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[v4,06/14] ARM: mcpm: support 4 clusters

Message ID 1398668032-8335-7-git-send-email-haojian.zhuang@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Haojian Zhuang April 28, 2014, 6:53 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>
---
 arch/arm/Kconfig            | 6 ++++++
 arch/arm/include/asm/mcpm.h | 5 +++++
 2 files changed, 11 insertions(+)

Comments

Dave Martin April 29, 2014, 10:21 a.m. UTC | #1
On Mon, Apr 28, 2014 at 02:53:44PM +0800, Haojian Zhuang wrote:
> Add the CONFIG_MCPM_QUAD_CLUSTER configuration to enlarge cluster number
> from 2 to 4.
> 
> Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
> ---
>  arch/arm/Kconfig            | 6 ++++++
>  arch/arm/include/asm/mcpm.h | 5 +++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 5ef96ea..58e995d 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1572,6 +1572,12 @@ config MCPM
>  	  for (multi-)cluster based systems, such as big.LITTLE based
>  	  systems.
>  
> +config MCPM_QUAD_CLUSTER
> +	bool "Enable Quad clusters in MCPM"
> +	depends on MCPM
> +	help
> +	  This option enables quad clusters in MCPM.

This is fairly self-explanatory, but to make things crystal clear
you could add an explanatory note about how this option should be used,
something like:

	  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.

Cheers
---Dave
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Patch

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5ef96ea..58e995d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1572,6 +1572,12 @@  config MCPM
 	  for (multi-)cluster based systems, such as big.LITTLE based
 	  systems.
 
+config MCPM_QUAD_CLUSTER
+	bool "Enable Quad clusters in MCPM"
+	depends on MCPM
+	help
+	  This option enables quad clusters in MCPM.
+
 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 608516e..fc8d70d 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__