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s390/smp,topology: add polarization member to pcpu struct

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The cpu polarization member is the only per cpu state that is not part
of the pcpu structure. So add it there and have everything in one place.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2012-09-04 17:36:16 +02:00 committed by Martin Schwidefsky
parent fade4dc491
commit 50ab9a9a60
4 changed files with 25 additions and 29 deletions
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2
arch/s390/include/asm/smp.h
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@ -30,6 +30,8 @@ extern int smp_vcpu_scheduled(int cpu);
extern void smp_yield_cpu(int cpu);
extern void smp_yield(void);
extern void smp_stop_cpu(void);
extern void smp_cpu_set_polarization(int cpu, int val);
extern int smp_cpu_get_polarization(int cpu);
#else /* CONFIG_SMP */

18
arch/s390/include/asm/topology.h
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@ -51,24 +51,6 @@ static inline void topology_expect_change(void) { }
#define POLARIZATION_VM (2)
#define POLARIZATION_VH (3)
extern int cpu_polarization[];
static inline void cpu_set_polarization(int cpu, int val)
{
#ifdef CONFIG_SCHED_BOOK
cpu_polarization[cpu] = val;
#endif
}
static inline int cpu_read_polarization(int cpu)
{
#ifdef CONFIG_SCHED_BOOK
return cpu_polarization[cpu];
#else
return POLARIZATION_HRZ;
#endif
}
#ifdef CONFIG_SCHED_BOOK
void s390_init_cpu_topology(void);
#else

23
arch/s390/kernel/smp.c
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@ -66,6 +66,7 @@ struct pcpu {
unsigned long panic_stack; /* panic stack for the cpu */
unsigned long ec_mask; /* bit mask for ec_xxx functions */
int state; /* physical cpu state */
int polarization; /* physical polarization */
u16 address; /* physical cpu address */
};
@ -73,6 +74,10 @@ static u8 boot_cpu_type;
static u16 boot_cpu_address;
static struct pcpu pcpu_devices[NR_CPUS];
/*
* The smp_cpu_state_mutex must be held when changing the state or polarization
* member of a pcpu data structure within the pcpu_devices arreay.
*/
DEFINE_MUTEX(smp_cpu_state_mutex);
/*
@ -587,6 +592,16 @@ static inline void smp_get_save_area(int cpu, u16 address) { }
#endif /* CONFIG_ZFCPDUMP || CONFIG_CRASH_DUMP */
void smp_cpu_set_polarization(int cpu, int val)
{
pcpu_devices[cpu].polarization = val;
}
int smp_cpu_get_polarization(int cpu)
{
return pcpu_devices[cpu].polarization;
}
static struct sclp_cpu_info *smp_get_cpu_info(void)
{
static int use_sigp_detection;
@ -629,7 +644,7 @@ static int __devinit __smp_rescan_cpus(struct sclp_cpu_info *info,
pcpu->address = info->cpu[i].address;
pcpu->state = (cpu >= info->configured) ?
CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
set_cpu_present(cpu, true);
if (sysfs_add && smp_add_present_cpu(cpu) != 0)
set_cpu_present(cpu, false);
@ -797,7 +812,7 @@ void __init smp_prepare_boot_cpu(void)
pcpu->async_stack = S390_lowcore.async_stack - ASYNC_SIZE;
pcpu->panic_stack = S390_lowcore.panic_stack - PAGE_SIZE;
S390_lowcore.percpu_offset = __per_cpu_offset[0];
cpu_set_polarization(0, POLARIZATION_UNKNOWN);
smp_cpu_set_polarization(0, POLARIZATION_UNKNOWN);
set_cpu_present(0, true);
set_cpu_online(0, true);
}
@ -863,7 +878,7 @@ static ssize_t cpu_configure_store(struct device *dev,
if (rc)
break;
pcpu->state = CPU_STATE_STANDBY;
cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
topology_expect_change();
break;
case 1:
@ -873,7 +888,7 @@ static ssize_t cpu_configure_store(struct device *dev,
if (rc)
break;
pcpu->state = CPU_STATE_CONFIGURED;
cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
topology_expect_change();
break;
default:

11
arch/s390/kernel/topology.c
View File

@ -45,9 +45,6 @@ static struct mask_info book_info;
cpumask_t cpu_book_map[NR_CPUS];
unsigned char cpu_book_id[NR_CPUS];
/* smp_cpu_state_mutex must be held when accessing this array */
int cpu_polarization[NR_CPUS];
static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
{
cpumask_t mask;
@ -95,7 +92,7 @@ static struct mask_info *add_cpus_to_mask(struct topology_cpu *tl_cpu,
} else {
cpu_core_id[lcpu] = core->id;
}
cpu_set_polarization(lcpu, tl_cpu->pp);
smp_cpu_set_polarization(lcpu, tl_cpu->pp);
}
}
return core;
@ -202,7 +199,7 @@ static void topology_update_polarization_simple(void)
mutex_lock(&smp_cpu_state_mutex);
for_each_possible_cpu(cpu)
cpu_set_polarization(cpu, POLARIZATION_HRZ);
smp_cpu_set_polarization(cpu, POLARIZATION_HRZ);
mutex_unlock(&smp_cpu_state_mutex);
}
@ -232,7 +229,7 @@ int topology_set_cpu_management(int fc)
if (rc)
return -EBUSY;
for_each_possible_cpu(cpu)
cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
return rc;
}
@ -414,7 +411,7 @@ static ssize_t cpu_polarization_show(struct device *dev,
ssize_t count;
mutex_lock(&smp_cpu_state_mutex);
switch (cpu_read_polarization(cpu)) {
switch (smp_cpu_get_polarization(cpu)) {
case POLARIZATION_HRZ:
count = sprintf(buf, "horizontal\n");
break;