From: Wei Liu <wei.liu2@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Igor Druzhinin <igor.druzhinin@citrix.com>,
xen-devel <xen-devel@lists.xenproject.org>,
Wei Liu <wei.liu2@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [Xen-devel] [PATCH] libacpi: report PCI slots as enabled only for hotpluggable devices
Date: Thu, 23 May 2019 16:20:07 +0100 [thread overview]
Message-ID: <20190523152007.GH2373@zion.uk.xensource.com> (raw)
Message-ID: <20190523152007.ASxngRJVoW9L5WQfYRQWqHOqcSRZQd_zOoperOZuIzQ@z> (raw)
In-Reply-To: <5CE6608D02000078002319C3@prv1-mh.provo.novell.com>
On Thu, May 23, 2019 at 02:57:49AM -0600, Jan Beulich wrote:
> >>> On 22.05.19 at 20:10, <igor.druzhinin@citrix.com> 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@citrix.com>
>
> Reviewed-by: Jan Beulich <jbeulich@suse.com>
>
Jan, FAOD since you're the maintainer I'm expecting you to push this
patch yourself.
Wei.
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next prev parent reply other threads:[~2019-05-23 15:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-22 18:10 [PATCH] libacpi: report PCI slots as enabled only for hotpluggable devices Igor Druzhinin
2019-05-22 18:10 ` [Xen-devel] " Igor Druzhinin
2019-05-23 8:57 ` Jan Beulich
2019-05-23 8:57 ` [Xen-devel] " Jan Beulich
2019-05-23 15:20 ` Wei Liu [this message]
2019-05-23 15:20 ` Wei Liu
2019-05-23 15:30 ` Jan Beulich
2019-05-23 15:30 ` [Xen-devel] " Jan Beulich
2019-08-05 14:50 ` Ian Jackson
2019-08-05 15:51 ` Jan Beulich
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