On Tue, 19 Jan 2021 09:48:28 -0800
Steve Sistare <steven.sistare@xxxxxxxxxx> wrote:
> Implement a notify callback that remembers if the container's file
> descriptor has been closed.
>
> Signed-off-by: Steve Sistare <steven.sistare@xxxxxxxxxx>
> ---
> drivers/vfio/vfio_iommu_type1.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
> index c307f62..0167996 100644
> --- a/drivers/vfio/vfio_iommu_type1.c
> +++ b/drivers/vfio/vfio_iommu_type1.c
> @@ -74,6 +74,7 @@ struct vfio_iommu {
> bool nesting;
> bool dirty_page_tracking;
> bool pinned_page_dirty_scope;
> + bool controlled;
s/controlled/container_open/? Thanks,
Alex
> };
>
> struct vfio_domain {
> @@ -2518,6 +2519,7 @@ 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->controlled = true;
> mutex_init(&iommu->lock);
> BLOCKING_INIT_NOTIFIER_HEAD(&iommu->notifier);
>
> @@ -3043,6 +3045,18 @@ static int vfio_iommu_type1_dma_rw(void *iommu_data, dma_addr_t user_iova,
> return ret;
> }
>
> +static void vfio_iommu_type1_notify(void *iommu_data, unsigned int event,
> + void *data)
> +{
> + struct vfio_iommu *iommu = iommu_data;
> +
> + if (event != VFIO_DRIVER_NOTIFY_CONTAINER_CLOSE)
> + return;
> + mutex_lock(&iommu->lock);
> + iommu->controlled = false;
> + mutex_unlock(&iommu->lock);
> +}
> +
> static const struct vfio_iommu_driver_ops vfio_iommu_driver_ops_type1 = {
> .name = "vfio-iommu-type1",
> .owner = THIS_MODULE,
> @@ -3056,6 +3070,7 @@ static int vfio_iommu_type1_dma_rw(void *iommu_data, dma_addr_t user_iova,
> .register_notifier = vfio_iommu_type1_register_notifier,
> .unregister_notifier = vfio_iommu_type1_unregister_notifier,
> .dma_rw = vfio_iommu_type1_dma_rw,
> + .notify = vfio_iommu_type1_notify,
> };
>
> static int __init vfio_iommu_type1_init(void)
