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;
93 cpu->env.sigp_order = 0;
94 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
97 /* S390CPUClass::initial_reset() */
98 static void s390_cpu_initial_reset(CPUState *s)
100 S390CPU *cpu = S390_CPU(s);
101 CPUS390XState *env = &cpu->env;
105 /* initial reset does not clear everything! */
106 memset(&env->start_initial_reset_fields, 0,
107 offsetof(CPUS390XState, end_reset_fields) -
108 offsetof(CPUS390XState, start_initial_reset_fields));
110 /* architectured initial values for CR 0 and 14 */
111 env->cregs[0] = CR0_RESET;
112 env->cregs[14] = CR14_RESET;
114 /* architectured initial value for Breaking-Event-Address register */
117 env->pfault_token = -1UL;
118 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
119 env->io_index[i] = -1;
121 env->mchk_index = -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;
158 env->mchk_index = -1;
160 /* tininess for underflow is detected before rounding */
161 set_float_detect_tininess(float_tininess_before_rounding,
164 /* Reset state inside the kernel that we cannot access yet from QEMU. */
166 kvm_s390_reset_vcpu(cpu);
170 #if !defined(CONFIG_USER_ONLY)
171 static void s390_cpu_machine_reset_cb(void *opaque)
173 S390CPU *cpu = opaque;
175 run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
179 static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
181 info->mach = bfd_mach_s390_64;
182 info->print_insn = print_insn_s390;
185 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
187 CPUState *cs = CPU(dev);
188 S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
189 #if !defined(CONFIG_USER_ONLY)
190 S390CPU *cpu = S390_CPU(dev);
194 /* the model has to be realized before qemu_init_vcpu() due to kvm */
195 s390_realize_cpu_model(cs, &err);
200 #if !defined(CONFIG_USER_ONLY)
201 if (cpu->env.core_id >= max_cpus) {
202 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
203 ", maximum core-id: %d", cpu->env.core_id,
208 if (cpu_exists(cpu->env.core_id)) {
209 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
210 ", it already exists", cpu->env.core_id);
214 /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
215 cs->cpu_index = cpu->env.core_id;
218 cpu_exec_realizefn(cs, &err);
223 #if !defined(CONFIG_USER_ONLY)
224 qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
226 s390_cpu_gdb_init(cs);
228 #if !defined(CONFIG_USER_ONLY)
229 run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
234 scc->parent_realize(dev, &err);
236 error_propagate(errp, err);
239 static void s390_cpu_initfn(Object *obj)
241 CPUState *cs = CPU(obj);
242 S390CPU *cpu = S390_CPU(obj);
243 CPUS390XState *env = &cpu->env;
244 #if !defined(CONFIG_USER_ONLY)
250 cs->exception_index = EXCP_HLT;
251 s390_cpu_model_register_props(obj);
252 #if !defined(CONFIG_USER_ONLY)
253 qemu_get_timedate(&tm, 0);
254 env->tod_offset = TOD_UNIX_EPOCH +
255 (time2tod(mktimegm(&tm)) * 1000000000ULL);
256 env->tod_basetime = 0;
257 env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
258 env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
259 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
263 static void s390_cpu_finalize(Object *obj)
265 #if !defined(CONFIG_USER_ONLY)
266 S390CPU *cpu = S390_CPU(obj);
268 qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
269 g_free(cpu->irqstate);
273 #if !defined(CONFIG_USER_ONLY)
274 static bool disabled_wait(CPUState *cpu)
276 return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
277 (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
280 static unsigned s390_count_running_cpus(void)
286 uint8_t state = S390_CPU(cpu)->env.cpu_state;
287 if (state == CPU_STATE_OPERATING ||
288 state == CPU_STATE_LOAD) {
289 if (!disabled_wait(cpu)) {
298 unsigned int s390_cpu_halt(S390CPU *cpu)
300 CPUState *cs = CPU(cpu);
301 trace_cpu_halt(cs->cpu_index);
305 cs->exception_index = EXCP_HLT;
308 return s390_count_running_cpus();
311 void s390_cpu_unhalt(S390CPU *cpu)
313 CPUState *cs = CPU(cpu);
314 trace_cpu_unhalt(cs->cpu_index);
318 cs->exception_index = -1;
322 unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
324 trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
327 case CPU_STATE_STOPPED:
328 case CPU_STATE_CHECK_STOP:
329 /* halt the cpu for common infrastructure */
332 case CPU_STATE_OPERATING:
335 * Starting a CPU with a PSW WAIT bit set:
336 * KVM: handles this internally and triggers another WAIT exit.
