On 05/13/2016 04:31 PM, Neo Jia wrote: > On Fri, May 13, 2016 at 07:45:14AM +0000, Tian, Kevin wrote: >> >> We use page tracking framework, which is newly added to KVM recently, >> to mark RAM pages as read-only so write accesses are intercepted to >> device model. > > Yes, I am aware of that patchset from Guangrong. So far the interface are all > requiring struct *kvm, copied from https://lkml.org/lkml/2015/11/30/644 > > - kvm_page_track_add_page(): add the page to the tracking pool after > that later specified access on that page will be tracked > > - kvm_page_track_remove_page(): remove the page from the tracking pool, > the specified access on the page is not tracked after the last user is > gone > > void kvm_page_track_add_page(struct kvm *kvm, gfn_t gfn, > enum kvm_page_track_mode mode); > void kvm_page_track_remove_page(struct kvm *kvm, gfn_t gfn, > enum kvm_page_track_mode mode); > > Really curious how you are going to have access to the struct kvm *kvm, or you > are relying on the userfaultfd to track the write faults only as part of the > QEMU userfault thread? > Hi Neo, For the vGPU used as a device for KVM guest, there will be interfaces wrapped or implemented in KVM layer, as a rival thing diverted from the interfaces for Xen. That is where the KVM related code supposed to be. -- Thanks, Jike -- 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
