BPF

eBPF (which is no longer an acronym for anything), also commonly referred
to as BPF, is a technology with origins in the Linux kernel that can safely
run programs in a privileged context such as the operating system kernel.

eBPF is increasingly being used beyond just the Linux kernel, with
implementations in network interface cards, Microsoft Windows, etc.

There is currently no formal standard for eBPF and no clear scope
for what is part of eBPF and what is not.

The bpf working group is initially tasked with documenting the existing
state of the eBPF ecosystem, and a clear process for extensions,
including initial extensions that are widely useful and showcase the
process.  The working group shall not adopt new work until these
documents have progressed to working group last call.

The working group will produce one or more documents on the following
work item topics:

* The eBPF instruction set architecture (ISA) that defines the
  instructions and low-level virtual machine for eBPF programs,

* Verifier expectations and building blocks for allowing safe execution
  of untrusted eBPF programs,

* the BPF Type Format (BTF) that defines debug information and
  introspection capabilities for eBPF programs,

* the eBPF bindings for the ELF executable file format,

* the platform support ABI, including calling convention, linker
  requirements, and relocations,

* Cross-platform map types allowing native data structure access from
  eBPF programs,

* Cross-platform helper functions, such as for manipulation of maps,

* Cross-platform eBPF program types that define the higher level
  execution environment for eBPF programs,

* and an architecture and framework informational document.

The bpf working group shall actively engage the eBPF Foundation
steering committee and the broader implementation community to
ensure inclusion in the IETF's consensus-driven process.

The working group is intended to only work on cross-platform aspects of
eBPF that are useful to the wider internet community and not operating
or otherwise platform specific.