linux-kernel - Re: [PATCH] PCI: remove pcibios_scan_all

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Message-ID: <4A415CDC.2090700@goop.org>
Date:	Tue, 23 Jun 2009 15:53:16 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	Matthew Wilcox <matthew@....cx>, Alex Chiang <achiang@...com>,
	jbarnes@...tuousgeek.org, linux-arch@...r.kernel.org,
	Kyle McMartin <kyle@...artin.ca>,
	Tony Luck <tony.luck@...el.com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Jeff Dike <jdike@...toit.com>, linux-kernel@...r.kernel.org,
	Ralf Baechle <ralf@...ux-mips.org>,
	David Howells <dhowells@...hat.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Ingo Molnar <mingo@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Avi Kivity <avi@...hat.com>,
	Ian Campbell <Ian.Campbell@...citrix.com>
Subject: Re: [PATCH] PCI: remove pcibios_scan_all_fns()

On 06/23/09 15:41, Benjamin Herrenschmidt wrote:
>> Do you have any other cases in mind where it would be helpful?
>>     
>
> Well, it might be for virtual device discovery etc... but don't bother
> now. We might talk about it at KS for those interested. It's more
> something we see as useful for embedded archs at the moment but in the
> long run it might make sense for hypervisors as well.
>   

Perhaps.  We have Xenbus - which is  a little bit like OF in that it has
data in a hierarchical namespace - and I guess it might be possible to
find a mapping onto some generic OF-like interface.  However, Xenbus is
an active communication channel between virtual machines rather than a
static representation of a machine configuration (for example, you can
put a watch on a particular path to get a notification of when someone
else changes it).

But, yes, this is a good KS hallway track subject.

    J
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