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 "qemu-common.h"
22 #include "qapi/error.h"
24 #include "exec/target_page.h"
25 #include "hw/qdev-core.h"
26 #include "hw/qdev-properties.h"
27 #include "qemu/error-report.h"
28 #include "migration/vmstate.h"
29 #ifdef CONFIG_USER_ONLY
32 #include "hw/core/sysemu-cpu-ops.h"
33 #include "exec/address-spaces.h"
35 #include "sysemu/tcg.h"
36 #include "sysemu/kvm.h"
37 #include "sysemu/replay.h"
38 #include "exec/exec-all.h"
39 #include "exec/translate-all.h"
41 #include "hw/core/accel-cpu.h"
42 #include "trace/trace-root.h"
43 #include "qemu/accel.h"
45 uintptr_t qemu_host_page_size
;
46 intptr_t qemu_host_page_mask
;
48 #ifndef CONFIG_USER_ONLY
49 static int cpu_common_post_load(void *opaque
, int version_id
)
51 CPUState
*cpu
= opaque
;
53 /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
54 version_id is increased. */
55 cpu
->interrupt_request
&= ~0x01;
58 /* loadvm has just updated the content of RAM, bypassing the
59 * usual mechanisms that ensure we flush TBs for writes to
60 * memory we've translated code from. So we must flush all TBs,
61 * which will now be stale.
68 static int cpu_common_pre_load(void *opaque
)
70 CPUState
*cpu
= opaque
;
72 cpu
->exception_index
= -1;
77 static bool cpu_common_exception_index_needed(void *opaque
)
79 CPUState
*cpu
= opaque
;
81 return tcg_enabled() && cpu
->exception_index
!= -1;
84 static const VMStateDescription vmstate_cpu_common_exception_index
= {
85 .name
= "cpu_common/exception_index",
87 .minimum_version_id
= 1,
88 .needed
= cpu_common_exception_index_needed
,
89 .fields
= (VMStateField
[]) {
90 VMSTATE_INT32(exception_index
, CPUState
),
95 static bool cpu_common_crash_occurred_needed(void *opaque
)
97 CPUState
*cpu
= opaque
;
99 return cpu
->crash_occurred
;
102 static const VMStateDescription vmstate_cpu_common_crash_occurred
= {
103 .name
= "cpu_common/crash_occurred",
105 .minimum_version_id
= 1,
106 .needed
= cpu_common_crash_occurred_needed
,
107 .fields
= (VMStateField
[]) {
108 VMSTATE_BOOL(crash_occurred
, CPUState
),
109 VMSTATE_END_OF_LIST()
113 const VMStateDescription vmstate_cpu_common
= {
114 .name
= "cpu_common",
116 .minimum_version_id
= 1,
117 .pre_load
= cpu_common_pre_load
,
118 .post_load
= cpu_common_post_load
,
119 .fields
= (VMStateField
[]) {
120 VMSTATE_UINT32(halted
, CPUState
),
121 VMSTATE_UINT32(interrupt_request
, CPUState
),
122 VMSTATE_END_OF_LIST()
124 .subsections
= (const VMStateDescription
*[]) {
125 &vmstate_cpu_common_exception_index
,
126 &vmstate_cpu_common_crash_occurred
,
132 void cpu_exec_realizefn(CPUState
*cpu
, Error
**errp
)
134 #ifndef CONFIG_USER_ONLY
135 CPUClass
*cc
= CPU_GET_CLASS(cpu
);
139 if (!accel_cpu_realizefn(cpu
, errp
)) {
142 /* NB: errp parameter is unused currently */
144 tcg_exec_realizefn(cpu
, errp
);
147 #ifdef CONFIG_USER_ONLY
148 assert(qdev_get_vmsd(DEVICE(cpu
)) == NULL
||
149 qdev_get_vmsd(DEVICE(cpu
))->unmigratable
);
151 if (qdev_get_vmsd(DEVICE(cpu
)) == NULL
) {
152 vmstate_register(NULL
, cpu
->cpu_index
, &vmstate_cpu_common
, cpu
);
154 if (cc
->sysemu_ops
->legacy_vmsd
!= NULL
) {
155 vmstate_register(NULL
, cpu
->cpu_index
, cc
->sysemu_ops
->legacy_vmsd
, cpu
);
157 #endif /* CONFIG_USER_ONLY */
160 void cpu_exec_unrealizefn(CPUState
*cpu
)
162 #ifndef CONFIG_USER_ONLY
163 CPUClass
*cc
= CPU_GET_CLASS(cpu
);
165 if (cc
->sysemu_ops
->legacy_vmsd
!= NULL
) {
166 vmstate_unregister(NULL
, cc
->sysemu_ops
->legacy_vmsd
, cpu
);
168 if (qdev_get_vmsd(DEVICE(cpu
)) == NULL
) {
169 vmstate_unregister(NULL
, &vmstate_cpu_common
, cpu
);
173 tcg_exec_unrealizefn(cpu
);
176 cpu_list_remove(cpu
);
180 * This can't go in hw/core/cpu.c because that file is compiled only
181 * once for both user-mode and system builds.
