| /* |
| * 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 "cpu.h" |
| #include "qemu-common.h" |
| #include "qemu/timer.h" |
| #include "qemu/error-report.h" |
| #include "hw/hw.h" |
| #include "trace.h" |
| #ifndef CONFIG_USER_ONLY |
| #include "sysemu/arch_init.h" |
| #endif |
| |
| #define CR0_RESET 0xE0UL |
| #define CR14_RESET 0xC2000000UL; |
| |
| /* generate CPU information for cpu -? */ |
| void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf) |
| { |
| #ifdef CONFIG_KVM |
| (*cpu_fprintf)(f, "s390 %16s\n", "host"); |
| #endif |
| } |
| |
| #ifndef CONFIG_USER_ONLY |
| CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) |
| { |
| CpuDefinitionInfoList *entry; |
| CpuDefinitionInfo *info; |
| |
| info = g_malloc0(sizeof(*info)); |
| info->name = g_strdup("host"); |
| |
| entry = g_malloc0(sizeof(*entry)); |
| entry->value = info; |
| |
| return entry; |
| } |
| #endif |
| |
| 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_realizefn(DeviceState *dev, Error **errp) |
| { |
| CPUState *cs = CPU(dev); |
| S390CPUClass *scc = S390_CPU_GET_CLASS(dev); |
| |
| 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, errp); |
| } |
| |
| static void s390_cpu_initfn(Object *obj) |
| { |
| CPUState *cs = CPU(obj); |
| S390CPU *cpu = S390_CPU(obj); |
| CPUS390XState *env = &cpu->env; |
| static bool inited; |
| static int cpu_num = 0; |
| #if !defined(CONFIG_USER_ONLY) |
| struct tm tm; |
| #endif |
| |
| cs->env_ptr = env; |
| cpu_exec_init(cs, &error_abort); |
| #if !defined(CONFIG_USER_ONLY) |
| qemu_register_reset(s390_cpu_machine_reset_cb, cpu); |
| 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 |
| env->cpu_num = cpu_num++; |
| |
| 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 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->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->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->write_elf64_qemunote = s390_cpu_write_elf64_qemunote; |
| cc->cpu_exec_interrupt = s390_cpu_exec_interrupt; |
| cc->debug_excp_handler = s390x_cpu_debug_excp_handler; |
| #endif |
| cc->gdb_num_core_regs = S390_NUM_CORE_REGS; |
| cc->gdb_core_xml_file = "s390x-core64.xml"; |
| |
| /* |
| * Reason: s390_cpu_initfn() calls cpu_exec_init(), which saves |
| * the object in cpus -> dangling pointer after final |
| * object_unref(). |
| */ |
| dc->cannot_destroy_with_object_finalize_yet = true; |
| } |
| |
| 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 = false, |
| .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) |