From: broonie@kernel.org (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/3] arm64: topology: Add support for topology DT bindings
Date: Fri, 21 Mar 2014 15:36:45 +0000 [thread overview]
Message-ID: <20140321153645.GA552@sirena.org.uk> (raw)
In-Reply-To: <20140321150118.GH13596@arm.com>
On Fri, Mar 21, 2014 at 03:01:18PM +0000, Catalin Marinas wrote:
> On Fri, Mar 21, 2014 at 11:13:53AM +0000, Mark Brown wrote:
> > One thing that occurs to me with this - if we've always got a DT even if
> > we are booting with ACPI that might confuse code that implements
> > handling for firmware idioms.
> The DT presented on an ACPI-capable system only contains the chosen
> node (I guess the DT will not even be unflattened) .So the topology
> code would check for DT, if not it would check for ACPI (or the other
> way around) and only after that fall back to hardware MPIDR. I'm not
> sure whether current ACPI gives us rich enough information about
> topology like DT, in which case it could simply use MPIDR.
Sorry, this isn't related to topology - it's to do with other code that
checks if a DT was present and makes decisions based on that. So long
as of_have_populated_dt() doesn't report true things should be fine but
it's something to watch out for.
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next prev parent reply other threads:[~2014-03-21 15:36 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-19 18:02 [PATCH 1/3] arm64: topology: Add support for topology DT bindings Mark Brown
2014-03-19 18:02 ` [PATCH 2/3] arm64: topology: Tell the scheduler about the relative power of cores Mark Brown
2014-03-19 18:02 ` [PATCH 3/3] arm64: topology: Provide relative power numbers for cores Mark Brown
2014-03-20 11:26 ` [PATCH 1/3] arm64: topology: Add support for topology DT bindings Lorenzo Pieralisi
2014-03-20 13:43 ` Mark Brown
2014-03-20 17:19 ` Catalin Marinas
2014-03-20 17:52 ` Mark Brown
2014-03-21 14:52 ` Catalin Marinas
2014-03-21 11:13 ` Mark Brown
2014-03-21 15:01 ` Catalin Marinas
2014-03-21 15:36 ` Mark Brown [this message]
2014-03-20 18:08 ` Lorenzo Pieralisi
2014-03-21 11:32 ` Mark Brown
2014-03-21 15:16 ` Lorenzo Pieralisi
2014-03-21 16:06 ` Mark Brown
-- strict thread matches above, loose matches on Subject: below --
2014-03-05 8:59 Mark Brown
2014-03-19 16:04 ` Lorenzo Pieralisi
2014-03-19 16:33 ` Mark Brown
2014-03-19 16:50 ` Lorenzo Pieralisi
2014-03-19 17:03 ` Mark Brown
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