183 static Property cpu_common_props
[] = {
184 #ifdef CONFIG_USER_ONLY
186 * Create a property for the user-only object, so users can
187 * adjust prctl(PR_SET_UNALIGN) from the command-line.
188 * Has no effect if the target does not support the feature.
190 DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState
,
191 prctl_unalign_sigbus
, false),
194 * Create a memory property for softmmu CPU object, so users can
195 * wire up its memory. The default if no link is set up is to use
196 * the system address space.
198 DEFINE_PROP_LINK("memory", CPUState
, memory
, TYPE_MEMORY_REGION
,
201 DEFINE_PROP_END_OF_LIST(),
204 static bool cpu_get_start_powered_off(Object
*obj
, Error
**errp
)
206 CPUState
*cpu
= CPU(obj
);
207 return cpu
->start_powered_off
;
210 static void cpu_set_start_powered_off(Object
*obj
, bool value
, Error
**errp
)
212 CPUState
*cpu
= CPU(obj
);
213 cpu
->start_powered_off
= value
;
216 void cpu_class_init_props(DeviceClass
*dc
)
218 ObjectClass
*oc
= OBJECT_CLASS(dc
);
220 device_class_set_props(dc
, cpu_common_props
);
222 * We can't use DEFINE_PROP_BOOL in the Property array for this
223 * property, because we want this to be settable after realize.
225 object_class_property_add_bool(oc
, "start-powered-off",
226 cpu_get_start_powered_off
,
227 cpu_set_start_powered_off
);
230 void cpu_exec_initfn(CPUState
*cpu
)
235 #ifndef CONFIG_USER_ONLY
236 cpu
->thread_id
= qemu_get_thread_id();
237 cpu
->memory
= get_system_memory();
238 object_ref(OBJECT(cpu
->memory
));
242 const char *parse_cpu_option(const char *cpu_option
)
246 gchar
**model_pieces
;
247 const char *cpu_type
;
249 model_pieces
= g_strsplit(cpu_option
, ",", 2);
250 if (!model_pieces
[0]) {
251 error_report("-cpu option cannot be empty");
255 oc
= cpu_class_by_name(CPU_RESOLVING_TYPE
, model_pieces
[0]);
257 error_report("unable to find CPU model '%s'", model_pieces
[0]);
258 g_strfreev(model_pieces
);
262 cpu_type
= object_class_get_name(oc
);
264 cc
->parse_features(cpu_type
, model_pieces
[1], &error_fatal
);
265 g_strfreev(model_pieces
);
269 #if defined(CONFIG_USER_ONLY)
270 void tb_invalidate_phys_addr(target_ulong addr
)
273 tb_invalidate_phys_page_range(addr
, addr
+ 1);
277 void tb_invalidate_phys_addr(AddressSpace
*as
, hwaddr addr
, MemTxAttrs attrs
)
283 if (!tcg_enabled()) {
287 RCU_READ_LOCK_GUARD();
288 mr
= address_space_translate(as
, addr
, &addr
, &l
, false, attrs
);
289 if (!(memory_region_is_ram(mr
)
290 || memory_region_is_romd(mr
))) {
293 ram_addr
= memory_region_get_ram_addr(mr
) + addr
;
294 tb_invalidate_phys_page_range(ram_addr
, ram_addr
+ 1);
298 /* Add a breakpoint. */
299 int cpu_breakpoint_insert(CPUState
*cpu
, vaddr pc
, int flags
,
300 CPUBreakpoint
**breakpoint
)
302 CPUClass
*cc
= CPU_GET_CLASS(cpu
);
305 if (cc
->gdb_adjust_breakpoint
) {
306 pc
= cc
->gdb_adjust_breakpoint(cpu
, pc
);
309 bp
= g_malloc(sizeof(*bp
));
314 /* keep all GDB-injected breakpoints in front */
315 if (flags
& BP_GDB
) {
316 QTAILQ_INSERT_HEAD(&cpu
->breakpoints
, bp
, entry
);
318 QTAILQ_INSERT_TAIL(&cpu
