2 * Target-specific parts of the CPU object
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "qapi/error.h"
23 #include "exec/target_page.h"
24 #include "hw/qdev-core.h"
25 #include "hw/qdev-properties.h"
26 #include "qemu/error-report.h"
27 #include "migration/vmstate.h"
28 #ifdef CONFIG_USER_ONLY
31 #include "hw/core/sysemu-cpu-ops.h"
32 #include "exec/address-spaces.h"
34 #include "sysemu/cpus.h"
35 #include "sysemu/tcg.h"
36 #include "exec/replay-core.h"
37 #include "exec/cpu-common.h"
38 #include "exec/exec-all.h"
39 #include "exec/tb-flush.h"
40 #include "exec/translate-all.h"
42 #include "hw/core/accel-cpu.h"
43 #include "trace/trace-root.h"
44 #include "qemu/accel.h"
45 #include "qemu/plugin.h"
47 uintptr_t qemu_host_page_size
;
48 intptr_t qemu_host_page_mask
;
50 #ifndef CONFIG_USER_ONLY
51 static int cpu_common_post_load(void *opaque
, int version_id
)
53 CPUState
*cpu
= opaque
;
55 /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
56 version_id is increased. */
57 cpu
->interrupt_request
&= ~0x01;
60 /* loadvm has just updated the content of RAM, bypassing the
61 * usual mechanisms that ensure we flush TBs for writes to
62 * memory we've translated code from. So we must flush all TBs,
63 * which will now be stale.
70 static int cpu_common_pre_load(void *opaque
)
72 CPUState
*cpu
= opaque
;
74 cpu
->exception_index
= -1;
79 static bool cpu_common_exception_index_needed(void *opaque
)
81 CPUState
*cpu
= opaque
;
83 return tcg_enabled() && cpu
->exception_index
!= -1;
86 static const VMStateDescription vmstate_cpu_common_exception_index
= {
87 .name
= "cpu_common/exception_index",
89 .minimum_version_id
= 1,
90 .needed
= cpu_common_exception_index_needed
,
91 .fields
= (VMStateField
[]) {
92 VMSTATE_INT32(exception_index
, CPUState
),
97 static bool cpu_common_crash_occurred_needed(void *opaque
)
99 CPUState
*cpu
= opaque
;
101 return cpu
->crash_occurred
;
104 static const VMStateDescription vmstate_cpu_common_crash_occurred
= {
105 .name
= "cpu_common/crash_occurred",
107 .minimum_version_id
= 1,
108 .needed
= cpu_common_crash_occurred_needed
,
109 .fields
= (VMStateField
[]) {
110 VMSTATE_BOOL(crash_occurred
, CPUState
),
111 VMSTATE_END_OF_LIST()
115 const VMStateDescription vmstate_cpu_common
= {
116 .name
= "cpu_common",
118 .minimum_version_id
= 1,
119 .pre_load
= cpu_common_pre_load
,
120 .post_load
= cpu_common_post_load
,
121 .fields
= (VMStateField
[]) {
122 VMSTATE_UINT32(halted
, CPUState
),
123 VMSTATE_UINT32(interrupt_request
, CPUState
),
124 VMSTATE_END_OF_LIST()
126 .subsections
= (const VMStateDescription
*[]) {
127 &vmstate_cpu_common_exception_index
,
128 &vmstate_cpu_common_crash_occurred
,
134 void cpu_exec_realizefn(CPUState
*cpu
, Error
**errp
)
136 /* cache the cpu class for the hotpath */
137 cpu
->cc
