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Message-ID: <cp7slxgwbevlgifr76z2ldqihcukte6vrcr7dquat4pqmcr2ri@x3qwjrfkcmzl> Date: Fri, 7 Nov 2025 10:54:25 +0100 From: "Winiarski, Michal" <michal.winiarski@...el.com> To: "Muqthyar Ahmed, Syed Abdul" <syed.abdul.muqthyar.ahmed@...el.com> CC: Alex Williamson <alex@...zbot.org>, "De Marchi, Lucas" <lucas.demarchi@...el.com>, Thomas Hellström <thomas.hellstrom@...ux.intel.com>, "Vivi, Rodrigo" <rodrigo.vivi@...el.com>, Jason Gunthorpe <jgg@...pe.ca>, Yishai Hadas <yishaih@...dia.com>, "Tian, Kevin" <kevin.tian@...el.com>, Shameer Kolothum <skolothumtho@...dia.com>, "intel-xe@...ts.freedesktop.org" <intel-xe@...ts.freedesktop.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "Brost, Matthew" <matthew.brost@...el.com>, "Wajdeczko, Michal" <Michal.Wajdeczko@...el.com>, "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, "Jani Nikula" <jani.nikula@...ux.intel.com>, Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Tvrtko Ursulin <tursulin@...ulin.net>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, "Laguna, Lukasz" <lukasz.laguna@...el.com>, Christoph Hellwig <hch@...radead.org> Subject: Re: [PATCH v3 28/28] vfio/xe: Add device specific vfio_pci driver variant for Intel graphics On Fri, Nov 07, 2025 at 10:38:05AM +0100, Muqthyar Ahmed, Syed Abdul wrote: > > > > -----Original Message----- > > From: Intel-xe <intel-xe-bounces@...ts.freedesktop.org> On Behalf Of Michał > > Winiarski > > Sent: Friday, October 31, 2025 2:02 AM > > To: Alex Williamson <alex@...zbot.org>; De Marchi, Lucas > > <lucas.demarchi@...el.com>; Thomas Hellström > > <thomas.hellstrom@...ux.intel.com>; Vivi, Rodrigo <rodrigo.vivi@...el.com>; > > Jason Gunthorpe <jgg@...pe.ca>; Yishai Hadas <yishaih@...dia.com>; Tian, > > Kevin <kevin.tian@...el.com>; Shameer Kolothum > > <skolothumtho@...dia.com>; intel-xe@...ts.freedesktop.org; linux- > > kernel@...r.kernel.org; kvm@...r.kernel.org; Brost, Matthew > > <matthew.brost@...el.com>; Wajdeczko, Michal > > <Michal.Wajdeczko@...el.com> > > Cc: dri-devel@...ts.freedesktop.org; Jani Nikula <jani.nikula@...ux.intel.com>; > > Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>; Tvrtko Ursulin > > <tursulin@...ulin.net>; David Airlie <airlied@...il.com>; Simona Vetter > > <simona@...ll.ch>; Laguna, Lukasz <lukasz.laguna@...el.com>; Christoph > > Hellwig <hch@...radead.org>; Winiarski, Michal > > <michal.winiarski@...el.com> > > Subject: [PATCH v3 28/28] 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 bound to PF > > device to control VF device state and transfer the migration data. > > > > Signed-off-by: Michał Winiarski <michal.winiarski@...el.com> > > --- > > MAINTAINERS | 7 + > > drivers/vfio/pci/Kconfig | 2 + > > drivers/vfio/pci/Makefile | 2 + > > drivers/vfio/pci/xe/Kconfig | 12 + > > drivers/vfio/pci/xe/Makefile | 3 + > > drivers/vfio/pci/xe/main.c | 552 +++++++++++++++++++++++++++++++++++ > > 6 files changed, 578 insertions(+) > > create mode 100644 drivers/vfio/pci/xe/Kconfig create mode 100644 > > drivers/vfio/pci/xe/Makefile create mode 100644 drivers/vfio/pci/xe/main.c > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index b890ff265f03f..d73348c5f3f3e 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -27008,6 +27008,13 @@ L: virtualization@...ts.linux.dev > > S: Maintained > > F: drivers/vfio/pci/virtio > > > > +VFIO XE PCI DRIVER > > +M: Michał Winiarski <michal.winiarski@...el.com> > > +L: kvm@...r.kernel.org > > +L: intel-xe@...ts.freedesktop.org > > +S: Supported > > +F: drivers/vfio/pci/xe > > + > > VGA_SWITCHEROO > > R: Lukas Wunner <lukas@...ner.de> > > S: Maintained > > diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index > > 2b0172f546652..c100f0ab87f2d 100644 > > --- a/drivers/vfio/pci/Kconfig > > +++ b/drivers/vfio/pci/Kconfig > > @@ -67,4 +67,6 @@ source "drivers/vfio/pci/nvgrace-gpu/Kconfig" > > > > source "drivers/vfio/pci/qat/Kconfig" > > > > +source "drivers/vfio/pci/xe/Kconfig" > > + > > endmenu > > diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index > > cf00c0a7e55c8..f5d46aa9347b9 100644 > > --- a/drivers/vfio/pci/Makefile > > +++ b/drivers/vfio/pci/Makefile > > @@ -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/ > > diff --git a/drivers/vfio/pci/xe/Kconfig b/drivers/vfio/pci/xe/Kconfig new file > > mode 100644 index 0000000000000..787be88268685 > > --- /dev/null > > +++ b/drivers/vfio/pci/xe/Kconfig > > @@ -0,0 +1,12 @@ > > +# SPDX-License-Identifier: GPL-2.0-only config XE_VFIO_PCI > > + tristate "VFIO support for Intel Graphics" > > + depends on DRM_XE > > + select VFIO_PCI_CORE > Shall we make it default enabled with "default m " so that config gets enabled for first timers and no need to enable explicitly. No. The disable-by-default rule is intentional. VFIO driver variants are generally not part of "Hardware or infrastructure that everybody expects, such as CONFIG_NET or CONFIG_BLOCK". There's nothing about xe-vfio-pci that would make it an exception. For more information, see: https://docs.kernel.org/kbuild/kconfig-language.html#menu-attributes Thanks, -Michał
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