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RE: [PATCH for-4.17?] x86/pvh: report ACPI VFCT table to dom0 if present
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Henry Wang <Henry.Wang@xxxxxxx>
- Date: Wed, 9 Nov 2022 02:35:35 +0000
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- Cc: "ray.huang@xxxxxxx" <ray.huang@xxxxxxx>, "Alexander.Deucher@xxxxxxx" <Alexander.Deucher@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Wed, 09 Nov 2022 02:36:00 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH for-4.17?] x86/pvh: report ACPI VFCT table to dom0 if present
Hi Roger,
> -----Original Message-----
> Subject: [PATCH for-4.17?] x86/pvh: report ACPI VFCT table to dom0 if
> present
>
> The VFCT ACPI table is used by AMD GPUs to expose the vbios ROM image
> from the firmware instead of doing it on the PCI ROM on the physical
> device.
>
> As such, this needs to be available for PVH dom0 to access, or else
> the GPU won't work.
>
> Reported-by: Huang Rui <ray.huang@xxxxxxx>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> ---
> This is a bugfix, but given PVH dom0 is still experimental I'm not
> sure it would qualify for the release. OTOH being experimental means
> there are no guarantees it will work, so the change is unlikely to
> make this any worse.
Following the discussion in this thread, I think this is a simple enough
patch with big enough benefit given Ray has already tested the patch.
I wouldn't block this patch for 4.17 release, but we need to make sure
Jan (the ACPI maintainer) is happy with the VFCT table information in
commit message. Then feel free to add my:
Release-acked-by: Henry Wang <Henry.Wang@xxxxxxx>
Kind regards,
Henry
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