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Diffstat (limited to 'arch/s390/kernel/topology.c')
-rw-r--r--arch/s390/kernel/topology.c89
1 files changed, 31 insertions, 58 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 64298a867589..e959c02e0cac 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -46,6 +46,7 @@ static DECLARE_WORK(topology_work, topology_work_fn);
*/
static struct mask_info socket_info;
static struct mask_info book_info;
+static struct mask_info drawer_info;
DEFINE_PER_CPU(struct cpu_topology_s390, cpu_topology);
EXPORT_PER_CPU_SYMBOL_GPL(cpu_topology);
@@ -79,10 +80,10 @@ static cpumask_t cpu_thread_map(unsigned int cpu)
return mask;
}
-static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
- struct mask_info *book,
- struct mask_info *socket,
- int one_socket_per_cpu)
+static void add_cpus_to_mask(struct topology_core *tl_core,
+ struct mask_info *drawer,
+ struct mask_info *book,
+ struct mask_info *socket)
{
struct cpu_topology_s390 *topo;
unsigned int core;
@@ -97,21 +98,17 @@ static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
continue;
for (i = 0; i <= smp_cpu_mtid; i++) {
topo = &per_cpu(cpu_topology, lcpu + i);
+ topo->drawer_id = drawer->id;
topo->book_id = book->id;
+ topo->socket_id = socket->id;
topo->core_id = rcore;
topo->thread_id = lcpu + i;
+ cpumask_set_cpu(lcpu + i, &drawer->mask);
cpumask_set_cpu(lcpu + i, &book->mask);
cpumask_set_cpu(lcpu + i, &socket->mask);
- if (one_socket_per_cpu)
- topo->socket_id = rcore;
- else
- topo->socket_id = socket->id;
smp_cpu_set_polarization(lcpu + i, tl_core->pp);
}
- if (one_socket_per_cpu)
- socket = socket->next;
}
- return socket;
}
static void clear_masks(void)
@@ -128,6 +125,11 @@ static void clear_masks(void)
cpumask_clear(&info->mask);
info = info->next;
}
+ info = &drawer_info;
+ while (info) {
+ cpumask_clear(&info->mask);
+ info = info->next;
+ }
}
static union topology_entry *next_tle(union topology_entry *tle)
@@ -137,16 +139,22 @@ static union topology_entry *next_tle(union topology_entry *tle)
return (union topology_entry *)((struct topology_container *)tle + 1);
}
-static void __tl_to_masks_generic(struct sysinfo_15_1_x *info)
+static void tl_to_masks(struct sysinfo_15_1_x *info)
{
struct mask_info *socket = &socket_info;
struct mask_info *book = &book_info;
+ struct mask_info *drawer = &drawer_info;
union topology_entry *tle, *end;
+ clear_masks();
tle = info->tle;
end = (union topology_entry *)((unsigned long)info + info->length);
while (tle < end) {
switch (tle->nl) {
+ case 3:
+ drawer = drawer->next;
+ drawer->id = tle->container.id;
+ break;
case 2:
book = book->next;
book->id = tle->container.id;
@@ -156,32 +164,7 @@ static void __tl_to_masks_generic(struct sysinfo_15_1_x *info)
socket->id = tle->container.id;
break;
case 0:
- add_cpus_to_mask(&tle->cpu, book, socket, 0);
- break;
- default:
- clear_masks();
- return;
- }
- tle = next_tle(tle);
- }
-}
-
-static void __tl_to_masks_z10(struct sysinfo_15_1_x *info)
-{
- struct mask_info *socket = &socket_info;
- struct mask_info *book = &book_info;
- union topology_entry *tle, *end;
-
- tle = info->tle;
- end = (union topology_entry *)((unsigned long)info + info->length);
- while (tle < end) {
- switch (tle->nl) {
- case 1:
- book = book->next;
- book->id = tle->container.id;
- break;
- case 0:
- socket = add_cpus_to_mask(&tle->cpu, book, socket, 1);
+ add_cpus_to_mask(&tle->cpu, drawer, book, socket);
break;
default:
clear_masks();
@@ -191,22 +174,6 @@ static void __tl_to_masks_z10(struct sysinfo_15_1_x *info)
}
}
-static void tl_to_masks(struct sysinfo_15_1_x *info)
-{
- struct cpuid cpu_id;
-
- get_cpu_id(&cpu_id);
- clear_masks();
- switch (cpu_id.machine) {
- case 0x2097:
- case 0x2098:
- __tl_to_masks_z10(info);
- break;
- default:
- __tl_to_masks_generic(info);
- }
-}
-
static void topology_update_polarization_simple(void)
{
int cpu;
@@ -257,11 +224,13 @@ static void update_cpu_masks(void)
topo->thread_mask = cpu_thread_map(cpu);
topo->core_mask = cpu_group_map(&socket_info, cpu);
topo->book_mask = cpu_group_map(&book_info, cpu);
+ topo->drawer_mask = cpu_group_map(&drawer_info, cpu);
if (!MACHINE_HAS_TOPOLOGY) {
topo->thread_id = cpu;
topo->core_id = cpu;
topo->socket_id = cpu;
topo->book_id = cpu;
+ topo->drawer_id = cpu;
}
}
numa_update_cpu_topology();
@@ -269,10 +238,7 @@ static void update_cpu_masks(void)
void store_topology(struct sysinfo_15_1_x *info)
{
- if (topology_max_mnest >= 3)
- stsi(info, 15, 1, 3);
- else
- stsi(info, 15, 1, 2);
+ stsi(info, 15, 1, min(topology_max_mnest, 4));
}
int arch_update_cpu_topology(void)
@@ -442,6 +408,11 @@ static const struct cpumask *cpu_book_mask(int cpu)
return &per_cpu(cpu_topology, cpu).book_mask;
}
+static const struct cpumask *cpu_drawer_mask(int cpu)
+{
+ return &per_cpu(cpu_topology, cpu).drawer_mask;
+}
+
static int __init early_parse_topology(char *p)
{
return kstrtobool(p, &topology_enabled);
@@ -452,6 +423,7 @@ static struct sched_domain_topology_level s390_topology[] = {
{ cpu_thread_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
{ cpu_book_mask, SD_INIT_NAME(BOOK) },
+ { cpu_drawer_mask, SD_INIT_NAME(DRAWER) },
{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
{ NULL, },
};
@@ -487,6 +459,7 @@ static int __init s390_topology_init(void)
printk(KERN_CONT " / %d\n", info->mnest);
alloc_masks(info, &socket_info, 1);
alloc_masks(info, &book_info, 2);
+ alloc_masks(info, &drawer_info, 3);
set_sched_topology(s390_topology);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.