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 "qemu-common.h"
30 #include "qemu/timer.h"
31 #include "qemu/error-report.h"
33 #include "qapi/visitor.h"
34 #include "qapi/qapi-visit-misc.h"
35 #include "qapi/qapi-visit-run-state.h"
36 #include "sysemu/hw_accel.h"
37 #include "hw/qdev-properties.h"
38 #ifndef CONFIG_USER_ONLY
40 #include "sysemu/arch_init.h"
41 #include "sysemu/sysemu.h"
43 #include "fpu/softfloat.h"
45 #define CR0_RESET 0xE0UL
46 #define CR14_RESET 0xC2000000UL;
48 static void s390_cpu_set_pc(CPUState
*cs
, vaddr value
)
50 S390CPU
*cpu
= S390_CPU(cs
);
52 cpu
->env
.psw
.addr
= value
;
55 static bool s390_cpu_has_work(CPUState
*cs
)
57 S390CPU
*cpu
= S390_CPU(cs
);
59 /* STOPPED cpus can never wake up */
60 if (s390_cpu_get_state(cpu
) != S390_CPU_STATE_LOAD
&&
61 s390_cpu_get_state(cpu
) != S390_CPU_STATE_OPERATING
) {
65 if (!(cs
->interrupt_request
& CPU_INTERRUPT_HARD
)) {
69 return s390_cpu_has_int(cpu
);
72 #if !defined(CONFIG_USER_ONLY)
73 /* S390CPUClass::load_normal() */
74 static void s390_cpu_load_normal(CPUState
*s
)
76 S390CPU
*cpu
= S390_CPU(s
);
77 cpu
->env
.psw
.addr
= ldl_phys(s
->as
, 4) & PSW_MASK_ESA_ADDR
;
78 cpu
->env
.psw
.mask
= PSW_MASK_32
| PSW_MASK_64
;
79 s390_cpu_set_state(S390_CPU_STATE_OPERATING
, cpu
);
83 /* S390CPUClass::cpu_reset() */
84 static void s390_cpu_reset(CPUState
*s
)
86 S390CPU
*cpu
= S390_CPU(s
);
87 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
88 CPUS390XState
*env
= &cpu
->env
;
90 env
->pfault_token
= -1UL;
93 cpu
->env
.sigp_order
= 0;
94 s390_cpu_set_state(S390_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
;
104 /* initial reset does not clear everything! */
105 memset(&env
->start_initial_reset_fields
, 0,
106 offsetof(CPUS390XState
, end_reset_fields
) -
107 offsetof(CPUS390XState
, start_initial_reset_fields
));
109 /* architectured initial values for CR 0 and 14 */
110 env
->cregs
[0] = CR0_RESET
;
111 env
->cregs
[14] = CR14_RESET
;
113 /* architectured initial value for Breaking-Event-Address register */
116 env
->pfault_token
= -1UL;
118 /* tininess for underflow is detected before rounding */
119 set_float_detect_tininess(float_tininess_before_rounding
,
122 /* Reset state inside the kernel that we cannot access yet from QEMU. */
124 kvm_s390_reset_vcpu(cpu
);
128 /* CPUClass:reset() */
129 static void s390_cpu_full_reset(CPUState
*s
)
131 S390CPU
*cpu
= S390_CPU(s
);
132 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
133 CPUS390XState
*env
= &cpu
->env
;
135 scc
->parent_reset(s
);
136 cpu
->env
.sigp_order
= 0;
137 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
139 memset(env
, 0, offsetof(CPUS390XState
, end_reset_fields
));
141 /* architectured initial values for CR 0 and 14 */
142 env
