Re: [PATCH] vfio/xe: Add default handler for .get_region_info_caps

["Bernatowicz, Marcin" <marcin.bernatowicz@linux.intel.com>]

On 12/18/2025 9:51 PM, Michal Wajdeczko wrote:
> New requirement for the vfio drivers was added by the commit
> f97859503859 ("vfio: Require drivers to implement get_region_info")
> followed by commit 1b0ecb5baf4a ("vfio/pci: Convert all PCI drivers
> to get_region_info_caps") that was missed by the new vfio/xe driver.
>
> Add handler for .get_region_info_caps to avoid -EINVAL errors.
>
> Fixes: 2e38c50ae492 ("vfio/xe: Add device specific vfio_pci driver variant for Intel graphics")
> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
> ---
> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: Jason Gunthorpe <jgg@nvidia.com>
> Cc: Kevin Tian <kevin.tian@intel.com>
> Cc: Alex Williamson <alex@shazbot.org>
> Cc: Michał Winiarski <michal.winiarski@intel.com>
> Cc: Marcin Bernatowicz <marcin.bernatowicz@linux.intel.com>
> Cc: dri-devel@lists.freedesktop.org
> Cc: linux-kernel@vger.kernel.org
> Cc: kvm@vger.kernel.org
> ---
>   drivers/vfio/pci/xe/main.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/vfio/pci/xe/main.c b/drivers/vfio/pci/xe/main.c
> index 0156b53c678b..719ab4660085 100644
> --- a/drivers/vfio/pci/xe/main.c
> +++ b/drivers/vfio/pci/xe/main.c
> @@ -504,6 +504,7 @@ static const struct vfio_device_ops xe_vfio_pci_ops = {
>   	.open_device = xe_vfio_pci_open_device,
>   	.close_device = xe_vfio_pci_close_device,
>   	.ioctl = vfio_pci_core_ioctl,
> +	.get_region_info_caps = vfio_pci_ioctl_get_region_info,
>   	.device_feature = vfio_pci_core_ioctl_feature,
>   	.read = vfio_pci_core_read,
>   	.write = vfio_pci_core_write,
Reviewed-by: Marcin Bernatowicz <marcin.bernatowicz@linux.intel.com>
Tested-by: Marcin Bernatowicz <marcin.bernatowicz@linux.intel.com>

I tested it on v6.19-rc1 with QEMU 8.2.2
passing through an Intel Xe VF. The patch fixes the -EINVAL failure
on VFIO_DEVICE_GET_REGION_INFO.