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| author | Jean-Philippe Brucker <jean-philippe.brucker@arm.com> | 2019-01-15 12:19:59 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-06-06 17:32:14 -0400 |
| commit | 169a126c6e88a99578a309a9021f314b5d532c5f (patch) | |
| tree | 7c274568243ae56d1f9b8014bbb46814f2394106 /include/uapi | |
| parent | 2a5a314874450decec244923209ce6ba97e3ed93 (diff) | |
| download | linux-next-169a126c6e88a99578a309a9021f314b5d532c5f.tar.gz | |
iommu/virtio: Add event queue
The event queue offers a way for the device to report access faults from
endpoints. It is implemented on virtqueue #1. Whenever the host needs to
signal a fault, it fills one of the buffers offered by the guest and
interrupts it.
Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/virtio_iommu.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h index ae6145cf5928..ba1b460c9944 100644 --- a/include/uapi/linux/virtio_iommu.h +++ b/include/uapi/linux/virtio_iommu.h @@ -139,4 +139,23 @@ struct virtio_iommu_req_probe { */ }; +/* Fault types */ +#define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0 +#define VIRTIO_IOMMU_FAULT_R_DOMAIN 1 +#define VIRTIO_IOMMU_FAULT_R_MAPPING 2 + +#define VIRTIO_IOMMU_FAULT_F_READ (1 << 0) +#define VIRTIO_IOMMU_FAULT_F_WRITE (1 << 1) +#define VIRTIO_IOMMU_FAULT_F_EXEC (1 << 2) +#define VIRTIO_IOMMU_FAULT_F_ADDRESS (1 << 8) + +struct virtio_iommu_fault { + __u8 reason; + __u8 reserved[3]; + __le32 flags; + __le32 endpoint; + __u8 reserved2[4]; + __le64 address; +}; + #endif |