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Diffstat (limited to 'arch/s390/kernel/topology.c')
-rw-r--r--arch/s390/kernel/topology.c105
1 files changed, 33 insertions, 72 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 13559c993847..94b06c31fc8a 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -18,55 +18,20 @@
#include <linux/cpuset.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
-#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 reserved0[4];
- unsigned char :6;
- unsigned char pp:2;
- unsigned char reserved1;
- unsigned short origin;
- unsigned long mask[CPU_BITS / BITS_PER_LONG];
-};
-
-struct tl_container {
- unsigned char reserved[7];
- unsigned char id;
-};
-
-union tl_entry {
- unsigned char nl;
- struct tl_cpu cpu;
- struct tl_container container;
-};
-
-struct tl_info {
- unsigned char reserved0[2];
- unsigned short length;
- unsigned char mag[NR_MAG];
- unsigned char reserved1;
- unsigned char mnest;
- unsigned char reserved2[4];
- union tl_entry tle[0];
-};
-
struct mask_info {
struct mask_info *next;
unsigned char id;
cpumask_t mask;
};
-static int topology_enabled;
+static int topology_enabled = 1;
static void topology_work_fn(struct work_struct *work);
-static struct tl_info *tl_info;
-static int machine_has_topology;
+static struct sysinfo_15_1_x *tl_info;
static struct timer_list topology_timer;
static void set_topology_timer(void);
static DECLARE_WORK(topology_work, topology_work_fn);
@@ -88,8 +53,10 @@ static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
cpumask_t mask;
cpus_clear(mask);
- if (!topology_enabled || !machine_has_topology)
- return cpu_possible_map;
+ if (!topology_enabled || !MACHINE_HAS_TOPOLOGY) {
+ cpumask_copy(&mask, cpumask_of(cpu));
+ return mask;
+ }
while (info) {
if (cpu_isset(cpu, info->mask)) {
mask = info->mask;
@@ -102,18 +69,18 @@ static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
return mask;
}
-static void add_cpus_to_mask(struct tl_cpu *tl_cpu, struct mask_info *book,
- struct mask_info *core)
+static void add_cpus_to_mask(struct topology_cpu *tl_cpu,
+ struct mask_info *book, struct mask_info *core)
{
unsigned int cpu;
- for (cpu = find_first_bit(&tl_cpu->mask[0], CPU_BITS);
- cpu < CPU_BITS;
- cpu = find_next_bit(&tl_cpu->mask[0], CPU_BITS, cpu + 1))
+ for (cpu = find_first_bit(&tl_cpu->mask[0], TOPOLOGY_CPU_BITS);
+ cpu < TOPOLOGY_CPU_BITS;
+ cpu = find_next_bit(&tl_cpu->mask[0], TOPOLOGY_CPU_BITS, cpu + 1))
{
unsigned int rcpu, lcpu;
- rcpu = CPU_BITS - 1 - cpu + tl_cpu->origin;
+ rcpu = TOPOLOGY_CPU_BITS - 1 - cpu + tl_cpu->origin;
for_each_present_cpu(lcpu) {
if (cpu_logical_map(lcpu) != rcpu)
continue;
@@ -146,15 +113,14 @@ static void clear_masks(void)
#endif
}
-static union tl_entry *next_tle(union tl_entry *tle)
+static union topology_entry *next_tle(union topology_entry *tle)
{
- if (tle->nl)
- return (union tl_entry *)((struct tl_container *)tle + 1);
- else
- return (union tl_entry *)((struct tl_cpu *)tle + 1);
+ if (!tle->nl)
+ return (union topology_entry *)((struct topology_cpu *)tle + 1);
+ return (union topology_entry *)((struct topology_container *)tle + 1);
}
-static void tl_to_cores(struct tl_info *info)
+static void tl_to_cores(struct sysinfo_15_1_x *info)
{
#ifdef CONFIG_SCHED_BOOK
