Re: [PATCH v3 4/5] xen/arm: enable vPCI for dom0

[Julien Grall <julien@xxxxxxx>]

Hi Stewart,

On 09/10/2023 20:57, Stewart Hildebrand wrote:
> Set the pci flags in xen_arch_domainconfig to enable vPCI for dom0.
>
> Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
> ---
> Julien had a suggestion to make this conditional on pci_passthrough_enabled [1].
> However, in v5 of the PCI ARM SMMU series [2], we propose removing the
> pci_passthrough_enabled flag. If pci_passthrough_enabled is gone, the conditions
> under which vPCI should be enabled for dom0 aren't entirely clear to me (other
> than CONFIG_HAS_VPCI=y).
I think it should be based on whether Xen detected a PCI hostbridge in 
system. I haven't looked which variable/function could be used in Xen 
for this purpose.
Cheers,

--
Julien Grall