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 #ifndef CONFIG_USER_ONLY
45 static bool is_early_exception_psw(uint64_t mask
, uint64_t addr
)
47 if (mask
& PSW_MASK_RESERVED
) {
51 switch (mask
& (PSW_MASK_32
| PSW_MASK_64
)) {
53 return addr
& ~0xffffffULL
;
55 return addr
& ~0x7fffffffULL
;
56 case PSW_MASK_32
| PSW_MASK_64
:
58 default: /* PSW_MASK_64 */
64 void s390_cpu_set_psw(CPUS390XState
*env
, uint64_t mask
, uint64_t addr
)
66 #ifndef CONFIG_USER_ONLY
67 uint64_t old_mask
= env
->psw
.mask
;
73 /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
77 env
->cc_op
= (mask
>> 44) & 3;
79 #ifndef CONFIG_USER_ONLY
80 if (is_early_exception_psw(mask
, addr
)) {
81 env
->int_pgm_ilen
= 0;
82 trigger_pgm_exception(env
, PGM_SPECIFICATION
);
86 if ((old_mask
^ mask
) & PSW_MASK_PER
) {
87 s390_cpu_recompute_watchpoints(env_cpu(env
));
90 if (mask
& PSW_MASK_WAIT
) {
91 s390_handle_wait(env_archcpu(env
));
96 uint64_t s390_cpu_get_psw_mask(CPUS390XState
*env
)
98 uint64_t r
= env
->psw
.mask
;
101 uint64_t cc
= calc_cc(env
, env
->cc_op
, env
->cc_src
,
102 env
->cc_dst
, env
->cc_vr
);
112 static void s390_cpu_set_pc(CPUState
*cs
, vaddr value
)
114 S390CPU
*cpu
= S390_CPU(cs
);
116 cpu
->env
.psw
.addr
= value
;
119 static vaddr
s390_cpu_get_pc(CPUState
*cs
)
121 S390CPU
*cpu
= S390_CPU(cs
);
123 return cpu
->env
.psw
.addr
;
126 static bool s390_cpu_has_work(CPUState
*cs
)
128 S390CPU
*cpu
= S390_CPU(cs
);
130 /* STOPPED cpus can never wake up */
131 if (s390_cpu_get_state(cpu
) != S390_CPU_STATE_LOAD
&&
132 s390_cpu_get_state(cpu
) != S390_CPU_STATE_OPERATING
) {
136 if (!(cs
->interrupt_request
& CPU_INTERRUPT_HARD
)) {
140 return s390_cpu_has_int(cpu
);
143 static void s390_query_cpu_fast(CPUState
*cpu
, CpuInfoFast
*value
)
145 S390CPU
*s390_cpu
= S390_CPU(cpu
);
147 value
->u
.s390x
.cpu_state
= s390_cpu
->env
.cpu_state
;
150 /* S390CPUClass::reset() */
151 static void s390_cpu_reset(CPUState
*s
, cpu_reset_type type
)
153 S390CPU
*cpu
= S390_CPU(s
);
154 S390CPUClass
*scc
= S390_CPU_GET_CLASS(cpu
);
155 CPUS390XState
*env
= &cpu
->env
;
156 DeviceState
*dev
= DEVICE(s
);
158 scc
->parent_reset(dev
);
159 cpu
->env
.sigp_order
= 0;
160 s390_cpu_set_state(S390_CPU_STATE_STOPPED
, cpu
);
163 case S390_CPU_RESET_CLEAR
:
164 memset(env
, 0, offsetof(CPUS390XState
, start_initial_reset_fields
));
166 case S390_CPU_RESET_INITIAL
:
167 /* initial reset does not clear everything! */
168 memset(&env
->start_initial_reset_fields
, 0,
169 offsetof(CPUS390XState
, start_normal_reset_fields
) -
170 offsetof(CPUS390XState
, start_initial_reset_fields
));
172 /* architectured initial value for Breaking-Event-Address register */
175 /* architectured initial values for CR 0 and 14 */
176 env
->cregs
[0] = CR0_RESET
;
177 env
->cregs
[14] = CR14_RESET
;
179 #if defined(CONFIG_USER_ONLY)
180 /* user mode should always be allowed to use the full FPU */
181 env
->cregs
[0] |= CR0_AFP
;
182 if (s390_has_feat(S390_FEAT_VECTOR
)) {
183 env
->cregs
[0] |= CR0_VECTOR
;
187 /* tininess for underflow is detected before rounding */
188 set_float_detect_tininess(float_tininess_before_rounding
,
191 case S390_CPU_RESET_NORMAL
:
192 env
->psw
.mask
&= ~PSW_MASK_RI
;
193 memset(&env
->start_normal_reset_fields
, 0,
194 offsetof(CPUS390XState
, end_reset_fields
) -
195 offsetof(CPUS390XState
, start_normal_reset_fields
));
197 env
->pfault_token
= -1UL;
201 g_assert_not_reached();
204 /* Reset state inside the kernel that we cannot access yet from QEMU. */
207 case S390_CPU_RESET_CLEAR
:
208 kvm_s390_reset_vcpu_clear(cpu
);
210 case S390_CPU_RESET_INITIAL
:
211 kvm_s390_reset_vcpu_initial(cpu
);
213 case S390_CPU_RESET_NORMAL
:
214 kvm_s390_reset_vcpu_normal(cpu
);
220 static void s390_cpu_disas_set_info(CPUState
*cpu
, disassemble_info
*info
)
222 info
->mach
= bfd_mach_s390_64
;
223 info
->cap_arch
= CS_ARCH_SYSZ
;
224 info
->cap_insn_unit
= 2;
225 info
->cap_insn_split
= 6;
228 static void s390_cpu_realizefn(DeviceState
*dev
, Error
**errp
)
230 CPUState
*cs
= CPU(dev
);
231 S390CPUClass
*scc
= S390_CPU_GET_CLASS(dev
);
234 /* the model has to be realized before qemu_init_vcpu() due to kvm */
235 s390_realize_cpu_model(cs
, &err
);
240 #if !defined(CONFIG_USER_ONLY)
241 if (!s390_cpu_realize_sysemu(dev
, &err
)) {
246 cpu_exec_realizefn(cs
, &err
);
251 #if !defined(CONFIG_USER_ONLY)
252 qemu_register_reset(s390_cpu_machine_reset_cb
, S390_CPU(dev
));
254 s390_cpu_gdb_init(cs
);
258 * KVM requires the initial CPU reset ioctl to be executed on the target
259 * CPU thread. CPU hotplug under single-threaded TCG will not work with
260 * run_on_cpu(), as run_on_cpu() will not work properly if called while
261 * the main thread is already running but the CPU hasn't been realized.
