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"
30 #include "kvm_s390x.h"
31 #include "sysemu/kvm.h"
32 #include "qemu-common.h"
33 #include "qemu/cutils.h"
34 #include "qemu/timer.h"
35 #include "qemu/error-report.h"
37 #include "qapi/visitor.h"
38 #include "exec/exec-all.h"
39 #include "hw/qdev-properties.h"
40 #ifndef CONFIG_USER_ONLY
42 #include "sysemu/arch_init.h"
43 #include "sysemu/sysemu.h"
46 #define CR0_RESET 0xE0UL
47 #define CR14_RESET 0xC2000000UL;
49 static void s390_cpu_set_pc(CPUState *cs, vaddr value)
51 S390CPU *cpu = S390_CPU(cs);
53 cpu->env.psw.addr = value;
56 static bool s390_cpu_has_work(CPUState *cs)
58 S390CPU *cpu = S390_CPU(cs);
60 /* STOPPED cpus can never wake up */
61 if (s390_cpu_get_state(cpu) != CPU_STATE_LOAD &&
62 s390_cpu_get_state(cpu) != CPU_STATE_OPERATING) {
66 if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
70 return s390_cpu_has_int(cpu);
73 #if !defined(CONFIG_USER_ONLY)
74 /* S390CPUClass::load_normal() */
75 static void s390_cpu_load_normal(CPUState *s)
77 S390CPU *cpu = S390_CPU(s);
78 cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
79 cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
80 s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
84 /* S390CPUClass::cpu_reset() */
85 static void s390_cpu_reset(CPUState *s)
87 S390CPU *cpu = S390_CPU(s);
88 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
89 CPUS390XState *env = &cpu->env;
91 env->pfault_token = -1UL;
94 cpu->env.sigp_order = 0;
95 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
98 /* S390CPUClass::initial_reset() */
99 static void s390_cpu_initial_reset(CPUState *s)
101 S390CPU *cpu = S390_CPU(s);
102 CPUS390XState *env = &cpu->env;
106 /* initial reset does not clear everything! */
107 memset(&env->start_initial_reset_fields, 0,
108 offsetof(CPUS390XState, end_reset_fields) -
109 offsetof(CPUS390XState, start_initial_reset_fields));
111 /* architectured initial values for CR 0 and 14 */
112 env->cregs[0] = CR0_RESET;
113 env->cregs[14] = CR14_RESET;
115 /* architectured initial value for Breaking-Event-Address register */
118 env->pfault_token = -1UL;
119 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
120 env->io_index[i] = -1;
123 /* tininess for underflow is detected before rounding */
124 set_float_detect_tininess(float_tininess_before_rounding,
127 /* Reset state inside the kernel that we cannot access yet from QEMU. */
129 kvm_s390_reset_vcpu(cpu);
133 /* CPUClass:reset() */
134 static void s390_cpu_full_reset(CPUState *s)
136 S390CPU *cpu = S390_CPU(s);
137 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
138 CPUS390XState *env = &cpu->env;
141 scc->parent_reset(s);
142 cpu->env.sigp_order = 0;
143 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
145 memset(env, 0, offsetof(CPUS390XState, end_reset_fields));
147 /* architectured initial values for CR 0 and 14 */
148 env->cregs[0] = CR0_RESET;
149 env->cregs[14] = CR14_RESET;
151 /* architectured initial value for Breaking-Event-Address register */
154 env->pfault_token = -1UL;
155 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
156 env->io_index[i] = -1;
159 /* tininess for underflow is detected before rounding */
160 set_float_detect_tininess(float_tininess_before_rounding,
163 /* Reset state inside the kernel that we cannot access yet from QEMU. */
165 kvm_s390_reset_vcpu(cpu);
169 #if !defined(CONFIG_USER_ONLY)
170 static void s390_cpu_machine_reset_cb(void *opaque)
172 S390CPU *cpu = opaque;
174 run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
178 static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
180 info->mach = bfd_mach_s390_64;
181 info->print_insn = print_insn_s390;
184 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
186 CPUState *cs = CPU(dev);
187 S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
188 #if !defined(CONFIG_USER_ONLY)
189 S390CPU *cpu = S390_CPU(dev);
193 /* the model has to be realized before qemu_init_vcpu() due to kvm */
194 s390_realize_cpu_model(cs, &err);
199 #if !defined(CONFIG_USER_ONLY)
200 if (cpu->env.core_id >= max_cpus) {
201 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
202 ", maximum core-id: %d", cpu->env.core_id,
207 if (cpu_exists(cpu->env.core_id)) {
208 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
209 ", it already exists", cpu->env.core_id);
213 /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
214 cs->cpu_index = cpu->env.core_id;
217 cpu_exec_realizefn(cs, &err);
222 #if !defined(CONFIG_USER_ONLY)
223 qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
225 s390_cpu_gdb_init(cs);
227 #if !defined(CONFIG_USER_ONLY)
228 run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
233 scc->parent_realize(dev, &err);
235 error_propagate(errp, err);
238 static void s390_cpu_initfn(Object *obj)
240 CPUState *cs = CPU(obj);
241 S390CPU *cpu = S390_CPU(obj);
242 CPUS390XState *env = &cpu->env;
243 #if !defined(CONFIG_USER_ONLY)
249 cs->exception_index = EXCP_HLT;
250 s390_cpu_model_register_props(obj);
251 #if !defined(CONFIG_USER_ONLY)
252 qemu_get_timedate(&tm, 0);
253 env->tod_offset = TOD_UNIX_EPOCH +
254 (time2tod(mktimegm(&tm)) * 1000000000ULL);
255 env->tod_basetime = 0;
256 env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
257 env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
258 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
262 static void s390_cpu_finalize(Object *obj)
264 #if !defined(CONFIG_USER_ONLY)
265 S390CPU *cpu = S390_CPU(obj);
267 qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
268 g_free(cpu->irqstate);
272 #if !defined(CONFIG_USER_ONLY)
273 static bool disabled_wait(CPUState *cpu)
275 return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
276 (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
279 static unsigned s390_count_running_cpus(void)
285 uint8_t state = S390_CPU(cpu)->env.cpu_state;
286 if (state == CPU_STATE_OPERATING ||
287 state == CPU_STATE_LOAD) {
288 if (!disabled_wait(cpu)) {
297 unsigned int s390_cpu_halt(S390CPU *cpu)
299 CPUState *cs = CPU(cpu);
300 trace_cpu_halt(cs->cpu_index);
304 cs->exception_index = EXCP_HLT;
307 return s390_count_running_cpus();
310 void s390_cpu_unhalt(S390CPU *cpu)
312 CPUState *cs = CPU(cpu);
313 trace_cpu_unhalt(cs->cpu_index);
317 cs->exception_index = -1;
321 unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
323 trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
326 case CPU_STATE_STOPPED:
327 case CPU_STATE_CHECK_STOP:
328 /* halt the cpu for common infrastructure */
331 case CPU_STATE_OPERATING:
334 * Starting a CPU with a PSW WAIT bit set:
335 * KVM: handles this internally and triggers another WAIT exit.
