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);
59 CPUS390XState *env = &cpu->env;
61 return (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
62 (env->psw.mask & PSW_MASK_EXT);
65 #if !defined(CONFIG_USER_ONLY)
66 /* S390CPUClass::load_normal() */
67 static void s390_cpu_load_normal(CPUState *s)
69 S390CPU *cpu = S390_CPU(s);
70 cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
71 cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
72 s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
76 /* S390CPUClass::cpu_reset() */
77 static void s390_cpu_reset(CPUState *s)
79 S390CPU *cpu = S390_CPU(s);
80 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
81 CPUS390XState *env = &cpu->env;
83 env->pfault_token = -1UL;
85 cpu->env.sigp_order = 0;
86 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
89 /* S390CPUClass::initial_reset() */
90 static void s390_cpu_initial_reset(CPUState *s)
92 S390CPU *cpu = S390_CPU(s);
93 CPUS390XState *env = &cpu->env;
97 /* initial reset does not clear everything! */
98 memset(&env->start_initial_reset_fields, 0,
99 offsetof(CPUS390XState, end_reset_fields) -
100 offsetof(CPUS390XState, start_initial_reset_fields));
102 /* architectured initial values for CR 0 and 14 */
103 env->cregs[0] = CR0_RESET;
104 env->cregs[14] = CR14_RESET;
106 /* architectured initial value for Breaking-Event-Address register */
109 env->pfault_token = -1UL;
110 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
111 env->io_index[i] = -1;
113 env->mchk_index = -1;
115 /* tininess for underflow is detected before rounding */
116 set_float_detect_tininess(float_tininess_before_rounding,
119 /* Reset state inside the kernel that we cannot access yet from QEMU. */
121 kvm_s390_reset_vcpu(cpu);
125 /* CPUClass:reset() */
126 static void s390_cpu_full_reset(CPUState *s)
128 S390CPU *cpu = S390_CPU(s);
129 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
130 CPUS390XState *env = &cpu->env;
133 scc->parent_reset(s);
134 cpu->env.sigp_order = 0;
135 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
137 memset(env, 0, offsetof(CPUS390XState, end_reset_fields));
139 /* architectured initial values for CR 0 and 14 */
140 env->cregs[0] = CR0_RESET;
141 env->cregs[14] = CR14_RESET;
143 /* architectured initial value for Breaking-Event-Address register */
146 env->pfault_token = -1UL;
147 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
148 env->io_index[i] = -1;
150 env->mchk_index = -1;
152 /* tininess for underflow is detected before rounding */
153 set_float_detect_tininess(float_tininess_before_rounding,
156 /* Reset state inside the kernel that we cannot access yet from QEMU. */
158 kvm_s390_reset_vcpu(cpu);
162 #if !defined(CONFIG_USER_ONLY)
163 static void s390_cpu_machine_reset_cb(void *opaque)
165 S390CPU *cpu = opaque;
167 run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
171 static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
173 info->mach = bfd_mach_s390_64;
174 info->print_insn = print_insn_s390;
177 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
179 CPUState *cs = CPU(dev);
180 S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
181 #if !defined(CONFIG_USER_ONLY)
182 S390CPU *cpu = S390_CPU(dev);
186 /* the model has to be realized before qemu_init_vcpu() due to kvm */
187 s390_realize_cpu_model(cs, &err);
192 #if !defined(CONFIG_USER_ONLY)
193 if (cpu->env.core_id >= max_cpus) {
194 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
195 ", maximum core-id: %d", cpu->env.core_id,
200 if (cpu_exists(cpu->env.core_id)) {
201 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
202 ", it already exists", cpu->env.core_id);
206 /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
207 cs->cpu_index = cpu->env.core_id;
