diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/include/asm/topology.h | 8 | ||||
| -rw-r--r-- | arch/sh/kernel/topology.c | 26 | ||||
| -rw-r--r-- | arch/sh/mm/Kconfig | 9 |
3 files changed, 43 insertions, 0 deletions
diff --git a/arch/sh/include/asm/topology.h b/arch/sh/include/asm/topology.h index 65e7bd2f2240..37cdadd975ac 100644 --- a/arch/sh/include/asm/topology.h +++ b/arch/sh/include/asm/topology.h @@ -40,6 +40,14 @@ #endif +#define mc_capable() (1) + +const struct cpumask *cpu_coregroup_mask(unsigned int cpu); + +extern cpumask_t cpu_core_map[NR_CPUS]; + +#define topology_core_cpumask(cpu) (&cpu_core_map[cpu]) + #include <asm-generic/topology.h> #endif /* _ASM_SH_TOPOLOGY_H */ diff --git a/arch/sh/kernel/topology.c b/arch/sh/kernel/topology.c index 0838942b7083..9b0b633b6c92 100644 --- a/arch/sh/kernel/topology.c +++ b/arch/sh/kernel/topology.c @@ -16,6 +16,32 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices); +cpumask_t cpu_core_map[NR_CPUS]; + +static cpumask_t cpu_coregroup_map(unsigned int cpu) +{ + /* + * Presently all SH-X3 SMP cores are multi-cores, so just keep it + * simple until we have a method for determining topology.. + */ + return cpu_possible_map; +} + +const struct cpumask *cpu_coregroup_mask(unsigned int cpu) +{ + return &cpu_core_map[cpu]; +} + +int arch_update_cpu_topology(void) +{ + unsigned int cpu; + + for_each_possible_cpu(cpu) + cpu_core_map[cpu] = cpu_coregroup_map(cpu); + + return 0; +} + static int __init topology_init(void) { int i, ret; diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index b8a9032c74be..ca02b72bf46f 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -256,6 +256,15 @@ endchoice source "mm/Kconfig" +config SCHED_MC + bool "Multi-core scheduler support" + depends on SMP + default y + help + Multi-core scheduler support improves the CPU scheduler's decision + making when dealing with multi-core CPU chips at a cost of slightly + increased overhead in some places. If unsure say N here. + endmenu menu "Cache configuration" |