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vfio/type1: implement notify callback 

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

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Steve Sistare 2021-01-29 08:54:11 -08:00 committed by Alex Williamson
parent ec5e32940c
commit 487ace1340
1 changed files with 15 additions and 0 deletions
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15
drivers/vfio/vfio_iommu_type1.c
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@ -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)