forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Browse source
This commit is contained in:
Rusty Russell 2008-12-30 08:02:35 +10:30
commit 33edcf133b
2974 changed files with 145857 additions and 82592 deletions
Download patch file Download diff file Expand all files Collapse all files

46
arch/s390/kernel/topology.c
View file

@ -3,6 +3,9 @@
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#define KMSG_COMPONENT "cpu"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
@ -12,6 +15,7 @@
#include <linux/workqueue.h>
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/cpuset.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
#include <asm/sysinfo.h>
@ -57,11 +61,11 @@ struct core_info {
cpumask_t mask;
};
static int topology_enabled;
static void topology_work_fn(struct work_struct *work);
static struct tl_info *tl_info;
static struct core_info core_info;
static int machine_has_topology;
static int machine_has_topology_irq;
static struct timer_list topology_timer;
static void set_topology_timer(void);
static DECLARE_WORK(topology_work, topology_work_fn);
@ -77,8 +81,8 @@ cpumask_t cpu_coregroup_map(unsigned int cpu)
cpumask_t mask;
cpus_clear(mask);
if (!machine_has_topology)
return cpu_present_map;
if (!topology_enabled || !machine_has_topology)
return cpu_possible_map;
spin_lock_irqsave(&topology_lock, flags);
while (core) {
if (cpu_isset(cpu, core->mask)) {
@ -173,7 +177,7 @@ static void topology_update_polarization_simple(void)
int cpu;
mutex_lock(&smp_cpu_state_mutex);
for_each_present_cpu(cpu)
for_each_possible_cpu(cpu)
smp_cpu_polarization[cpu] = POLARIZATION_HRZ;
mutex_unlock(&smp_cpu_state_mutex);
}
@ -204,7 +208,7 @@ int topology_set_cpu_management(int fc)
rc = ptf(PTF_HORIZONTAL);
if (rc)
return -EBUSY;
for_each_present_cpu(cpu)
for_each_possible_cpu(cpu)
smp_cpu_polarization[cpu] = POLARIZATION_UNKNWN;
return rc;
}
@ -213,11 +217,11 @@ static void update_cpu_core_map(void)
{
int cpu;
for_each_present_cpu(cpu)
for_each_possible_cpu(cpu)
cpu_core_map[cpu] = cpu_coregroup_map(cpu);
}
void arch_update_cpu_topology(void)
int arch_update_cpu_topology(void)
{
struct tl_info *info = tl_info;
struct sys_device *sysdev;
@ -226,7 +230,7 @@ void arch_update_cpu_topology(void)
if (!machine_has_topology) {
update_cpu_core_map();
topology_update_polarization_simple();
return;
return 0;
}
stsi(info, 15, 1, 2);
tl_to_cores(info);
@ -235,11 +239,12 @@ void arch_update_cpu_topology(void)
sysdev = get_cpu_sysdev(cpu);
kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);
}
return 1;
}
static void topology_work_fn(struct work_struct *work)
{
arch_reinit_sched_domains();
rebuild_sched_domains();
}
void topology_schedule_update(void)
@ -262,10 +267,14 @@ static void set_topology_timer(void)
add_timer(&topology_timer);
}
static void topology_interrupt(__u16 code)
static int __init early_parse_topology(char *p)
{
schedule_work(&topology_work);
if (strncmp(p, "on", 2))
return 0;
topology_enabled = 1;
return 0;
}
early_param("topology", early_parse_topology);
static int __init init_topology_update(void)
{
@ -277,14 +286,7 @@ static int __init init_topology_update(void)
goto out;
}
init_timer_deferrable(&topology_timer);
if (machine_has_topology_irq) {
rc = register_external_interrupt(0x2005, topology_interrupt);
if (rc)
goto out;
ctl_set_bit(0, 8);
}
else
set_topology_timer();
set_topology_timer();
out:
update_cpu_core_map();
return rc;
@ -305,9 +307,6 @@ void __init s390_init_cpu_topology(void)
return;
machine_has_topology = 1;
if (facility_bits & (1ULL << 51))
machine_has_topology_irq = 1;
tl_info = alloc_bootmem_pages(PAGE_SIZE);
info = tl_info;
stsi(info, 15, 1, 2);
@ -316,7 +315,7 @@ void __init s390_init_cpu_topology(void)
for (i = 0; i < info->mnest - 2; i++)
nr_cores *= info->mag[NR_MAG - 3 - i];
printk(KERN_INFO "CPU topology:");
pr_info("The CPU configuration topology of the machine is:");
for (i = 0; i < NR_MAG; i++)
printk(" %d", info->mag[i]);
printk(" / %d\n", info->mnest);
@ -331,5 +330,4 @@ void __init s390_init_cpu_topology(void)
return;
error:
machine_has_topology = 0;
machine_has_topology_irq = 0;
}