From 88d7ab8949427f492c39f6daf0ac67f0242a88bc Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Wed, 26 Feb 2014 11:38:39 -0700 Subject: [PATCH] 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 --- drivers/vfio/vfio.c | 6 ++++++ include/linux/vfio.h | 2 ++ 2 files changed, 8 insertions(+) diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 21271d8df023..512f479d8a50 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 24579a0312a0..81022a52bc34 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 */ -- 2.20.1