mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-15 08:44:14 +08:00
topology, s390: Add z11 cpu topology support
Use the extended cpu topology information that z11 machines provide to improve the scheduler's decision making. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100831082844.604956770@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Heiko Carstens
Ingo Molnar
parent
b40d8ed4e4
commit
4cb14bc8c5
@ -198,6 +198,13 @@ config HOTPLUG_CPU
|
||||
can be controlled through /sys/devices/system/cpu/cpu#.
|
||||
Say N if you want to disable CPU hotplug.
|
||||
|
||||
config SCHED_BOOK
|
||||
bool "Book scheduler support"
|
||||
depends on SMP
|
||||
help
|
||||
Book scheduler support improves the CPU scheduler's decision making
|
||||
when dealing with machines that have several books.
|
||||
|
||||
config MATHEMU
|
||||
bool "IEEE FPU emulation"
|
||||
depends on MARCH_G5
|
||||
|
||||
@ -3,15 +3,32 @@
|
||||
|
||||
#include <linux/cpumask.h>
|
||||
|
||||
#define mc_capable() (1)
|
||||
|
||||
const struct cpumask *cpu_coregroup_mask(unsigned int cpu);
|
||||
|
||||
extern unsigned char cpu_core_id[NR_CPUS];
|
||||
extern cpumask_t cpu_core_map[NR_CPUS];
|
||||
|
||||
static inline const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
|
||||
{
|
||||
return &cpu_core_map[cpu];
|
||||
}
|
||||
|
||||
#define topology_core_id(cpu) (cpu_core_id[cpu])
|
||||
#define topology_core_cpumask(cpu) (&cpu_core_map[cpu])
|
||||
#define mc_capable() (1)
|
||||
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
|
||||
extern unsigned char cpu_book_id[NR_CPUS];
|
||||
extern cpumask_t cpu_book_map[NR_CPUS];
|
||||
|
||||
static inline const struct cpumask *cpu_book_mask(unsigned int cpu)
|
||||
{
|
||||
return &cpu_book_map[cpu];
|
||||
}
|
||||
|
||||
#define topology_book_id(cpu) (cpu_book_id[cpu])
|
||||
#define topology_book_cpumask(cpu) (&cpu_book_map[cpu])
|
||||
|
||||
#endif /* CONFIG_SCHED_BOOK */
|
||||
|
||||
int topology_set_cpu_management(int fc);
|
||||
void topology_schedule_update(void);
|
||||
@ -30,6 +47,8 @@ static inline void s390_init_cpu_topology(void)
|
||||
};
|
||||
#endif
|
||||
|
||||
#define SD_BOOK_INIT SD_CPU_INIT
|
||||
|
||||
#include <asm-generic/topology.h>
|
||||
|
||||
#endif /* _ASM_S390_TOPOLOGY_H */
|
||||
|
||||
@ -57,8 +57,8 @@ struct tl_info {
|
||||
union tl_entry tle[0];
|
||||
};
|
||||
|
||||
struct core_info {
|
||||
struct core_info *next;
|
||||
struct mask_info {
|
||||
struct mask_info *next;
|
||||
unsigned char id;
|
||||
cpumask_t mask;
|
||||
};
|
||||
@ -66,7 +66,6 @@ struct core_info {
|
||||
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 struct timer_list topology_timer;
|
||||
static void set_topology_timer(void);
|
||||
@ -74,38 +73,37 @@ static DECLARE_WORK(topology_work, topology_work_fn);
|
||||
/* topology_lock protects the core linked list */
|
||||
static DEFINE_SPINLOCK(topology_lock);
|
||||
|
||||
static struct mask_info core_info;
|
||||
cpumask_t cpu_core_map[NR_CPUS];
|
||||
unsigned char cpu_core_id[NR_CPUS];
|
||||
|
||||
static cpumask_t cpu_coregroup_map(unsigned int cpu)
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
static struct mask_info book_info;
|
||||
