From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-4251-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [66.179.20.138]) by lists.oasis-open.org (Postfix) with ESMTP id 0D92A5818E8A for ; Fri, 1 Jun 2018 13:03:30 -0700 (PDT) Date: Fri, 1 Jun 2018 23:03:16 +0300 From: "Michael S. Tsirkin" Message-ID: <20180601230119-mutt-send-email-mst@kernel.org> References: <20180523151613.3914-1-venu.busireddy@oracle.com> <20180601184033-mutt-send-email-mst@kernel.org> <20180601170126.GA10908@vbusired-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180601170126.GA10908@vbusired-vm> Subject: Re: [virtio-dev] [PATCH 0/1] Add "Group Identifier" to virtio PCI capabilities. To: Venu Busireddy Cc: virtio-dev@lists.oasis-open.org List-ID: On Fri, Jun 01, 2018 at 12:01:26PM -0500, Venu Busireddy wrote: > On 2018-06-01 18:42:06 +0300, Michael S. Tsirkin wrote: > > On Wed, May 23, 2018 at 11:16:12AM -0400, Venu Busireddy wrote: > > > During live migration involving passthrough devices, the guest needs > > > to know which virtio device will be a fail-over device for a given > > > passthrough device. > > > > > > Extending the virtio specification with a new "Group Identifier" > > > capability allows qemu to set up the grouping at the time the guest > > > is created. The "Group Identifier" can be as simple as a number, or an > > > UUID. The driver can use the group identifier to pair the virtio device > > > with the passthrough device. The passthrough device can contain the > > > group identifier in the PCIe bridge to which it is attached. > > > > > > Venu Busireddy (1): > > > Add "Group Identifier" to virtio PCI capabilities. > > > > > > content.tex | 43 +++++++++++++++++++++++++++++++++++++++++++ > > > 1 file changed, 43 insertions(+) > > > > Is this a PCI thing, or can this somehow be used with non-PCI > > This is applicable to all virtio PCI devices, but not to non-PCI > devices. > > > devices? If PCI, we can just add a PCI UUID capability to > > virtio without need to worry about the spec. > > What is a "PCI UUID capability?" "PCI Local Bus Specification > Revision 3.0, Appendix H" does not list any such capability. > > Regards, > > Venu Sorry that I'm unclear. What I meant is the PCI Express serial number capability (0003h). -- MST --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org