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Re: [PATCH] docs: add references to Argo Linux driver sources and information

  • To: Christopher Clark <christopher.w.clark@xxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Fri, 8 Oct 2021 09:56:22 +0200
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Ian Jackson <iwj@xxxxxxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Rich Persaud <persaur@xxxxxxxxx>, Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Jason Andryuk <jandryuk@xxxxxxxxx>, Eric Chanudet <chanudeter@xxxxxxxxx>, openxt@xxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 08 Oct 2021 07:56:38 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 08.10.2021 06:12, Christopher Clark wrote:
> Add a section to the Argo design document to supply guidance on how to
> enable Argo in Xen and where to obtain source code and documentation
> for Argo device drivers for guest OSes, primarily from OpenXT.
> Signed-off-by: Christopher Clark <christopher.w.clark@xxxxxxxxx>

Just a nit:

> --- a/docs/designs/argo.pandoc
> +++ b/docs/designs/argo.pandoc
> @@ -439,6 +439,51 @@ that teardown of any domain will not interfere with any 
> Argo hypercall
>  operation. It enables introducing granular locking without complex or
>  error-prone lock acquisition logic.
> +# Related Material
> +
> +## Enabling Argo in Xen
> +
> +To enable Argo in a build of the Xen hypervisor, please ensure that
> +CONFIG_ARGO is enabled in the Xen hypervisor build configuration file.
> +
> +To make Argo available for use at runtime on a Xen system, please see the
> +Argo settings in the Xen command line document.
> +
> +## Linux Argo drivers
> +
> +A Linux kernel device driver for Argo and corresponding Linux userspace
> +software, libargo, that utilizes it for interdomain communication between
> +application level software is available and maintained by the OpenXT Project,
> +at:
> +
> +https://github.com/OpenXT/linux-xen-argo
> +
> +The repository contains the primary Linux kernel Argo driver, which is 
> derived
> +from the original XenClient v4v driver. The document at the following link
> +describes planning and design notes from OpenXT community discussion for
> +improvements to the driver:
> +
> +https://openxt.atlassian.net/wiki/spaces/DC/pages/775389197/New+Linux+Driver+for+Argo
> +
> +An alternative Linux Argo driver is in also available in the same repository,

One "in" too many? Probably fine to adjust whole committing, if no other
comments arise.


> +implemented to explore a different approach for Linux to use the Argo
> +primitives under the Vsock address family to allow socket communication 
> between
> +Xen domains.
> +
> +## v4v drivers
> +
> +A Windows driver for v4v has previously been used in XenClient and OpenXT
> +which could be ported to Argo. It may require update for compatibility with
> +recent versions of Windows software.
> +
> +https://github.com/OpenXT/xc-windows/tree/master/xenv4v
> +
> +The Linux, Windows and OSX guest tools for the Open Source HP uxen hypervisor
> +contain drivers for v4v which are relevant as code bases of interest for
> +porting or developing new guest OS drivers for Argo.
> +
> +https://github.com/uxen-virt/uxen/tree/ascara/vm-support
> +
>  # Future Work
>  - Performance measurement and optimization



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