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 program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program 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 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
23 #include "qemu/osdep.h"
24 #include "qapi/error.h"
27 #include "kvm_s390x.h"
28 #include "sysemu/kvm.h"
29 #include "sysemu/reset.h"
30 #include "qemu/timer.h"
31 #include "qemu/error-report.h"
32 #include "qemu/module.h"
34 #include "qapi/visitor.h"
35 #include "qapi/qapi-types-machine.h"
36 #include "qapi/qapi-visit-run-state.h"
37 #include "sysemu/hw_accel.h"
38 #include "hw/qdev-properties.h"
39 #ifndef CONFIG_USER_ONLY
40 #include "hw/boards.h"
41 #include "sysemu/arch_init.h"
42 #include "sysemu/sysemu.h"
43 #include "sysemu/tcg.h"
45 #include "fpu/softfloat-helpers.h"
47 #define CR0_RESET 0xE0UL
48 #define CR14_RESET 0xC2000000UL;
50 static void s390_cpu_set_pc(CPUState
*cs
, vaddr value
)
52 S390CPU
*cpu
= S390_CPU(cs
);
54 cpu
->env
.psw
.addr
= value
;
57 static bool s390_cpu_has_work(CPUState
*cs
)
59 S390CPU
*cpu
= S390_CPU(cs
);
61 /* STOPPED cpus can never wake up */
62 if (s390_cpu_get_state(cpu
) != S390_CPU_STATE_LOAD
&&
63 s390_cpu_get_state(cpu
) != S390_CPU_STATE_OPERATING
) {
67 if (!(cs
->interrupt_request
& CPU_INTERRUPT_HARD
)) {
71 return s390_cpu_has_int(cpu
);
74 #if !defined(CONFIG_USER_ONLY)
75 /* S390CPUClass::load_normal() */
76 static void s390_cpu_load_normal(CPUState
*s
)
78 S390CPU
*cpu
= S390_CPU(s
);
79 cpu
->env
.psw
.addr
= ldl_phys(s
->as
, 4) & PSW_MASK_ESA_ADDR
;
80 cpu
->env
.psw
.mask
= PSW_MASK_32
| PSW_MASK_64
;
81 s390_cpu_set_state(S390_CPU_STATE_OPERATING
, cpu
);
85 /* S390CPUClass::cpu_reset() */
86 static void s390_cpu_reset(CPUState
*s
)
88 S390CPU
*cpu
= S390_CPU(s
);
89 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
90 CPUS390XState
*env
= &cpu
->env
;
92 env
->pfault_token
= -1UL;
95 cpu
->env
.sigp_order
= 0;
96 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
99 /* S390CPUClass::initial_reset() */
100 static void s390_cpu_initial_reset(CPUState
*s
)
102 S390CPU
*cpu
= S390_CPU(s
);
103 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;
120 /* tininess for underflow is detected before rounding */
121 set_float_detect_tininess(float_tininess_before_rounding
,
124 /* Reset state inside the kernel that we cannot access yet from QEMU. */
126 kvm_s390_reset_vcpu(cpu
);
130 /* CPUClass:reset() */
131 static void s390_cpu_full_reset(CPUState
*s
)
133 S390CPU
*cpu
= S390_CPU(s
);
134 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
135 CPUS390XState
*env
= &cpu
->env
;
137 scc
->parent_reset(s
);
138 cpu
->env
.sigp_order
= 0;
139 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
141 memset(env
, 0, offsetof(CPUS390XState
, end_reset_fields
));
143 /* architectured initial values for CR 0 and 14 */
144 env
->cregs
[0] = CR0_RESET
;
145 env
->cregs
[14] = CR14_RESET
;
147 #if defined(CONFIG_USER_ONLY)
148 /* user mode should always be allowed to use the full FPU */
149 env
->cregs
[0] |= CR0_AFP
;
150 if (s390_has_feat(S390_FEAT_VECTOR
)) {
151 env
->cregs
[0] |= CR0_VECTOR
;
155 /* architectured initial value for Breaking-Event-Address register */
158 env
->pfault_token
= -1UL;
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 MachineState
*ms
= MACHINE(qdev_get_machine());
202 unsigned int max_cpus
= ms
->smp
.max_cpus
;
203 if (cpu
->env
.core_id
>= max_cpus
) {
204 error_setg(&err
, "Unable to add CPU with core-id: %" PRIu32
205 ", maximum core-id: %d", cpu
->env
.core_id
,
210 if (cpu_exists(cpu
->env
.core_id
)) {
211 error_setg(&err
, "Unable to add CPU with core-id: %" PRIu32
212 ", it already exists", cpu
->env
.core_id
);
216 /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
217 cs
->cpu_index
= cpu
->env
.core_id
;
220 cpu_exec_realizefn(cs
, &err
);
225 #if !defined(CONFIG_USER_ONLY)
226 qemu_register_reset(s390_cpu_machine_reset_cb
, cpu
);
228 s390_cpu_gdb_init(cs
);
232 * KVM requires the initial CPU reset ioctl to be executed on the target
233 * CPU thread. CPU hotplug under single-threaded TCG will not work with
234 * run_on_cpu(), as run_on_cpu() will not work properly if called while
235 * the main thread is already running but the CPU hasn't been realized.
