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[Qemu-devel] [virtio-dev][RFC v2 0/2] Signal Distribution Module virtio
[Qemu-devel] [virtio-dev][RFC v2 0/2] Signal Distribution Module virtio device specification
Tue, 28 Jun 2016 13:03:42 +0200
This patch series proposes the specification of a new virtio device on which we
are working on, namely the Signal Distribution Module (SDM).
The SDM routes inter-processor signals using a user-defined communication
channel. A possible use-case of the SDM is an AMP system where the vairous
need to exhange signals (e.g., interrupts) to implement inter-processor
communication patterns. An example are RPMSG and remoteproc, both using
interrupts to kick the virtio queues used for communication (RPMSG), and a boot
signal to start the execution of a slave processor (remoteproc).
However the SDM is not limited to those use-cases and can be easily extended to
support user-defined signals and communication channels.
In addition to the virtio version, a platform device version is available as
well to be used for cases where a processor is not running Linux but another
OS/firmware that does not support virtio.
This patch series is related to :
[Qemu-devel][RFC v3 0/6] SDM Interface
where you can find the latest RFC patch set for the QEMU code of the virtio SDM
Kernel code is publicly accessible from:
QEMU code is accessible from:
At the current state the SDM is implemented as a QEMU device and
provides a local channel, for intra-QEMU signals, and a channel based on
sockets (UNIX or TCP) to exchange signals between processors in different
instances of QEMU.
Each communication channel exports a common interface for the sake of ease of
extension and integration of new channels.
Changes since v1:
- Fixed some typos
- Removed dependencies from QEMU
- Added explanation on how SDM can be used in AMP systems
- Explained semantics of payload field in SDMSignalData struct
Christian Pinto (2):
content: reserve virtio device ID
virtio-sdm: new device specification
content.tex | 4 ++
virtio-sdm.tex | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 132 insertions(+)
create mode 100644 virtio-sdm.tex
- [Qemu-devel] [virtio-dev][RFC v2 0/2] Signal Distribution Module virtio device specification,
Christian Pinto <=