linux-kernel - Re: [PATCH] xen: privcmd: Add support for irqfd

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Message-ID: <20230720094127.zsqpvryj36cbekik@vireshk-i7>
Date:   Thu, 20 Jul 2023 15:11:27 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Oleksandr Tyshchenko <Oleksandr_Tyshchenko@...m.com>
Cc:     Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        "stratos-dev@...lists.linaro.org" <stratos-dev@...lists.linaro.org>,
        Erik Schilling <erik.schilling@...aro.org>,
        Manos Pitsidianakis <manos.pitsidianakis@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] xen: privcmd: Add support for irqfd

On 13-07-23, 14:40, Oleksandr Tyshchenko wrote:
> Viresh, great work!

Thanks Oleksandr.

> Do you perhaps have corresponding users-space (virtio backend) example 
> adopted for that feature (I would like to take a look at it if possible)?

This is taken care by the xen-vhost-frontend Rust crate in our case
(which was initially designed based on virtio-disk but has deviated a
lot from it now). Here is the commit of interest. The backends remain
unmodified though.

https://github.com/vireshk/xen-vhost-frontend/commit/d79c419f14c1f54240b3147c342894998c274364

And I have updated the commit with CONFIG_ARM64 thingy..

-- 
viresh