238 run_on_cpu(cs
, s390_do_cpu_full_reset
, RUN_ON_CPU_NULL
);
243 scc
->parent_realize(dev
, &err
);
245 error_propagate(errp
, err
);
248 static GuestPanicInformation
*s390_cpu_get_crash_info(CPUState
*cs
)
250 GuestPanicInformation
*panic_info
;
251 S390CPU
*cpu
= S390_CPU(cs
);
253 cpu_synchronize_state(cs
);
254 panic_info
= g_malloc0(sizeof(GuestPanicInformation
));
256 panic_info
->type
= GUEST_PANIC_INFORMATION_TYPE_S390
;
257 #if !defined(CONFIG_USER_ONLY)
258 panic_info
->u
.s390
.core
= cpu
->env
.core_id
;
260 panic_info
->u
.s390
.core
= 0; /* sane default for non system emulation */
262 panic_info
->u
.s390
.psw_mask
= cpu
->env
.psw
.mask
;
263 panic_info
->u
.s390
.psw_addr
= cpu
->env
.psw
.addr
;
264 panic_info
->u
.s390
.reason
= cpu
->env
.crash_reason
;
269 static void s390_cpu_get_crash_info_qom(Object
*obj
, Visitor
*v
,
270 const char *name
, void *opaque
,
273 CPUState
*cs
= CPU(obj
);
274 GuestPanicInformation
*panic_info
;
276 if (!cs
->crash_occurred
) {
277 error_setg(errp
, "No crash occurred");
281 panic_info
= s390_cpu_get_crash_info(cs
);
283 visit_type_GuestPanicInformation(v
, "crash-information", &panic_info
,
285 qapi_free_GuestPanicInformation(panic_info
);
288 static void s390_cpu_initfn(Object
*obj
)
290 CPUState
*cs
= CPU(obj
);
291 S390CPU
*cpu
= S390_CPU(obj
);
293 cpu_set_cpustate_pointers(cpu
);
295 cs
->exception_index
= EXCP_HLT
;
296 object_property_add(obj
, "crash-information", "GuestPanicInformation",
297 s390_cpu_get_crash_info_qom
, NULL
, NULL
, NULL
, NULL
);
298 s390_cpu_model_register_props(obj
);
299 #if !defined(CONFIG_USER_ONLY)
301 timer_new_ns(QEMU_CLOCK_VIRTUAL
, s390x_tod_timer
, cpu
);
303 timer_new_ns(QEMU_CLOCK_VIRTUAL
, s390x_cpu_timer
, cpu
);
304 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
308 static void s390_cpu_finalize(Object
*obj
)
310 #if !defined(CONFIG_USER_ONLY)
311 S390CPU
*cpu
= S390_CPU(obj
);
313 qemu_unregister_reset(s390_cpu_machine_reset_cb
, cpu
);
314 g_free(cpu
->irqstate
);
318 #if !defined(CONFIG_USER_ONLY)
319 static bool disabled_wait(CPUState
*cpu
)
321 return cpu
->halted
&& !(S390_CPU(cpu
)->env
.psw
.mask
&
322 (PSW_MASK_IO
| PSW_MASK_EXT
| PSW_MASK_MCHECK
));
325 static unsigned s390_count_running_cpus(void)
331 uint8_t state
= S390_CPU(cpu
)->env
.cpu_state
;
332 if (state
== S390_CPU_STATE_OPERATING
||
333 state
== S390_CPU_STATE_LOAD
) {
334 if (!disabled_wait(cpu
)) {
343 unsigned int s390_cpu_halt(S390CPU
*cpu
)
345 CPUState
*cs
= CPU(cpu
);
346 trace_cpu_halt(cs
->cpu_index
);
350 cs
->exception_index
= EXCP_HLT
;
353 return s390_count_running_cpus();
356 void s390_cpu_unhalt(S390CPU
*cpu
)
358 CPUState
*cs
= CPU(cpu
);
359 trace_cpu_unhalt(cs
->cpu_index
);
363 cs
->exception_index
= -1;
367 unsigned int s390_cpu_set_state(uint8_t cpu_state
, S390CPU
*cpu
)
369 trace_cpu_set_state(CPU(cpu
)->cpu_index
, cpu_state
);
372 case S390_CPU_STATE_STOPPED
:
373 case S390_CPU_STATE_CHECK_STOP
:
374 /* halt the cpu for common infrastructure */
377 case S390_CPU_STATE_OPERATING
:
378 case S390_CPU_STATE_LOAD
:
380 * Starting a CPU with a PSW WAIT bit set:
381 * KVM: handles this internally and triggers another WAIT exit.
