linux-stable.git/arch/arm/include/asm/outercache.h, branch v4.1 Linux kernel stable tree ARM: 8260/1: l2c: Add interface to ask hypervisor to configure L2C 2015-01-16T14:35:31+00:00 Tomasz Figa t.figa@samsung.com 2015-01-08T06:51:07+00:00 c6d1a2d0078a30eb6290428a858c4e790a0e8691 Because certain secure hypervisor do not allow writes to individual L2C registers, but rather expect set of parameters to be passed as argument to secure monitor calls, there is a need to provide an interface for the L2C driver to ask the firmware to configure the hardware according to specified parameters. This patch adds such. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Nishanth Menon <nm@ti.com> Acked-by: Nishanth Menon <nm@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Because certain secure hypervisor do not allow writes to individual L2C
registers, but rather expect set of parameters to be passed as argument
to secure monitor calls, there is a need to provide an interface for the
L2C driver to ask the firmware to configure the hardware according to
specified parameters. This patch adds such.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: l2c: remove old .set_debug method 2014-05-29T23:50:35+00:00 Russell King rmk+kernel@arm.linux.org.uk 2014-03-16T19:38:25+00:00 678ea28b7c3cc9a7196192dc77dfc13513db3d5f We no longer need or require the .set_debug method; we handle everything it used to do via the .write_sec method instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
We no longer need or require the .set_debug method; we handle everything
it used to do via the .write_sec method instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: l2c: provide generic hook to intercept writes to secure registers 2014-05-29T23:48:39+00:00 Russell King rmk+kernel@arm.linux.org.uk 2014-03-16T17:38:08+00:00 8abd259f657d5742f96ffd46ed65feb11c44b1fb When Linux is running in the non-secure world, any write to a secure L2C register will generate an abort. Platforms normally have to call firmware to work around this. Provide a hook for them to intercept any L2C secure register write. l2c_write_sec() avoids writes to secure registers which are already set to the appropriate value, thus avoiding the overhead of needlessly calling into the secure monitor. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
When Linux is running in the non-secure world, any write to a secure
L2C register will generate an abort.  Platforms normally have to call
firmware to work around this.  Provide a hook for them to intercept
any L2C secure register write.

l2c_write_sec() avoids writes to secure registers which are already set
to the appropriate value, thus avoiding the overhead of needlessly
calling into the secure monitor.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: outer cache: add WARN_ON() to outer_disable() 2014-05-29T23:47:23+00:00 Russell King rmk+kernel@arm.linux.org.uk 2014-03-16T13:14:38+00:00 1f1d5b745a4617a2cb2ffd8f4a9bc3be664cfc98 Add WARN_ON() conditions to outer_disable() to ensure that its requirements aren't violated. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add WARN_ON() conditions to outer_disable() to ensure that its
requirements aren't violated.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: outer cache: add documentation of outer cache functions 2014-05-22T15:38:46+00:00 Russell King rmk+kernel@arm.linux.org.uk 2014-03-16T10:52:55+00:00 bc4f94d85cad6035d02d2bed1b27f9bea7e7b6e6 Add some documentation to cover the outer cache functions so that their requirements can be better understood. Of particular note are the flush_all() and disable() methods which must not be called except in very specific circumstances. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add some documentation to cover the outer cache functions so that their
requirements can be better understood.  Of particular note are the
flush_all() and disable() methods which must not be called except in
very specific circumstances.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: l2c: remove outer_inv_all() method 2014-05-22T15:21:35+00:00 Russell King rmk+kernel@arm.linux.org.uk 2014-03-15T16:47:44+00:00 265c271c822bd57677e3b286389487fd45e6960d No one ever calls this function anywhere in the kernel, so let's completely remove it from the outer cache API and turn it into an internal-only thing. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
No one ever calls this function anywhere in the kernel, so let's
completely remove it from the outer cache API and turn it into an
internal-only thing.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: move outer_cache declaration out of ifdef 2013-08-23T01:48:41+00:00 Rob Herring rob.herring@calxeda.com 2013-08-18T01:12:57+00:00 0b53c11d533a8f6688d73fad0baf67dd08ec1b90 Move the outer_cache declaration of the CONFIG_OUTER_CACHE ifdef so that outer_cache can be used inside IS_ENABLED condition. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> 
Move the outer_cache declaration of the CONFIG_OUTER_CACHE ifdef so that
outer_cache can be used inside IS_ENABLED condition.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
ARM: 7639/1: cache-l2x0: add missed dummy outer_resume entry 2013-02-06T09:33:07+00:00 Barry Song Baohua.Song@csr.com 2013-02-04T06:46:57+00:00 4e79a62d84b9a3b84c609d73382415c71d911a4c Commit 91c2ebb90b1890a (ARM: 7114/1: cache-l2x0: add resume entry for l2 in secure mode) added resume entry for l2 in secure mode, but it missed the dummy entry when CONFIG_CACHE_L2X0 is not set. (Commit text edited by rmk.) Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Commit 91c2ebb90b1890a (ARM: 7114/1: cache-l2x0: add resume entry for l2
in secure mode) added resume entry for l2 in secure mode, but it missed
the dummy entry when CONFIG_CACHE_L2X0 is not set.

(Commit text edited by rmk.)

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 7114/1: cache-l2x0: add resume entry for l2 in secure mode 2011-10-17T08:11:51+00:00 Barry Song Baohua.Song@csr.com 2011-09-30T13:43:12+00:00 91c2ebb90b1890abc648ba9dec5608cbc97e1cb9 we save the l2x0 registers at the first initialization, and platform codes can get them to restore l2x0 status after wakeup. Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
we save the l2x0 registers at the first initialization, and platform codes
can get them to restore l2x0 status after wakeup.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Merge branches 'fixes', 'pgt-next' and 'versatile' into devel 2011-03-20T09:32:12+00:00 Russell King rmk+kernel@arm.linux.org.uk 2011-03-20T09:32:12+00:00 196f020fbbb83d246960548e73a40fd08f3e7866