cpumask_t cpu_book_map[NR_CPUS];
|
||||
unsigned char cpu_book_id[NR_CPUS];
|
||||
#endif
|
||||
|
||||
static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
|
||||
{
|
||||
struct core_info *core = &core_info;
|
||||
unsigned long flags;
|
||||
cpumask_t mask;
|
||||
|
||||
cpus_clear(mask);
|
||||
if (!topology_enabled || !machine_has_topology)
|
||||
return cpu_possible_map;
|
||||
spin_lock_irqsave(&topology_lock, flags);
|
||||
while (core) {
|
||||
if (cpu_isset(cpu, core->mask)) {
|
||||
mask = core->mask;
|
||||
while (info) {
|
||||
if (cpu_isset(cpu, info->mask)) {
|
||||
mask = info->mask;
|
||||
break;
|
||||
}
|
||||
core = core->next;
|
||||
info = info->next;
|
||||
}
|
||||
spin_unlock_irqrestore(&topology_lock, flags);
|
||||
if (cpus_empty(mask))
|
||||
mask = cpumask_of_cpu(cpu);
|
||||
return mask;
|
||||
}
|
||||
|
||||
const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
|
||||
{
|
||||
return &cpu_core_map[cpu];
|
||||
}
|
||||
|
||||
static void add_cpus_to_core(struct tl_cpu *tl_cpu, struct core_info *core)
|
||||
static void add_cpus_to_mask(struct tl_cpu *tl_cpu, struct mask_info *book,
|
||||
struct mask_info *core)
|
||||
{
|
||||
unsigned int cpu;
|
||||
|
||||
@ -117,23 +115,35 @@ 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) {
|
||||
cpu_set(lcpu, core->mask);
|
||||
cpu_core_id[lcpu] = core->id;
|
||||
smp_cpu_polarization[lcpu] = tl_cpu->pp;
|
||||
}
|
||||
if (cpu_logical_map(lcpu) != rcpu)
|
||||
continue;
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
cpu_set(lcpu, book->mask);
|
||||
cpu_book_id[lcpu] = book->id;
|
||||
#endif
|
||||
cpu_set(lcpu, core->mask);
|
||||
cpu_core_id[lcpu] = core->id;
|
||||
smp_cpu_polarization[lcpu] = tl_cpu->pp;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void clear_cores(void)
|
||||
static void clear_masks(void)
|
||||
{
|
||||
struct core_info *core = &core_info;
|
||||
struct mask_info *info;
|
||||
|
||||
while (core) {
|
||||
cpus_clear(core->mask);
|
||||
core = core->next;
|
||||
info = &core_info;
|
||||
while (info) {
|
||||
cpus_clear(info->mask);
|
||||
info = info->next;
|
||||
}
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
info = &book_info;
|
||||
while (info) {
|
||||
cpus_clear(info->mask);
|
||||
info = info->next;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static union tl_entry *next_tle(union tl_entry *tle)
|
||||
@ -146,29 +156,36 @@ static union tl_entry *next_tle(union tl_entry *tle)
|
||||
|
||||
static void tl_to_cores(struct tl_info *info)
|
||||
{
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
struct mask_info *book = &book_info;
|
||||
#else
|
||||
struct mask_info *book = NULL;
|
||||
#endif
|
||||
struct mask_info *core = &core_info;
|
||||
union tl_entry *tle, *end;
|
||||
struct core_info *core = &core_info;
|
||||
|
||||
|
||||
spin_lock_irq(&topology_lock);
|
||||
clear_cores();
|
||||
clear_masks();
|
||||
tle = info->tle;
|
||||
end = (union tl_entry *)((unsigned long)info + info->length);
|
||||
while (tle < end) {
|
||||
switch (tle->nl) {
|
||||
case 5:
|
||||
case 4:
|
||||
case 3:
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
case 2:
|
||||
book = book->next;
|
||||
book->id = tle->container.id;
|
