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

From: Bernatowicz, Marcin

Date: Fri Dec 19 2025 - 04:36:02 EST


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@xxxxxxxxx>
---
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Alex Williamson <alex@xxxxxxxxxxx>
Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Marcin Bernatowicz <marcin.bernatowicz@xxxxxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: kvm@xxxxxxxxxxxxxxx
---
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@xxxxxxxxxxxxxxx>
Tested-by: Marcin Bernatowicz <marcin.bernatowicz@xxxxxxxxxxxxxxx>

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.