lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230427104428.862643-1-mie@igel.co.jp>
Date:   Thu, 27 Apr 2023 19:44:25 +0900
From:   Shunsuke Mie <mie@...l.co.jp>
To:     Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc:     Krzysztof Wilczyński <kw@...ux.com>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Shunsuke Mie <mie@...l.co.jp>, Frank Li <Frank.Li@....com>,
        Jon Mason <jdmason@...zu.us>,
        Randy Dunlap <rdunlap@...radead.org>,
        Ren Zhijie <renzhijie2@...wei.com>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: [RFC PATCH v2 0/3] Introduce a PCIe endpoint virtio console

PCIe endpoint framework provides APIs to implement PCIe endpoint function.
This framework allows defining various PCIe endpoint function behaviors in
software. This patch extend the framework for virtio pci device. The
virtio is defined to communicate guest on virtual machine and host side.
Advantage of the virtio is the efficiency of data transfer and the conciseness
of implementation device using software. It also be applied to PCIe
endpoint function.

We designed and implemented a PCIe EP virtio console function driver using
the extended PCIe endpoint framework for virtio. It can be communicate
host and endpoint over virtio as console.

An architecture of the function driver is following:

 ┌────────────┐         ┌──────────────────────┬────────────┐
 │virtio      │         │                      │virtio      │
 │console drv │         ├───────────────┐      │console drv │
 ├────────────┤         │(virtio console│      ├────────────┤
 │ virtio bus │         │ device)       │◄────►│ virtio bus │
 ├────────────┤         ├---------------┤      └────────────┤
 │            │         │ pci ep virtio │                   │
 │  pci bus   │         │  console drv  │                   │
 │            │  pcie   ├───────────────┤                   │
 │            │ ◄─────► │  pci ep Bus   │                   │
 └────────────┘         └───────────────┴───────────────────┘
   PCIe Root              PCIe Endpoint

Introduced driver is `pci ep virtio console drv` in the figure. It works
as ep function for PCIe root and virtual virtio console device for PCIe
endpoint. Each side of virtio console driver has virtqueue, and
introduced driver transfers data on the virtqueue to each other. A data
on root tx queue is transfered to endpoint rx queue and vice versa.

This patchset is depend follwing patches which are under discussion.

- [RFC PATCH 0/3] Deal with alignment restriction on EP side
link: https://lore.kernel.org/linux-pci/20230113090350.1103494-1-mie@igel.co.jp/
- [PATCH v3] vringh: IOMEM support
link: https://lore.kernel.org/virtualization/CACGkMEumt4p7jU+H+T-b9My0buhdS8a-1GCSnWjnCwMAM=wo1Q@mail.gmail.com/T/#t

First of this patchset is introduce a helper function to realize pci
virtio function using PCIe endpoint framework. The second one is adding
a missing definition for virtio pci header. The last one is for PCIe
endpoint virtio console driver.

This is tested on next-20230416 and RCar S4 board as PCIe endpoint.

Shunsuke Mie (3):
  PCI: endpoint: introduce a helper to implement pci ep virtio function
  virtio_pci: add a definition of queue flag in ISR
  PCI: endpoint: Add EP function driver to provide virtio-console
    functionality

 drivers/pci/endpoint/functions/Kconfig        |  19 +
 drivers/pci/endpoint/functions/Makefile       |   2 +
 drivers/pci/endpoint/functions/pci-epf-vcon.c | 596 ++++++++++++++++++
 .../pci/endpoint/functions/pci-epf-virtio.c   | 458 ++++++++++++++
 .../pci/endpoint/functions/pci-epf-virtio.h   | 126 ++++
 include/uapi/linux/virtio_pci.h               |   3 +
 6 files changed, 1204 insertions(+)
 create mode 100644 drivers/pci/endpoint/functions/pci-epf-vcon.c
 create mode 100644 drivers/pci/endpoint/functions/pci-epf-virtio.c
 create mode 100644 drivers/pci/endpoint/functions/pci-epf-virtio.h

-- 
2.25.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