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authorAlex Williamson <alex.williamson@redhat.com>2014-02-26 11:38:39 -0700
committerAlex Williamson <alex.williamson@redhat.com>2014-02-26 11:38:39 -0700
commit88d7ab8949427f492c39f6daf0ac67f0242a88bc (patch)
treecfa7d27b7a59ff6ffe666374a19e08b2e5f1ee64
parentaa429318279b90192f35a97e9ccdc1e83b3a9624 (diff)
downloadop-kernel-dev-88d7ab8949427f492c39f6daf0ac67f0242a88bc.zip
op-kernel-dev-88d7ab8949427f492c39f6daf0ac67f0242a88bc.tar.gz
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: Alex Williamson <alex.williamson@redhat.com>
-rw-r--r--drivers/vfio/vfio.c6
-rw-r--r--include/linux/vfio.h2
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 21271d8..512f479 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -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
*/
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 24579a0..81022a52 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -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 */
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