From: will.deacon@arm•com (Will Deacon)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv2] arm64: Add atomic pool for non-coherent and CMA allocaitons.
Date: Wed, 4 Jun 2014 18:59:30 +0100 [thread overview]
Message-ID: <20140604175930.GB27881@arm.com> (raw)
In-Reply-To: <538E689A.3050109@codeaurora.org>
On Wed, Jun 04, 2014 at 01:30:18AM +0100, Laura Abbott wrote:
> On 6/3/2014 6:28 AM, Will Deacon wrote:
> > Hi Laura,
> >
> > On Mon, Jun 02, 2014 at 09:03:52PM +0100, Laura Abbott wrote:
> >> Neither CMA nor noncoherent allocations support atomic allocations.
> >> Add a dedicated atomic pool to support this.
> >>
> >> Change-Id: I46c8fdffe5e0687403d42b37643137c8cf344259
> >> Signed-off-by: Laura Abbott <lauraa@codeaurora•org>
> >> ---
> >>
> >> v2: Various bug fixes pointed out by David and Ritesh (CMA dependency, swapping
> >> coherent, noncoherent). I'm still not sure how to address the devicetree
> >> suggestion by Will [1][2]. I added the devicetree mailing list this time around
> >> to get more input on this.
> >>
> >> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-April/249180.html
> >> [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-April/249528.html
> >
> > Perhaps that can be done later then, since from what you're saying, we need
> > the command-line option either way? Have you looked at how this fits in with
> > the iommu-helper work from Ritesh? We could put the parameter parsing in
> > there too.
> >
>
> This doesn't seem to overlap with Ritesh's work. The atomic mapping is still
> handled in the arm specific code so I assume it would be handled in the arm64
> specific code as well. Another question might be is if it would be useful to
> make the atomic code common somehow between arm and arm64.
Yeah, that's what I was alluding to. The more of this code that can be
shared between architectures, the better.
Will
next prev parent reply other threads:[~2014-06-04 17:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-02 20:03 [PATCHv2] arm64: Add atomic pool for non-coherent and CMA allocaitons Laura Abbott
2014-06-03 0:23 ` David Riley
2014-06-03 13:28 ` Will Deacon
2014-06-04 0:30 ` Laura Abbott
2014-06-04 17:59 ` Will Deacon [this message]
2014-06-05 17:05 ` Catalin Marinas
2014-06-07 0:55 ` Laura Abbott
2014-06-09 9:27 ` Catalin Marinas
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