4 * Copyright (c) 2009 Ulrich Hecht
5 * Copyright (c) 2011 Alexander Graf
6 * Copyright (c) 2012 SUSE LINUX Products GmbH
7 * Copyright (c) 2012 IBM Corp.
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, see
21 * <http://www.gnu.org/licenses/lgpl-2.1.html>
22 * Contributions after 2012-12-11 are licensed under the terms of the
23 * GNU GPL, version 2 or (at your option) any later version.
26 #include "qemu/osdep.h"
27 #include "qapi/error.h"
29 #include "qemu-common.h"
30 #include "qemu/cutils.h"
31 #include "qemu/timer.h"
32 #include "qemu/error-report.h"
34 #include "qapi/visitor.h"
35 #include "migration/vmstate.h"
36 #include "exec/exec-all.h"
37 #ifndef CONFIG_USER_ONLY
39 #include "sysemu/arch_init.h"
40 #include "sysemu/sysemu.h"
41 #include "hw/s390x/sclp.h"
44 #define CR0_RESET 0xE0UL
45 #define CR14_RESET 0xC2000000UL;
47 static void s390_cpu_set_pc(CPUState *cs, vaddr value)
49 S390CPU *cpu = S390_CPU(cs);
51 cpu->env.psw.addr = value;
54 static bool s390_cpu_has_work(CPUState *cs)
56 S390CPU *cpu = S390_CPU(cs);
57 CPUS390XState *env = &cpu->env;
59 return (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
60 (env->psw.mask & PSW_MASK_EXT);
63 #if !defined(CONFIG_USER_ONLY)
64 /* S390CPUClass::load_normal() */
65 static void s390_cpu_load_normal(CPUState *s)
67 S390CPU *cpu = S390_CPU(s);
68 cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
69 cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
70 s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
74 /* S390CPUClass::cpu_reset() */
75 static void s390_cpu_reset(CPUState *s)
77 S390CPU *cpu = S390_CPU(s);
78 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
79 CPUS390XState *env = &cpu->env;
81 env->pfault_token = -1UL;
83 cpu->env.sigp_order = 0;
84 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
87 /* S390CPUClass::initial_reset() */
88 static void s390_cpu_initial_reset(CPUState *s)
90 S390CPU *cpu = S390_CPU(s);
91 CPUS390XState *env = &cpu->env;
95 /* initial reset does not clear everything! */
96 memset(&env->start_initial_reset_fields, 0,
97 offsetof(CPUS390XState, end_reset_fields) -
98 offsetof(CPUS390XState, start_initial_reset_fields));
100 /* architectured initial values for CR 0 and 14 */
101 env->cregs[0] = CR0_RESET;
102 env->cregs[14] = CR14_RESET;
104 /* architectured initial value for Breaking-Event-Address register */
107 env->pfault_token = -1UL;
109 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
110 env->io_index[i] = -1;
113 /* tininess for underflow is detected before rounding */
114 set_float_detect_tininess(float_tininess_before_rounding,
117 /* Reset state inside the kernel that we cannot access yet from QEMU. */
119 kvm_s390_reset_vcpu(cpu);
123 /* CPUClass:reset() */
124 static void s390_cpu_full_reset(CPUState *s)
126 S390CPU *cpu = S390_CPU(s);
127 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
128 CPUS390XState *env = &cpu->env;
131 scc->parent_reset(s);
132 cpu->env.sigp_order = 0;
133 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
135 memset(env, 0, offsetof(CPUS390XState, end_reset_fields));
137 /* architectured initial values for CR 0 and 14 */
138 env->cregs[0] = CR0_RESET;
139 env->cregs[14] = CR14_RESET;
141 /* architectured initial value for Breaking-Event-Address register */
144 env->pfault_token = -1UL;
146 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
147 env->io_index[i] = -1;
150 /* tininess for underflow is detected before rounding */
