Displaying 5 results from an estimated 5 matches for "virtio_iommu_topo_head".
2019 Nov 22
0
[RFC virtio 12/13] virtio-iommu: Add built-in topology description
...eld{topo_offset}
+is the offset between the beginning of the device-specific configuration
+space (virtio_iommu_config) and the first topology structure header. A
+topology structures defines the endpoint ID of one or more endpoints
+managed by the virtio-iommu device.
+
+\begin{lstlisting}
+struct virtio_iommu_topo_head {
+ le16 type;
+ le16 next;
+};
+\end{lstlisting}
+
+\field{next} is the offset between the beginning of the device-specific
+configuration space and the next topology structure header. When
+\field{next} is zero, this is the last structure.
+
+\field{type} describes the type of structure:
+\begi...
2019 Nov 22
1
[RFC 13/13] iommu/virtio: Add topology description to
...t; +};
> +
> +struct viommu_spec {
> + struct device *dev; /* transport device */
> + struct fwnode_handle *fwnode;
> + struct iommu_ops *ops;
> + struct list_head topology;
> + struct list_head list;
> +};
> +
> +struct viommu_topology {
> + union {
> + struct virtio_iommu_topo_head head;
> + struct virtio_iommu_topo_pci_range pci;
> + struct virtio_iommu_topo_endpoint ep;
> + };
> + /* Index into viommu_spec->topology */
> + struct list_head list;
> +};
> +
> +static LIST_HEAD(viommus);
> +static DEFINE_MUTEX(viommus_lock);
> +
> +#define...
2019 Nov 22
0
[RFC 13/13] iommu/virtio: Add topology description to
...re size */
+ u32 offset; /* structure offset within the bar */
+};
+
+struct viommu_spec {
+ struct device *dev; /* transport device */
+ struct fwnode_handle *fwnode;
+ struct iommu_ops *ops;
+ struct list_head topology;
+ struct list_head list;
+};
+
+struct viommu_topology {
+ union {
+ struct virtio_iommu_topo_head head;
+ struct virtio_iommu_topo_pci_range pci;
+ struct virtio_iommu_topo_endpoint ep;
+ };
+ /* Index into viommu_spec->topology */
+ struct list_head list;
+};
+
+static LIST_HEAD(viommus);
+static DEFINE_MUTEX(viommus_lock);
+
+#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, fiel...
2019 Nov 22
16
[RFC 00/13] virtio-iommu on non-devicetree platforms
I'm seeking feedback on multi-platform support for virtio-iommu. At the
moment only devicetree (DT) is supported and we don't have a pleasant
solution for other platforms. Once we figure out the topology
description, x86 support is trivial.
Since the IOMMU manages memory accesses from other devices, the guest
kernel needs to initialize the IOMMU before endpoints start issuing DMA.
2019 Nov 22
16
[RFC 00/13] virtio-iommu on non-devicetree platforms
I'm seeking feedback on multi-platform support for virtio-iommu. At the
moment only devicetree (DT) is supported and we don't have a pleasant
solution for other platforms. Once we figure out the topology
description, x86 support is trivial.
Since the IOMMU manages memory accesses from other devices, the guest
kernel needs to initialize the IOMMU before endpoints start issuing DMA.