Re: refactor the i915 GVT support and move to the modern mdev API v3

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On 4/11/22 2:13 PM, Christoph Hellwig wrote:
> Hi all,
> 
> the GVT code in the i915 is a bit of a mess right now due to strange
> abstractions and lots of indirect calls.  This series refactors various
> bits to clean that up.  The main user visible change is that almost all
> of the GVT code moves out of the main i915 driver and into the kvmgt
> module.

Hi Christoph:

Do you want me to merge the GVT-g patches in this series? Or you want them to get merged from your side?

Thanks,
Zhi.

> 
> Tested on my Thinkpad with a Kaby Lake CPU and integrated graphics.
> 
> Git tree:
> 
>     git://git.infradead.org/users/hch/misc.git i915-gvt
> 
> Gitweb:
> 
>     http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/i915-gvt
> 
> Changes since v2:
>  - rebased on top of Linx 5.18-rc +
>    "Refactor GVT-g MMIO tracking table and handlers"
>  - don't fold the gvt Makefile into the main Makefile
>  - add the mdev patches to remove the legacy interface that is now
>    unused to the end of the series
> 
> Changes since v1:
>  - rebased on Linux 5.15
>  - allow the kvmgvt module to be loaded at any time and thus solve
>    the deadlock when both i915 amd kvmgvt are modular
>  - include the conversion to the modern mdev API
> 
> Note that I do expect to rebased this again against 5.16-rc1 once
> released, but I'd like to get this out for review ASAP.
> 
> Diffstat:
>  b/drivers/gpu/drm/i915/Kconfig          |   33 
>  b/drivers/gpu/drm/i915/Makefile         |   31 
>  b/drivers/gpu/drm/i915/gvt/cfg_space.c  |   89 --
>  b/drivers/gpu/drm/i915/gvt/cmd_parser.c |    4 
>  b/drivers/gpu/drm/i915/gvt/dmabuf.c     |   36 -
>  b/drivers/gpu/drm/i915/gvt/execlist.c   |   12 
>  b/drivers/gpu/drm/i915/gvt/gtt.c        |   55 +
>  b/drivers/gpu/drm/i915/gvt/gvt.h        |  125 ++-
>  b/drivers/gpu/drm/i915/gvt/interrupt.c  |   38 +
>  b/drivers/gpu/drm/i915/gvt/kvmgt.c      | 1099 +++++++++++++++-----------------
>  b/drivers/gpu/drm/i915/gvt/mmio.c       |    4 
>  b/drivers/gpu/drm/i915/gvt/opregion.c   |  148 ----
>  b/drivers/gpu/drm/i915/gvt/page_track.c |    8 
>  b/drivers/gpu/drm/i915/gvt/scheduler.c  |   37 -
>  b/drivers/gpu/drm/i915/gvt/trace.h      |    2 
>  b/drivers/gpu/drm/i915/gvt/vgpu.c       |   22 
>  b/drivers/gpu/drm/i915/i915_drv.c       |    7 
>  b/drivers/gpu/drm/i915/i915_drv.h       |    1 
>  b/drivers/gpu/drm/i915/i915_trace.h     |    1 
>  b/drivers/gpu/drm/i915/intel_gvt.c      |  162 +++-
>  b/drivers/gpu/drm/i915/intel_gvt.h      |   17 
>  drivers/gpu/drm/i915/gvt/Makefile       |    9 
>  drivers/gpu/drm/i915/gvt/gvt.c          |  340 ---------
>  drivers/gpu/drm/i915/gvt/hypercall.h    |   82 --
>  drivers/gpu/drm/i915/gvt/mpt.h          |  400 -----------
>  25 files changed, 929 insertions(+), 1833 deletions(-)
> 





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