From: sre@kernel.org (Sebastian Reichel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] ARM: update errata 430973 documentation
Date: Thu, 23 Jul 2015 02:48:02 +0200 [thread overview]
Message-ID: <1437612483-30160-3-git-send-email-sre@kernel.org> (raw)
In-Reply-To: <1437612483-30160-1-git-send-email-sre@kernel.org>
The Errata 430973 workaround config option only enables the
IBE bit, which should be done by the bootloader if possible.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
---
arch/arm/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1c50210..0e4929b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1078,6 +1078,10 @@ config ARM_ERRATA_430973
and also flushes the branch target cache at every context switch.
Note that setting specific bits in the ACTLR register may not be
available in non-secure mode.
+ Instead of enabling this option, it is recommended to enable the
+ workaround by setting the IBE bit from the bootloader, since the
+ BTB/BTAC operations are always executed for context switches on
+ Cortex-A8.
config ARM_ERRATA_458693
bool "ARM errata: Processor deadlock when a false hazard is created"
--
2.1.4
next prev parent reply other threads:[~2015-07-23 0:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-23 0:48 [PATCH 0/3] Another Errata 430973 Update Sebastian Reichel
2015-07-23 0:48 ` [PATCH 1/3] ARM: OMAP2+: N900: always enable IBE bit Sebastian Reichel
2015-07-23 7:28 ` Tony Lindgren
2015-10-05 13:53 ` Pavel Machek
2015-07-23 0:48 ` Sebastian Reichel [this message]
2015-07-23 0:48 ` [PATCH 3/3] ARM: errata 430973: move !ARCH_MULTIPLATFORM to Kconfig Sebastian Reichel
2015-07-23 12:35 ` Russell King - ARM Linux
2015-07-24 0:16 ` Sebastian Reichel
2015-07-26 22:51 ` Russell King - ARM Linux
2015-07-27 1:14 ` Sebastian Reichel
2015-07-27 9:59 ` Ben Dooks
2015-07-27 10:43 ` Russell King - ARM Linux
2015-07-27 17:36 ` Sebastian Reichel
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