From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregory.clement@free-electrons.com (Gregory CLEMENT) Date: Wed, 17 Jun 2015 16:28:22 +0200 Subject: [PATCH] ARM: mvebu: use DT properties to fine-tune the L2 configuration In-Reply-To: <1434023472-19851-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1434023472-19851-1-git-send-email-thomas.petazzoni@free-electrons.com> Message-ID: <55818406.3070703@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Thomas, On 11/06/2015 13:51, Thomas Petazzoni wrote: > In order to optimize the L2 cache performance, this commit adjusts the > configuration of the L2 on the Cortex-A9 based Marvell EBU processors > (Armada 375, 38x and 39x), using the appropriate DT properties. > > We enable double linefill, incr double linefill, data prefetch and > disable double linefill on wrap. This matches the configuration that > was fine tuned in the Marvell BSP. > > Signed-off-by: Thomas Petazzoni Acked-by: Gregory CLEMENT applied on mvebu/dt-4.3 Thanks, Gregory > --- > Enabling the data prefetching depends on a patch from "Hauke Mehrtens > ", [PATCH v4] ARM: l2c: add options to overwrite > prefetching behavior, which has been applied by Russell (see > http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8391/1) > but does not appear yet in his for-next branch. > --- > arch/arm/boot/dts/armada-375.dtsi | 4 ++++ > arch/arm/boot/dts/armada-38x.dtsi | 4 ++++ > arch/arm/boot/dts/armada-39x.dtsi | 4 ++++ > 3 files changed, 12 insertions(+) > > diff --git a/arch/arm/boot/dts/armada-375.dtsi b/arch/arm/boot/dts/armada-375.dtsi > index f076ff8..4d4964b 100644 > --- a/arch/arm/boot/dts/armada-375.dtsi > +++ b/arch/arm/boot/dts/armada-375.dtsi > @@ -176,6 +176,10 @@ > reg = <0x8000 0x1000>; > cache-unified; > cache-level = <2>; > + arm,double-linefill-incr = <1>; > + arm,double-linefill-wrap = <0>; > + arm,double-linefill = <1>; > + prefetch-data = <1>; > }; > > scu at c000 { > diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi > index 218a2ac..a86d1dc 100644 > --- a/arch/arm/boot/dts/armada-38x.dtsi > +++ b/arch/arm/boot/dts/armada-38x.dtsi > @@ -143,6 +143,10 @@ > reg = <0x8000 0x1000>; > cache-unified; > cache-level = <2>; > + arm,double-linefill-incr = <1>; > + arm,double-linefill-wrap = <0>; > + arm,double-linefill = <1>; > + prefetch-data = <1>; > }; > > scu at c000 { > diff --git a/arch/arm/boot/dts/armada-39x.dtsi b/arch/arm/boot/dts/armada-39x.dtsi > index ecd1318..06d9cc5 100644 > --- a/arch/arm/boot/dts/armada-39x.dtsi > +++ b/arch/arm/boot/dts/armada-39x.dtsi > @@ -104,6 +104,10 @@ > reg = <0x8000 0x1000>; > cache-unified; > cache-level = <2>; > + arm,double-linefill-incr = <1>; > + arm,double-linefill-wrap = <0>; > + arm,double-linefill = <1>; > + prefetch-data = <1>; > }; > > scu at c000 { > -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com