From e8db288e05e588ad3f416b3a24354d60d02f35f2 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Thu, 12 Apr 2012 02:45:22 -0400 Subject: ARM: multi-cluster PM: secondary kernel entry code CPUs in cluster based systems, such as big.LITTLE, have special needs when entering the kernel due to a hotplug event, or when resuming from a deep sleep mode. This is vectorized so multiple CPUs can enter the kernel in parallel without serialization. The mcpm prefix stands for "multi cluster power management", however this is usable on single cluster systems as well. Only the basic structure is introduced here. This will be extended with later patches. In order not to complexify things more than they currently have to, the planned work to make runtime adjusted MPIDR based indexing and dynamic memory allocation for cluster states is postponed to a later cycle. The MAX_NR_CLUSTERS and MAX_CPUS_PER_CLUSTER static definitions should be sufficient for those systems expected to be available in the near future. Signed-off-by: Nicolas Pitre Reviewed-by: Santosh Shilimkar Reviewed-by: Will Deacon --- arch/arm/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/arm/Kconfig') diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 2c3bdce1513..2d17275b5df 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1599,6 +1599,14 @@ config HAVE_ARM_TWD help This options enables support for the ARM timer and watchdog unit +config MCPM + bool "Multi-Cluster Power Management" + depends on CPU_V7 && SMP + help + This option provides the common power management infrastructure + for (multi-)cluster based systems, such as big.LITTLE based + systems. + choice prompt "Memory split" default VMSPLIT_3G -- cgit v1.2.3-70-g09d2