Re: [PATCH V2] hw/arm: enable qxl for aarch64

[Daniel P . Berrangé]

On Mon, May 15, 2023 at 10:59:16AM +0100, Peter Maydell wrote:
> On Mon, 15 May 2023 at 10:57, Hao Zeng <zenghao@kylinos.cn> wrote:
> >
> >
> > On Mon, 2023-05-15 at 09:52 +0100, Daniel P. Berrangé wrote:
> > > Overall, IMHO, we should keep QXL restricted to as few build
> > > scenarios
> > > as possible. Given the status of SPICE, possibly we'll even want to
> > > deprecate it on x86 eventually, not add it to more arches.
> > >
> > > What are you seeing as the compelling use case that requires QXL to
> > > exist on aarch64 ?
> 
> >    Thank you for your answer, it made me learn a lot. No use case, just
> > outside customer feedback on the ARM architecture qxl use has problems,
> > I compiled the community qemu, found that the default does not support
> > qxl display, so the submitted enablement.
> >   I agree with you, please ignore this commit.
> 
> I would still like to know why QXL isn't automatically
> enabled like every other PCI device...

Historical reasons ?  Originally both QXL and SPICE were x86 only and
SPICE was broken on big endian if you tried to build it. The orignal
QXL code in QEMU had a hard dependancy on SPICE until an enhancement
made it work with other backends.


With regards,
Daniel
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