->cregs
[0] = CR0_RESET
;
143 env
->cregs
[14] = CR14_RESET
;
145 #if defined(CONFIG_USER_ONLY)
146 /* user mode should always be allowed to use the full FPU */
147 env
->cregs
[0] |= CR0_AFP
;
148 if (s390_has_feat(S390_FEAT_VECTOR
)) {
149 env
->cregs
[0] |= CR0_VECTOR
;
153 /* architectured initial value for Breaking-Event-Address register */
156 env
->pfault_token
= -1UL;
158 /* tininess for underflow is detected before rounding */
159 set_float_detect_tininess(float_tininess_before_rounding
,
162 /* Reset state inside the kernel that we cannot access yet from QEMU. */
164 kvm_s390_reset_vcpu(cpu
);
168 #if !defined(CONFIG_USER_ONLY)
169 static void s390_cpu_machine_reset_cb(void *opaque
)
171 S390CPU
*cpu
= opaque
;
173 run_on_cpu(CPU(cpu
), s390_do_cpu_full_reset
, RUN_ON_CPU_NULL
);
177 static void s390_cpu_disas_set_info(CPUState
*cpu
, disassemble_info
*info
)
179 info
->mach
= bfd_mach_s390_64
;
180 info
->print_insn
= print_insn_s390
;
183 static void s390_cpu_realizefn(DeviceState
*dev
, Error
**errp
)
185 CPUState
*cs
= CPU(dev
);
186 S390CPUClass
*scc
= S390_CPU_GET_CLASS(dev
);
187 #if !defined(CONFIG_USER_ONLY)
188 S390CPU
*cpu
= S390_CPU(dev
);
192 /* the model has to be realized before qemu_init_vcpu() due to kvm */
193 s390_realize_cpu_model(cs
, &err
);
198 #if !defined(CONFIG_USER_ONLY)
199 if (cpu
->env
.core_id
>= max_cpus
) {
200 error_setg(&err
, "Unable to add CPU with core-id: %" PRIu32
201 ", maximum core-id: %d", cpu
->env
.core_id
,
206 if (cpu_exists(cpu
->env
.core_id
)) {
207 error_setg(&err
, "Unable to add CPU with core-id: %" PRIu32
208 ", it already exists", cpu
->env
.core_id
);
212 /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
213 cs
->cpu_index
= cpu
->env
.core_id
;
216 cpu_exec_realizefn(cs
, &err
);
221 #if !defined(CONFIG_USER_ONLY)
222 qemu_register_reset(s390_cpu_machine_reset_cb
, cpu
);
224 s390_cpu_gdb_init(cs
);
228 * KVM requires the initial CPU reset ioctl to be executed on the target
229 * CPU thread. CPU hotplug under single-threaded TCG will not work with
230 * run_on_cpu(), as run_on_cpu() will not work properly if called while
231 * the main thread is already running but the CPU hasn't been realized.
234 run_on_cpu(cs
, s390_do_cpu_full_reset
, RUN_ON_CPU_NULL
);
239 scc
->parent_realize(dev
, &err
);
241 error_propagate(errp
, err
);
244 static GuestPanicInformation
*s390_cpu_get_crash_info(CPUState
*cs
)
246 GuestPanicInformation
*panic_info
;
247 S390CPU
*cpu
= S390_CPU(cs
);
249 cpu_synchronize_state(cs
);
250 panic_info
= g_malloc0(sizeof(GuestPanicInformation
));
252 panic_info
->type
= GUEST_PANIC_INFORMATION_TYPE_S390
;
253 #if !defined(CONFIG_USER_ONLY)
254 panic_info
->u
.s390
.core
= cpu
->env
.core_id
;
256 panic_info
->u
.s390
.core
