From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] ARM: cache-l2c: Detect whether it's safe to unlock
Date: Fri, 15 May 2015 12:34:48 +0100 [thread overview]
Message-ID: <20150515113448.GI2067@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1431416355-7693-2-git-send-email-sjoerd.simons@collabora.co.uk>
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.
--
FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2015-05-15 11:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 7:39 [PATCH 0/2 v2] Fix boot on Calxeda highbank Sjoerd Simons
2015-05-12 7:39 ` [PATCH 1/2] ARM: cache-l2c: Detect whether it's safe to unlock Sjoerd Simons
2015-05-15 11:34 ` Russell King - ARM Linux [this message]
2015-05-27 13:00 ` Sjoerd Simons
2015-05-27 17:40 ` [PATCH 1/5] ARM: l2c: restore the behaviour documented above l2c_enable() Russell King
2015-05-27 17:40 ` [PATCH 2/5] ARM: l2c: write auxiliary control register first Russell King
2015-05-27 17:40 ` [PATCH 3/5] ARM: l2c: clean up l2c_configure() Russell King
2015-05-27 17:40 ` [PATCH 4/5] ARM: l2c: only unlock caches if NS_LOCKDOWN bit is set Russell King
2015-05-27 17:40 ` [PATCH 5/5] ARM: l2c: avoid passing auxiliary control register through enable method Russell King
2015-05-27 17:41 ` [PATCH 1/2] ARM: cache-l2c: Detect whether it's safe to unlock Russell King - ARM Linux
2015-05-12 7:39 ` [PATCH 2/2] ARM: l2c: highbank: Add dummy configure function Sjoerd Simons
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