diff options
Diffstat (limited to 'target/s390x/cpu.c')
| -rw-r--r-- | target/s390x/cpu.c | 462 |
1 files changed, 462 insertions, 0 deletions
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c new file mode 100644 index 0000000000..0a39d31237 --- /dev/null +++ b/target/s390x/cpu.c @@ -0,0 +1,462 @@ +/* + * 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, RUN_ON_CPU_NULL); +} +#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_realizefn(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, RUN_ON_CPU_NULL); +#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; + + 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) |