151 set_float_detect_tininess(float_tininess_before_rounding,
154 /* Reset state inside the kernel that we cannot access yet from QEMU. */
156 kvm_s390_reset_vcpu(cpu);
160 #if !defined(CONFIG_USER_ONLY)
161 static void s390_cpu_machine_reset_cb(void *opaque)
163 S390CPU *cpu = opaque;
165 run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
169 static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
171 info->mach = bfd_mach_s390_64;
172 info->print_insn = print_insn_s390;
175 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
177 CPUState *cs = CPU(dev);
178 S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
179 S390CPU *cpu = S390_CPU(dev);
180 CPUS390XState *env = &cpu->env;
183 /* the model has to be realized before qemu_init_vcpu() due to kvm */
184 s390_realize_cpu_model(cs, &err);
189 #if !defined(CONFIG_USER_ONLY)
190 if (cpu->id >= max_cpus) {
191 error_setg(&err, "Unable to add CPU: %" PRIi64
192 ", max allowed: %d", cpu->id, max_cpus - 1);
196 if (cpu_exists(cpu->id)) {
197 error_setg(&err, "Unable to add CPU: %" PRIi64
198 ", it already exists", cpu->id);
201 if (cpu->id != scc->next_cpu_id) {
202 error_setg(&err, "Unable to add CPU: %" PRIi64
203 ", The next available id is %" PRIi64, cpu->id,
208 cpu_exec_realizefn(cs, &err);
214 #if !defined(CONFIG_USER_ONLY)
215 qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
217 env->cpu_num = cpu->id;
218 s390_cpu_gdb_init(cs);
220 #if !defined(CONFIG_USER_ONLY)
221 run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
226 scc->parent_realize(dev, &err);
228 #if !defined(CONFIG_USER_ONLY)
229 if (dev->hotplugged) {
230 raise_irq_cpu_hotplug();
235 error_propagate(errp, err);
238 static void s390x_cpu_get_id(Object *obj, Visitor *v, const char *name,
239 void *opaque, Error **errp)
241 S390CPU *cpu = S390_CPU(obj);
242 int64_t value = cpu->id;
244 visit_type_int(v, name, &value, errp);
247 static void s390x_cpu_set_id(Object *obj, Visitor *v, const char *name,
248 void *opaque, Error **errp)
250 S390CPU *cpu = S390_CPU(obj);
251 DeviceState *dev = DEVICE(obj);
252 const int64_t min = 0;
253 const int64_t max = UINT32_MAX;
258 error_setg(errp, "Attempt to set property '%s' on '%s' after "
259 "it was realized", name, object_get_typename(obj));
263 visit_type_int(v, name, &value, &err);
265 error_propagate(errp, err);
268 if (value < min || value > max) {
269 error_setg(errp, "Property %s.%s doesn't take value %" PRId64
270 " (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
271 object_get_typename(obj), name, value, min, max);
277 static void s390_cpu_initfn(Object *obj)
279 CPUState *cs = CPU(obj);
280 S390CPU *cpu = S390_CPU(obj);
281 CPUS390XState *env = &cpu->env;
283 #if !defined(CONFIG_USER_ONLY)
289 cs->exception_index = EXCP_HLT;
290 object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id,
291 s390x_cpu_set_id, NULL, NULL, NULL);
292 s390_cpu_model_register_props(obj);
293 #if !defined(CONFIG_USER_ONLY)
294 qemu_get_timedate(&tm, 0);
295 env->tod_offset = TOD_UNIX_EPOCH +
296 (time2tod(mktimegm(&tm)) * 1000000000ULL);
297 env->tod_basetime = 0;
298 env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
299 env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
300 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
303 if (tcg_enabled() && !inited) {
305 s390x_translate_init();
309 static void s390_cpu_finalize(Object *obj)
311 #if !defined(CONFIG_USER_ONLY)
