On 11/10/2016 04:39, Xiao Guangrong wrote: > > > On 10/11/2016 02:32 AM, Paolo Bonzini wrote: >> >> >> On 10/10/2016 20:01, Neo Jia wrote: >>>> Hi Neo, >>>> >>>> AFAIK this is needed because KVMGT doesn't paravirtualize the PPGTT, >>>> while nVidia does. >>> >>> Hi Paolo and Xiaoguang, >>> >>> I am just wondering how device driver can register a notifier so he >>> can be >>> notified for write-protected pages when writes are happening. >> >> It can't yet, but the API is ready for that. kvm_vfio_set_group is >> currently where a struct kvm_device* and struct vfio_group* touch. Given >> a struct kvm_device*, dev->kvm provides the struct kvm to be passed to >> kvm_page_track_register_notifier. So I guess you could add a callback >> that passes the struct kvm_device* to the mdev device. >> >> Xiaoguang and Guangrong, what were your plans? We discussed it briefly >> at KVM Forum but I don't remember the details. >> > > Your suggestion was that pass kvm fd to KVMGT via VFIO, so that we can > figure out the kvm instance based on the fd. > > We got a new idea, how about search the kvm instance by mm_struct, it > can work as KVMGT is running in the vcpu context and it is much more > straightforward. Perhaps I didn't understand your suggestion, but the same mm_struct can have more than 1 struct kvm so I'm not sure that it can work. 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
