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
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