From: Christoph Hellwig <hch@lst.de>
To: "Wang, Zhi A" <zhi.a.wang@intel.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>,
Luis Chamberlain <mcgrof@kernel.org>,
Jessica Yu <jeyu@kernel.org>,
"De Marchi, Lucas" <lucas.demarchi@intel.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>,
Christoph Hellwig <hch@lst.de>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
Greg KH <gregkh@linuxfoundation.org>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Gerd Hoffmann <kraxel@redhat.com>,
"Vivi, Rodrigo" <rodrigo.vivi@intel.com>,
"intel-gvt-dev@lists.freedesktop.org"
<intel-gvt-dev@lists.freedesktop.org>,
"Nikula, Jani" <jani.nikula@intel.com>
Subject: Re: [Intel-gfx] refactor the i915 GVT support
Date: Thu, 30 Sep 2021 07:24:02 +0200 [thread overview]
Message-ID: <20210930052402.GA21841@lst.de> (raw)
In-Reply-To: <24c7bbec-b425-52fb-d3f9-539a0a391dfa@intel.com>
On Wed, Sep 29, 2021 at 06:27:16PM +0000, Wang, Zhi A wrote:
> Thanks for the idea. I am not sure i915 guys would take this idea since
> that it's only for GVT-g, i915 doesn't use this at all. We need to take
> a snapshot of both PCI configuration space and MMIO registers before
> i915 driver starts to touch the HW.
>
> One idea is we capture the registers in intel_gvt.c during the early
> initialization and do everything else when i915.ko is fully loaded. But
> how about dependence between i915.ko and kvmgt.ko? We cannot do
> request_module("kvmgt") in i915.ko.
>
> Maybe Christoph can give more input on this and how we can deal with
> this? Before we figure out an solution, we have to pick that patch out
> since it blocks our pull request schedule.
>
> Also I was thinking if moving gvt into kvmgt.ko is the right direction.
> It seems the module loading system in kernel is not designed for "module
> A loading module B, which needs symbols from module A, in the
> initialization path of module A".
I have a few idea on how to sort this "deadlock" out. But I'm completely
swamped until the end of next week, so I won't get to anything before
that.
next prev parent reply other threads:[~2021-09-30 5:24 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 15:53 [Intel-gfx] refactor the i915 GVT support Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 01/21] drm/i915/gvt: integrate into the main Makefile Christoph Hellwig
2021-08-03 9:27 ` Zhenyu Wang
2021-07-21 15:53 ` [Intel-gfx] [PATCH 02/21] drm/i915/gvt: remove module refcounting in intel_gvt_{, un}register_hypervisor Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 03/21] drm/i915/gvt: remove enum hypervisor_type Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 04/21] drm/i915/gvt: move the gvt code into kvmgt.ko Christoph Hellwig
2021-08-09 11:29 ` Joonas Lahtinen
2021-08-09 14:29 ` Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 05/21] drm/i915/gvt: remove intel_gvt_ops Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 06/21] drm/i915/gvt: remove the map_gfn_to_mfn and set_trap_area ops Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 07/21] drm/i915/gvt: remove the unused from_virt_to_mfn op Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 08/21] drm/i915/gvt: merge struct kvmgt_vdev into struct intel_vgpu Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 09/21] drm/i915/gvt: merge struct kvmgt_guest_info into strut intel_vgpu Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 10/21] drm/i915/gvt: remove vgpu->handle Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 11/21] drm/i915/gvt: devirtualize ->{read, write}_gpa Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 12/21] drm/i915/gvt: devirtualize ->{get, put}_vfio_device Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 13/21] drm/i915/gvt: devirtualize ->set_edid and ->set_opregion Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 14/21] drm/i915/gvt: devirtualize ->detach_vgpu Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 15/21] drm/i915/gvt: devirtualize ->inject_msi Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 16/21] drm/i915/gvt: devirtualize ->is_valid_gfn Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 17/21] drm/i915/gvt: devirtualize ->gfn_to_mfn Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 18/21] drm/i915/gvt: devirtualize ->{enable, disable}_page_track Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 19/21] drm/i915/gvt: devirtualize ->dma_{, un}map_guest_page Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 20/21] drm/i915/gvt: devirtualize dma_pin_guest_page Christoph Hellwig
2021-07-21 15:53 ` [Intel-gfx] [PATCH 21/21] drm/i915/gvt: remove struct intel_gvt_mpt Christoph Hellwig
2021-07-21 17:42 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [01/21] drm/i915/gvt: integrate into the main Makefile Patchwork
2021-07-21 17:43 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-07-21 18:12 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-07-21 21:14 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2021-07-22 9:45 ` [Intel-gfx] refactor the i915 GVT support Zhenyu Wang
2021-07-22 12:55 ` Christoph Hellwig
2021-07-22 10:49 ` Wang, Zhi A
2021-07-22 11:26 ` Gerd Hoffmann
2021-07-27 12:12 ` Jason Gunthorpe
2021-07-28 13:38 ` Wang, Zhi A
2021-07-28 13:43 ` Greg KH
2021-07-28 17:59 ` Jason Gunthorpe
2021-07-29 7:20 ` Christoph Hellwig
2021-07-29 7:30 ` Daniel Vetter
2021-08-03 9:43 ` Zhenyu Wang
2021-08-03 14:30 ` Jason Gunthorpe
2021-08-04 5:26 ` Zhenyu Wang
2021-08-16 17:34 ` Christoph Hellwig
2021-08-17 1:08 ` Zhenyu Wang
2021-08-17 5:22 ` Zhenyu Wang
2021-08-19 8:29 ` Zhenyu Wang
2021-08-19 14:43 ` Joonas Lahtinen
2021-08-26 6:04 ` Zhenyu Wang
2021-08-20 14:17 ` Christoph Hellwig
2021-08-20 19:56 ` Luis Chamberlain
2021-08-26 6:12 ` Zhenyu Wang
2021-09-28 7:41 ` Wang, Zhi A
2021-09-28 14:00 ` Luis Chamberlain
2021-09-28 14:35 ` Wang, Zhi A
2021-09-28 15:05 ` Jason Gunthorpe
2021-09-29 18:27 ` Wang, Zhi A
2021-09-29 18:55 ` Jason Gunthorpe
2021-10-01 13:01 ` Wang, Zhi A
2021-10-05 7:33 ` Wang, Zhi A
2021-09-30 5:24 ` Christoph Hellwig [this message]
2021-08-26 6:08 ` Zhenyu Wang
2021-08-04 5:40 ` Christoph Hellwig
2021-09-28 14:24 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for refactor the i915 GVT support (rev2) Patchwork
2021-09-28 14:54 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-09-28 16:12 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2021-07-29 8:19 ` [Intel-gfx] refactor the i915 GVT support Wang, Zhi A
2021-08-19 9:41 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for " Patchwork
2021-07-22 13:16 ` [Intel-gfx] " Greg KH
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