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"
26 #include "s390x-internal.h"
27 #include "kvm/kvm_s390x.h"
28 #include "sysemu/kvm.h"
29 #include "qemu/module.h"
31 #include "qapi/qapi-types-machine.h"
32 #include "sysemu/hw_accel.h"
33 #include "hw/qdev-properties.h"
34 #include "fpu/softfloat-helpers.h"
35 #include "disas/capstone.h"
36 #include "sysemu/tcg.h"
37 #ifndef CONFIG_USER_ONLY
38 #include "sysemu/reset.h"
41 #define CR0_RESET 0xE0UL
42 #define CR14_RESET 0xC2000000UL;
44 void s390_cpu_set_psw(CPUS390XState
*env
, uint64_t mask
, uint64_t addr
)
46 #ifndef CONFIG_USER_ONLY
47 uint64_t old_mask
= env
->psw
.mask
;
53 /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
57 env
->cc_op
= (mask
>> 44) & 3;
59 #ifndef CONFIG_USER_ONLY
60 if ((old_mask
^ mask
) & PSW_MASK_PER
) {
61 s390_cpu_recompute_watchpoints(env_cpu(env
));
64 if (mask
& PSW_MASK_WAIT
) {
65 s390_handle_wait(env_archcpu(env
));
70 uint64_t s390_cpu_get_psw_mask(CPUS390XState
*env
)
72 uint64_t r
= env
->psw
.mask
;
75 uint64_t cc
= calc_cc(env
, env
->cc_op
, env
->cc_src
,
76 env
->cc_dst
, env
->cc_vr
);
86 static void s390_cpu_set_pc(CPUState
*cs
, vaddr value
)
88 S390CPU
*cpu
= S390_CPU(cs
);
90 cpu
->env
.psw
.addr
= value
;
93 static vaddr
s390_cpu_get_pc(CPUState
*cs
)
95 S390CPU
*cpu
= S390_CPU(cs
);
97 return cpu
->env
.psw
.addr
;
100 static bool s390_cpu_has_work(CPUState
*cs
)
102 S390CPU
*cpu
= S390_CPU(cs
);
104 /* STOPPED cpus can never wake up */
105 if (s390_cpu_get_state(cpu
) != S390_CPU_STATE_LOAD
&&
106 s390_cpu_get_state(cpu
) != S390_CPU_STATE_OPERATING
) {
110 if (!(cs
->interrupt_request
& CPU_INTERRUPT_HARD
)) {
114 return s390_cpu_has_int(cpu
);
117 /* S390CPUClass::reset() */
118 static void s390_cpu_reset(CPUState
*s
, cpu_reset_type type
)
120 S390CPU
*cpu
= S390_CPU(s
);
121 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
122 CPUS390XState
*env
= &cpu
->env
;
123 DeviceState
*dev
= DEVICE(s
);
125 scc
->parent_reset(dev
);
126 cpu
->env
.sigp_order
= 0;
127 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
130 case S390_CPU_RESET_CLEAR
:
131 memset(env
, 0, offsetof(CPUS390XState
, start_initial_reset_fields
));
133 case S390_CPU_RESET_INITIAL
:
134 /* initial reset does not clear everything! */
135 memset(&env
->start_initial_reset_fields
, 0,
136 offsetof(CPUS390XState
, start_normal_reset_fields
) -
137 offsetof(CPUS390XState
, start_initial_reset_fields
));
139 /* architectured initial value for Breaking-Event-Address register */
142 /* architectured initial values for CR 0 and 14 */
143 env
->cregs
[0] = CR0_RESET
;
144 env
->cregs
[14] = CR14_RESET
;
146 #if defined(CONFIG_USER_ONLY)
147 /* user mode should always be allowed to use the full FPU */
148 env
->cregs
[0] |= CR0_AFP
;
149 if (s390_has_feat(S390_FEAT_VECTOR
)) {
150 env
->cregs
[0] |= CR0_VECTOR
;
154 /* tininess for underflow is detected before rounding */
155 set_float_detect_tininess(float_tininess_before_rounding
,
158 case S390_CPU_RESET_NORMAL
:
159 env
->psw
.mask
&= ~PSW_MASK_RI
;
160 memset(&env
->start_normal_reset_fields
, 0,
161 offsetof(CPUS390XState
, end_reset_fields
) -
162 offsetof(CPUS390XState
, start_normal_reset_fields
));
164 env
->pfault_token
= -1UL;
168 g_assert_not_reached();
171 /* Reset state inside the kernel that we cannot access yet from QEMU. */
174 case S390_CPU_RESET_CLEAR
:
175 kvm_s390_reset_vcpu_clear(cpu
);
177 case S390_CPU_RESET_INITIAL
:
178 kvm_s390_reset_vcpu_initial(cpu
);
180 case S390_CPU_RESET_NORMAL
:
181 kvm_s390_reset_vcpu_normal(cpu
);
187 static void s390_cpu_disas_set_info(CPUState
*cpu
, disassemble_info
*info
)
189 info
->mach
= bfd_mach_s390_64
;
190 info
->cap_arch
= CS_ARCH_SYSZ
;
191 info
->cap_insn_unit
= 2;
192 info
->cap_insn_split
= 6;
195 static void s390_cpu_realizefn(DeviceState
*dev
, Error
**errp
)
197 CPUState
*cs
= CPU(dev
);
198 S390CPUClass
*scc
= S390_CPU_GET_CLASS(dev
);
201 /* the model has to be realized before qemu_init_vcpu() due to kvm */
202 s390_realize_cpu_model(cs
, &err
);
207 #if !defined(CONFIG_USER_ONLY)
208 if (!s390_cpu_realize_sysemu(dev
, &err
)) {
213 cpu_exec_realizefn(cs
, &err
);
218 #if !defined(CONFIG_USER_ONLY)
219 qemu_register_reset(s390_cpu_machine_reset_cb
, S390_CPU(dev
));
221 s390_cpu_gdb_init(cs
);
225 * KVM requires the initial CPU reset ioctl to be executed on the target
226 * CPU thread. CPU hotplug under single-threaded TCG will not work with
227 * run_on_cpu(), as run_on_cpu() will not work properly if called while
228 * the main thread is already running but the CPU hasn't been realized.
