Commit 1f5556ec authored Nov 27, 2025 by Michał Winiarski Committed by Thomas Hellström Dec 01, 2025

vfio/xe: Add device specific vfio_pci driver variant for Intel graphics



In addition to generic VFIO PCI functionality, the driver implements
VFIO migration uAPI, allowing userspace to enable migration for Intel
Graphics SR-IOV Virtual Functions.
The driver binds to VF device and uses API exposed by Xe driver to
transfer the VF migration data under the control of PF device.

Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex@shazbot.org>
Link: https://patch.msgid.link/20251127093934.1462188-5-michal.winiarski@intel.com
Link: https://lore.kernel.org/all/20251128125322.34edbeaf.alex@shazbot.org/


Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
(cherry picked from commit 2e38c50a)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

parent bd45d46f

MAINTAINERS

+7 −0

Original line number	Diff line number	Diff line
		@@ -27015,6 +27015,13 @@ L: virtualization@lists.linux.dev
		S: Maintained
		F: drivers/vfio/pci/virtio

		VFIO XE PCI DRIVER
		M: Michał Winiarski <michal.winiarski@intel.com>
		L: kvm@vger.kernel.org
		L: intel-xe@lists.freedesktop.org
		S: Supported
		F: drivers/vfio/pci/xe

		VGA_SWITCHEROO
		R: Lukas Wunner <lukas@wunner.de>
		S: Maintained

drivers/vfio/pci/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -67,4 +67,6 @@ source "drivers/vfio/pci/nvgrace-gpu/Kconfig"

		source "drivers/vfio/pci/qat/Kconfig"

		source "drivers/vfio/pci/xe/Kconfig"

		endmenu

drivers/vfio/pci/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -19,3 +19,5 @@ obj-$(CONFIG_VIRTIO_VFIO_PCI) += virtio/
		obj-$(CONFIG_NVGRACE_GPU_VFIO_PCI) += nvgrace-gpu/

		obj-$(CONFIG_QAT_VFIO_PCI) += qat/

		obj-$(CONFIG_XE_VFIO_PCI) += xe/

drivers/vfio/pci/xe/Kconfig

0 → 100644

+12 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0-only
		config XE_VFIO_PCI
		tristate "VFIO support for Intel Graphics"
		depends on DRM_XE && PCI_IOV
		select VFIO_PCI_CORE
		help
		This option enables device specific VFIO driver variant for Intel Graphics.
		In addition to generic VFIO PCI functionality, it implements VFIO
		migration uAPI allowing userspace to enable migration for
		Intel Graphics SR-IOV Virtual Functions supported by the Xe driver.

		If you don't know what to do here, say N.

drivers/vfio/pci/xe/Makefile

0 → 100644

+3 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0-only
		obj-$(CONFIG_XE_VFIO_PCI) += xe-vfio-pci.o
		xe-vfio-pci-y := main.o