user/sven/linux.git/include/linux/vfio.h, branch v5.16.4

vfio: move the vfio_iommu_driver_ops interface out of

2021-09-30T18:46:44Z

Create a new private drivers/vfio/vfio.h header for the interface between the VFIO core and the iommu drivers. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20210924155705.4258-10-hch@lst.de Signed-off-by: Alex Williamson

vfio: remove unused method from vfio_iommu_driver_ops

2021-09-30T18:46:44Z

The read, write and mmap methods are never implemented, so remove them. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20210924155705.4258-9-hch@lst.de Signed-off-by: Alex Williamson

vfio: simplify iommu group allocation for mediated devices

2021-09-30T18:46:44Z

Reuse the logic in vfio_noiommu_group_alloc to allocate a fake single-device iommu group for mediated devices by factoring out a common function, and replacing the noiommu boolean field in struct vfio_group with an enum to distinguish the three different kinds of groups. Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20210924155705.4258-8-hch@lst.de Signed-off-by: Alex Williamson

vfio: Move vfio_iommu_group_get() to vfio_register_group_dev()

2021-09-30T18:46:43Z

We don't need to hold a reference to the group in the driver as well as obtain a reference to the same group as the first thing vfio_register_group_dev() does. Since the drivers never use the group move this all into the core code. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20210924155705.4258-2-hch@lst.de Signed-off-by: Alex Williamson

vfio: Remove struct vfio_device_ops open/release

2021-08-11T15:50:11Z

Nothing uses this anymore, delete it. Signed-off-by: Yishai Hadas Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe Reviewed-by: Cornelia Huck Link: https://lore.kernel.org/r/14-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio: Provide better generic support for open/release vfio_device_ops

2021-08-11T15:50:10Z

Currently the driver ops have an open/release pair that is called once each time a device FD is opened or closed. Add an additional set of open/close_device() ops which are called when the device FD is opened for the first time and closed for the last time. An analysis shows that all of the drivers require this semantic. Some are open coding it as part of their reflck implementation, and some are just buggy and miss it completely. To retain the current semantics PCI and FSL depend on, introduce the idea of a "device set" which is a grouping of vfio_device's that share the same lock around opening. The device set is established by providing a 'set_id' pointer. All vfio_device's that provide the same pointer will be joined to the same singleton memory and lock across the whole set. This effectively replaces the oddly named reflck. After conversion the set_id will be sourced from: - A struct device from a fsl_mc_device (fsl) - A struct pci_slot (pci) - A struct pci_bus (pci) - The struct vfio_device (everything) The design ensures that the above pointers are live as long as the vfio_device is registered, so they form reliable unique keys to group vfio_devices into sets. This implementation uses xarray instead of searching through the driver core structures, which simplifies the somewhat tricky locking in this area. Following patches convert all the drivers. Signed-off-by: Yishai Hadas Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/4-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio: Introduce a vfio_uninit_group_dev() API call

2021-08-11T15:50:10Z

This pairs with vfio_init_group_dev() and allows undoing any state that is stored in the vfio_device unrelated to registration. Add appropriately placed calls to all the drivers. The following patch will use this to add pre-registration state for the device set. Signed-off-by: Max Gurtovoy Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/3-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio: Remove device_data from the vfio bus driver API

2021-04-06T17:55:11Z

There are no longer any users, so it can go away. Everything is using container_of now. Reviewed-by: Christoph Hellwig Reviewed-by: Kevin Tian Reviewed-by: Cornelia Huck Reviewed-by: Max Gurtovoy Signed-off-by: Jason Gunthorpe Message-Id: <14-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> Signed-off-by: Alex Williamson

vfio: Make vfio_device_ops pass a 'struct vfio_device ' instead of 'void '

2021-04-06T17:55:11Z

This is the standard kernel pattern, the ops associated with a struct get the struct pointer in for typesafety. The expected design is to use container_of to cleanly go from the subsystem level type to the driver level type without having any type erasure in a void *. Reviewed-by: Dan Williams Reviewed-by: Christoph Hellwig Reviewed-by: Cornelia Huck Signed-off-by: Jason Gunthorpe Message-Id: <12-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> Signed-off-by: Alex Williamson

vfio/mdev: Use vfio_init/register/unregister_group_dev

2021-04-06T17:55:11Z

mdev gets little benefit because it doesn't actually do anything, however it is the last user, so move the vfio_init/register/unregister_group_dev() code here for now. Reviewed-by: Christoph Hellwig Reviewed-by: Liu Yi L Reviewed-by: Kevin Tian Reviewed-by: Cornelia Huck Signed-off-by: Jason Gunthorpe Message-Id: <10-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> Signed-off-by: Alex Williamson

user/sven/linux.git/include/linux/vfio.h, branch v5.16.4

vfio: move the vfio_iommu_driver_ops interface out of

vfio: remove unused method from vfio_iommu_driver_ops

vfio: simplify iommu group allocation for mediated devices

vfio: Move vfio_iommu_group_get() to vfio_register_group_dev()

vfio: Remove struct vfio_device_ops open/release

vfio: Provide better generic support for open/release vfio_device_ops

vfio: Introduce a vfio_uninit_group_dev() API call

vfio: Remove device_data from the vfio bus driver API

vfio: Make vfio_device_ops pass a 'struct vfio_device *' instead of 'void *'

vfio/mdev: Use vfio_init/register/unregister_group_dev

vfio: Make vfio_device_ops pass a 'struct vfio_device ' instead of 'void '