382 * TCG: will actually try to continue to run. Don't unhalt, will
383 * be done when the CPU actually has work (an interrupt).
385 if (!tcg_enabled() || !(cpu
->env
.psw
.mask
& PSW_MASK_WAIT
)) {
386 s390_cpu_unhalt(cpu
);
390 error_report("Requested CPU state is not a valid S390 CPU state: %u",
394 if (kvm_enabled() && cpu
->env
.cpu_state
!= cpu_state
) {
395 kvm_s390_set_cpu_state(cpu
, cpu_state
);
397 cpu
->env
.cpu_state
= cpu_state
;
399 return s390_count_running_cpus();
402 int s390_set_memory_limit(uint64_t new_limit
, uint64_t *hw_limit
)
405 return kvm_s390_set_mem_limit(new_limit
, hw_limit
);
410 void s390_set_max_pagesize(uint64_t pagesize
, Error
**errp
)
413 kvm_s390_set_max_pagesize(pagesize
, errp
);
417 void s390_cmma_reset(void)
420 kvm_s390_cmma_reset();
424 int s390_assign_subch_ioeventfd(EventNotifier
*notifier
, uint32_t sch_id
,
428 return kvm_s390_assign_subch_ioeventfd(notifier
, sch_id
, vq
, assign
);
434 void s390_crypto_reset(void)
437 kvm_s390_crypto_reset();
441 void s390_enable_css_support(S390CPU
*cpu
)
444 kvm_s390_enable_css_support(cpu
);
449 static gchar
*s390_gdb_arch_name(CPUState
*cs
)
451 return g_strdup("s390:64-bit");
454 static Property s390x_cpu_properties
[] = {
455 #if !defined(CONFIG_USER_ONLY)
456 DEFINE_PROP_UINT32("core-id", S390CPU
, env
.core_id
, 0),
458 DEFINE_PROP_END_OF_LIST()
461 static void s390_cpu_class_init(ObjectClass
*oc
, void *data
)
463 S390CPUClass
*scc
= S390_CPU_CLASS(oc
);
464 CPUClass
*cc
= CPU_CLASS(scc
);
465 DeviceClass
*dc
= DEVICE_CLASS(oc
);
467 device_class_set_parent_realize(dc
, s390_cpu_realizefn
,
468 &scc
->parent_realize
);
469 dc
->props
= s390x_cpu_properties
;
470 dc
->user_creatable
= true;
472 scc
->parent_reset
= cc
->reset
;
473 #if !defined(CONFIG_USER_ONLY)
474 scc
->load_normal
= s390_cpu_load_normal
;
476 scc
->cpu_reset
= s390_cpu_reset
;
477 scc
->initial_cpu_reset
= s390_cpu_initial_reset
;
478 cc
->reset
= s390_cpu_full_reset
;
479 cc
->class_by_name
= s390_cpu_class_by_name
,
480 cc
->has_work
= s390_cpu_has_work
;
482 cc
->do_interrupt
= s390_cpu_do_interrupt
;
484 cc
->dump_state
= s390_cpu_dump_state
;
485 cc
->get_crash_info
= s390_cpu_get_crash_info
;
486 cc
->set_pc
= s390_cpu_set_pc
;
487 cc
->gdb_read_register
= s390_cpu_gdb_read_register
;
488 cc
->gdb_write_register
= s390_cpu_gdb_write_register
;
489 #ifndef CONFIG_USER_ONLY
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
;
502 cc
->tlb_fill
= s390_cpu_tlb_fill
;
505 cc
->gdb_num_core_regs
= S390_NUM_CORE_REGS
;
506 cc
->gdb_core_xml_file
= "s390x-core64.xml";
507 cc
->gdb_arch_name
= s390_gdb_arch_name
;
509 s390_cpu_model_class_register_props(oc
);
512 static const TypeInfo s390_cpu_type_info
= {
513 .name
= TYPE_S390_CPU
,
515 .instance_size
= sizeof(S390CPU
),
516 .instance_init
= s390_cpu_initfn
,
517 .instance_finalize
= s390_cpu_finalize
,
519 .class_size
= sizeof(S390CPUClass
),
520 .class_init
= s390_cpu_class_init
,
523 static void s390_cpu_register_types(void)
525 type_register_static(&s390_cpu_type_info
);
528 type_init(s390_cpu_register_types
)