #include "qapi/visitor.h" #include "migration/vmstate.h" #include "exec/exec-all.h" #ifndef CONFIG_USER_ONLY #include "hw/hw.h" #include "sysemu/arch_init.h" #include "sysemu/sysemu.h" #include "hw/s390x/sclp.h" #endif #define CR0_RESET 0xE0UL #define CR14_RESET 0xC2000000UL; static void s390_cpu_set_pc(CPUState *cs, vaddr value) { S390CPU *cpu = S390_CPU(cs); cpu->env.psw.addr = value; } static bool s390_cpu_has_work(CPUState *cs) { S390CPU *cpu = S390_CPU(cs); CPUS390XState *env = &cpu->env; return (cs->interrupt_request & CPU_INTERRUPT_HARD) && (env->psw.mask & PSW_MASK_EXT); } #if !defined(CONFIG_USER_ONLY) /* S390CPUClass::load_normal() */ static void s390_cpu_load_normal(CPUState *s) { S390CPU *cpu = S390_CPU(s); cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR; cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64; s390_cpu_set_state(CPU_STATE_OPERATING, cpu); } #endif /* S390CPUClass::cpu_reset() */ static void s390_cpu_reset(CPUState *s) { S390CPU *cpu = S390_CPU(s); S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); CPUS390XState *env = &cpu->env; env->pfault_token = -1UL; scc->parent_reset(s); cpu->env.sigp_order = 0; s390_cpu_set_state(CPU_STATE_STOPPED, cpu); tlb_flush(s, 1); } /* S390CPUClass::initial_reset() */ static void s390_cpu_initial_reset(CPUState *s) { S390CPU *cpu = S390_CPU(s); CPUS390XState *env = &cpu->env; int i; s390_cpu_reset(s); /* initial reset does not touch regs,fregs and aregs */ memset(&env->fpc, 0, offsetof(CPUS390XState, cpu_num) - offsetof(CPUS390XState, fpc)); /* architectured initial values for CR 0 and 14 */ env->cregs[0] = CR0_RESET; env->cregs[14] = CR14_RESET; /* architectured initial value for Breaking-Event-Address register */ env->gbea = 1; env->pfault_token = -1UL; env->ext_index = -1; for (i = 0; i < ARRAY_SIZE(env->io_index); i++) { env->io_index[i] = -1; } /* tininess for underflow is detected before rounding */ set_float_detect_tininess(float_tininess_before_rounding, &env->fpu_status); /* Reset state inside the kernel that we cannot access yet from QEMU. */ if (kvm_enabled()) { kvm_s390_reset_vcpu(cpu); } tlb_flush(s, 1); } /* CPUClass:reset() */ static void s390_cpu_full_reset(CPUState *s) { S390CPU *cpu = S390_CPU(s); S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); CPUS390XState *env = &cpu->env; int i; scc->parent_reset(s); cpu->env.sigp_order = 0; s390_cpu_set_state(CPU_STATE_STOPPED, cpu); memset(env, 0, offsetof(CPUS390XState, cpu_num)); /* architectured initial values for CR 0 and 14 */ env->cregs[0] = CR0_RESET; env->cregs[14] = CR14_RESET; /* architectured initial value for Breaking-Event-Address register */ env->gbea = 1; env->pfault_token = -1UL; env->ext_index = -1; for (i = 0; i < ARRAY_SIZE(env->io_index); i++) { env->io_index[i] = -1; } /* tininess for underflow is detected before rounding */ set_float_detect_tininess(float_tininess_before_rounding, &env->fpu_status); /* Reset state inside the kernel that we cannot access yet from QEMU. */ if (kvm_enabled()) { kvm_s390_reset_vcpu(cpu); } tlb_flush(s, 1); } #if !defined(CONFIG_USER_ONLY) static void s390_cpu_machine_reset_cb(void *opaque) { S390CPU *cpu = opaque; run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, CPU(cpu)); } #endif static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info) { info->mach = bfd_mach_s390_64; info->print_insn = print_insn_s390; } static void s390_cpu_realizefn(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); S390CPUClass *scc = S390_CPU_GET_CLASS(dev); S390CPU *cpu = S390_CPU(dev); CPUS390XState *env = &cpu->env; Error *err = NULL; /* the model has to be realized before qemu_init_vcpu() due to kvm */ s390_realize_cpu_model(cs, &err); if (err) { goto out; } #if !defined(CONFIG_USER_ONLY) if (cpu->id >= max_cpus) { error_setg(&err, "Unable to add CPU: %" PRIi64 ", max allowed: %d", cpu->id, max_cpus - 1); goto out; } #endif if (cpu_exists(cpu->id)) { error_setg(&err, "Unable to add CPU: %" PRIi64 ", it already exists", cpu->id); goto out; } if (cpu->id != scc->next_cpu_id) { error_setg(&err, "Unable to add CPU: %" PRIi64 ", The next available id is %" PRIi64, cpu->id, scc->next_cpu_id); goto out; } cpu_exec_init(cs, &err); if (err != NULL) { goto out; } scc->next_cpu_id++; #if !defined(CONFIG_USER_ONLY) qemu_register_reset(s390_cpu_machine_reset_cb, cpu); #endif env->cpu_num = cpu->id; s390_cpu_gdb_init(cs); qemu_init_vcpu(cs); #if !defined(CONFIG_USER_ONLY) run_on_cpu(cs, s390_do_cpu_full_reset, cs); #else cpu_reset(cs); #endif scc->parent_realize(dev, &err); #if !defined(CONFIG_USER_ONLY) if (dev->hotplugged) { raise_irq_cpu_hotplug(); } #endif out: error_propagate(errp, err); } static void s390x_cpu_get_id(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { S390CPU *cpu = S390_CPU(obj); int64_t value = cpu->id; visit_type_int(v, name, &value, errp); } static void s390x_cpu_set_id(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { S390CPU *cpu = S390_CPU(obj); DeviceState *dev = DEVICE(obj); const int64_t min = 0; const int64_t max = UINT32_MAX; Error *err = NULL; int64_t value; if (dev->realized) { error_setg(errp, "Attempt to set property '%s' on '%s' after " "it was realized", name, object_get_typename(obj)); return; } visit_type_int(v, name, &value, &err); if (err) { error_propagate(errp, err); return; } if (value < min || value > max) { error_setg(errp, "Property %s.%s doesn't take value %" PRId64 " (minimum: %" PRId64 ", maximum: %" PRId64 ")" , object_get_typename(obj), name, value, min, max); return; } cpu->id = value; } static void s390_cpu_initfn(Object *obj) { CPUState *cs = CPU(obj); S390CPU *cpu = S390_CPU(obj); CPUS390XState *env = &cpu->env; static bool inited; #if !defined(CONFIG_USER_ONLY) struct tm tm; #endif cs->env_ptr = env; cs->halted = 1; cs->exception_index = EXCP_HLT; object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id, s390x_cpu_set_id, NULL, NULL, NULL); s390_cpu_model_register_props(obj); #if !defined(CONFIG_USER_ONLY) qemu_get_timedate(&tm, 0); env->tod_offset = TOD_UNIX_EPOCH + (time2tod(mktimegm(&tm)) * 1000000000ULL); env->tod_basetime = 0; env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu); env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu); s390_cpu_set_state(CPU_STATE_STOPPED, cpu); #endif if (tcg_enabled() && !inited) { inited = true; s390x_translate_init(); } } static void s390_cpu_finalize(Object *obj) { #if !defined(CONFIG_USER_ONLY) S390CPU *cpu = S390_CPU(obj); qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu); g_free(cpu->irqstate); #endif } #if !defined(CONFIG_USER_ONLY) static bool disabled_wait(CPUState *cpu) { return cpu->halted && !