linux-dev/drivers/vfio/fsl-mc, branch master

vfio/fsl-mc: Use the new device life cycle helpers

2022-09-21T20:15:11Z

Also add a comment to mark that vfio core releases device_set if @init fails. Signed-off-by: Yi Liu Signed-off-by: Kevin Tian Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20220921104401.38898-11-kevin.tian@intel.com Signed-off-by: Alex Williamson

vfio/fsl-mc: Fix a typo in a message

2022-09-08T16:41:41Z

L and S are swapped in the message. s/VFIO_FLS_MC/VFIO_FSL_MC/ Also use 'ret' instead of 'WARN_ON(ret)' to avoid a duplicated message. Signed-off-by: Christophe JAILLET Reviewed-by: Diana Craciun Acked-by: Cornelia Huck Link: https://lore.kernel.org/r/a7c1394346725b7435792628c8d4c06a0a745e0b.1662134821.git.christophe.jaillet@wanadoo.fr Signed-off-by: Alex Williamson

vfio: de-extern-ify function prototypes

2022-06-27T15:38:02Z

The use of 'extern' in function prototypes has been disrecommended in the kernel coding style for several years now, remove them from all vfio related files so contributors no longer need to decide between style and consistency. Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Reviewed-by: Eric Farman Reviewed-by: Eric Auger Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/165471414407.203056.474032786990662279.stgit@omen Signed-off-by: Alex Williamson

vfio: Set DMA ownership for VFIO devices

2022-04-28T13:32:20Z

Claim group dma ownership when an IOMMU group is set to a container, and release the dma ownership once the iommu group is unset from the container. This change disallows some unsafe bridge drivers to bind to non-ACS bridges while devices under them are assigned to user space. This is an intentional enhancement and possibly breaks some existing configurations. The recommendation to such an affected user would be that the previously allowed host bridge driver was unsafe for this use case and to continue to enable assignment of devices within that group, the driver should be unbound from the bridge device or replaced with the pci-stub driver. For any bridge driver, we consider it unsafe if it satisfies any of the following conditions: 1) The bridge driver uses DMA. Calling pci_set_master() or calling any kernel DMA API (dma_map_*() and etc.) is an indicate that the driver is doing DMA. 2) If the bridge driver uses MMIO, it should be tolerant to hostile userspace also touching the same MMIO registers via P2P DMA attacks. If the bridge driver turns out to be a safe one, it could be used as before by setting the driver's .driver_managed_dma field, just like what we have done in the pcieport driver. Signed-off-by: Lu Baolu Reviewed-by: Jason Gunthorpe Acked-by: Alex Williamson Link: https://lore.kernel.org/r/20220418005000.897664-8-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel

bus: fsl-mc: fsl-mc-allocator: Rework MSI handling

2021-12-16T21:16:41Z

Storing a pointer to the MSI descriptor just to track the Linux interrupt number is daft. Just store the interrupt number and be done with it. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20211210221815.207838579@linutronix.de

Merge branch 'v5.16/vfio/diana-fsl-reset-v2' into v5.16/vfio/next

2021-10-11T21:50:49Z

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/fsl-mc: Add per device reset support

2021-09-28T22:56:05Z

Currently when a fsl-mc device is reset, the entire DPRC container is reset which is very inefficient because the devices within a container will be reset multiple times. Add support for individually resetting a device. Signed-off-by: Diana Craciun Reviewed-by: Laurentiu Tudor Link: https://lore.kernel.org/r/20210922110530.24736-2-diana.craciun@oss.nxp.com Signed-off-by: Alex Williamson

vfio: Use kconfig if XX/endif blocks instead of repeating 'depends on'

2021-08-26T16:36:51Z

This results in less kconfig wordage and a simpler understanding of the required "depends on" to create the menu structure. The next patch increases the nesting level a lot so this is a nice preparatory simplification. Signed-off-by: Jason Gunthorpe Reviewed-by: Christoph Hellwig Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20210826103912.128972-13-yishaih@nvidia.com Signed-off-by: Alex Williamson

vfio: Use select for eventfd

2021-08-26T16:36:51Z

If VFIO_VIRQFD is required then turn on eventfd automatically. The majority of kconfig users of the EVENTFD use select not depends on. Signed-off-by: Jason Gunthorpe Reviewed-by: Christoph Hellwig Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20210826103912.128972-12-yishaih@nvidia.com Signed-off-by: Alex Williamson