[PATCH v10 02/11] ARM: mcpm: support 4 clusters

Haojian Zhuang
2014-07-10T02:04:01Z

Add the CONFIG_MCPM_QUAD_CLUSTER configuration to enlarge cluster number
from 2 to 4.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
---
arch/arm/Kconfig | 9 +++++++++
arch/arm/include/asm/mcpm.h | 5 +++++
2 files changed, 14 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 87b63fd..10cc6ec 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1490,6 +1490,15 @@ config MCPM
for (multi-)cluster based systems, such as big.LITTLE based
systems.

+config MCPM_QUAD_CLUSTER
+ bool
+ depends on MCPM
+ help
+ To avoid wasting resources unnecessarily, MCPM only supports up
+ to 2 clusters by default.
+ Platforms with 3 or 4 clusters that use MCPM must select this
+ option to allow the additional clusters to be managed.
+
config BIG_LITTLE
bool "big.LITTLE support (Experimental)"
depends on CPU_V7 && SMP
diff --git a/arch/arm/include/asm/mcpm.h b/arch/arm/include/asm/mcpm.h
index d9702eb..a4fbacc 100644
--- a/arch/arm/include/asm/mcpm.h
+++ b/arch/arm/include/asm/mcpm.h
@@ -20,7 +20,12 @@
* to consider dynamic allocation.
*/
#define MAX_CPUS_PER_CLUSTER 4
+
+#ifdef CONFIG_MCPM_QUAD_CLUSTER
+#define MAX_NR_CLUSTERS 4
+#else
#define MAX_NR_CLUSTERS 2
+#endif

#ifndef __ASSEMBLY__

--
1.9.1