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[v17,1/9] ARM: mcpm: support 4 clusters

Message ID 1407408695-19626-2-git-send-email-haojian.zhuang@linaro.org
State Accepted
Commit ebf4a5c5b4027b682ed8877a938e6d1d92f37745
Headers show

Commit Message

Haojian Zhuang Aug. 7, 2014, 10:51 a.m. UTC 
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(+)
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Patch

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__