= CPU_GET_CLASS(cpu
);
139 if (!accel_cpu_common_realize(cpu
, errp
)) {
143 /* NB: errp parameter is unused currently */
145 tcg_exec_realizefn(cpu
, errp
);
148 /* Wait until cpu initialization complete before exposing cpu. */
151 /* Plugin initialization must wait until cpu_index assigned. */
153 qemu_plugin_vcpu_init_hook(cpu
);
156 #ifdef CONFIG_USER_ONLY
157 assert(qdev_get_vmsd(DEVICE(cpu
)) == NULL
||
158 qdev_get_vmsd(DEVICE(cpu
))->unmigratable
);
160 if (qdev_get_vmsd(DEVICE(cpu
)) == NULL
) {
161 vmstate_register(NULL
, cpu
->cpu_index
, &vmstate_cpu_common
, cpu
);
163 if (cpu
->cc
->sysemu_ops
->legacy_vmsd
!= NULL
) {
164 vmstate_register(NULL
, cpu
->cpu_index
, cpu
->cc
->sysemu_ops
->legacy_vmsd
, cpu
);
166 #endif /* CONFIG_USER_ONLY */
169 void cpu_exec_unrealizefn(CPUState
*cpu
)
171 #ifndef CONFIG_USER_ONLY
172 CPUClass
*cc
= CPU_GET_CLASS(cpu
);
174 if (cc
->sysemu_ops
->legacy_vmsd
!= NULL
) {
175 vmstate_unregister(NULL
, cc
->sysemu_ops
->legacy_vmsd
, cpu
);
177 if (qdev_get_vmsd(DEVICE(cpu
)) == NULL
) {
178 vmstate_unregister(NULL
, &vmstate_cpu_common
, cpu
);
182 /* Call the plugin hook before clearing cpu->cpu_index in cpu_list_remove */
184 qemu_plugin_vcpu_exit_hook(cpu
);
187 cpu_list_remove(cpu
);
189 * Now that the vCPU has been removed from the RCU list, we can call
190 * tcg_exec_unrealizefn and
191 * accel_cpu_common_unrealize, which may free fields using call_rcu.
193 accel_cpu_common_unrealize(cpu
);
195 tcg_exec_unrealizefn(cpu
);
200 * This can't go in hw/core/cpu.c because that file is compiled only
201 * once for both user-mode and system builds.
203 static Property cpu_common_props
[] = {
204 #ifdef CONFIG_USER_ONLY
206 * Create a property for the user-only object, so users can
207 * adjust prctl(PR_SET_UNALIGN) from the command-line.
208 * Has no effect if the target does not support the feature.
210 DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState
,
211 prctl_unalign_sigbus
, false),
214 * Create a memory property for softmmu CPU object, so users can
215 * wire up its memory. The default if no link is set up is to use
216 * the system address space.
218 DEFINE_PROP_LINK("memory", CPUState
, memory
, TYPE_MEMORY_REGION
,
221 DEFINE_PROP_END_OF_LIST(),
224 static bool cpu_get_start_powered_off(Object
*obj
, Error
**errp
)
226 CPUState
*cpu
= CPU(obj
);
227 return cpu
->start_powered_off
;
230 static void cpu_set_start_powered_off(Object
*obj
, bool value
, Error
**errp
)
232 CPUState
*cpu
= CPU(obj
);
233 cpu
->start_powered_off
= value
;
236 void cpu_class_init_props(DeviceClass
*dc
)
238 ObjectClass
*oc
= OBJECT_CLASS(dc
);
240 device_class_set_props(dc
, cpu_common_props
);
242 * We can't use DEFINE_PROP_BOOL in the Property array for this
243 * property, because we want this to be settable after realize.