struct mask_info *book = &book_info;
@@ -162,13 +128,13 @@ static void tl_to_cores(struct tl_info *info)
struct mask_info *book = NULL;
#endif
struct mask_info *core = &core_info;
- union tl_entry *tle, *end;
+ union topology_entry *tle, *end;
spin_lock_irq(&topology_lock);
clear_masks();
tle = info->tle;
- end = (union tl_entry *)((unsigned long)info + info->length);
+ end = (union topology_entry *)((unsigned long)info + info->length);
while (tle < end) {
switch (tle->nl) {
#ifdef CONFIG_SCHED_BOOK
@@ -186,7 +152,6 @@ static void tl_to_cores(struct tl_info *info)
break;
default:
clear_masks();
- machine_has_topology = 0;
goto out;
}
tle = next_tle(tle);
@@ -223,7 +188,7 @@ int topology_set_cpu_management(int fc)
int cpu;
int rc;
- if (!machine_has_topology)
+ if (!MACHINE_HAS_TOPOLOGY)
return -EOPNOTSUPP;
if (fc)
rc = ptf(PTF_VERTICAL);
@@ -251,7 +216,7 @@ static void update_cpu_core_map(void)
spin_unlock_irqrestore(&topology_lock, flags);
}
-static void store_topology(struct tl_info *info)
+void store_topology(struct sysinfo_15_1_x *info)
{
#ifdef CONFIG_SCHED_BOOK
int rc;
@@ -265,11 +230,11 @@ static void store_topology(struct tl_info *info)
int arch_update_cpu_topology(void)
{
- struct tl_info *info = tl_info;
+ struct sysinfo_15_1_x *info = tl_info;
struct sys_device *sysdev;
int cpu;
- if (!machine_has_topology) {
+ if (!MACHINE_HAS_TOPOLOGY) {
update_cpu_core_map();
topology_update_polarization_simple();
return 0;
@@ -311,9 +276,9 @@ static void set_topology_timer(void)
static int __init early_parse_topology(char *p)
{
- if (strncmp(p, "on", 2))
+ if (strncmp(p, "off", 3))
return 0;
- topology_enabled = 1;
+ topology_enabled = 0;
return 0;
}
early_param("topology", early_parse_topology);
@@ -323,7 +288,7 @@ static int __init init_topology_update(void)
int rc;
rc = 0;
- if (!machine_has_topology) {
+ if (!MACHINE_HAS_TOPOLOGY) {
topology_update_polarization_simple();
goto out;
}
@@ -335,13 +300,14 @@ out:
}
__initcall(init_topology_update);
-static void alloc_masks(struct tl_info *info, struct mask_info *mask, int offset)
+static void alloc_masks(struct sysinfo_15_1_x *info, struct mask_info *mask,
+ int offset)
{
int i, nr_masks;
- nr_masks = info->mag[NR_MAG - offset];
+ nr_masks = info->mag[TOPOLOGY_NR_MAG - offset];
for (i = 0; i < info->mnest - offset; i++)
- nr_masks *= info->mag[NR_MAG - offset - 1 - i];
+ nr_masks *= info->mag[TOPOLOGY_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));
@@ -351,21 +317,16 @@ static void alloc_masks(struct tl_info *info, struct mask_info *mask, int offset
void __init s390_init_cpu_topology(void)
{
- unsigned long long facility_bits;
- struct tl_info *info;
+ struct sysinfo_15_1_x *info;
int i;
- if (stfle(&facility_bits, 1) <= 0)
- return;
- if (!(facility_bits & (1ULL << 52)) || !(facility_bits & (1ULL << 61)))
+ if (!MACHINE_HAS_TOPOLOGY)
return;
- machine_has_topology = 1;
-
tl_info = alloc_bootmem_pages(PAGE_SIZE);
info = tl_info;
store_topology(info);
pr_info("The CPU configuration topology of the machine is:");
- for (i = 0; i < NR_MAG; i++)
+ for (i = 0; i < TOPOLOGY_NR_MAG; i++)
printk(" %d", info->mag[i]);
printk(" / %d\n", info->mnest);
alloc_masks(info, &core_info, 2);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.