336 * TCG: will actually try to continue to run. Don't unhalt, will
337 * be done when the CPU actually has work (an interrupt).
339 if (!tcg_enabled() || !(cpu->env.psw.mask & PSW_MASK_WAIT)) {
340 s390_cpu_unhalt(cpu);
344 error_report("Requested CPU state is not a valid S390 CPU state: %u",
348 if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
349 kvm_s390_set_cpu_state(cpu, cpu_state);
351 cpu->env.cpu_state = cpu_state;
353 return s390_count_running_cpus();
356 int s390_get_clock(uint8_t *tod_high, uint64_t *tod_low)
361 r = kvm_s390_get_clock_ext(tod_high, tod_low);
363 return kvm_s390_get_clock(tod_high, tod_low);
374 int s390_set_clock(uint8_t *tod_high, uint64_t *tod_low)
379 r = kvm_s390_set_clock_ext(tod_high, tod_low);
381 return kvm_s390_set_clock(tod_high, tod_low);
388 int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
391 return kvm_s390_set_mem_limit(new_limit, hw_limit);
396 void s390_cmma_reset(void)
399 kvm_s390_cmma_reset();
403 int s390_get_memslot_count(void)
406 return kvm_s390_get_memslot_count();
408 return MAX_AVAIL_SLOTS;
412 int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id,
416 return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign);
422 void s390_crypto_reset(void)
425 kvm_s390_crypto_reset();
429 bool s390_get_squash_mcss(void)
431 if (object_property_get_bool(OBJECT(qdev_get_machine()), "s390-squash-mcss",
439 void s390_enable_css_support(S390CPU *cpu)
442 kvm_s390_enable_css_support(cpu);
447 static gchar *s390_gdb_arch_name(CPUState *cs)
449 return g_strdup("s390:64-bit");
452 static Property s390x_cpu_properties[] = {
453 #if !defined(CONFIG_USER_ONLY)
454 DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0),
456 DEFINE_PROP_END_OF_LIST()
459 static void s390_cpu_class_init(ObjectClass *oc, void *data)
461 S390CPUClass *scc = S390_CPU_CLASS(oc);
462 CPUClass *cc = CPU_CLASS(scc);
463 DeviceClass *dc = DEVICE_CLASS(oc);
465 device_class_set_parent_realize(dc, s390_cpu_realizefn,
466 &scc->parent_realize);
467 dc->props = s390x_cpu_properties;
468 dc->user_creatable = true;
470 scc->parent_reset = cc->reset;
471 #if !defined(CONFIG_USER_ONLY)
472 scc->load_normal = s390_cpu_load_normal;
474 scc->cpu_reset = s390_cpu_reset;
475 scc->initial_cpu_reset = s390_cpu_initial_reset;
476 cc->reset = s390_cpu_full_reset;
477 cc->class_by_name = s390_cpu_class_by_name,
478 cc->has_work = s390_cpu_has_work;
480 cc->do_interrupt = s390_cpu_do_interrupt;
482 cc->dump_state = s390_cpu_dump_state;
483 cc->set_pc = s390_cpu_set_pc;
484 cc->gdb_read_register = s390_cpu_gdb_read_register;
485 cc->gdb_write_register = s390_cpu_gdb_write_register;
486 #ifdef CONFIG_USER_ONLY
487 cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
489 cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
490 cc->vmsd = &vmstate_s390_cpu;
491 cc->write_elf64_note = s390_cpu_write_elf64_note;
493 cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
494 cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
495 cc->do_unaligned_access = s390x_cpu_do_unaligned_access;
498 cc->disas_set_info = s390_cpu_disas_set_info;
500 cc->tcg_initialize = s390x_translate_init;
503 cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
504 cc->gdb_core_xml_file = "s390x-core64.xml";
505 cc->gdb_arch_name = s390_gdb_arch_name;
507 s390_cpu_model_class_register_props(oc);
510 static const TypeInfo s390_cpu_type_info = {
511 .name = TYPE_S390_CPU,
513 .instance_size = sizeof(S390CPU),
514 .instance_init = s390_cpu_initfn,
515 .instance_finalize = s390_cpu_finalize,
517 .class_size = sizeof(S390CPUClass),
518 .class_init = s390_cpu_class_init,
521 static void s390_cpu_register_types(void)
523 type_register_static(&s390_cpu_type_info);
526 type_init(s390_cpu_register_types)