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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-01-18 18:50:28 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-02-03 20:45:23 +0100 |
| commit | c9a397cee9f5c93a7f48e18038b14057044db6ba (patch) | |
| tree | 8b7e0c201d5e50562c6fc0c553da53fd37dfd980 /drivers/vfio/vfio.h | |
| parent | Linux 6.2-rc3 (diff) | |
| download | linux-c9a397cee9f5c93a7f48e18038b14057044db6ba.tar.xz linux-c9a397cee9f5c93a7f48e18038b14057044db6ba.zip | |
vfio: Support VFIO_NOIOMMU with iommufd
Add a small amount of emulation to vfio_compat to accept the SET_IOMMU to
VFIO_NOIOMMU_IOMMU and have vfio just ignore iommufd if it is working on a
no-iommu enabled device.
Move the enable_unsafe_noiommu_mode module out of container.c into
vfio_main.c so that it is always available even if VFIO_CONTAINER=n.
This passes Alex's mini-test:
https://github.com/awilliam/tests/blob/master/vfio-noiommu-pci-device-open.c
Link: https://lore.kernel.org/r/0-v3-480cd64a16f7+1ad0-iommufd_noiommu_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/vfio/vfio.h')
| -rw-r--r-- | drivers/vfio/vfio.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index f8219a438bfb..9e94abcf8ee1 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -10,10 +10,10 @@ #include <linux/device.h> #include <linux/cdev.h> #include <linux/module.h> +#include <linux/vfio.h> struct iommufd_ctx; struct iommu_group; -struct vfio_device; struct vfio_container; void vfio_device_put_registration(struct vfio_device *device); @@ -88,6 +88,12 @@ bool vfio_device_has_container(struct vfio_device *device); int __init vfio_group_init(void); void vfio_group_cleanup(void); +static inline bool vfio_device_is_noiommu(struct vfio_device *vdev) +{ + return IS_ENABLED(CONFIG_VFIO_NOIOMMU) && + vdev->group->type == VFIO_NO_IOMMU; +} + #if IS_ENABLED(CONFIG_VFIO_CONTAINER) /* events for the backend driver notify callback */ enum vfio_iommu_notify_type { |