= 0; /* sane default for non system emulation */
258 panic_info
->u
.s390
.psw_mask
= cpu
->env
.psw
.mask
;
259 panic_info
->u
.s390
.psw_addr
= cpu
->env
.psw
.addr
;
260 panic_info
->u
.s390
.reason
= cpu
->env
.crash_reason
;
265 static void s390_cpu_get_crash_info_qom(Object
*obj
, Visitor
*v
,
266 const char *name
, void *opaque
,
269 CPUState
*cs
= CPU(obj
);
270 GuestPanicInformation
*panic_info
;
272 if (!cs
->crash_occurred
) {
273 error_setg(errp
, "No crash occurred");
277 panic_info
= s390_cpu_get_crash_info(cs
);
279 visit_type_GuestPanicInformation(v
, "crash-information", &panic_info
,
281 qapi_free_GuestPanicInformation(panic_info
);
284 static void s390_cpu_initfn(Object
*obj
)
286 CPUState
*cs
= CPU(obj
);
287 S390CPU
*cpu
= S390_CPU(obj
);
289 cpu_set_cpustate_pointers(cpu
);
291 cs
->exception_index
= EXCP_HLT
;
292 object_property_add(obj
, "crash-information", "GuestPanicInformation",
293 s390_cpu_get_crash_info_qom
, NULL
, NULL
, NULL
, NULL
);
294 s390_cpu_model_register_props(obj
);
295 #if !defined(CONFIG_USER_ONLY)
297 timer_new_ns(QEMU_CLOCK_VIRTUAL
, s390x_tod_timer
, cpu
);
299 timer_new_ns(QEMU_CLOCK_VIRTUAL
, s390x_cpu_timer
, cpu
);
300 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
304 static void s390_cpu_finalize(Object
*obj
)
306 #if !defined(CONFIG_USER_ONLY)
307 S390CPU
*cpu
= S390_CPU(obj
);
309 qemu_unregister_reset(s390_cpu_machine_reset_cb
, cpu
);
310 g_free(cpu
->irqstate
);
314 #if !defined(CONFIG_USER_ONLY)
315 static bool disabled_wait(CPUState
*cpu
)
317 return cpu
->halted
&& !(S390_CPU(cpu
)->env
.psw
.mask
&
318 (PSW_MASK_IO
| PSW_MASK_EXT
| PSW_MASK_MCHECK
));
321 static unsigned s390_count_running_cpus(void)
327 uint8_t state
= S390_CPU(cpu
)->env
.cpu_state
;
328 if (state
== S390_CPU_STATE_OPERATING
||
329 state
== S390_CPU_STATE_LOAD
) {
330 if (!disabled_wait(cpu
)) {
339 unsigned int s390_cpu_halt(S390CPU
*cpu
)
341 CPUState
*cs
= CPU(cpu
);
342 trace_cpu_halt(cs
->cpu_index
);
346 cs
->exception_index
= EXCP_HLT
;
349 return s390_count_running_cpus();
352 void s390_cpu_unhalt(S390CPU
*cpu
)
354 CPUState
*cs
= CPU(cpu
);
355 trace_cpu_unhalt(cs
->cpu_index
);
359 cs
->exception_index
= -1;
363 unsigned int s390_cpu_set_state(uint8_t cpu_state
, S390CPU
*cpu
)
365 trace_cpu_set_state(CPU(cpu
)->cpu_index
, cpu_state
);
368 case S390_CPU_STATE_STOPPED
:
369 case S390_CPU_STATE_CHECK_STOP
:
370 /* halt the cpu for common infrastructure */
373 case S390_CPU_STATE_OPERATING
:
374 case S390_CPU_STATE_LOAD
:
376 * Starting a CPU with a PSW WAIT bit set:
377 * KVM: handles this internally and triggers another WAIT exit.
378 * TCG: will actually try to continue to run. Don't unhalt, will
379 * be done when the CPU actually has work (an interrupt).
