From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jike Song Subject: Re: [v3 0/5] plumb kvm/vfio to allow getting kvm from vfio_group Date: Mon, 31 Oct 2016 15:24:28 +0800 Message-ID: <5816F1AC.7030200@intel.com> References: <1477895706-22824-1-git-send-email-jike.song@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: pbonzini@redhat.com, alex.williamson@redhat.com, kwankhede@nvidia.com, cjia@nvidia.com, kevin.tian@intel.com, kvm@vger.kernel.org To: Xiao Guangrong Return-path: Received: from mga07.intel.com ([134.134.136.100]:36009 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761577AbcJaH1u (ORCPT ); Mon, 31 Oct 2016 03:27:50 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 10/31/2016 03:06 PM, Xiao Guangrong wrote: > > > On 10/31/2016 02:35 PM, Jike Song wrote: >> So far KVM and VFIO are mostly transparent to each other. >> However, there are users who would rely on them both. For >> example, KVMGT relies on VFIO to mediate device operations, >> and it also relies on KVM for features such as guest page >> tracking. To do that, it needs to know which KVM instance >> a vfio_group is attached to. >> >> There is already a kvm_vfio device serving for similar purpose, >> this patchset extend it to allow external usrs like KVMGT to >> get KVM instance from the vfio_group. >> >> >> I picked one of Kirti's patchset from: >> >> https://lkml.org/lkml/2016/10/26/1119 >> >> for the function to get the vfio_group from a given device. >> >> >> Changes v3: >> - don't touch kvm_put_kvm, vfio won't need it > > Do not understand. vfio does not use it indeed, however, the > user of udata, i.e, KVMGT, should put kvm after vfio_group_get_kvm(). Yes, but I guess KVMGT can has symbol-level dependency on KVM :-) -- Thanks, Jike