diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-09-24 18:57:01 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2021-09-30 21:46:44 +0300 |
| commit | c3c0fa9d94f7078b6664d29d79484d071a144f2e (patch) | |
| tree | 30e9089670973348a96dc8968eef50d73e51fa69 /drivers/vfio/vfio.h | |
| parent | fda49d97f2c4faf0b42e8796d3e6c868d992f3af (diff) | |
| download | linux-c3c0fa9d94f7078b6664d29d79484d071a144f2e.tar.xz | |
vfio: clean up the check for mediated device in vfio_iommu_type1
Pass the group flags to ->attach_group and remove the messy check for
the bus type.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20210924155705.4258-12-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio.h')
| -rw-r--r-- | drivers/vfio/vfio.h | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index a78de649eb2f..a67130221151 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -4,6 +4,30 @@ * Author: Alex Williamson <alex.williamson@redhat.com> */ +enum vfio_group_type { + /* + * Physical device with IOMMU backing. + */ + VFIO_IOMMU, + + /* + * Virtual device without IOMMU backing. The VFIO core fakes up an + * iommu_group as the iommu_group sysfs interface is part of the + * userspace ABI. The user of these devices must not be able to + * directly trigger unmediated DMA. + */ + VFIO_EMULATED_IOMMU, + + /* + * Physical device without IOMMU backing. The VFIO core fakes up an + * iommu_group as the iommu_group sysfs interface is part of the + * userspace ABI. Users can trigger unmediated DMA by the device, + * usage is highly dangerous, requires an explicit opt-in and will + * taint the kernel. + */ + VFIO_NO_IOMMU, +}; + /* events for the backend driver notify callback */ enum vfio_iommu_notify_type { VFIO_IOMMU_CONTAINER_CLOSE = 0, @@ -20,7 +44,8 @@ struct vfio_iommu_driver_ops { long (*ioctl)(void *iommu_data, unsigned int cmd, unsigned long arg); int (*attach_group)(void *iommu_data, - struct iommu_group *group); + struct iommu_group *group, + enum vfio_group_type); void (*detach_group)(void *iommu_data, struct iommu_group *group); int (*pin_pages)(void *iommu_data, |