Il 17/12/2013 07:11, Arthur Chunqi Li ha scritto: > Hi Paolo, > > Since VCPU is managed the same as a process in kernel, how can I know > the status (running, sleeping etc.) of a vcpu in kernel? Is there a > variant in struct kvm_vcpu or something else indicate this? waitqueue_active(&vcpu->wq) means that the VCPU is sleeping in the kernel (i.e. in a halted state). vcpu->mode == IN_GUEST_MODE means that the VCPU is running. Anything else means that the host is running some kind of "glue" code (either kernel or userspace). > Besides, if vcpu1 is running on pcpu1, and a kernel thread running on > pcpu0. Can the kernel thread send a message to force vcpu1 trap to > VMM? How can I do this? Yes, with kvm_vcpu_kick. KVM tracks internally which pcpu will run the vcpu in vcpu->cpu, and kvm_vcpu_kick sends either a wakeup (if the vcpu is sleeping) or an IPI (if it is running). Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
