5c3a121d52
System topology on intel based system needs to be exported for non-numa case as well. All parts of asm-i386/topology.h has come under #ifdef CONFIG_NUMA after the merge to asm-x86/topology.h /sys/devices/system/cpu/cpu?/topology/* is populated based on ENABLE_TOPO_DEFINES The sysfs cpu topology is not being populated on my dual socket dual core xeon 5160 processor based (x86 32 bit) system. CONFIG_NUMA is not set in my case yet the topology is relevant and useful. irqbalance daemon application depends on topology to build the cpus and package list and it fails on Fedora9 beta since the sysfs topology was not being populated in the 2.6.25 kernel. I am not sure if it was intentional to not define ENABLE_TOPO_DEFINES for non-numa systems. This fix has been tested on the above mentioned dual core, dual socket system. Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@kernel.org
224 lines
5.4 KiB
C
224 lines
5.4 KiB
C
/*
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* Written by: Matthew Dobson, IBM Corporation
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*
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* Copyright (C) 2002, IBM Corp.
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <colpatch@us.ibm.com>
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*/
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#ifndef _ASM_X86_TOPOLOGY_H
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#define _ASM_X86_TOPOLOGY_H
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#ifdef CONFIG_X86_32
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# ifdef CONFIG_X86_HT
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# define ENABLE_TOPO_DEFINES
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# endif
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#else
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# ifdef CONFIG_SMP
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# define ENABLE_TOPO_DEFINES
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# endif
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#endif
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#ifdef CONFIG_NUMA
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#include <linux/cpumask.h>
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#include <asm/mpspec.h>
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/* Mappings between logical cpu number and node number */
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#ifdef CONFIG_X86_32
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extern int cpu_to_node_map[];
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#else
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/* Returns the number of the current Node. */
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#define numa_node_id() (early_cpu_to_node(raw_smp_processor_id()))
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#endif
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DECLARE_PER_CPU(int, x86_cpu_to_node_map);
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#ifdef CONFIG_SMP
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extern int x86_cpu_to_node_map_init[];
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extern void *x86_cpu_to_node_map_early_ptr;
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#else
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#define x86_cpu_to_node_map_early_ptr NULL
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#endif
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extern cpumask_t node_to_cpumask_map[];
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#define NUMA_NO_NODE (-1)
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/* Returns the number of the node containing CPU 'cpu' */
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#ifdef CONFIG_X86_32
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#define early_cpu_to_node(cpu) cpu_to_node(cpu)
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static inline int cpu_to_node(int cpu)
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{
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return cpu_to_node_map[cpu];
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}
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#else /* CONFIG_X86_64 */
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#ifdef CONFIG_SMP
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static inline int early_cpu_to_node(int cpu)
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{
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int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
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if (cpu_to_node_map)
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return cpu_to_node_map[cpu];
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else if (per_cpu_offset(cpu))
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return per_cpu(x86_cpu_to_node_map, cpu);
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else
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return NUMA_NO_NODE;
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}
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#else
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#define early_cpu_to_node(cpu) cpu_to_node(cpu)
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#endif
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static inline int cpu_to_node(int cpu)
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{
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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if (x86_cpu_to_node_map_early_ptr) {
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printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n",
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(int)cpu);
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dump_stack();
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return ((int *)x86_cpu_to_node_map_early_ptr)[cpu];
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}
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#endif
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return per_cpu(x86_cpu_to_node_map, cpu);
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}
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#ifdef CONFIG_NUMA
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/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
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#define node_to_cpumask_ptr(v, node) \
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cpumask_t *v = &(node_to_cpumask_map[node])
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#define node_to_cpumask_ptr_next(v, node) \
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v = &(node_to_cpumask_map[node])
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#endif
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#endif /* CONFIG_X86_64 */
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/*
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* Returns the number of the node containing Node 'node'. This
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* architecture is flat, so it is a pretty simple function!
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*/
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#define parent_node(node) (node)
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/* Returns a bitmask of CPUs on Node 'node'. */
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static inline cpumask_t node_to_cpumask(int node)
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{
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return node_to_cpumask_map[node];
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}
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/* Returns the number of the first CPU on Node 'node'. */
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static inline int node_to_first_cpu(int node)
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{
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cpumask_t mask = node_to_cpumask(node);
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return first_cpu(mask);
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}
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#define pcibus_to_node(bus) __pcibus_to_node(bus)
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#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
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#ifdef CONFIG_X86_32
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extern unsigned long node_start_pfn[];
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extern unsigned long node_end_pfn[];
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extern unsigned long node_remap_size[];
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#define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
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# define SD_CACHE_NICE_TRIES 1
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# define SD_IDLE_IDX 1
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# define SD_NEWIDLE_IDX 2
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# define SD_FORKEXEC_IDX 0
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#else
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# define SD_CACHE_NICE_TRIES 2
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# define SD_IDLE_IDX 2
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# define SD_NEWIDLE_IDX 2
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# define SD_FORKEXEC_IDX 1
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#endif
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/* sched_domains SD_NODE_INIT for NUMAQ machines */
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#define SD_NODE_INIT (struct sched_domain) { \
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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 = SD_CACHE_NICE_TRIES, \
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.busy_idx = 3, \
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.idle_idx = SD_IDLE_IDX, \
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.newidle_idx = SD_NEWIDLE_IDX, \
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.wake_idx = 1, \
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.forkexec_idx = SD_FORKEXEC_IDX, \
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.flags = SD_LOAD_BALANCE \
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| SD_BALANCE_EXEC \
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| SD_BALANCE_FORK \
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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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}
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#ifdef CONFIG_X86_64_ACPI_NUMA
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extern int __node_distance(int, int);
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#define node_distance(a, b) __node_distance(a, b)
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#endif
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#else /* CONFIG_NUMA */
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#endif
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#include <asm-generic/topology.h>
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extern cpumask_t cpu_coregroup_map(int cpu);
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#ifdef ENABLE_TOPO_DEFINES
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#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
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#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
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#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
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#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
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#endif
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static inline void arch_fix_phys_package_id(int num, u32 slot)
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{
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}
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struct pci_bus;
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void set_pci_bus_resources_arch_default(struct pci_bus *b);
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#ifdef CONFIG_SMP
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#define mc_capable() (boot_cpu_data.x86_max_cores > 1)
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#define smt_capable() (smp_num_siblings > 1)
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#endif
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#ifdef CONFIG_NUMA
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extern int get_mp_bus_to_node(int busnum);
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extern void set_mp_bus_to_node(int busnum, int node);
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#else
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static inline int get_mp_bus_to_node(int busnum)
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{
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return 0;
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}
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static inline void set_mp_bus_to_node(int busnum, int node)
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{
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}
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#endif
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#endif
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