Messages in this thread | | | Date | Fri, 15 May 2015 12:34:48 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH 1/2] ARM: cache-l2c: Detect whether it's safe to unlock |
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On Tue, May 12, 2015 at 09:39:14AM +0200, Sjoerd Simons wrote: > The L2C cache should only be unlocked when the cache is setup to allow > that. In the common case the l2x0 driver sets up the cache for that to > be the case (e.g. setting L310_AUX_CTRL_NS_LOCKDOWN on L2C-310), making > unlock safe. However when a secure firmware is in use, it may not be > possible for the L2c to be configured that way making unlocking unsafe. > > To handle that, for caches where special configuration is needed to allow > unlocking, check whether this has been setup before unlocking.
I've come up with a different solution to this, which of course I prefer. I'll post the patches later today, thanks.
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