Commit 487ace13 authored by Steve Sistare's avatar Steve Sistare Committed by Alex Williamson
Browse files

vfio/type1: implement notify callback 



Implement a notify callback that remembers if the container's file
descriptor has been closed.

Signed-off-by: default avatarSteve Sistare <steven.sistare@oracle.com>
Reviewed-by: default avatarCornelia Huck <cohuck@redhat.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent ec5e3294

drivers/vfio/vfio_iommu_type1.c

+15 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ struct vfio_iommu { 
	bool			nesting;

	bool			dirty_page_tracking;

	bool			pinned_page_dirty_scope;

	bool			container_open;

};



struct vfio_domain {
@@ -2520,6 +2521,7 @@ static void *vfio_iommu_type1_open(unsigned long arg) 
	INIT_LIST_HEAD(&iommu->iova_list);

	iommu->dma_list = RB_ROOT;

	iommu->dma_avail = dma_entry_limit;

	iommu->container_open = true;

	mutex_init(&iommu->lock);

	BLOCKING_INIT_NOTIFIER_HEAD(&iommu->notifier);
@@ -3087,6 +3089,18 @@ vfio_iommu_type1_group_iommu_domain(void *iommu_data, 
	return domain;

}



static void vfio_iommu_type1_notify(void *iommu_data,

				    enum vfio_iommu_notify_type event)

{

	struct vfio_iommu *iommu = iommu_data;



	if (event != VFIO_IOMMU_CONTAINER_CLOSE)

		return;

	mutex_lock(&iommu->lock);

	iommu->container_open = false;

	mutex_unlock(&iommu->lock);

}



static const struct vfio_iommu_driver_ops vfio_iommu_driver_ops_type1 = {

	.name			= "vfio-iommu-type1",

	.owner			= THIS_MODULE,
@@ -3101,6 +3115,7 @@ static const struct vfio_iommu_driver_ops vfio_iommu_driver_ops_type1 = { 
	.unregister_notifier	= vfio_iommu_type1_unregister_notifier,

	.dma_rw			= vfio_iommu_type1_dma_rw,

	.group_iommu_domain	= vfio_iommu_type1_group_iommu_domain,

	.notify			= vfio_iommu_type1_notify,

};



static int __init vfio_iommu_type1_init(void)