Commit-ID: fb2aa85564f4de35d25db022ab93640f8bb51821 Gitweb: http://git.kernel.org/tip/fb2aa85564f4de35d25db022ab93640f8bb51821 Author: Vincent Guittot <[email protected]> AuthorDate: Fri, 11 Apr 2014 11:44:41 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Wed, 7 May 2014 13:33:52 +0200
sched, ARM: Create a dedicated scheduler topology table Create a dedicated topology table for ARM which will create new level to differentiate CPUs that can or not powergate independantly from others. The patch gives an example of how to add domain that will take advantage of SD_SHARE_POWERDOMAIN. Signed-off-by: Vincent Guittot <[email protected]> Reviewed-by: Dietmar Eggemann <[email protected]> Tested-by: Dietmar Eggemann <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Grant Likely <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Mark Brown <[email protected]> Cc: Nicolas Pitre <[email protected]> Cc: Rob Herring <[email protected]> Cc: Russell King <[email protected]> Cc: Sudeep KarkadaNagesha <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/arm/kernel/topology.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index 0bc94b1..71e1fec 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -185,6 +185,15 @@ const struct cpumask *cpu_coregroup_mask(int cpu) return &cpu_topology[cpu].core_sibling; } +/* + * The current assumption is that we can power gate each core independently. + * This will be superseded by DT binding once available. + */ +const struct cpumask *cpu_corepower_mask(int cpu) +{ + return &cpu_topology[cpu].thread_sibling; +} + static void update_siblings_masks(unsigned int cpuid) { struct cputopo_arm *cpu_topo, *cpuid_topo = &cpu_topology[cpuid]; @@ -266,6 +275,20 @@ void store_cpu_topology(unsigned int cpuid) cpu_topology[cpuid].socket_id, mpidr); } +static inline const int cpu_corepower_flags(void) +{ + return SD_SHARE_PKG_RESOURCES | SD_SHARE_POWERDOMAIN; +} + +static struct sched_domain_topology_level arm_topology[] = { +#ifdef CONFIG_SCHED_MC + { cpu_corepower_mask, cpu_corepower_flags, SD_INIT_NAME(GMC) }, + { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) }, +#endif + { cpu_cpu_mask, SD_INIT_NAME(DIE) }, + { NULL, }, +}; + /* * init_cpu_topology is called at boot when only one cpu is running * which prevent simultaneous write access to cpu_topology array @@ -289,4 +312,7 @@ void __init init_cpu_topology(void) smp_wmb(); parse_dt_topology(); + + /* Set scheduler topology descriptor */ + set_sched_topology(arm_topology); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
