From: Gregory CLEMENT <gregory.clement@free-electrons.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
linux-arm-kernel@lists.infradead.org,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Boris BREZILLON <boris.brezillon@free-electrons.com>,
Lior Amsalem <alior@marvell.com>,
Tawfik Bayouk <tawfik@marvell.com>,
Nadav Haklai <nadavh@marvell.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v4 1/2] ARM: dma-mapping: Don't use outer_flush_range when the L2C is coherent
Date: Wed, 30 Sep 2015 11:28:07 +0200 [thread overview]
Message-ID: <87fv1wqms8.fsf@free-electrons.com> (raw)
In-Reply-To: <20150929171054.GN21513@n2100.arm.linux.org.uk> (Russell King's message of "Tue, 29 Sep 2015 18:10:54 +0100")
Hi Russell,
On mar., sept. 29 2015, Russell King - ARM Linux <linux@arm.linux.org.uk> wrote:
> On Tue, Sep 29, 2015 at 06:50:57PM +0200, Gregory CLEMENT wrote:
>> When a L2 cache controller is used in a system that provides hardware
>
> You're talking about L2 cache here, but you're also masking out the L1
> cache maintanence (dmac_*) too. It's my understanding that we don't
> yet support coherency to L1 yet.
Do you suggest to not masking the dmac_* operation ?
Initially I tought that L1 and L2 cache maintanence operation were more
or less linked but I might mix up.
Thanks,
Gregory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
prev parent reply other threads:[~2015-09-30 9:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1443545458-14807-1-git-send-email-gregory.clement@free-electrons.com>
2015-09-29 16:50 ` [PATCH v4 1/2] ARM: dma-mapping: Don't use outer_flush_range when the L2C is coherent Gregory CLEMENT
2015-09-29 17:10 ` Russell King - ARM Linux
2015-09-29 17:30 ` Thomas Petazzoni
2015-09-29 17:48 ` Russell King - ARM Linux
2015-09-29 17:55 ` Thomas Petazzoni
2015-09-30 9:28 ` Gregory CLEMENT [this message]
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