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Date:   Thu, 22 Jul 2021 14:55:19 +0200
From:   Christoph Hellwig <hch@....de>
To:     Zhenyu Wang <zhenyuw@...ux.intel.com>
Cc:     Christoph Hellwig <hch@....de>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Zhi Wang <zhi.a.wang@...el.com>,
        intel-gfx@...ts.freedesktop.org,
        intel-gvt-dev@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: refactor the i915 GVT support

On Thu, Jul 22, 2021 at 05:45:16PM +0800, Zhenyu Wang wrote:
> The reason we isolated hypervisor specific code from core vgpu
> emulation is to make multiple hypervisor support possible. Yes, we do
> have Xen support but never got way into upstream...And we also have
> third party hypervisors which leverage gvt function through current
> hypervisor interface.

Out of tree stuff simply does not matter for the upstream kernel,
especially when it creates such a huge burden.

As a background:  I started this refactoring as a lot of the code did
not make much sense when reviewing the mdev integration in preparation
to switching them to the new mdev interface from Jason.

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