231 run_on_cpu(cs
, s390_do_cpu_full_reset
, RUN_ON_CPU_NULL
);
236 scc
->parent_realize(dev
, &err
);
238 error_propagate(errp
, err
);
241 static void s390_cpu_initfn(Object
*obj
)
243 CPUState
*cs
= CPU(obj
);
244 S390CPU
*cpu
= S390_CPU(obj
);
246 cpu_set_cpustate_pointers(cpu
);
247 cs
->exception_index
= EXCP_HLT
;
249 #if !defined(CONFIG_USER_ONLY)
250 s390_cpu_init_sysemu(obj
);
254 static gchar
*s390_gdb_arch_name(CPUState
*cs
)
256 return g_strdup("s390:64-bit");
259 static Property s390x_cpu_properties
[] = {
260 #if !defined(CONFIG_USER_ONLY)
261 DEFINE_PROP_UINT32("core-id", S390CPU
, env
.core_id
, 0),
263 DEFINE_PROP_END_OF_LIST()
266 static void s390_cpu_reset_full(DeviceState
*dev
)
268 CPUState
*s
= CPU(dev
);
269 return s390_cpu_reset(s
, S390_CPU_RESET_CLEAR
);
273 #include "hw/core/tcg-cpu-ops.h"
275 static const struct TCGCPUOps s390_tcg_ops
= {
276 .initialize
= s390x_translate_init
,
277 .restore_state_to_opc
= s390x_restore_state_to_opc
,
279 #ifdef CONFIG_USER_ONLY
280 .record_sigsegv
= s390_cpu_record_sigsegv
,
281 .record_sigbus
= s390_cpu_record_sigbus
,
283 .tlb_fill
= s390_cpu_tlb_fill
,
284 .cpu_exec_interrupt
= s390_cpu_exec_interrupt
,
285 .do_interrupt
= s390_cpu_do_interrupt
,
286 .debug_excp_handler
= s390x_cpu_debug_excp_handler
,
287 .do_unaligned_access
= s390x_cpu_do_unaligned_access
,
288 #endif /* !CONFIG_USER_ONLY */
290 #endif /* CONFIG_TCG */
292 static void s390_cpu_class_init(ObjectClass
*oc
, void *data
)
294 S390CPUClass
*scc
= S390_CPU_CLASS(oc
);
295 CPUClass
*cc
= CPU_CLASS(scc
);
296 DeviceClass
*dc
= DEVICE_CLASS(oc
);
298 device_class_set_parent_realize(dc
, s390_cpu_realizefn
,
299 &scc
->parent_realize
);
300 device_class_set_props(dc
, s390x_cpu_properties
);
301 dc
->user_creatable
= true;
303 device_class_set_parent_reset(dc
, s390_cpu_reset_full
, &scc
->parent_reset
);
305 scc
->reset
= s390_cpu_reset
;
306 cc
->class_by_name
= s390_cpu_class_by_name
,
307 cc
->has_work
= s390_cpu_has_work
;
308 cc
->dump_state
= s390_cpu_dump_state
;
309 cc
->set_pc
= s390_cpu_set_pc
;
310 cc
->get_pc
= s390_cpu_get_pc
;
311 cc
->gdb_read_register
= s390_cpu_gdb_read_register
;
312 cc
->gdb_write_register
= s390_cpu_gdb_write_register
;
313 #ifndef CONFIG_USER_ONLY
314 s390_cpu_class_init_sysemu(cc
);
316 cc
->disas_set_info
= s390_cpu_disas_set_info
;
317 cc
->gdb_num_core_regs
= S390_NUM_CORE_REGS
;
318 cc
->gdb_core_xml_file
= "s390x-core64.xml";
319 cc
->gdb_arch_name
= s390_gdb_arch_name
;
321 s390_cpu_model_class_register_props(oc
);
324 cc
->tcg_ops
= &s390_tcg_ops
;
325 #endif /* CONFIG_TCG */
328 static const TypeInfo s390_cpu_type_info
= {
329 .name
= TYPE_S390_CPU
,
331 .instance_size
= sizeof(S390CPU
),
332 .instance_align
= __alignof__(S390CPU
),
333 .instance_init
= s390_cpu_initfn
,
335 #ifndef CONFIG_USER_ONLY
336 .instance_finalize
= s390_cpu_finalize
,
337 #endif /* !CONFIG_USER_ONLY */
340 .class_size
= sizeof(S390CPUClass
),
341 .class_init
= s390_cpu_class_init
,
344 static void s390_cpu_register_types(void)
346 type_register_static(&s390_cpu_type_info
);
349 type_init(s390_cpu_register_types
)