264 run_on_cpu(cs
, s390_do_cpu_full_reset
, RUN_ON_CPU_NULL
);
269 scc
->parent_realize(dev
, &err
);
271 error_propagate(errp
, err
);
274 static void s390_cpu_initfn(Object
*obj
)
276 CPUState
*cs
= CPU(obj
);
278 cs
->exception_index
= EXCP_HLT
;
280 #if !defined(CONFIG_USER_ONLY)
281 s390_cpu_init_sysemu(obj
);
285 static gchar
*s390_gdb_arch_name(CPUState
*cs
)
287 return g_strdup("s390:64-bit");
290 static Property s390x_cpu_properties
[] = {
291 #if !defined(CONFIG_USER_ONLY)
292 DEFINE_PROP_UINT32("core-id", S390CPU
, env
.core_id
, 0),
294 DEFINE_PROP_END_OF_LIST()
297 static void s390_cpu_reset_full(DeviceState
*dev
)
299 CPUState
*s
= CPU(dev
);
300 return s390_cpu_reset(s
, S390_CPU_RESET_CLEAR
);
304 #include "hw/core/tcg-cpu-ops.h"
306 static const struct TCGCPUOps s390_tcg_ops
= {
307 .initialize
= s390x_translate_init
,
308 .restore_state_to_opc
= s390x_restore_state_to_opc
,
310 #ifdef CONFIG_USER_ONLY
311 .record_sigsegv
= s390_cpu_record_sigsegv
,
312 .record_sigbus
= s390_cpu_record_sigbus
,
314 .tlb_fill
= s390_cpu_tlb_fill
,
315 .cpu_exec_interrupt
= s390_cpu_exec_interrupt
,
316 .do_interrupt
= s390_cpu_do_interrupt
,
317 .debug_excp_handler
= s390x_cpu_debug_excp_handler
,
318 .do_unaligned_access
= s390x_cpu_do_unaligned_access
,
319 #endif /* !CONFIG_USER_ONLY */
321 #endif /* CONFIG_TCG */
323 static void s390_cpu_class_init(ObjectClass
*oc
, void *data
)
325 S390CPUClass
*scc
= S390_CPU_CLASS(oc
);
326 CPUClass
*cc
= CPU_CLASS(scc
);
327 DeviceClass
*dc
= DEVICE_CLASS(oc
);
329 device_class_set_parent_realize(dc
, s390_cpu_realizefn
,
330 &scc
->parent_realize
);
331 device_class_set_props(dc
, s390x_cpu_properties
);
332 dc
->user_creatable
= true;
334 device_class_set_parent_reset(dc
, s390_cpu_reset_full
, &scc
->parent_reset
);
336 scc
->reset
= s390_cpu_reset
;
337 cc
->class_by_name
= s390_cpu_class_by_name
,
338 cc
->has_work
= s390_cpu_has_work
;
339 cc
->dump_state
= s390_cpu_dump_state
;
340 cc
->query_cpu_fast
= s390_query_cpu_fast
;
341 cc
->set_pc
= s390_cpu_set_pc
;
342 cc
->get_pc
= s390_cpu_get_pc
;
343 cc
->gdb_read_register
= s390_cpu_gdb_read_register
;
344 cc
->gdb_write_register
= s390_cpu_gdb_write_register
;
345 #ifndef CONFIG_USER_ONLY
346 s390_cpu_class_init_sysemu(cc
);
348 cc
->disas_set_info
= s390_cpu_disas_set_info
;
349 cc
->gdb_num_core_regs
= S390_NUM_CORE_REGS
;
350 cc
->gdb_core_xml_file
= "s390x-core64.xml";
351 cc
->gdb_arch_name
= s390_gdb_arch_name
;
353 s390_cpu_model_class_register_props(oc
);
356 cc
->tcg_ops
= &s390_tcg_ops
;
357 #endif /* CONFIG_TCG */
360 static const TypeInfo s390_cpu_type_info
= {
361 .name
= TYPE_S390_CPU
,
363 .instance_size
= sizeof(S390CPU
),
364 .instance_align
= __alignof__(S390CPU
),
365 .instance_init
= s390_cpu_initfn
,
367 #ifndef CONFIG_USER_ONLY
368 .instance_finalize
= s390_cpu_finalize
,
369 #endif /* !CONFIG_USER_ONLY */
372 .class_size
= sizeof(S390CPUClass
),
373 .class_init
= s390_cpu_class_init
,
376 static void s390_cpu_register_types(void)
378 type_register_static(&s390_cpu_type_info
);
381 type_init(s390_cpu_register_types
)