||||
break;
|
||||
#endif
|
||||
case 1:
|
||||
core = core->next;
|
||||
core->id = tle->container.id;
|
||||
break;
|
||||
case 0:
|
||||
add_cpus_to_core(&tle->cpu, core);
|
||||
add_cpus_to_mask(&tle->cpu, book, core);
|
||||
break;
|
||||
default:
|
||||
clear_cores();
|
||||
clear_masks();
|
||||
machine_has_topology = 0;
|
||||
goto out;
|
||||
}
|
||||
@ -221,10 +238,29 @@ int topology_set_cpu_management(int fc)
|
||||
|
||||
static void update_cpu_core_map(void)
|
||||
{
|
||||
unsigned long flags;
|
||||
int cpu;
|
||||
|
||||
for_each_possible_cpu(cpu)
|
||||
cpu_core_map[cpu] = cpu_coregroup_map(cpu);
|
||||
spin_lock_irqsave(&topology_lock, flags);
|
||||
for_each_possible_cpu(cpu) {
|
||||
cpu_core_map[cpu] = cpu_group_map(&core_info, cpu);
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
cpu_book_map[cpu] = cpu_group_map(&book_info, cpu);
|
||||
#endif
|
||||
}
|
||||
spin_unlock_irqrestore(&topology_lock, flags);
|
||||
}
|
||||
|
||||
static void store_topology(struct tl_info *info)
|
||||
{
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
int rc;
|
||||
|
||||
rc = stsi(info, 15, 1, 3);
|
||||
if (rc != -ENOSYS)
|
||||
return;
|
||||
#endif
|
||||
stsi(info, 15, 1, 2);
|
||||
}
|
||||
|
||||
int arch_update_cpu_topology(void)
|
||||
@ -238,7 +274,7 @@ int arch_update_cpu_topology(void)
|
||||
topology_update_polarization_simple();
|
||||
return 0;
|
||||
}
|
||||
stsi(info, 15, 1, 2);
|
||||
store_topology(info);
|
||||
tl_to_cores(info);
|
||||
update_cpu_core_map();
|
||||
for_each_online_cpu(cpu) {
|
||||
@ -299,12 +335,24 @@ out:
|
||||
}
|
||||
__initcall(init_topology_update);
|
||||
|
||||
static void alloc_masks(struct tl_info *info, struct mask_info *mask, int offset)
|
||||
{
|
||||
int i, nr_masks;
|
||||
|
||||
nr_masks = info->mag[NR_MAG - offset];
|
||||
for (i = 0; i < info->mnest - offset; i++)
|
||||
nr_masks *= info->mag[NR_MAG - offset - 1 - i];
|
||||
nr_masks = max(nr_masks, 1);
|
||||
for (i = 0; i < nr_masks; i++) {
|
||||
mask->next = alloc_bootmem(sizeof(struct mask_info));
|
||||
mask = mask->next;
|
||||
}
|
||||
}
|
||||
|
||||
void __init s390_init_cpu_topology(void)
|
||||
{
|
||||
unsigned long long facility_bits;
|
||||
struct tl_info *info;
|
||||
struct core_info *core;
|
||||
int nr_cores;
|
||||
int i;
|
||||
|
||||
if (stfle(&facility_bits, 1) <= 0)
|
||||
@ -315,25 +363,13 @@ void __init s390_init_cpu_topology(void)
|
||||
|
||||
tl_info = alloc_bootmem_pages(PAGE_SIZE);
|
||||
info = tl_info;
|
||||
stsi(info, 15, 1, 2);
|
||||
|
||||
nr_cores = info->mag[NR_MAG - 2];
|
||||
for (i = 0; i < info->mnest - 2; i++)
|
||||
nr_cores *= info->mag[NR_MAG - 3 - i];
|
||||
|
||||
store_topology(info);
|
||||
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);
|
||||
|
||||
core = &core_info;
|
||||
for (i = 0; i < nr_cores; i++) {
|
||||
core->next = alloc_bootmem(sizeof(struct core_info));
|
||||
core = core->next;
|
||||
if (!core)
|
||||
goto error;
|
||||
}
|
||||
return;
|
||||
error:
|
||||
machine_has_topology = 0;
|
||||
alloc_masks(info, &core_info, 2);
|
||||
#ifdef CONFIG_SCHED_BOOK
|
||||
alloc_masks(info, &book_info, 3);
|
||||
#endif
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user