.. SPDX-License-Identifier: BSD-3-Clause Copyright 2019 Mellanox Technologies, Ltd Overview of vDPA Drivers Features ================================= This section explains the supported features that are listed in the table below. csum Device can handle packets with partial checksum. guest csum Guest can handle packets with partial checksum. mac Device has given MAC address. gso Device can handle packets with any GSO type. guest tso4 Guest can receive TSOv4. guest tso6 Guest can receive TSOv6. ecn Device can receive TSO with ECN. ufo Device can receive UFO. host tso4 Device can receive TSOv4. host tso6 Device can receive TSOv6. mrg rxbuf Guest can merge receive buffers. ctrl vq Control channel is available. ctrl rx Control channel RX mode support. any layout Device can handle any descriptor layout. guest announce Guest can send gratuitous packets. mq Device supports Receive Flow Steering. version 1 v1.0 compliant. log all Device can log all write descriptors (live migration). indirect desc Indirect buffer descriptors support. event idx Support for avail_idx and used_idx fields. mtu Host can advise the guest with its maximum supported MTU. in_order Device can use descriptors in ring order. IOMMU platform Device support IOMMU addresses. packed Device support packed virtio queues. proto mq Support the number of queues query. proto log shmfd Guest support setting log base. proto rarp Host can broadcast a fake RARP after live migration. proto reply ack Host support requested operation status ack. proto host notifier Host can register memory region based host notifiers. proto pagefault Slave expose page-fault FD for migration process. queue statistics Support virtio queue statistics query. FreeBSD Support FreeBSD. Linux Support Linux. ARMv7 Support armv7 architecture. ARMv8 Support armv8a (64bit) architecture. Power8 Support PowerPC architecture. x86-32 Support 32bits x86 architecture. x86-64 Support 64bits x86 architecture. Usage doc Documentation describes usage, In ``doc/guides/vdpadevs/``. Design doc Documentation describes design. In ``doc/guides/vdpadevs/``. Perf doc Documentation describes performance values, In ``doc/perf/``. .. note:: Most of the features capabilities should be provided by the drivers via the next vDPA operations: ``get_features`` and ``get_protocol_features``. References ========== * `OASIS: Virtual I/O Device (VIRTIO) Version 1.1 `_ * `QEMU: Vhost-user Protocol `_ Features Table ============== .. _table_vdpa_pmd_features: .. include:: overview_feature_table.txt .. Note:: Features marked with "P" are partially supported. Refer to the appropriate driver guide in the following sections for details.