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1 | /* | |
2 | * QEMU CPU model | |
3 | * | |
4 | * Copyright (c) 2012 SUSE LINUX Products GmbH | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program 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 | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see | |
18 | * <http://www.gnu.org/licenses/gpl-2.0.html> | |
19 | */ | |
20 | #ifndef QEMU_CPU_H | |
21 | #define QEMU_CPU_H | |
22 | ||
23 | #include "hw/qdev-core.h" | |
24 | #include "qemu/thread.h" | |
25 | ||
26 | /** | |
27 | * SECTION:cpu | |
28 | * @section_id: QEMU-cpu | |
29 | * @title: CPU Class | |
30 | * @short_description: Base class for all CPUs | |
31 | */ | |
32 | ||
33 | #define TYPE_CPU "cpu" | |
34 | ||
35 | #define CPU(obj) OBJECT_CHECK(CPUState, (obj), TYPE_CPU) | |
36 | #define CPU_CLASS(class) OBJECT_CLASS_CHECK(CPUClass, (class), TYPE_CPU) | |
37 | #define CPU_GET_CLASS(obj) OBJECT_GET_CLASS(CPUClass, (obj), TYPE_CPU) | |
38 | ||
39 | typedef struct CPUState CPUState; | |
40 | ||
41 | /** | |
42 | * CPUClass: | |
43 | * @class_by_name: Callback to map -cpu command line model name to an | |
44 | * instantiatable CPU type. | |
45 | * @reset: Callback to reset the #CPUState to its initial state. | |
46 | * | |
47 | * Represents a CPU family or model. | |
48 | */ | |
49 | typedef struct CPUClass { | |
50 | /*< private >*/ | |
51 | DeviceClass parent_class; | |
52 | /*< public >*/ | |
53 | ||
54 | ObjectClass *(*class_by_name)(const char *cpu_model); | |
55 | ||
56 | void (*reset)(CPUState *cpu); | |
57 | } CPUClass; | |
58 | ||
59 | struct KVMState; | |
60 | struct kvm_run; | |
61 | ||
62 | /** | |
63 | * CPUState: | |
64 | * @cpu_index: CPU index (informative). | |
65 | * @nr_cores: Number of cores within this CPU package. | |
66 | * @nr_threads: Number of threads within this CPU. | |
67 | * @numa_node: NUMA node this CPU is belonging to. | |
68 | * @host_tid: Host thread ID. | |
69 | * @running: #true if CPU is currently running (usermode). | |
70 | * @created: Indicates whether the CPU thread has been successfully created. | |
71 | * @stop: Indicates a pending stop request. | |
72 | * @stopped: Indicates the CPU has been artificially stopped. | |
73 | * @kvm_fd: vCPU file descriptor for KVM. | |
74 | * | |
75 | * State of one CPU core or thread. | |
76 | */ | |
77 | struct CPUState { | |
78 | /*< private >*/ | |
79 | DeviceState parent_obj; | |
80 | /*< public >*/ | |
81 | ||
82 | int nr_cores; | |
83 | int nr_threads; | |
84 | int numa_node; | |
85 | ||
86 | struct QemuThread *thread; | |
87 | #ifdef _WIN32 | |
88 | HANDLE hThread; | |
89 | #endif | |
90 | int thread_id; | |
91 | uint32_t host_tid; | |
92 | bool running; | |
93 | struct QemuCond *halt_cond; | |
94 | struct qemu_work_item *queued_work_first, *queued_work_last; | |
95 | bool thread_kicked; | |
96 | bool created; | |
97 | bool stop; | |
98 | bool stopped; | |
99 | ||
100 | int kvm_fd; | |
101 | bool kvm_vcpu_dirty; | |
102 | struct KVMState *kvm_state; | |
103 | struct kvm_run *kvm_run; | |
104 | ||
105 | /* TODO Move common fields from CPUArchState here. */ | |
106 | int cpu_index; /* used by alpha TCG */ | |
107 | }; | |
108 | ||
109 | ||
110 | /** | |
111 | * cpu_reset: | |
112 | * @cpu: The CPU whose state is to be reset. | |
113 | */ | |
114 | void cpu_reset(CPUState *cpu); | |
115 | ||
116 | /** | |
117 | * cpu_class_by_name: | |
118 | * @typename: The CPU base type. | |
119 | * @cpu_model: The model string without any parameters. | |
120 | * | |
121 | * Looks up a CPU #ObjectClass matching name @cpu_model. | |
122 | * | |
123 | * Returns: A #CPUClass or %NULL if not matching class is found. | |
124 | */ | |
125 | ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model); | |
126 | ||
127 | /** | |
128 | * qemu_cpu_has_work: | |
129 | * @cpu: The vCPU to check. | |
130 | * | |
131 | * Checks whether the CPU has work to do. | |
132 | * | |
133 | * Returns: %true if the CPU has work, %false otherwise. | |
134 | */ | |
135 | bool qemu_cpu_has_work(CPUState *cpu); | |
136 | ||
137 | /** | |
138 | * qemu_cpu_is_self: | |
139 | * @cpu: The vCPU to check against. | |
140 | * | |
141 | * Checks whether the caller is executing on the vCPU thread. | |
142 | * | |
143 | * Returns: %true if called from @cpu's thread, %false otherwise. | |
144 | */ | |
145 | bool qemu_cpu_is_self(CPUState *cpu); | |
146 | ||
147 | /** | |
148 | * qemu_cpu_kick: | |
149 | * @cpu: The vCPU to kick. | |
150 | * | |
151 | * Kicks @cpu's thread. | |
152 | */ | |
153 | void qemu_cpu_kick(CPUState *cpu); | |
154 | ||
155 | /** | |
156 | * cpu_is_stopped: | |
157 | * @cpu: The CPU to check. | |
158 | * | |
159 | * Checks whether the CPU is stopped. | |
160 | * | |
161 | * Returns: %true if run state is not running or if artificially stopped; | |
162 | * %false otherwise. | |
163 | */ | |
164 | bool cpu_is_stopped(CPUState *cpu); | |
165 | ||
166 | /** | |
167 | * run_on_cpu: | |
168 | * @cpu: The vCPU to run on. | |
169 | * @func: The function to be executed. | |
170 | * @data: Data to pass to the function. | |
171 | * | |
172 | * Schedules the function @func for execution on the vCPU @cpu. | |
173 | */ | |
174 | void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); | |
175 | ||
176 | /** | |
177 | * qemu_get_cpu: | |
178 | * @index: The CPUState@cpu_index value of the CPU to obtain. | |
179 | * | |
180 | * Gets a CPU matching @index. | |
181 | * | |
182 | * Returns: The CPU or %NULL if there is no matching CPU. | |
183 | */ | |
184 | CPUState *qemu_get_cpu(int index); | |
185 | ||
186 | ||
187 | #endif |