From: Russell King - ARM Linux <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
To: Dave Martin <Dave.Martin-5wv7dgnIgG8@public.gmane.org>
Cc: Lorenzo Pieralisi
<lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Kevin Hilman <khilman-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Vincent Guittot
<vincent.guittot-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Nicolas Pitre <nico-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Amit Kucheria
<amit.kucheria-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Tomasz Figa <t.figa-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Daniel Lezcano
<daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Santosh Shilimkar
<santosh.shilimkar-l0cyMroinI0@public.gmane.org>,
Antti Miettinen <ananaza-X3B1VOXEql0@public.gmane.org>,
Mark Hambleton
<mark.hambleton-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>,
linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Grant Likely
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Hanjun Guo <hanjun.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Peter De Schrijver
<pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Charles Garcia Tobin
<Charles.Garcia-Tobin-5wv7dgnIgG8@public.gmane.org>
Subject: Re: [PATCH RFC v2 1/2] Documentation: arm: add cache DT bindings
Date: Mon, 27 Jan 2014 12:58:39 +0000 [thread overview]
Message-ID: <20140127125839.GL15937@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20140121114845.GA2598-M5GwZQ6tE7x5pKCnmE3YQBJ8xKzm50AiAL8bYrjMMd8@public.gmane.org>
On Tue, Jan 21, 2014 at 11:49:01AM +0000, Dave Martin wrote:
> I do have a worry that because the kernel won't normally use this
> information, by default it will get pasted between .dts files, won't get
> tested and will be wrong rather often. It also violates the DT principle
> that probeable information should not be present in the DT -- ePAPR
> obviously envisages systems where cache geometry information is not
> probeable, but that's not the case for architected caches on ARM, except
> in rare cases where the CLIDR is wrong.
That statement is wrong. There are caches on ARM CPUs where there is no
CLIDR register. I suggest reading the earlier DDI0100 revisions.
--
FTTC broadband for 0.8mile line: 5.8Mbps down 500kbps up. Estimation
in database were 13.1 to 19Mbit for a good line, about 7.5+ for a bad.
Estimate before purchase was "up to 13.2Mbit".
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next prev parent reply other threads:[~2014-01-27 12:58 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-20 17:47 [PATCH RFC v2 0/2] ARM: defining power states DT bindings Lorenzo Pieralisi
2014-01-20 17:47 ` [PATCH RFC v2 1/2] Documentation: arm: add cache " Lorenzo Pieralisi
2014-01-21 11:49 ` Dave Martin
2014-01-21 14:47 ` Lorenzo Pieralisi
[not found] ` <20140121114845.GA2598-M5GwZQ6tE7x5pKCnmE3YQBJ8xKzm50AiAL8bYrjMMd8@public.gmane.org>
2014-01-27 12:58 ` Russell King - ARM Linux [this message]
2014-01-27 18:10 ` Lorenzo Pieralisi
2014-01-20 17:47 ` [PATCH RFC v2 2/2] Documentation: arm: define DT C-states bindings Lorenzo Pieralisi
2014-01-21 11:16 ` Vincent Guittot
2014-01-21 13:31 ` Lorenzo Pieralisi
2014-01-21 14:35 ` Amit Kucheria
2014-01-21 15:23 ` Lorenzo Pieralisi
2014-01-22 11:52 ` Mark Brown
2014-01-22 16:23 ` Lorenzo Pieralisi
2014-01-22 18:17 ` Mark Brown
2014-01-22 11:42 ` Mark Brown
2014-01-22 16:33 ` Lorenzo Pieralisi
2014-01-22 18:11 ` Mark Brown
2014-01-22 19:20 ` Lorenzo Pieralisi
2014-01-24 8:40 ` Vincent Guittot
2014-01-24 17:58 ` Lorenzo Pieralisi
2014-01-28 8:24 ` Vincent Guittot
2014-01-29 12:42 ` Lorenzo Pieralisi
2014-01-25 8:15 ` Antti P Miettinen
2014-01-27 11:41 ` Lorenzo Pieralisi
2014-01-27 12:48 ` Antti P Miettinen
2014-01-27 18:22 ` Lorenzo Pieralisi
-- strict thread matches above, loose matches on Subject: below --
2014-01-27 18:11 [PATCH RFC v2 1/2] Documentation: arm: add cache DT bindings Dave Martin
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