Keeping a record of list of endpoints that are served by the virtio-iommu device would help in redirecting the requests of page faults to the correct endpoint device to handle such requests.
Signed-off-by: Vivek Gautam <vivek.gau...@arm.com> --- drivers/iommu/virtio-iommu.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 50039070e2aa..c970f386f031 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -48,6 +48,7 @@ struct viommu_dev { spinlock_t request_lock; struct list_head requests; void *evts; + struct list_head endpoints; /* Device configuration */ struct iommu_domain_geometry geometry; @@ -115,6 +116,12 @@ struct viommu_endpoint { void *pgtf; }; +struct viommu_ep_entry { + u32 eid; + struct viommu_endpoint *vdev; + struct list_head list; +}; + struct viommu_request { struct list_head list; void *writeback; @@ -573,6 +580,7 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) size_t probe_len; struct virtio_iommu_req_probe *probe; struct virtio_iommu_probe_property *prop; + struct viommu_ep_entry *ep; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct viommu_endpoint *vdev = dev_iommu_priv_get(dev); @@ -640,6 +648,18 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) prop = (void *)probe->properties + cur; type = le16_to_cpu(prop->type) & VIRTIO_IOMMU_PROBE_T_MASK; } + if (ret) + goto out_free; + + ep = kzalloc(sizeof(*ep), GFP_KERNEL); + if (!ep) { + ret = -ENOMEM; + goto out_free; + } + ep->eid = probe->endpoint; + ep->vdev = vdev; + + list_add(&ep->list, &viommu->endpoints); out_free: kfree(probe); @@ -1649,6 +1669,7 @@ static int viommu_probe(struct virtio_device *vdev) viommu->dev = dev; viommu->vdev = vdev; INIT_LIST_HEAD(&viommu->requests); + INIT_LIST_HEAD(&viommu->endpoints); ret = viommu_init_vqs(viommu); if (ret) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu