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 "sysemu/reset.h"
30 #include "qemu/module.h"
32 #include "qapi/qapi-types-machine.h"
33 #include "sysemu/hw_accel.h"
34 #include "hw/qdev-properties.h"
35 #include "fpu/softfloat-helpers.h"
36 #include "disas/capstone.h"
37 #include "sysemu/tcg.h"
39 #define CR0_RESET 0xE0UL
40 #define CR14_RESET 0xC2000000UL;
42 void s390_cpu_set_psw(CPUS390XState
*env
, uint64_t mask
, uint64_t addr
)
44 #ifndef CONFIG_USER_ONLY
45 uint64_t old_mask
= env
->psw
.mask
;
51 /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
55 env
->cc_op
= (mask
>> 44) & 3;
57 #ifndef CONFIG_USER_ONLY
58 if ((old_mask
^ mask
) & PSW_MASK_PER
) {
59 s390_cpu_recompute_watchpoints(env_cpu(env
));
62 if (mask
& PSW_MASK_WAIT
) {
63 s390_handle_wait(env_archcpu(env
));
68 uint64_t s390_cpu_get_psw_mask(CPUS390XState
*env
)
70 uint64_t r
= env
->psw
.mask
;
73 uint64_t cc
= calc_cc(env
, env
->cc_op
, env
->cc_src
,
74 env
->cc_dst
, env
->cc_vr
);
84 static void s390_cpu_set_pc(CPUState
*cs
, vaddr value
)
86 S390CPU
*cpu
= S390_CPU(cs
);
88 cpu
->env
.psw
.addr
= value
;
91 static vaddr
s390_cpu_get_pc(CPUState
*cs
)
93 S390CPU
*cpu
= S390_CPU(cs
);
95 return cpu
->env
.psw
.addr
;
98 static bool s390_cpu_has_work(CPUState
*cs
)
100 S390CPU
*cpu
= S390_CPU(cs
);
102 /* STOPPED cpus can never wake up */
103 if (s390_cpu_get_state(cpu
) != S390_CPU_STATE_LOAD
&&
104 s390_cpu_get_state(cpu
) != S390_CPU_STATE_OPERATING
) {
108 if (!(cs
->interrupt_request
& CPU_INTERRUPT_HARD
)) {
112 return s390_cpu_has_int(cpu
);
115 /* S390CPUClass::reset() */
116 static void s390_cpu_reset(CPUState
*s
, cpu_reset_type type
)
118 S390CPU
*cpu
= S390_CPU(s
);
119 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
120 CPUS390XState
*env
= &cpu
->env
;
121 DeviceState
*dev
= DEVICE(s
);
123 scc
->parent_reset(dev
);
124 cpu
->env
.sigp_order
= 0;
125 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
128 case S390_CPU_RESET_CLEAR
:
129 memset(env
, 0, offsetof(CPUS390XState
, start_initial_reset_fields
));
131 case S390_CPU_RESET_INITIAL
:
132 /* initial reset does not clear everything! */
133 memset(&env
->start_initial_reset_fields
, 0,
134 offsetof(CPUS390XState
, start_normal_reset_fields
) -
135 offsetof(CPUS390XState
, start_initial_reset_fields
));
137 /* architectured initial value for Breaking-Event-Address register */
140 /* architectured initial values for CR 0 and 14 */
141 env
->cregs
[0] = CR0_RESET
;
142 env
->cregs
[14] = CR14_RESET
;
144 #if defined(CONFIG_USER_ONLY)
145 /* user mode should always be allowed to use the full FPU */
146 env
->cregs
[0] |= CR0_AFP
;
147 if (s390_has_feat(S390_FEAT_VECTOR
)) {
148 env
->cregs
[0] |= CR0_VECTOR
;
152 /* tininess for underflow is detected before rounding */
153 set_float_detect_tininess(float_tininess_before_rounding
,
156 case S390_CPU_RESET_NORMAL
:
157 env
->psw
.mask
&= ~PSW_MASK_RI
;
158 memset(&env
->start_normal_reset_fields
, 0,
159 offsetof(CPUS390XState
, end_reset_fields
) -
160 offsetof(CPUS390XState
, start_normal_reset_fields
));
162 env
->pfault_token
= -1UL;
166 g_assert_not_reached();
169 /* Reset state inside the kernel that we cannot access yet from QEMU. */
172 case S390_CPU_RESET_CLEAR
:
173 kvm_s390_reset_vcpu_clear(cpu
);
175 case S390_CPU_RESET_INITIAL
:
176 kvm_s390_reset_vcpu_initial(cpu
);
178 case S390_CPU_RESET_NORMAL
:
179 kvm_s390_reset_vcpu_normal(cpu
);
185 static void s390_cpu_disas_set_info(CPUState
*cpu
, disassemble_info
*info
)
187 info
->mach
= bfd_mach_s390_64
;
188 info
->cap_arch
= CS_ARCH_SYSZ
;
189 info
->cap_insn_unit
= 2;
190 info
->cap_insn_split
= 6;
193 static void s390_cpu_realizefn(DeviceState
*dev
, Error
**errp
)
195 CPUState
*cs
= CPU(dev
);
196 S390CPUClass
*scc
= S390_CPU_GET_CLASS(dev
);
199 /* the model has to be realized before qemu_init_vcpu() due to kvm */
200 s390_realize_cpu_model(cs
, &err
);
205 #if !defined(CONFIG_USER_ONLY)
206 if (!s390_cpu_realize_sysemu(dev
, &err
)) {
211 cpu_exec_realizefn(cs
, &err
);
216 #if !defined(CONFIG_USER_ONLY)
217 qemu_register_reset(s390_cpu_machine_reset_cb
, S390_CPU(dev
));
219 s390_cpu_gdb_init(cs
);
223 * KVM requires the initial CPU reset ioctl to be executed on the target
224 * CPU thread. CPU hotplug under single-threaded TCG will not work with
225 * run_on_cpu(), as run_on_cpu() will not work properly if called while
226 * the main thread is already running but the CPU hasn't been realized.
