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Commit 88d7ab89 authored by Alex Williamson's avatar Alex Williamson
Browse files

vfio: Add external user check extension interface 



This lets us check extensions, particularly VFIO_DMA_CC_IOMMU using
the external user interface, allowing KVM to probe IOMMU coherency.

Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent aa429318

drivers/vfio/vfio.c

+6 −0
Original line number Diff line number Diff line
@@ -1413,6 +1413,12 @@ int vfio_external_user_iommu_id(struct vfio_group *group) 
}

EXPORT_SYMBOL_GPL(vfio_external_user_iommu_id);



long vfio_external_check_extension(struct vfio_group *group, unsigned long arg)

{

	return vfio_ioctl_check_extension(group->container, arg);

}

EXPORT_SYMBOL_GPL(vfio_external_check_extension);



/**

 * Module/class support

 */

include/linux/vfio.h

+2 −0
Original line number Diff line number Diff line
@@ -96,5 +96,7 @@ extern void vfio_unregister_iommu_driver( 
extern struct vfio_group *vfio_group_get_external_user(struct file *filep);

extern void vfio_group_put_external_user(struct vfio_group *group);

extern int vfio_external_user_iommu_id(struct vfio_group *group);

extern long vfio_external_check_extension(struct vfio_group *group,

					  unsigned long arg);



#endif /* VFIO_H */