Re: [Xen-devel] [PATCH] libacpi: report PCI slots as enabled only for hotpluggable devices

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.05.19 at 20:10, <igor.druzhinin@xxxxxxxxxx> wrote:
> DSDT for qemu-xen lacks _STA method of PCI slot object. If _STA method
> doesn't exist then the slot is assumed to be always present and active
> which in conjunction with _EJ0 method makes every device ejectable for
> an OS even if it's not the case.
> 
> qemu-kvm is able to dynamically add _EJ0 method only to those slots
> that either have hotpluggable devices or free for PCI passthrough.
> As Xen lacks this capability we cannot use their way.
> 
> qemu-xen-traditional DSDT has _STA method which only reports that
> the slot is present if there is a PCI devices hotplugged there.
> This is done through querying of its PCI hotplug controller.
> qemu-xen has similar capability that reports if device is "hotpluggable
> or absent" which we can use to achieve the same result.
> 
> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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