On Thu, 9 Jun 2016 15:09:29 +0300
Ilya Lesokhin <ilyal@xxxxxxxxxxxx> wrote:
> When a new device is added to a live VFIO group,
> use driver_override to force the device to be probed by
> the VFIO driver.
>
> Signed-off-by: Ilya Lesokhin <ilyal@xxxxxxxxxxxx>
> ---
> drivers/vfio/vfio.c | 18 ++++++++++++++----
> 1 file changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
> index 6fd6fa5..32bc1b4 100644
> --- a/drivers/vfio/vfio.c
> +++ b/drivers/vfio/vfio.c
> @@ -646,6 +646,7 @@ static int vfio_dev_viable(struct device *dev, void *data)
> static int vfio_group_nb_add_dev(struct vfio_group *group, struct device *dev)
> {
> struct vfio_device *device;
> + struct pci_dev *pdev;
>
> /* Do we already know about it? We shouldn't */
> device = vfio_group_get_device(group, dev);
> @@ -658,10 +659,19 @@ static int vfio_group_nb_add_dev(struct vfio_group *group, struct device *dev)
> if (!atomic_read(&group->container_users))
> return 0;
>
> - /* TODO Prevent device auto probing */
> - WARN(1, "Device %s added to live group %d!\n", dev_name(dev),
> - iommu_group_id(group->iommu_group));
> -
> + if (dev_is_pci(dev)) {
declare pdev here.
> + /* a device that shares a group with another VFIO
> + * device should also be probed by VFIO
> + */
Use existing comment style:
/*
* comment
*/
> + pdev = to_pci_dev(dev);
> + if (pdev->driver_override)
> + kfree(pdev->driver_override);
> + pdev->driver_override = kstrdup("vfio-pci", GFP_KERNEL);
kstrdup can fail. Probably want to issue a dev_info message about
capturing the device as well. Thanks,
Alex
> + } else {
> + /* TODO Prevent device auto probing */
> + WARN(1, "Device %s added to live group %d!\n", dev_name(dev),
> + iommu_group_id(group->iommu_group));
> + }
> return 0;
> }
>
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