From: gregory.clement@free-electrons.com (Gregory CLEMENT)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/9] arm: mvebu: Align the internal registers virtual base to support LPAE
Date: Fri, 05 Apr 2013 23:13:58 +0200 [thread overview]
Message-ID: <515F3E96.4040307@free-electrons.com> (raw)
In-Reply-To: <201304052250.28641.arnd@arndb.de>
On 04/05/2013 10:50 PM, Arnd Bergmann wrote:
> On Friday 05 April 2013, Gregory CLEMENT wrote:
>> From: Lior Amsalem <alior@marvell.com>
>>
>> In order to be able to support he LPAE, the internal registers virtual
>> base must be aligned to 2MB.
>>
>> Signed-off-by: Lior Amsalem <alior@marvell.com>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
>
> This is a surprising limitation. Can you extend the above text to go into more
> detail where that alignment requirement comes from?
>
The explanation I had was that in LPAE section size is 2MB, in earlyprintk we map
the internal registers and it must be section aligned.
> Arnd
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
WARNING: multiple messages have this Message-ID (diff)
From: Gregory CLEMENT <gregory.clement@free-electrons.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Lior Amsalem <alior@marvell.com>, Andrew Lunn <andrew@lunn.ch>,
Ike Pan <ike.pan@canonical.com>,
Grant Likely <grant.likely@secretlab.ca>,
David Marlin <dmarlin@redhat.com>,
Yehuda Yitschak <yehuday@marvell.com>,
Tawfik Bayouk <tawfik@marvell.com>,
Dan Frazier <dann.frazier@canonical.com>,
Eran Ben-Avi <benavi@marvell.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
Leif Lindholm <leif.lindholm@arm.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Jason Cooper <jason@lakedaemon.net>,
Nadav Haklai <nadavh@marvell.com>, Jon Masters <jcm@redhat.com>,
devicetree-discuss@lists.ozlabs.org,
Rob Herring <rob.herring@calxeda.com>,
linux-arm-kernel@lists.infradead.org,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Chris Van Hoof <vanhoof@canonical.com>,
Nicolas Pitre <nico@fluxnic.net>,
linux-kernel@vger.kernel.org, Maen Suleiman <maen@marvell.com>
Subject: Re: [PATCH v2 2/9] arm: mvebu: Align the internal registers virtual base to support LPAE
Date: Fri, 05 Apr 2013 23:13:58 +0200 [thread overview]
Message-ID: <515F3E96.4040307@free-electrons.com> (raw)
In-Reply-To: <201304052250.28641.arnd@arndb.de>
On 04/05/2013 10:50 PM, Arnd Bergmann wrote:
> On Friday 05 April 2013, Gregory CLEMENT wrote:
>> From: Lior Amsalem <alior@marvell.com>
>>
>> In order to be able to support he LPAE, the internal registers virtual
>> base must be aligned to 2MB.
>>
>> Signed-off-by: Lior Amsalem <alior@marvell.com>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
>
> This is a surprising limitation. Can you extend the above text to go into more
> detail where that alignment requirement comes from?
>
The explanation I had was that in LPAE section size is 2MB, in earlyprintk we map
the internal registers and it must be section aligned.
> Arnd
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
WARNING: multiple messages have this Message-ID (diff)
From: Gregory CLEMENT <gregory.clement@free-electrons.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Lior Amsalem <alior@marvell.com>, Andrew Lunn <andrew@lunn.ch>,
Ike Pan <ike.pan@canonical.com>,
Grant Likely <grant.likely@secretlab.ca>,
David Marlin <dmarlin@redhat.com>,
Yehuda Yitschak <yehuday@marvell.com>,
Tawfik Bayouk <tawfik@marvell.com>,
Dan Frazier <dann.frazier@canonical.com>,
Eran Ben-Avi <benavi@marvell.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
Leif Lindholm <leif.lindholm@arm.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Jason Cooper <jason@lakedaemon.net>,
Nadav Haklai <nadavh@marvell.com>, Jon Masters <jcm@redhat.com>,
devicetree-discuss@lists.ozlabs.org,
Rob Herring <rob.herring@calxeda.com>,
linux-arm-kernel@lists.infradead.org,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Chris Van Hoof <vanhoof@canonical.com>,
Nicolas Pitre <nico@fluxnic.net>,
linux-kernel@vger.kernel.org, Maen Suleiman <maen@marvell.com>,
Shadi Ammouri <shadi@marvell.com>,
Olof Johansson <olof@lixom.net>
Subject: Re: [PATCH v2 2/9] arm: mvebu: Align the internal registers virtual base to support LPAE
Date: Fri, 05 Apr 2013 23:13:58 +0200 [thread overview]
Message-ID: <515F3E96.4040307@free-electrons.com> (raw)
In-Reply-To: <201304052250.28641.arnd@arndb.de>
On 04/05/2013 10:50 PM, Arnd Bergmann wrote:
> On Friday 05 April 2013, Gregory CLEMENT wrote:
>> From: Lior Amsalem <alior@marvell.com>
>>
>> In order to be able to support he LPAE, the internal registers virtual
>> base must be aligned to 2MB.
