Re: [PATCH] xen: fix build without pci passthrough

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

On Mon, May 04, 2020 at 12:35:39PM +0200, Philippe Mathieu-Daudé wrote:
> Hi Roger,
> 
> On 5/4/20 12:14 PM, Roger Pau Monne wrote:
> > has_igd_gfx_passthru is only available when QEMU is built with
> > CONFIG_XEN_PCI_PASSTHROUGH, and hence shouldn't be used in common
> > code without checking if it's available.
> > 
> > Fixes: 46472d82322d0 ('xen: convert "-machine igd-passthru" to an 
> > accelerator property')
> > Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> 
> See Kconfig fix suggested here:
> https://www.mail-archive.com/xen-devel@xxxxxxxxxxxxxxxxxxxx/msg61844.html

Having it available on Kconfig is indeed fine, but this still needs
some kind of configure checks AFAIK, as it's only available on Linux.

I'm certainly missing some context, but whether XEN_IGD_PASSTHROUGH
gets defined on Kconfig or not shouldn't really matter for this patch,
as we would still need to gate the code properly so it's not build
when PCI passthrough (or whatever name the option has) is not enabled?

Thanks, Roger.