本文主要是介绍KVM下vcpu描述，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
linux 内核 kvm中的vcpu描述
此结构也是KVM架构层抽象出的虚拟CPU描述，这里跟前面的KVM结构一样，是内核对虚拟机一系列资源抽象后得到的数据描述。include/linux/kvm_host.h struct kvm_vcpu { struct kvm *kvm;所关联的虚拟机描述 #ifdef CONFIG_PREEMPT_NOTIFIERS struct preempt_notifier preempt_notifier; #endif int cpu; int vcpu_id;虚拟CPU的id int srcu_idx; int mode; unsigned long requests; unsigned long guest_debug;
int pre_pcpu; struct list_head blocked_vcpu_list;
struct mutex mutex; struct kvm_run *run;
int fpu_active; int guest_fpu_loaded, guest_xcr0_loaded; unsigned char fpu_counter; struct swait_queue_head wq; struct pid *pid; int sigset_active; sigset_t sigset; struct kvm_vcpu_stat stat; unsigned int halt_poll_ns; bool valid_wakeup;
#ifdef CONFIG_HAS_IOMEM int mmio_needed; int mmio_read_completed; int mmio_is_write; int mmio_cur_fragment; int mmio_nr_fragments; struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; #endif
#ifdef CONFIG_KVM_ASYNC_PF struct { u32 queued; struct list_head queue; struct list_head done; spinlock_t lock; } async_pf; #endif
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT struct { bool in_spin_loop; bool dy_eligible; } spin_loop; #endif bool preempted; struct kvm_vcpu_arch arch; struct dentry *debugfs_dentry; }; 这里需要关注kvm_run结构，其跟具体支持虚拟化的host cpu密切相关。
这篇关于KVM下vcpu描述的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