->breakpoints
, bp
, entry
);
325 trace_breakpoint_insert(cpu
->cpu_index
, pc
, flags
);
329 /* Remove a specific breakpoint. */
330 int cpu_breakpoint_remove(CPUState
*cpu
, vaddr pc
, int flags
)
332 CPUClass
*cc
= CPU_GET_CLASS(cpu
);
335 if (cc
->gdb_adjust_breakpoint
) {
336 pc
= cc
->gdb_adjust_breakpoint(cpu
, pc
);
339 QTAILQ_FOREACH(bp
, &cpu
->breakpoints
, entry
) {
340 if (bp
->pc
== pc
&& bp
->flags
== flags
) {
341 cpu_breakpoint_remove_by_ref(cpu
, bp
);
348 /* Remove a specific breakpoint by reference. */
349 void cpu_breakpoint_remove_by_ref(CPUState
*cpu
, CPUBreakpoint
*bp
)
351 QTAILQ_REMOVE(&cpu
->breakpoints
, bp
, entry
);
353 trace_breakpoint_remove(cpu
->cpu_index
, bp
->pc
, bp
->flags
);
357 /* Remove all matching breakpoints. */
358 void cpu_breakpoint_remove_all(CPUState
*cpu
, int mask
)
360 CPUBreakpoint
*bp
, *next
;
362 QTAILQ_FOREACH_SAFE(bp
, &cpu
->breakpoints
, entry
, next
) {
363 if (bp
->flags
& mask
) {
364 cpu_breakpoint_remove_by_ref(cpu
, bp
);
369 /* enable or disable single step mode. EXCP_DEBUG is returned by the
370 CPU loop after each instruction */
371 void cpu_single_step(CPUState
*cpu
, int enabled
)
373 if (cpu
->singlestep_enabled
!= enabled
) {
374 cpu
->singlestep_enabled
= enabled
;
376 kvm_update_guest_debug(cpu
, 0);
378 trace_breakpoint_singlestep(cpu
->cpu_index
, enabled
);
382 void cpu_abort(CPUState
*cpu
, const char *fmt
, ...)
389 fprintf(stderr
, "qemu: fatal: ");
390 vfprintf(stderr
, fmt
, ap
);
391 fprintf(stderr
, "\n");
392 cpu_dump_state(cpu
, stderr
, CPU_DUMP_FPU
| CPU_DUMP_CCOP
);
393 if (qemu_log_separate()) {
394 FILE *logfile
= qemu_log_lock();
395 qemu_log("qemu: fatal: ");
396 qemu_log_vprintf(fmt
, ap2
);
398 log_cpu_state(cpu
, CPU_DUMP_FPU
| CPU_DUMP_CCOP
);
400 qemu_log_unlock(logfile
);
406 #if defined(CONFIG_USER_ONLY)
408 struct sigaction act
;
409 sigfillset(&act
.sa_mask
);
410 act
.sa_handler
= SIG_DFL
;
412 sigaction(SIGABRT
, &act
, NULL
);
418 /* physical memory access (slow version, mainly for debug) */
419 #if defined(CONFIG_USER_ONLY)
420 int cpu_memory_rw_debug(CPUState
*cpu
, vaddr addr
,
421 void *ptr
, size_t len
, bool is_write
)
429 page
= addr
& TARGET_PAGE_MASK
;
430 l
= (page
+ TARGET_PAGE_SIZE
) - addr
;
433 flags
= page_get_flags(page
);
434 if (!(flags
& PAGE_VALID
))
437 if (!(flags
& PAGE_WRITE
))
439 /* XXX: this code should not depend on lock_user */
440 if (!(p
= lock_user(VERIFY_WRITE
, addr
, l
, 0)))
443 unlock_user(p
, addr
, l
);
445 if (!(flags
& PAGE_READ
))
447 /* XXX: this code should not depend on lock_user */
448 if (!(p
= lock_user(VERIFY_READ
, addr
, l
, 1)))
451 unlock_user(p
, addr
, 0);
461 bool target_words_bigendian(void)
463 #if defined(TARGET_WORDS_BIGENDIAN)
470 void page_size_init(void)
472 /* NOTE: we can always suppose that qemu_host_page_size >=
474 if (qemu_host_page_size
== 0) {
475 qemu_host_page_size
= qemu_real_host_page_size
;
477 if (qemu_host_page_size
< TARGET_PAGE_SIZE
) {
478 qemu_host_page_size
= TARGET_PAGE_SIZE
;
480 qemu_host_page_mask
= -(intptr_t)qemu_host_page_size
;