Re: [PATCH v8] vpci: Add resizable bar support

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Feb 14, 2025 at 08:22:39AM +0000, Chen, Jiqian wrote:
> On 2025/2/14 16:18, Oleksii Kurochko wrote:
> > 
> > On 2/14/25 8:35 AM, Jan Beulich wrote:
> >> On 14.02.2025 04:32, Chen, Jiqian wrote:
> >>> On 2025/2/11 17:21, Roger Pau Monné wrote:
> >>>> On Tue, Feb 11, 2025 at 10:22:57AM +0800, Jiqian Chen wrote:
> >>>>> Some devices, like AMDGPU, support resizable bar capability,
> >>>>> but vpci of Xen doesn't support this feature, so they fail
> >>>>> to resize bars and then cause probing failure.
> >>>>>
> >>>>> According to PCIe spec, each bar that supports resizing has
> >>>>> two registers, PCI_REBAR_CAP and PCI_REBAR_CTRL. So, add
> >>>>> handlers to support resizing the size of BARs.
> >>>>>
> >>>>> Note that Xen will only trap PCI_REBAR_CTRL, as PCI_REBAR_CAP
> >>>>> is read-only register and the hardware domain already gets
> >>>>> access to it without needing any setup.
> >>>>>
> >>>>> Signed-off-by: Jiqian Chen <Jiqian.Chen@xxxxxxx>
> >>>> Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> >>> Thank you!
> >>> May I know whether this can be merged in Xen version 4.20?
> > 
> > It would be better to merge it after the Xen 4.20 release.
> > (It will happen in the next 2 weeks).
> Got it. Thank you for reply.

Could you also add an entry to the CHANGELOG.md file to note that
ReBAR is now supported on PVH dom0?

Thanks, Roger.