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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.05.19 at 17:20, <wei.liu2@xxxxxxxxxx> wrote:
> On Thu, May 23, 2019 at 02:57:49AM -0600, Jan Beulich wrote:
>> >>> 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>
>> 
> 
> Jan, FAOD since you're the maintainer I'm expecting you to push this
> patch yourself.

Sure, I have it on my list of things to push.

Jan



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