>>
>> Signed-off-by: Lior Amsalem <alior@marvell.com>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
>
> This is a surprising limitation. Can you extend the above text to go into more
> detail where that alignment requirement comes from?
>
The explanation I had was that in LPAE section size is 2MB, in earlyprintk we map
the internal registers and it must be section aligned.
> Arnd
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2013-04-05 21:13 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-05 20:23 [PATCH v2 0/9] rm: mvebu: Enable LPAE support for Armada XP SoCs Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` [PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:41 ` Arnd Bergmann
2013-04-05 20:41 ` Arnd Bergmann
2013-04-05 20:41 ` Arnd Bergmann
2013-04-05 20:59 ` Gregory CLEMENT
2013-04-05 20:59 ` Gregory CLEMENT
2013-04-05 20:59 ` Gregory CLEMENT
2013-04-05 20:23 ` [PATCH v2 2/9] arm: mvebu: Align the internal registers virtual base to support LPAE Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:50 ` Arnd Bergmann
2013-04-05 20:50 ` Arnd Bergmann
2013-04-05 20:50 ` Arnd Bergmann
2013-04-05 21:13 ` Gregory CLEMENT [this message]
2013-04-05 21:13 ` Gregory CLEMENT
2013-04-05 21:13 ` Gregory CLEMENT
2013-04-06 8:31 ` Arnd Bergmann
2013-04-06 8:31 ` Arnd Bergmann
2013-04-06 8:31 ` Arnd Bergmann
2013-04-05 20:23 ` [PATCH v2 3/9] arm: mvebu: Enable pj4b on LPAE compilations Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` [PATCH v2 4/9] arm: dts: Add a 64 bits version of the skeleton device tree Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:23 ` Gregory CLEMENT
2013-04-05 20:24 ` [PATCH v2 5/9] arm: dts: mvebu: move all peripherals inside soc Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` [PATCH v2 6/9] arm: dts: mvebu: Convert all the mvebu files to use the range property Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` [PATCH v2 7/9] arm: dts: mvebu: introduce internal-regs node Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:43 ` Arnd Bergmann
2013-04-05 20:43 ` Arnd Bergmann
2013-04-05 20:43 ` Arnd Bergmann
2013-04-05 20:48 ` Gregory CLEMENT
2013-04-05 20:48 ` Gregory CLEMENT
2013-04-05 20:48 ` Gregory CLEMENT
2013-04-05 20:24 ` [PATCH v2 8/9] arm: dts: mvebu: fix cpus section indentation Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:45 ` Arnd Bergmann
2013-04-05 20:45 ` Arnd Bergmann
2013-04-05 20:45 ` Arnd Bergmann
2013-04-05 20:24 ` [PATCH v2 9/9] arm: dts: mvebu: Convert mvebu device tree files to 64 bits Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:24 ` Gregory CLEMENT
2013-04-05 20:46 ` [PATCH v2 0/9] rm: mvebu: Enable LPAE support for Armada XP SoCs Arnd Bergmann
2013-04-05 20:46 ` Arnd Bergmann
2013-04-05 20:46 ` Arnd Bergmann
2013-04-05 21:10 ` Gregory CLEMENT
2013-04-05 21:10 ` Gregory CLEMENT
2013-04-05 21:10 ` Gregory CLEMENT
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