From: "Jan Beulich" <JBeulich@suse.com>
To: Igor Druzhinin <igor.druzhinin@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Wei Liu <wei.liu2@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] libacpi: report PCI slots as enabled only for hotpluggable devices
Date: Thu, 23 May 2019 02:57:49 -0600 [thread overview]
Message-ID: <5CE6608D02000078002319C3@prv1-mh.provo.novell.com> (raw)
In-Reply-To: <1558548634-25154-1-git-send-email-igor.druzhinin@citrix.com>
>>> 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>
_______________________________________________
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https://lists.xenproject.org/mailman/listinfo/xen-devel
WARNING: multiple messages have this Message-ID (diff)
From: "Jan Beulich" <JBeulich@suse.com>
To: "Igor Druzhinin" <igor.druzhinin@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Wei Liu <wei.liu2@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [Xen-devel] [PATCH] libacpi: report PCI slots as enabled only for hotpluggable devices
Date: Thu, 23 May 2019 02:57:49 -0600 [thread overview]
Message-ID: <5CE6608D02000078002319C3@prv1-mh.provo.novell.com> (raw)
Message-ID: <20190523085749.1qJyT2sczZeOkYJL5_nGtWv92cwAFIUMZErdNsLXbPM@z> (raw)
In-Reply-To: <1558548634-25154-1-git-send-email-igor.druzhinin@citrix.com>
>>> 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>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2019-05-23 8:57 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 [this message]
2019-05-23 8:57 ` Jan Beulich
2019-05-23 15:20 ` Wei Liu
2019-05-23 15:20 ` [Xen-devel] " 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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