1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
|
/*
* QEMU CPU model
*
* Copyright (c) 2012 SUSE LINUX Products GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see
* <http://www.gnu.org/licenses/gpl-2.0.html>
*/
#ifndef QEMU_CPU_H
#define QEMU_CPU_H
#include <signal.h>
#include "hw/qdev-core.h"
#include "qemu/thread.h"
/**
* SECTION:cpu
* @section_id: QEMU-cpu
* @title: CPU Class
* @short_description: Base class for all CPUs
*/
#define TYPE_CPU "cpu"
#define CPU(obj) OBJECT_CHECK(CPUState, (obj), TYPE_CPU)
#define CPU_CLASS(class) OBJECT_CLASS_CHECK(CPUClass, (class), TYPE_CPU)
#define CPU_GET_CLASS(obj) OBJECT_GET_CLASS(CPUClass, (obj), TYPE_CPU)
typedef struct CPUState CPUState;
/**
* CPUClass:
* @class_by_name: Callback to map -cpu command line model name to an
* instantiatable CPU type.
* @reset: Callback to reset the #CPUState to its initial state.
* @do_interrupt: Callback for interrupt handling.
* @get_arch_id: Callback for getting architecture-dependent CPU ID.
* @vmsd: State description for migration.
*
* Represents a CPU family or model.
*/
typedef struct CPUClass {
/*< private >*/
DeviceClass parent_class;
/*< public >*/
ObjectClass *(*class_by_name)(const char *cpu_model);
void (*reset)(CPUState *cpu);
void (*do_interrupt)(CPUState *cpu);
int64_t (*get_arch_id)(CPUState *cpu);
const struct VMStateDescription *vmsd;
} CPUClass;
struct KVMState;
struct kvm_run;
/**
* CPUState:
* @cpu_index: CPU index (informative).
* @nr_cores: Number of cores within this CPU package.
* @nr_threads: Number of threads within this CPU.
* @numa_node: NUMA node this CPU is belonging to.
* @host_tid: Host thread ID.
* @running: #true if CPU is currently running (usermode).
* @created: Indicates whether the CPU thread has been successfully created.
* @interrupt_request: Indicates a pending interrupt request.
* @halted: Nonzero if the CPU is in suspended state.
* @stop: Indicates a pending stop request.
* @stopped: Indicates the CPU has been artificially stopped.
* @tcg_exit_req: Set to force TCG to stop executing linked TBs for this
* CPU and return to its top level loop.
* @env_ptr: Pointer to subclass-specific CPUArchState field.
* @current_tb: Currently executing TB.
* @kvm_fd: vCPU file descriptor for KVM.
*
* State of one CPU core or thread.
*/
struct CPUState {
/*< private >*/
DeviceState parent_obj;
/*< public >*/
int nr_cores;
int nr_threads;
int numa_node;
struct QemuThread *thread;
#ifdef _WIN32
HANDLE hThread;
#endif
int thread_id;
uint32_t host_tid;
bool running;
struct QemuCond *halt_cond;
struct qemu_work_item *queued_work_first, *queued_work_last;
bool thread_kicked;
bool created;
bool stop;
bool stopped;
volatile sig_atomic_t exit_request;
volatile sig_atomic_t tcg_exit_req;
uint32_t interrupt_request;
void *env_ptr; /* CPUArchState */
struct TranslationBlock *current_tb;
int kvm_fd;
bool kvm_vcpu_dirty;
struct KVMState *kvm_state;
struct kvm_run *kvm_run;
/* TODO Move common fields from CPUArchState here. */
int cpu_index; /* used by alpha TCG */
uint32_t halted; /* used by alpha, cris, ppc TCG */
};
/**
* cpu_reset:
* @cpu: The CPU whose state is to be reset.
*/
void cpu_reset(CPUState *cpu);
/**
* cpu_class_by_name:
* @typename: The CPU base type.
* @cpu_model: The model string without any parameters.
*
* Looks up a CPU #ObjectClass matching name @cpu_model.
*
* Returns: A #CPUClass or %NULL if not matching class is found.
*/
ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model);
/**
* cpu_class_set_vmsd:
* @cc: CPU class
* @value: Value to set. Unused for %CONFIG_USER_ONLY.
*
* Sets #VMStateDescription for @cc.
*
* The @value argument is intentionally discarded for the non-softmmu targets
* to avoid linker errors or excessive preprocessor usage. If this behavior
* is undesired, you should assign #CPUState.vmsd directly instead.
*/
#ifndef CONFIG_USER_ONLY
static inline void cpu_class_set_vmsd(CPUClass *cc,
const struct VMStateDescription *value)
{
cc->vmsd = value;
}
#else
#define cpu_class_set_vmsd(cc, value) ((cc)->vmsd = NULL)
#endif
/**
* qemu_cpu_has_work:
* @cpu: The vCPU to check.
*
* Checks whether the CPU has work to do.
*
* Returns: %true if the CPU has work, %false otherwise.
*/
bool qemu_cpu_has_work(CPUState *cpu);
/**
* qemu_cpu_is_self:
* @cpu: The vCPU to check against.
*
* Checks whether the caller is executing on the vCPU thread.
*
* Returns: %true if called from @cpu's thread, %false otherwise.
*/
bool qemu_cpu_is_self(CPUState *cpu);
/**
* qemu_cpu_kick:
* @cpu: The vCPU to kick.
*
* Kicks @cpu's thread.
*/
void qemu_cpu_kick(CPUState *cpu);
/**
* cpu_is_stopped:
* @cpu: The CPU to check.
*
* Checks whether the CPU is stopped.
*
* Returns: %true if run state is not running or if artificially stopped;
* %false otherwise.
*/
bool cpu_is_stopped(CPUState *cpu);
/**
* run_on_cpu:
* @cpu: The vCPU to run on.
* @func: The function to be executed.
* @data: Data to pass to the function.
*
* Schedules the function @func for execution on the vCPU @cpu.
*/
void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
/**
* qemu_get_cpu:
* @index: The CPUState@cpu_index value of the CPU to obtain.
*
* Gets a CPU matching @index.
*
* Returns: The CPU or %NULL if there is no matching CPU.
*/
CPUState *qemu_get_cpu(int index);
#ifndef CONFIG_USER_ONLY
typedef void (*CPUInterruptHandler)(CPUState *, int);
extern CPUInterruptHandler cpu_interrupt_handler;
/**
* cpu_interrupt:
* @cpu: The CPU to set an interrupt on.
* @mask: The interupts to set.
*
* Invokes the interrupt handler.
*/
static inline void cpu_interrupt(CPUState *cpu, int mask)
{
cpu_interrupt_handler(cpu, mask);
}
#else /* USER_ONLY */
void cpu_interrupt(CPUState *cpu, int mask);
#endif /* USER_ONLY */
/**
* cpu_reset_interrupt:
* @cpu: The CPU to clear the interrupt on.
* @mask: The interrupt mask to clear.
*
* Resets interrupts on the vCPU @cpu.
*/
void cpu_reset_interrupt(CPUState *cpu, int mask);
/**
* cpu_resume:
* @cpu: The CPU to resume.
*
* Resumes CPU, i.e. puts CPU into runnable state.
*/
void cpu_resume(CPUState *cpu);
#endif
|