Commit 6fadb021 authored Feb 24, 2022 by Yishai Hadas Committed by Leon Romanovsky Mar 03, 2022

vfio/mlx5: Implement vfio_pci driver for mlx5 devices

This patch adds support for vfio_pci driver for mlx5 devices.

It uses vfio_pci_core to register to the VFIO subsystem and then
implements the mlx5 specific logic in the migration area.

The migration implementation follows the definition from uapi/vfio.h and
uses the mlx5 VF->PF command channel to achieve it.

This patch implements the suspend/resume flows.

Link: https://lore.kernel.org/all/20220224142024.147653-14-yishaih@nvidia.com


Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

parent f1d98f34

MAINTAINERS

+6 −0

Original line number	Diff line number	Diff line
		@@ -20320,6 +20320,12 @@ L: kvm@vger.kernel.org
		S: Maintained
		F: drivers/vfio/platform/

		VFIO MLX5 PCI DRIVER
		M: Yishai Hadas <yishaih@nvidia.com>
		L: kvm@vger.kernel.org
		S: Maintained
		F: drivers/vfio/pci/mlx5/

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

drivers/vfio/pci/Kconfig

+3 −0

Original line number	Diff line number	Diff line
		@@ -43,4 +43,7 @@ config VFIO_PCI_IGD

		To enable Intel IGD assignment through vfio-pci, say Y.
		endif

		source "drivers/vfio/pci/mlx5/Kconfig"

		endif

drivers/vfio/pci/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -7,3 +7,5 @@ obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o
		vfio-pci-y := vfio_pci.o
		vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o
		obj-$(CONFIG_VFIO_PCI) += vfio-pci.o

		obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5/

drivers/vfio/pci/mlx5/Kconfig

0 → 100644

+10 −0

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		# SPDX-License-Identifier: GPL-2.0-only
		config MLX5_VFIO_PCI
		tristate "VFIO support for MLX5 PCI devices"
		depends on MLX5_CORE
		depends on VFIO_PCI_CORE
		help
		This provides migration support for MLX5 devices using the VFIO
		framework.

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

drivers/vfio/pci/mlx5/Makefile

0 → 100644

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		# SPDX-License-Identifier: GPL-2.0-only
		obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5-vfio-pci.o
		mlx5-vfio-pci-y := main.o cmd.o