Re: [PATCH v2 2/3] xen/pci: modify pci_add_device to handle device add by Xen

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 20 Aug 2025, Mykyta Poturai wrote:
> From: Luca Fancellu <luca.fancellu@xxxxxxx>
> 
> Currently pci_add_device is called from hypercalls requested by Dom0
> to add pci devices and when the device has no domain associated with
> it, it is assumed that hardware_domain is the owner.
> 
> On the dom0less scenario, the enumeration is performed by the
> firmware and Xen at boot time might want to assign some pci devices
> to guests, so it has to firstly add the device and then assign it to
> the final guest.
> 
> Modify pci_add_device to have the owner domain passed as a parameter
> to the function, so that when it is called from the hypercall the
> owner would be the caller domain, otherwise when Xen is calling it,
> it would be another domain since hw domain could not be there
> (dom0less guests without Dom0 use case).
> 
> Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
> Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>