(S390_CPU(cpu)->env.psw.mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK)); } static unsigned s390_count_running_cpus(void) { CPUState *cpu; int nr_running = 0; CPU_FOREACH(cpu) { uint8_t state = S390_CPU(cpu)->env.cpu_state; if (state == CPU_STATE_OPERATING || state == CPU_STATE_LOAD) { if (!disabled_wait(cpu)) { nr_running++; } } } return nr_running; } unsigned int s390_cpu_halt(S390CPU *cpu) { CPUState *cs = CPU(cpu); trace_cpu_halt(cs->cpu_index); if (!cs->halted) { cs->halted = 1; cs->exception_index = EXCP_HLT; } return s390_count_running_cpus(); } void s390_cpu_unhalt(S390CPU *cpu) { CPUState *cs = CPU(cpu); trace_cpu_unhalt(cs->cpu_index); if (cs->halted) { cs->halted = 0; cs->exception_index = -1; } } unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu) { trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state); switch (cpu_state) { case CPU_STATE_STOPPED: case CPU_STATE_CHECK_STOP: /* halt the cpu for common infrastructure */ s390_cpu_halt(cpu); break; case CPU_STATE_OPERATING: case CPU_STATE_LOAD: /* unhalt the cpu for common infrastructure */ s390_cpu_unhalt(cpu); break; default: error_report("Requested CPU state is not a valid S390 CPU state: %u", cpu_state); exit(1); } if (kvm_enabled() && cpu->env.cpu_state != cpu_state) { kvm_s390_set_cpu_state(cpu, cpu_state); } cpu->env.cpu_state = cpu_state; return s390_count_running_cpus(); } #endif static gchar *s390_gdb_arch_name(CPUState *cs) { return g_strdup("s390:64-bit"); } static void s390_cpu_class_init(ObjectClass *oc, void *data) { S390CPUClass *scc = S390_CPU_CLASS(oc); CPUClass *cc = CPU_CLASS(scc); DeviceClass *dc = DEVICE_CLASS(oc); scc->next_cpu_id = 0; scc->parent_realize = dc->realize; dc->realize = s390_cpu_realizefn; scc->parent_reset = cc->reset; #if !defined(CONFIG_USER_ONLY) scc->load_normal = s390_cpu_load_normal; #endif scc->cpu_reset = s390_cpu_reset; scc->initial_cpu_reset = s390_cpu_initial_reset; cc->reset = s390_cpu_full_reset; cc->class_by_name = s390_cpu_class_by_name, cc->has_work = s390_cpu_has_work; cc->do_interrupt = s390_cpu_do_interrupt; cc->dump_state = s390_cpu_dump_state; cc->set_pc = s390_cpu_set_pc; cc->gdb_read_register = s390_cpu_gdb_read_register; cc->gdb_write_register = s390_cpu_gdb_write_register; #ifdef CONFIG_USER_ONLY cc->handle_mmu_fault = s390_cpu_handle_mmu_fault; #else cc->get_phys_page_debug = s390_cpu_get_phys_page_debug; cc->vmsd = &vmstate_s390_cpu; cc->write_elf64_note = s390_cpu_write_elf64_note; cc->cpu_exec_interrupt = s390_cpu_exec_interrupt; cc->debug_excp_handler = s390x_cpu_debug_excp_handler; #endif cc->disas_set_info = s390_cpu_disas_set_info; cc->gdb_num_core_regs = S390_NUM_CORE_REGS; cc->gdb_core_xml_file = "s390x-core64.xml"; cc->gdb_arch_name = s390_gdb_arch_name; /* * Reason: s390_cpu_realizefn() calls cpu_exec_init(), which saves * the object in cpus -> dangling pointer after final * object_unref(). */ dc->cannot_destroy_with_object_finalize_yet = true; s390_cpu_model_class_register_props(oc); } static const TypeInfo s390_cpu_type_info = { .name = TYPE_S390_CPU, .parent = TYPE_CPU, .instance_size = sizeof(S390CPU), .instance_init = s390_cpu_initfn, .instance_finalize = s390_cpu_finalize, .abstract = true, .class_size = sizeof(S390CPUClass), .class_init = s390_cpu_class_init, }; static void s390_cpu_register_types(void) { type_register_static(&s390_cpu_type_info); } type_init(s390_cpu_register_types)