381 if (!tcg_enabled() || !(cpu
->env
.psw
.mask
& PSW_MASK_WAIT
)) {
382 s390_cpu_unhalt(cpu
);
386 error_report("Requested CPU state is not a valid S390 CPU state: %u",
390 if (kvm_enabled() && cpu
->env
.cpu_state
!= cpu_state
) {
391 kvm_s390_set_cpu_state(cpu
, cpu_state
);
393 cpu
->env
.cpu_state
= cpu_state
;
395 return s390_count_running_cpus();
398 int s390_set_memory_limit(uint64_t new_limit
, uint64_t *hw_limit
)
401 return kvm_s390_set_mem_limit(new_limit
, hw_limit
);
406 void s390_set_max_pagesize(uint64_t pagesize
, Error
**errp
)
409 kvm_s390_set_max_pagesize(pagesize
, errp
);
413 void s390_cmma_reset(void)
416 kvm_s390_cmma_reset();
420 int s390_assign_subch_ioeventfd(EventNotifier
*notifier
, uint32_t sch_id
,
424 return kvm_s390_assign_subch_ioeventfd(notifier
, sch_id
, vq
, assign
);
430 void s390_crypto_reset(void)
433 kvm_s390_crypto_reset();
437 void s390_enable_css_support(S390CPU
*cpu
)
440 kvm_s390_enable_css_support(cpu
);
445 static gchar
*s390_gdb_arch_name(CPUState
*cs
)
447 return g_strdup("s390:64-bit");
450 static Property s390x_cpu_properties
[] = {
451 #if !defined(CONFIG_USER_ONLY)
452 DEFINE_PROP_UINT32("core-id", S390CPU
, env
.core_id
, 0),
454 DEFINE_PROP_END_OF_LIST()
457 static void s390_cpu_class_init(ObjectClass
*oc
, void *data
)
459 S390CPUClass
*scc
= S390_CPU_CLASS(oc
);
460 CPUClass
*cc
= CPU_CLASS(scc
);
461 DeviceClass
*dc
= DEVICE_CLASS(oc
);
463 device_class_set_parent_realize(dc
, s390_cpu_realizefn
,
464 &scc
->parent_realize
);
465 dc
->props
= s390x_cpu_properties
;
466 dc
->user_creatable
= true;
468 scc
->parent_reset
= cc
->reset
;
469 #if !defined(CONFIG_USER_ONLY)
470 scc
->load_normal
= s390_cpu_load_normal
;
472 scc
->cpu_reset
= s390_cpu_reset
;
473 scc
->initial_cpu_reset
= s390_cpu_initial_reset
;
474 cc
->reset
= s390_cpu_full_reset
;
475 cc
->class_by_name
= s390_cpu_class_by_name
,
476 cc
->has_work
= s390_cpu_has_work
;
478 cc
->do_interrupt
= s390_cpu_do_interrupt
;
480 cc
->dump_state
= s390_cpu_dump_state
;
481 cc
->get_crash_info
= s390_cpu_get_crash_info
;
482 cc
->set_pc
= s390_cpu_set_pc
;
483 cc
->gdb_read_register
= s390_cpu_gdb_read_register
;
484 cc
->gdb_write_register
= s390_cpu_gdb_write_register
;
485 #ifndef CONFIG_USER_ONLY
486 cc
->get_phys_page_debug
= s390_cpu_get_phys_page_debug
;
487 cc
->vmsd
= &vmstate_s390_cpu
;
488 cc
->write_elf64_note
= s390_cpu_write_elf64_note
;
490 cc
->cpu_exec_interrupt
= s390_cpu_exec_interrupt
;
491 cc
->debug_excp_handler
= s390x_cpu_debug_excp_handler
;
492 cc
->do_unaligned_access
= s390x_cpu_do_unaligned_access
;
495 cc
->disas_set_info
= s390_cpu_disas_set_info
;
497 cc
->tcg_initialize
= s390x_translate_init
;
498 cc
->tlb_fill
= s390_cpu_tlb_fill
;
501 cc
->gdb_num_core_regs
= S390_NUM_CORE_REGS
;
502 cc
->gdb_core_xml_file
= "s390x-core64.xml";
503 cc
->gdb_arch_name
= s390_gdb_arch_name
;
505 s390_cpu_model_class_register_props(oc
);
508 static const TypeInfo s390_cpu_type_info
= {
509 .name
= TYPE_S390_CPU
,
511 .instance_size
= sizeof(S390CPU
),
512 .instance_init
= s390_cpu_initfn
,
513 .instance_finalize
= s390_cpu_finalize
,
515 .class_size
= sizeof(S390CPUClass
),
516 .class_init
= s390_cpu_class_init
,
519 static void s390_cpu_register_types(void)
521 type_register_static(&s390_cpu_type_info
);
524 type_init(s390_cpu_register_types
)