| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
[Xen-devel] RE: [PATCH 2/4 v2] PCI: support ARI capability
|
To: |
"Roland Dreier" <rdreier@xxxxxxxxx>, "Alex Chiang" <achiang@xxxxxx> |
|
Subject: |
[Xen-devel] RE: [PATCH 2/4 v2] PCI: support ARI capability |
|
From: |
"Zhao, Yu" <yu.zhao@xxxxxxxxx> |
|
Date: |
Wed, 10 Sep 2008 15:48:04 +0800 |
|
Cc: |
Randy Dunlap <randy.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Grant Grundler <grundler@xxxxxxxxxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, Matthew Wilcox <matthew@xxxxxx>, linux-pci@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, Greg KH <greg@xxxxxxxxx> |
|
Delivery-date: |
Wed, 10 Sep 2008 00:48:39 -0700 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<ada3akjj268.fsf@xxxxxxxxx> |
|
List-help: |
<mailto:xen-devel-request@lists.xensource.com?subject=help> |
|
List-id: |
Xen developer discussion <xen-devel.lists.xensource.com> |
|
List-post: |
<mailto:xen-devel@lists.xensource.com> |
|
List-subscribe: |
<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
|
List-unsubscribe: |
<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
|
References: |
<7A25B56E4BE99C4283EB931CD1A40E110177EB6E@xxxxxxxxxxxxxxxxxxxxxxxxxxxx><20080901152734.GC16796@xxxxxxxxxxxxx> <ada3akjj268.fsf@xxxxxxxxx> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
Thread-index: |
AckMSnZjgfdQe9cqRUOUN5Z9zGpSOwGzY76A |
|
Thread-topic: |
[PATCH 2/4 v2] PCI: support ARI capability |
On Monday, September 01, 2008 11:50 PM, Roland Dreier wrote:
>To: Alex Chiang
>Cc: Zhao, Yu; Jesse Barnes; linux-pci@xxxxxxxxxxxxxxx; Randy Dunlap; Greg KH;
>Grant Grundler; Matthew Wilcox; linux-kernel@xxxxxxxxxxxxxxx;
>kvm@xxxxxxxxxxxxxxx; virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx;
>xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [PATCH 2/4 v2] PCI: support ARI capability
>
> > > +config PCI_ARI
> > > + bool "PCI ARI support"
> > > + depends on PCI
> > > + default n
> > > + help
> > > + This enables PCI Alternative Routing-ID Interpretation.
> >
> > This Kconfig help text is a little weak. Why not include the text
> > you've already written here:
> >
> > Support Alternative Routing-ID Interpretation (ARI), which
> > increases the number of functions that can be supported by a PCIe
> > endpoint. ARI is required by SR-IOV.
>
>I agree with this improvement to the help text. But a further question
>is whether ARI even merits its own user-visible config option. Is it
>worth having yet another choice for users? When would someone want ARI
>but not SR-IOV?
ARI is an independent PCI Express extended capability. Multi-function devices
supporting this capability may use it to track dependency between different
functions and assign function group numbers to these functions.
Another reason to keep this separated with SR-IOV is that after ARI is enabled,
PCI Express Endpoint may have non-zero slot number (device number), which is
different from traditional PCI Express Endpoint.
Thanks.
>
> - R.
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home