Hi Jean,
On 8/21/20 3:15 PM, Jean-Philippe Brucker wrote:
> 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-phili...@linaro.org>
Reviewed-by: Eric Auger <eric.au...@redhat.com>
Thanks
Eric
> ---
> 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 */
>
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