d5a7430ddc
Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu variable. This saves sizeof(cpumask_t) * NR unused cpus. Access is mostly from startup and CPU HOTPLUG functions. Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
117 lines
2.3 KiB
C
117 lines
2.3 KiB
C
#ifndef _ASM_POWERPC_TOPOLOGY_H
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#define _ASM_POWERPC_TOPOLOGY_H
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#ifdef __KERNEL__
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struct sys_device;
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struct device_node;
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#ifdef CONFIG_NUMA
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#include <asm/mmzone.h>
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static inline int cpu_to_node(int cpu)
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{
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return numa_cpu_lookup_table[cpu];
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}
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#define parent_node(node) (node)
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static inline cpumask_t node_to_cpumask(int node)
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{
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return numa_cpumask_lookup_table[node];
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}
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static inline int node_to_first_cpu(int node)
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{
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cpumask_t tmp;
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tmp = node_to_cpumask(node);
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return first_cpu(tmp);
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}
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int of_node_to_nid(struct device_node *device);
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struct pci_bus;
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#ifdef CONFIG_PCI
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extern int pcibus_to_node(struct pci_bus *bus);
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#else
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static inline int pcibus_to_node(struct pci_bus *bus)
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{
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return -1;
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}
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#endif
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#define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ? \
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CPU_MASK_ALL : \
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node_to_cpumask(pcibus_to_node(bus)) \
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)
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/* sched_domains SD_NODE_INIT for PPC64 machines */
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#define SD_NODE_INIT (struct sched_domain) { \
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.span = CPU_MASK_NONE, \
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.parent = NULL, \
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.child = NULL, \
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.groups = NULL, \
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.min_interval = 8, \
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.max_interval = 32, \
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.busy_factor = 32, \
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.imbalance_pct = 125, \
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.cache_nice_tries = 1, \
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.busy_idx = 3, \
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.idle_idx = 1, \
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.newidle_idx = 2, \
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.wake_idx = 1, \
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.flags = SD_LOAD_BALANCE \
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| SD_BALANCE_EXEC \
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| SD_BALANCE_NEWIDLE \
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| SD_WAKE_IDLE \
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| SD_SERIALIZE \
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| SD_WAKE_BALANCE, \
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.last_balance = jiffies, \
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.balance_interval = 1, \
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.nr_balance_failed = 0, \
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}
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extern void __init dump_numa_cpu_topology(void);
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extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
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extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
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#else
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static inline int of_node_to_nid(struct device_node *device)
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{
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return 0;
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}
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static inline void dump_numa_cpu_topology(void) {}
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static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
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{
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return 0;
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}
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static inline void sysfs_remove_device_from_node(struct sys_device *dev,
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int nid)
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{
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}
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#include <asm-generic/topology.h>
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#endif /* CONFIG_NUMA */
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#ifdef CONFIG_SMP
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#include <asm/cputable.h>
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#define smt_capable() (cpu_has_feature(CPU_FTR_SMT))
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#ifdef CONFIG_PPC64
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#include <asm/smp.h>
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#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
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#endif
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#endif
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_TOPOLOGY_H */
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