210 cpu_exec_realizefn(cs, &err);
215 #if !defined(CONFIG_USER_ONLY)
216 qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
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 error_propagate(errp, err);
231 static void s390_cpu_initfn(Object *obj)
233 CPUState *cs = CPU(obj);
234 S390CPU *cpu = S390_CPU(obj);
235 CPUS390XState *env = &cpu->env;
237 #if !defined(CONFIG_USER_ONLY)
243 cs->exception_index = EXCP_HLT;
244 s390_cpu_model_register_props(obj);
245 #if !defined(CONFIG_USER_ONLY)
246 qemu_get_timedate(&tm, 0);
247 env->tod_offset = TOD_UNIX_EPOCH +
248 (time2tod(mktimegm(&tm)) * 1000000000ULL);
249 env->tod_basetime = 0;
250 env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
251 env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
252 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
255 if (tcg_enabled() && !inited) {
257 s390x_translate_init();
261 static void s390_cpu_finalize(Object *obj)
263 #if !defined(CONFIG_USER_ONLY)
264 S390CPU *cpu = S390_CPU(obj);
266 qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
267 g_free(cpu->irqstate);
271 #if !defined(CONFIG_USER_ONLY)
272 static bool disabled_wait(CPUState *cpu)
274 return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
275 (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
278 static unsigned s390_count_running_cpus(void)
284 uint8_t state = S390_CPU(cpu)->env.cpu_state;
285 if (state == CPU_STATE_OPERATING ||
286 state == CPU_STATE_LOAD) {
287 if (!disabled_wait(cpu)) {
296 unsigned int s390_cpu_halt(S390CPU *cpu)
298 CPUState *cs = CPU(cpu);
299 trace_cpu_halt(cs->cpu_index);
303 cs->exception_index = EXCP_HLT;
306 return s390_count_running_cpus();
309 void s390_cpu_unhalt(S390CPU *cpu)
311 CPUState *cs = CPU(cpu);
312 trace_cpu_unhalt(cs->cpu_index);
316 cs->exception_index = -1;
320 unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
322 trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
325 case CPU_STATE_STOPPED:
326 case CPU_STATE_CHECK_STOP:
327 /* halt the cpu for common infrastructure */
330 case CPU_STATE_OPERATING:
332 /* unhalt the cpu for common infrastructure */
333 s390_cpu_unhalt(cpu);
336 error_report("Requested CPU state is not a valid S390 CPU state: %u",
340 if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
341 kvm_s390_set_cpu_state(cpu, cpu_state);
343 cpu->env.cpu_state = cpu_state;
345 return s390_count_running_cpus();
348 int s390_get_clock(uint8_t *tod_high, uint64_t *tod_low)
353 r = kvm_s390_get_clock_ext(tod_high, tod_low);
355 return kvm_s390_get_clock(tod_high, tod_low);
366 int s390_set_clock(uint8_t *tod_high, uint64_t *tod_low)
371 r = kvm_s390_set_clock_ext(tod_high, tod_low);
373 return kvm_s390_set_clock(tod_high, tod_low);
380 int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
383 return kvm_s390_set_mem_limit(new_limit, hw_limit);
388 void s390_cmma_reset(void)
391 kvm_s390_cmma_reset();
395 int s390_cpu_restart(S390CPU *cpu)
398 return kvm_s390_cpu_restart(cpu);
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 scc->parent_realize = dc->realize;
466 dc->realize = s390_cpu_realizefn;
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->gdb_num_core_regs = S390_NUM_CORE_REGS;
501 cc->gdb_core_xml_file = "s390x-core64.xml";
502 cc->gdb_arch_name = s390_gdb_arch_name;
504 s390_cpu_model_class_register_props(oc);
507 static const TypeInfo s390_cpu_type_info = {
508 .name = TYPE_S390_CPU,
510 .instance_size = sizeof(S390CPU),
511 .instance_init = s390_cpu_initfn,
512 .instance_finalize = s390_cpu_finalize,
514 .class_size = sizeof(S390CPUClass),
515 .class_init = s390_cpu_class_init,
518 static void s390_cpu_register_types(void)
520 type_register_static(&s390_cpu_type_info);
523 type_init(s390_cpu_register_types)