245 object_class_property_add_bool(oc
, "start-powered-off",
246 cpu_get_start_powered_off
,
247 cpu_set_start_powered_off
);
250 void cpu_exec_initfn(CPUState
*cpu
)
255 #ifndef CONFIG_USER_ONLY
256 cpu
->thread_id
= qemu_get_thread_id();
257 cpu
->memory
= get_system_memory();
258 object_ref(OBJECT(cpu
->memory
));
262 const char *parse_cpu_option(const char *cpu_option
)
266 gchar
**model_pieces
;
267 const char *cpu_type
;
269 model_pieces
= g_strsplit(cpu_option
, ",", 2);
270 if (!model_pieces
[0]) {
271 error_report("-cpu option cannot be empty");
275 oc
= cpu_class_by_name(CPU_RESOLVING_TYPE
, model_pieces
[0]);
277 error_report("unable to find CPU model '%s'", model_pieces
[0]);
278 g_strfreev(model_pieces
);
282 cpu_type
= object_class_get_name(oc
);
284 cc
->parse_features(cpu_type
, model_pieces
[1], &error_fatal
);
285 g_strfreev(model_pieces
);
291 /* XXX: implement xxx_cpu_list for targets that still miss it */
292 #if defined(cpu_list)
297 #if defined(CONFIG_USER_ONLY)
298 void tb_invalidate_phys_addr(hwaddr addr
)
301 tb_invalidate_phys_page(addr
);
305 void tb_invalidate_phys_addr(AddressSpace
*as
, hwaddr addr
, MemTxAttrs attrs
)
311 if (!tcg_enabled()) {
315 RCU_READ_LOCK_GUARD();
316 mr
= address_space_translate(as
, addr
, &addr
, &l
, false, attrs
);
317 if (!(memory_region_is_ram(mr
)
318 || memory_region_is_romd(mr
))) {
321 ram_addr
= memory_region_get_ram_addr(mr
) + addr
;
322 tb_invalidate_phys_page(ram_addr
);
326 /* enable or disable single step mode. EXCP_DEBUG is returned by the
327 CPU loop after each instruction */
328 void cpu_single_step(CPUState
*cpu
, int enabled
)
330 if (cpu
->singlestep_enabled
!= enabled
) {
331 cpu
->singlestep_enabled
= enabled
;
333 #if !defined(CONFIG_USER_ONLY)
334 const AccelOpsClass
*ops
= cpus_get_accel();
335 if (ops
->update_guest_debug
) {
336 ops
->update_guest_debug(cpu
);
340 trace_breakpoint_singlestep(cpu
->cpu_index
, enabled
);
344 void cpu_abort(CPUState
*cpu
, const char *fmt
, ...)
351 fprintf(stderr
, "qemu: fatal: ");
352 vfprintf(stderr
, fmt
, ap
);
353 fprintf(stderr
, "\n");
354 cpu_dump_state(cpu
, stderr
, CPU_DUMP_FPU
| CPU_DUMP_CCOP
);
355 if (qemu_log_separate()) {
356 FILE *logfile
= qemu_log_trylock();
358 fprintf(logfile
, "qemu: fatal: ");
359 vfprintf(logfile
, fmt
, ap2
);
360 fprintf(logfile
, "\n");
361 cpu_dump_state(cpu
, logfile
, CPU_DUMP_FPU
| CPU_DUMP_CCOP
);
362 qemu_log_unlock(logfile
);
368 #if defined(CONFIG_USER_ONLY)
370 struct sigaction act
;
371 sigfillset(&act
.sa_mask
);
372 act
.sa_handler
= SIG_DFL
;
374 sigaction(SIGABRT
, &act
, NULL
);
380 /* physical memory access (slow version, mainly for debug) */
381 #if defined(CONFIG_USER_ONLY)
382 int cpu_memory_rw_debug(CPUState
*cpu
, vaddr addr
,
383 void *ptr
, size_t len
, bool is_write
)
391 page
= addr
& TARGET_PAGE_MASK
;
392 l
= (page
+ TARGET_PAGE_SIZE
) - addr
;
395 flags
= page_get_flags(page
);
396 if (!(flags
& PAGE_VALID
))
399 if (!(flags
& PAGE_WRITE
))
401 /* XXX: this code should not depend on lock_user */
402 if (!(p
= lock_user(VERIFY_WRITE
, addr
, l
, 0)))
405 unlock_user(p
, addr
, l
);
407 if (!(flags
& PAGE_READ
))
409 /* XXX: this code should not depend on lock_user */
410 if (!(p
= lock_user(VERIFY_READ
, addr
, l
, 1)))
413 unlock_user(p
, addr
, 0);
423 bool target_words_bigendian(void)
425 return TARGET_BIG_ENDIAN
;
428 const char *target_name(void)
433 void page_size_init(void)
435 /* NOTE: we can always suppose that qemu_host_page_size >=
437 if (qemu_host_page_size
== 0) {
438 qemu_host_page_size
= qemu_real_host_page_size();
440 if (qemu_host_page_size
< TARGET_PAGE_SIZE
) {
441 qemu_host_page_size
= TARGET_PAGE_SIZE
;
443 qemu_host_page_mask
= -(intptr_t)qemu_host_page_size
;