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ARM: l2c: only unlock caches if NS_LOCKDOWN bit is set
authorRussell King <rmk+kernel@arm.linux.org.uk>
Fri, 15 May 2015 10:51:51 +0000 (11:51 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Fri, 15 May 2015 19:30:12 +0000 (20:30 +0100)
commite946a8cbe4a47a7c2615ffb0d45712e72c7d0f3a
tree22d4cf07324179939951ed6c08fb8e7118a87962tree | snapshot
parent50beefde30224888d6d63224405ace4bdd4b32a0commit | diff
ARM: l2c: only unlock caches if NS_LOCKDOWN bit is set

Some L2C caches have a bit which allows non-secure software to control
the cache lockdown.  Some platforms are unable to set this bit.  To
avoid receiving an abort while trying to unlock the cache lines, check
the state of this bit before unlocking.  We do this by providing a new
method in the l2c_init_data to perform the unlocking.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/mm/cache-l2x0.c diff | blob | history
Linux kernel for KaRo TX COM modules