Add struct definitions for describing endpoints managed by the
virtio-iommu. When VIRTIO_IOMMU_F_TOPOLOGY is offered, an array of
virtio_iommu_topo_* structures in config space describes the endpoints,
identified either by their PCI BDF or their physical MMIO address.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>
---
include/uapi/linux/virtio_iommu.h | 44 +++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h
index 237e36a280cb..70cba30644d5 100644
--- a/include/uapi/linux/virtio_iommu.h
+++ b/include/uapi/linux/virtio_iommu.h
@@ -16,6 +16,7 @@
#define VIRTIO_IOMMU_F_BYPASS 3
#define VIRTIO_IOMMU_F_PROBE 4
#define VIRTIO_IOMMU_F_MMIO 5
+#define VIRTIO_IOMMU_F_TOPOLOGY 6
struct virtio_iommu_range_64 {
__le64 start;
@@ -27,6 +28,17 @@ struct virtio_iommu_range_32 {
__le32 end;
};
+struct virtio_iommu_topo_config {
+ /* Number of topology description structures */
+ __le16 count;
+ /*
+ * Offset to the first topology description structure
+ * (virtio_iommu_topo_*) from the start of the virtio_iommu config
+ * space. Aligned on 8 bytes.
+ */
+ __le16 offset;
+};
+
struct virtio_iommu_config {
/* Supported page sizes */
__le64 page_size_mask;
@@ -36,6 +48,38 @@ struct virtio_iommu_config {
struct virtio_iommu_range_32 domain_range;
/* Probe buffer size */
__le32 probe_size;
+ struct virtio_iommu_topo_config topo_config;
+};
+
+#define VIRTIO_IOMMU_TOPO_PCI_RANGE 0x1
+#define VIRTIO_IOMMU_TOPO_MMIO 0x2
+
+struct virtio_iommu_topo_pci_range {
+ /* VIRTIO_IOMMU_TOPO_PCI_RANGE */
+ __u8 type;
+ __u8 reserved;
+ /* Length of this structure */
+ __le16 length;
+ /* First endpoint ID in the range */
+ __le32 endpoint_start;
+ /* PCI domain number */
+ __le16 segment;
+ /* PCI Bus:Device.Function range */
+ __le16 bdf_start;
+ __le16 bdf_end;
+ __le16 padding;
+};
+
+struct virtio_iommu_topo_mmio {
+ /* VIRTIO_IOMMU_TOPO_MMIO */
+ __u8 type;
+ __u8 reserved;
+ /* Length of this structure */
+ __le16 length;
+ /* Endpoint ID */
+ __le32 endpoint;
+ /* Address of the first MMIO region */
+ __le64 address;
};
/* Request types */
--
2.28.0
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