This is a note to let you know that I've just added the patch titled
ARM: highbank: avoid L2 cache smc calls when PL310 is not
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-highbank-avoid-l2-cache-smc-calls-when-pl310-is-not.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From a56a5cf1f2ec895599eace0ac6eba1e4a489e4bf Mon Sep 17 00:00:00 2001
From: Rob Herring <[email protected]>
Date: Sat, 17 Aug 2013 20:10:28 -0500
Subject: ARM: highbank: avoid L2 cache smc calls when PL310 is not
present
From: Rob Herring <[email protected]>
commit a56a5cf1f2ec895599eace0ac6eba1e4a489e4bf upstream.
While Midway firmware handles L2 smc calls as nops, the custom smc calls
present a problem when running virtualized Midway guest. They aren't
needed so just avoid calling them.
In the process, cleanup the L2X0 ifdefs and use IS_ENABLED instead.
Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Ian Campbell <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/mach-highbank/highbank.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -65,14 +65,12 @@ void highbank_set_cpu_jump(int cpu, void
HB_JUMP_TABLE_PHYS(cpu) + 15);
}
-#ifdef CONFIG_CACHE_L2X0
static void highbank_l2x0_disable(void)
{
outer_flush_all();
/* Disable PL310 L2 Cache controller */
highbank_smc1(0x102, 0x0);
}
-#endif
static void __init highbank_init_irq(void)
{
@@ -81,12 +79,13 @@ static void __init highbank_init_irq(voi
if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
highbank_scu_map_io();
-#ifdef CONFIG_CACHE_L2X0
/* Enable PL310 L2 Cache controller */
- highbank_smc1(0x102, 0x1);
- l2x0_of_init(0, ~0UL);
- outer_cache.disable = highbank_l2x0_disable;
-#endif
+ if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
+ of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) {
+ highbank_smc1(0x102, 0x1);
+ l2x0_of_init(0, ~0UL);
+ outer_cache.disable = highbank_l2x0_disable;
+ }
}
static void __init highbank_timer_init(void)
Patches currently in stable-queue which might be from [email protected]
are
queue-3.10/arm-highbank-avoid-l2-cache-smc-calls-when-pl310-is-not.patch
queue-3.10/arm-move-outer_cache-declaration-out-of-ifdef.patch
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