[Kimchi-devel] Host Device Passthrough UI Task Discussion

[Paulo Ricardo Paz Vital]

+1

On Wed, 2014-07-16 at 12:14 -0300, Aline Manera wrote:
> +1
> 
> On 07/16/2014 03:33 AM, Zhou Zheng Sheng wrote:
> > Hi,
> >
> > As in Kimchi 1.3 TODO list
> > (https://github.com/kimchi-project/kimchi/wiki/Todo-1.3), there is a
> > task of passthrough support. It is to enable Kimchi to assign hos
> > devices directly to a VM, thus greately improve VM performance.
> > Currently we support assigning PCI device, USB device and SCSI LUN. For
> > example, we can assign an NIC to VM to improve guest network throughput,
> > or passthrough a USB camera to enable the guest OS to record video.
> >
> > The back-end patch also handles PCI device grouping (attach and detach
> > all devices in the same iommu group together) and provides some other
> > useful features. Since the due day is near, I think we can come up with
> > an easy and simple UI for 1.3, and mark this feature as experimental.
> > Then we improve it in future releases. So in this release we may only
> > expose PCI devices to user and don't mention the iommu grouping logic.
> >
> > For this version I think we may provide the following operations to the
> > user.
> >
> > In the VM edit window, initially, the user sees a list of PCI devices
> > already assigned to the VM. This maps to GET vms/VM_NAME/hostdevs.
> >
> > In edit mode, the user can detach device. This maps to DELETE
> > vms/VM_NAME/hostdevs/DEVICE_NAME.
> >
> > The user can also select device to attach to VM from a list. The listing
> > of eligible devices is mapped to GET
> > host/devices?_passthrough=true&_cap=pci.
> >
> > To attach a device, just POST a dict containing only the device name to
> > vms/VM_NAME/hostdevs.
> >
> > I think these operations forms a basic interaction to enable user to
> > consume this feature. It may be feasible to finish them before the due day.
> >
> 
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