312 S390CPU *cpu = S390_CPU(obj);
314 qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
315 g_free(cpu->irqstate);
319 #if !defined(CONFIG_USER_ONLY)
320 static bool disabled_wait(CPUState *cpu)
322 return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
323 (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
326 static unsigned s390_count_running_cpus(void)
332 uint8_t state = S390_CPU(cpu)->env.cpu_state;
333 if (state == CPU_STATE_OPERATING ||
334 state == CPU_STATE_LOAD) {
335 if (!disabled_wait(cpu)) {
344 unsigned int s390_cpu_halt(S390CPU *cpu)
346 CPUState *cs = CPU(cpu);
347 trace_cpu_halt(cs->cpu_index);
351 cs->exception_index = EXCP_HLT;
354 return s390_count_running_cpus();
357 void s390_cpu_unhalt(S390CPU *cpu)
359 CPUState *cs = CPU(cpu);
360 trace_cpu_unhalt(cs->cpu_index);
364 cs->exception_index = -1;
368 unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
370 trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
373 case CPU_STATE_STOPPED:
374 case CPU_STATE_CHECK_STOP:
375 /* halt the cpu for common infrastructure */
378 case CPU_STATE_OPERATING:
380 /* unhalt the cpu for common infrastructure */
381 s390_cpu_unhalt(cpu);
384 error_report("Requested CPU state is not a valid S390 CPU state: %u",
388 if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
389 kvm_s390_set_cpu_state(cpu, cpu_state);
391 cpu->env.cpu_state = cpu_state;
393 return s390_count_running_cpus();
397 static gchar *s390_gdb_arch_name(CPUState *cs)
399 return g_strdup("s390:64-bit");
402 static void s390_cpu_class_init(ObjectClass *oc, void *data)
404 S390CPUClass *scc = S390_CPU_CLASS(oc);
405 CPUClass *cc = CPU_CLASS(scc);
406 DeviceClass *dc = DEVICE_CLASS(oc);
408 scc->next_cpu_id = 0;
409 scc->parent_realize = dc->realize;
410 dc->realize = s390_cpu_realizefn;
412 scc->parent_reset = cc->reset;
413 #if !defined(CONFIG_USER_ONLY)
414 scc->load_normal = s390_cpu_load_normal;
416 scc->cpu_reset = s390_cpu_reset;
417 scc->initial_cpu_reset = s390_cpu_initial_reset;
418 cc->reset = s390_cpu_full_reset;
419 cc->class_by_name = s390_cpu_class_by_name,
420 cc->has_work = s390_cpu_has_work;
421 cc->do_interrupt = s390_cpu_do_interrupt;
422 cc->dump_state = s390_cpu_dump_state;
423 cc->set_pc = s390_cpu_set_pc;
424 cc->gdb_read_register = s390_cpu_gdb_read_register;
425 cc->gdb_write_register = s390_cpu_gdb_write_register;
426 #ifdef CONFIG_USER_ONLY
427 cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
429 cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
430 cc->vmsd = &vmstate_s390_cpu;
431 cc->write_elf64_note = s390_cpu_write_elf64_note;
432 cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
433 cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
434 cc->do_unaligned_access = s390x_cpu_do_unaligned_access;
436 cc->disas_set_info = s390_cpu_disas_set_info;
438 cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
439 cc->gdb_core_xml_file = "s390x-core64.xml";
440 cc->gdb_arch_name = s390_gdb_arch_name;
442 s390_cpu_model_class_register_props(oc);
445 static const TypeInfo s390_cpu_type_info = {
446 .name = TYPE_S390_CPU,
448 .instance_size = sizeof(S390CPU),
449 .instance_init = s390_cpu_initfn,
450 .instance_finalize = s390_cpu_finalize,
452 .class_size = sizeof(S390CPUClass),
453 .class_init = s390_cpu_class_init,
456 static void s390_cpu_register_types(void)
458 type_register_static(&s390_cpu_type_info);
461 type_init(s390_cpu_register_types)