337 * TCG: will actually try to continue to run. Don't unhalt, will
338 * be done when the CPU actually has work (an interrupt).
340 if (!tcg_enabled() || !(cpu->env.psw.mask & PSW_MASK_WAIT)) {
341 s390_cpu_unhalt(cpu);
345 error_report("Requested CPU state is not a valid S390 CPU state: %u",
349 if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
350 kvm_s390_set_cpu_state(cpu, cpu_state);
352 cpu->env.cpu_state = cpu_state;
354 return s390_count_running_cpus();
357 int s390_get_clock(uint8_t *tod_high, uint64_t *tod_low)
362 r = kvm_s390_get_clock_ext(tod_high, tod_low);
364 return kvm_s390_get_clock(tod_high, tod_low);
375 int s390_set_clock(uint8_t *tod_high, uint64_t *tod_low)
380 r = kvm_s390_set_clock_ext(tod_high, tod_low);
382 return kvm_s390_set_clock(tod_high, tod_low);
389 int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
392 return kvm_s390_set_mem_limit(new_limit, hw_limit);
397 void s390_cmma_reset(void)
400 kvm_s390_cmma_reset();
404 int s390_get_memslot_count(void)
407 return kvm_s390_get_memslot_count();
409 return MAX_AVAIL_SLOTS;
413 int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id,
417 return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign);
423 void s390_crypto_reset(void)
426 kvm_s390_crypto_reset();
430 bool s390_get_squash_mcss(void)
432 if (object_property_get_bool(OBJECT(qdev_get_machine()), "s390-squash-mcss",
440 void s390_enable_css_support(S390CPU *cpu)
443 kvm_s390_enable_css_support(cpu);
448 static gchar *s390_gdb_arch_name(CPUState *cs)
450 return g_strdup("s390:64-bit");
453 static Property s390x_cpu_properties[] = {
454 #if !defined(CONFIG_USER_ONLY)
455 DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0),
457 DEFINE_PROP_END_OF_LIST()
460 static void s390_cpu_class_init(ObjectClass *oc, void *data)
462 S390CPUClass *scc = S390_CPU_CLASS(oc);
463 CPUClass *cc = CPU_CLASS(scc);
464 DeviceClass *dc = DEVICE_CLASS(oc);
466 scc->parent_realize = dc->realize;
467 dc->realize = s390_cpu_realizefn;
468 dc->props = s390x_cpu_properties;
469 dc->user_creatable = true;
471 scc->parent_reset = cc->reset;
472 #if !defined(CONFIG_USER_ONLY)
473 scc->load_normal = s390_cpu_load_normal;
475 scc->cpu_reset = s390_cpu_reset;
476 scc->initial_cpu_reset = s390_cpu_initial_reset;
477 cc->reset = s390_cpu_full_reset;
478 cc->class_by_name = s390_cpu_class_by_name,
479 cc->has_work = s390_cpu_has_work;
481 cc->do_interrupt = s390_cpu_do_interrupt;
483 cc->dump_state = s390_cpu_dump_state;
484 cc->set_pc = s390_cpu_set_pc;
485 cc->gdb_read_register = s390_cpu_gdb_read_register;
486 cc->gdb_write_register = s390_cpu_gdb_write_register;
487 #ifdef CONFIG_USER_ONLY
488 cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
490 cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
491 cc->vmsd = &vmstate_s390_cpu;
492 cc->write_elf64_note = s390_cpu_write_elf64_note;
494 cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
495 cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
496 cc->do_unaligned_access = s390x_cpu_do_unaligned_access;
499 cc->disas_set_info = s390_cpu_disas_set_info;
501 cc->tcg_initialize = s390x_translate_init;
504 cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
505 cc->gdb_core_xml_file = "s390x-core64.xml";
506 cc->gdb_arch_name = s390_gdb_arch_name;
508 s390_cpu_model_class_register_props(oc);
511 static const TypeInfo s390_cpu_type_info = {
512 .name = TYPE_S390_CPU,
514 .instance_size = sizeof(S390CPU),
515 .instance_init = s390_cpu_initfn,
516 .instance_finalize = s390_cpu_finalize,
518 .class_size = sizeof(S390CPUClass),
519 .class_init = s390_cpu_class_init,
522 static void s390_cpu_register_types(void)
524 type_register_static(&s390_cpu_type_info);
527 type_init(s390_cpu_register_types)