From: gregory.clement@free-electrons•com (Gregory CLEMENT)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 02/17] ARM: mvebu: enable strex backoff delay
Date: Mon, 03 Nov 2014 18:08:46 +0100 [thread overview]
Message-ID: <5457B69E.7020508@free-electrons.com> (raw)
In-Reply-To: <1414151970-6626-3-git-send-email-thomas.petazzoni@free-electrons.com>
Hi Thomas,
On 24/10/2014 13:59, Thomas Petazzoni wrote:
> From: Nadav Haklai <nadavh@marvell•com>
>
> Under extremely rare conditions, in an MPCore node consisting of at
> least 3 CPUs, two CPUs trying to perform a STREX to data on the same
> shared cache line can enter a livelock situation.
>
> This patch enables the HW mechanism that overcomes the bug. This fixes
> the incorrect setup of the STREX backoff delay bit due to a wrong
> description in the specification.
>
> Note that enabling the STREX backoff delay mechanism is done by
> leaving the bit *cleared*, while the bit was currently being set by
> the proc-v7.S code.
>
> [Thomas: adapt to latest mainline, slightly reword the commit log, add
> stable markers.]
>
> Cc: Russell King <linux@arm•linux.org.uk>
> Cc: <stable@vger•kernel.org> # v3.8+
> Fixes: de4901933f6d ("arm: mm: Add support for PJ4B cpu and init routines")
> Signed-off-by: Nadav Haklai <nadavh@marvell•com>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>
> ---
> This patch is submitted as part of the suspend/resume work, because
> the suspend/resume path is triggering this rare bug in a very
> reproducible fashion.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>
> ---
> arch/arm/mm/proc-v7.S | 2 --
> 1 file changed, 2 deletions(-)
>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons•com>
Thanks,
Gregory
--
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:[~2014-11-03 17:08 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 11:59 [PATCH 00/17] Suspend to RAM support for Armada XP Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 01/17] Documentation: dt-bindings: minimal documentation for MVEBU SDRAM controller Thomas Petazzoni
2014-11-03 17:05 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 02/17] ARM: mvebu: enable strex backoff delay Thomas Petazzoni
2014-11-03 17:08 ` Gregory CLEMENT [this message]
2014-10-24 11:59 ` [PATCH 03/17] irqchip: irq-armada-370-xp: use proper return value for ->set_affinity() Thomas Petazzoni
2014-11-03 17:20 ` Gregory CLEMENT
2014-11-07 4:09 ` Jason Cooper
2014-10-24 11:59 ` [PATCH 04/17] irqchip: irq-armada-370-xp: suspend/resume support Thomas Petazzoni
2014-11-03 17:38 ` Gregory CLEMENT
2014-11-13 16:32 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 05/17] clocksource: time-armada-370-xp: add " Thomas Petazzoni
2014-11-03 17:45 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 06/17] gpio: mvebu: " Thomas Petazzoni
2014-10-24 16:30 ` David Cohen
2014-10-24 20:45 ` Andrew Lunn
2014-10-27 5:27 ` Alexandre Courbot
2014-10-27 17:45 ` David Cohen
2014-10-31 7:00 ` Linus Walleij
2014-10-31 7:52 ` Gregory CLEMENT
2014-10-31 8:14 ` Thomas Petazzoni
2014-11-03 13:26 ` Linus Walleij
2014-11-03 13:29 ` Linus Walleij
2014-11-03 17:53 ` Gregory CLEMENT
2014-11-03 21:21 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 07/17] bus: mvebu-mbus: " Thomas Petazzoni
2014-11-03 18:08 ` Gregory CLEMENT
2014-11-03 21:20 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 08/17] bus: mvebu-mbus: provide a mechanism to save SDRAM window configuration Thomas Petazzoni
2014-11-04 9:17 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 09/17] clk: mvebu: add suspend/resume for gatable clocks Thomas Petazzoni
2014-11-04 9:32 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 10/17] ARM: mvebu: implement suspend/resume support for Armada XP Thomas Petazzoni
2014-11-04 10:00 ` Gregory CLEMENT
2014-11-13 17:00 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 11/17] ARM: mvebu: reserve the first 10 KB of each memory bank for suspend/resume Thomas Petazzoni
2014-11-04 10:09 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 12/17] ARM: mvebu: Armada XP GP specific suspend/resume code Thomas Petazzoni
2014-10-24 14:20 ` Andrew Lunn
2014-10-24 14:28 ` Thomas Petazzoni
2014-10-24 14:51 ` Andrew Lunn
2014-10-27 12:51 ` Thomas Petazzoni
2014-10-27 14:19 ` Andrew Lunn
2014-10-27 14:40 ` Thomas Petazzoni
2014-10-27 14:59 ` Andrew Lunn
2014-10-27 15:12 ` Thomas Petazzoni
2014-10-27 15:15 ` Andrew Lunn
2014-11-10 13:53 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 13/17] ARM: mvebu: make sure MMU is disabled in armada_370_xp_cpu_resume Thomas Petazzoni
2014-11-10 14:05 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 14/17] ARM: mvebu: synchronize secondary CPU clocks on resume Thomas Petazzoni
2014-11-10 14:12 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 15/17] ARM: mvebu: add suspend/resume DT information for Armada XP GP Thomas Petazzoni
2014-11-10 14:14 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 16/17] ARM: mvebu: adjust mbus controller description on Armada 370/XP Thomas Petazzoni
2014-11-10 14:15 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 17/17] ARM: mvebu: add SDRAM controller description for Armada XP Thomas Petazzoni
2014-11-10 14:25 ` Gregory CLEMENT
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