include/qom/cpu.h

   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  * @reset: Callback to reset the #CPUState to its initial state.
  44  *
  45  * Represents a CPU family or model.
  46  */
  47 typedef struct CPUClass {
  48     /*< private >*/
  49     DeviceClass parent_class;
  50     /*< public >*/
  51
  52     void (*reset)(CPUState *cpu);
  53 } CPUClass;
  54
  55 struct KVMState;
  56 struct kvm_run;
  57
  58 /**
  59  * CPUState:
  60  * @nr_cores: Number of cores within this CPU package.
  61  * @nr_threads: Number of threads within this CPU.
  62  * @numa_node: NUMA node this CPU is belonging to.
  63  * @created: Indicates whether the CPU thread has been successfully created.
  64  * @stop: Indicates a pending stop request.
  65  * @stopped: Indicates the CPU has been artificially stopped.
  66  * @kvm_fd: vCPU file descriptor for KVM.
  67  *
  68  * State of one CPU core or thread.
  69  */
  70 struct CPUState {
  71     /*< private >*/
  72     DeviceState parent_obj;
  73     /*< public >*/
  74
  75     int nr_cores;
  76     int nr_threads;
  77     int numa_node;
  78
  79     struct QemuThread *thread;
  80 #ifdef _WIN32
  81     HANDLE hThread;
  82 #endif
  83     int thread_id;
  84     struct QemuCond *halt_cond;
  85     struct qemu_work_item *queued_work_first, *queued_work_last;
  86     bool thread_kicked;
  87     bool created;
  88     bool stop;
  89     bool stopped;
  90
  91 #if !defined(CONFIG_USER_ONLY)
  92     int kvm_fd;
  93     bool kvm_vcpu_dirty;
  94 #endif
  95     struct KVMState *kvm_state;
  96     struct kvm_run *kvm_run;
  97
  98     /* TODO Move common fields from CPUArchState here. */
  99 };
 100
 101
 102 /**
 103  * cpu_reset:
 104  * @cpu: The CPU whose state is to be reset.
 105  */
 106 void cpu_reset(CPUState *cpu);
 107
 108 /**
 109  * qemu_cpu_has_work:
 110  * @cpu: The vCPU to check.
 111  *
 112  * Checks whether the CPU has work to do.
 113  *
 114  * Returns: %true if the CPU has work, %false otherwise.
 115  */
 116 bool qemu_cpu_has_work(CPUState *cpu);
 117
 118 /**
 119  * qemu_cpu_is_self:
 120  * @cpu: The vCPU to check against.
 121  *
 122  * Checks whether the caller is executing on the vCPU thread.
 123  *
 124  * Returns: %true if called from @cpu's thread, %false otherwise.
 125  */
 126 bool qemu_cpu_is_self(CPUState *cpu);
 127
 128 /**
 129  * qemu_cpu_kick:
 130  * @cpu: The vCPU to kick.
 131  *
 132  * Kicks @cpu's thread.
 133  */
 134 void qemu_cpu_kick(CPUState *cpu);
 135
 136 /**
 137  * cpu_is_stopped:
 138  * @cpu: The CPU to check.
 139  *
 140  * Checks whether the CPU is stopped.
 141  *
 142  * Returns: %true if run state is not running or if artificially stopped;
 143  * %false otherwise.
 144  */
 145 bool cpu_is_stopped(CPUState *cpu);
 146
 147 /**
 148  * run_on_cpu:
 149  * @cpu: The vCPU to run on.
 150  * @func: The function to be executed.
 151  * @data: Data to pass to the function.
 152  *
 153  * Schedules the function @func for execution on the vCPU @cpu.
 154  */
 155 void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
 156
 157
 158 #endif