1# -*- Mode: Python -*- 2# vim: filetype=python 3# 4# This work is licensed under the terms of the GNU GPL, version 2 or later. 5# See the COPYING file in the top-level directory. 6 7## 8# = eBPF Objects 9# 10# eBPF object is an ELF binary that contains the eBPF 11# program and eBPF map description(BTF). Overall, eBPF 12# object should contain the program and enough metadata 13# to create/load eBPF with libbpf. As the eBPF maps/program 14# should correspond to QEMU, the eBPF can't be used from 15# different QEMU build. 16# 17# Currently, there is a possible eBPF for receive-side scaling (RSS). 18# 19## 20 21## 22# @EbpfObject: 23# 24# An eBPF ELF object. 25# 26# @object: the eBPF object encoded in base64 27# 28# Since: 9.0 29## 30{ 'struct': 'EbpfObject', 31 'data': {'object': 'str'}, 32 'if': 'CONFIG_EBPF' } 33 34## 35# @EbpfProgramID: 36# 37# The eBPF programs that can be gotten with request-ebpf. 38# 39# @rss: Receive side scaling, technology that allows steering traffic 40# between queues by calculation hash. Users may set up 41# indirection table and hash/packet types configurations. Used 42# with virtio-net. 43# 44# Since: 9.0 45## 46{ 'enum': 'EbpfProgramID', 47 'if': 'CONFIG_EBPF', 48 'data': [ { 'name': 'rss' } ] } 49 50## 51# @request-ebpf: 52# 53# Retrieve an eBPF object that can be loaded with libbpf. Management 54# applications (g.e. libvirt) may load it and pass file descriptors to 55# QEMU, so they can run running QEMU without BPF capabilities. 56# 57# @id: The ID of the program to return. 58# 59# Returns: eBPF object encoded in base64. 60# 61# Since: 9.0 62## 63{ 'command': 'request-ebpf', 64 'data': { 'id': 'EbpfProgramID' }, 65 'returns': 'EbpfObject', 66 'if': 'CONFIG_EBPF' } 67