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
);
244 cpu_set_cpustate_pointers(cpu
);
245 cs
->exception_index
= EXCP_HLT
;
247 #if !defined(CONFIG_USER_ONLY)
248 s390_cpu_init_sysemu(obj
);
252 static gchar
*s390_gdb_arch_name(CPUState
*cs
)
254 return g_strdup("s390:64-bit");
257 static Property s390x_cpu_properties
[] = {
258 #if !defined(CONFIG_USER_ONLY)
259 DEFINE_PROP_UINT32("core-id", S390CPU
, env
.core_id
, 0),
261 DEFINE_PROP_END_OF_LIST()
264 static void s390_cpu_reset_full(DeviceState
*dev
)
266 CPUState
*s
= CPU(dev
);
267 return s390_cpu_reset(s
, S390_CPU_RESET_CLEAR
);
271 #include "hw/core/tcg-cpu-ops.h"
273 static const struct TCGCPUOps s390_tcg_ops
= {
274 .initialize
= s390x_translate_init
,
276 #ifdef CONFIG_USER_ONLY
277 .record_sigsegv
= s390_cpu_record_sigsegv
,
278 .record_sigbus
= s390_cpu_record_sigbus
,
280 .tlb_fill
= s390_cpu_tlb_fill
,
281 .cpu_exec_interrupt
= s390_cpu_exec_interrupt
,
282 .do_interrupt
= s390_cpu_do_interrupt
,
283 .debug_excp_handler
= s390x_cpu_debug_excp_handler
,
284 .do_unaligned_access
= s390x_cpu_do_unaligned_access
,
285 #endif /* !CONFIG_USER_ONLY */
287 #endif /* CONFIG_TCG */
289 static void s390_cpu_class_init(ObjectClass
*oc
, void *data
)
291 S390CPUClass
*scc
= S390_CPU_CLASS(oc
);
292 CPUClass
*cc
= CPU_CLASS(scc
);
293 DeviceClass
*dc
= DEVICE_CLASS(oc
);
295 device_class_set_parent_realize(dc
, s390_cpu_realizefn
,
296 &scc
->parent_realize
);
297 device_class_set_props(dc
, s390x_cpu_properties
);
298 dc
->user_creatable
= true;
300 device_class_set_parent_reset(dc
, s390_cpu_reset_full
, &scc
->parent_reset
);
302 scc
->reset
= s390_cpu_reset
;
303 cc
->class_by_name
= s390_cpu_class_by_name
,
304 cc
->has_work
= s390_cpu_has_work
;
305 cc
->dump_state
= s390_cpu_dump_state
;
306 cc
->set_pc
= s390_cpu_set_pc
;
307 cc
->get_pc
= s390_cpu_get_pc
;
308 cc
->gdb_read_register
= s390_cpu_gdb_read_register
;
309 cc
->gdb_write_register
= s390_cpu_gdb_write_register
;
310 #ifndef CONFIG_USER_ONLY
311 s390_cpu_class_init_sysemu(cc
);
313 cc
->disas_set_info
= s390_cpu_disas_set_info
;
314 cc
->gdb_num_core_regs
= S390_NUM_CORE_REGS
;
315 cc
->gdb_core_xml_file
= "s390x-core64.xml";
316 cc
->gdb_arch_name
= s390_gdb_arch_name
;
318 s390_cpu_model_class_register_props(oc
);
321 cc
->tcg_ops
= &s390_tcg_ops
;
322 #endif /* CONFIG_TCG */
325 static const TypeInfo s390_cpu_type_info
= {
326 .name
= TYPE_S390_CPU
,
328 .instance_size
= sizeof(S390CPU
),
329 .instance_align
= __alignof__(S390CPU
),
330 .instance_init
= s390_cpu_initfn
,
332 #ifndef CONFIG_USER_ONLY
333 .instance_finalize
= s390_cpu_finalize
,
334 #endif /* !CONFIG_USER_ONLY */
337 .class_size
= sizeof(S390CPUClass
),
338 .class_init
= s390_cpu_class_init
,
341 static void s390_cpu_register_types(void)
343 type_register_static(&s390_cpu_type_info
);
346 type_init(s390_cpu_register_types
)