diff options
Diffstat (limited to 'arch/s390/kernel/topology.c')
-rw-r--r-- | arch/s390/kernel/topology.c | 72 |
1 files changed, 57 insertions, 15 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 369dc1c..12b39b3 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -1,6 +1,4 @@ /* - * arch/s390/kernel/topology.c - * * Copyright IBM Corp. 2007 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> */ @@ -19,9 +17,17 @@ #include <asm/sysinfo.h> #define CPU_BITS 64 +#define NR_MAG 6 + +#define PTF_HORIZONTAL (0UL) +#define PTF_VERTICAL (1UL) +#define PTF_CHECK (2UL) struct tl_cpu { - unsigned char reserved[6]; + unsigned char reserved0[4]; + unsigned char :6; + unsigned char pp:2; + unsigned char reserved1; unsigned short origin; unsigned long mask[CPU_BITS / BITS_PER_LONG]; }; @@ -36,8 +42,6 @@ union tl_entry { struct tl_container container; }; -#define NR_MAG 6 - struct tl_info { unsigned char reserved0[2]; unsigned short length; @@ -96,8 +100,10 @@ static void add_cpus_to_core(struct tl_cpu *tl_cpu, struct core_info *core) rcpu = CPU_BITS - 1 - cpu + tl_cpu->origin; for_each_present_cpu(lcpu) { - if (__cpu_logical_map[lcpu] == rcpu) + if (__cpu_logical_map[lcpu] == rcpu) { cpu_set(lcpu, core->mask); + smp_cpu_polarization[lcpu] = tl_cpu->pp; + } } } } @@ -127,7 +133,7 @@ static void tl_to_cores(struct tl_info *info) mutex_lock(&smp_cpu_state_mutex); clear_cores(); - tle = (union tl_entry *)&info->tle; + tle = info->tle; end = (union tl_entry *)((unsigned long)info + info->length); while (tle < end) { switch (tle->nl) { @@ -152,7 +158,17 @@ static void tl_to_cores(struct tl_info *info) mutex_unlock(&smp_cpu_state_mutex); } -static int ptf(void) +static void topology_update_polarization_simple(void) +{ + int cpu; + + mutex_lock(&smp_cpu_state_mutex); + for_each_present_cpu(cpu) + smp_cpu_polarization[cpu] = POLARIZATION_HRZ; + mutex_unlock(&smp_cpu_state_mutex); +} + +static int ptf(unsigned long fc) { int rc; @@ -161,7 +177,25 @@ static int ptf(void) " ipm %0\n" " srl %0,28\n" : "=d" (rc) - : "d" (2UL) : "cc"); + : "d" (fc) : "cc"); + return rc; +} + +int topology_set_cpu_management(int fc) +{ + int cpu; + int rc; + + if (!machine_has_topology) + return -EOPNOTSUPP; + if (fc) + rc = ptf(PTF_VERTICAL); + else + rc = ptf(PTF_HORIZONTAL); + if (rc) + return -EBUSY; + for_each_present_cpu(cpu) + smp_cpu_polarization[cpu] = POLARIZATION_UNKNWN; return rc; } @@ -171,9 +205,10 @@ void arch_update_cpu_topology(void) struct sys_device *sysdev; int cpu; - if (!machine_has_topology) + if (!machine_has_topology) { + topology_update_polarization_simple(); return; - ptf(); + } stsi(info, 15, 1, 2); tl_to_cores(info); for_each_online_cpu(cpu) { @@ -187,10 +222,15 @@ static void topology_work_fn(struct work_struct *work) arch_reinit_sched_domains(); } +void topology_schedule_update(void) +{ + schedule_work(&topology_work); +} + static void topology_timer_fn(unsigned long ignored) { - if (ptf()) - schedule_work(&topology_work); + if (ptf(PTF_CHECK)) + topology_schedule_update(); set_topology_timer(); } @@ -211,9 +251,11 @@ static int __init init_topology_update(void) { int rc; - if (!machine_has_topology) + if (!machine_has_topology) { + topology_update_polarization_simple(); return 0; - init_timer(&topology_timer); + } + init_timer_deferrable(&topology_timer); if (machine_has_topology_irq) { rc = register_external_interrupt(0x2005, topology_interrupt); if (rc) |