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authorHeiko Carstens <heiko.carstens@de.ibm.com>2012-08-29 14:12:20 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-09-26 15:45:03 +0200
commit6668022c7bde3fdc96d3d257294a7216c7a46829 (patch)
tree796f5d9eb8d1acc5541c22cd06a674fee1442d95 /arch/s390
parentd35339a42dd1f53b0bb86cf75418a9b7cf5f0f30 (diff)
s390/cache: add cpu cache information to /proc/cpuinfo
Add a line for each cpu cache to /proc/cpuinfo. Since we only have information of private cpu caches in sysfs we add a line for each cpu cache in /proc/cpuinfo which will also contain information about shared caches. For a z196 machine /proc/cpuinfo now looks like: vendor_id : IBM/S390 bogomips per cpu: 14367.00 features : esan3 zarch stfle msa ldisp eimm dfp etf3eh highgprs cache0 : level=1 type=Data scope=Private size=64K line_size=256 associativity=4 cache1 : level=1 type=Instruction scope=Private size=128K line_size=256 associativity=8 cache2 : level=2 type=Unified scope=Private size=1536K line_size=256 associativity=12 cache3 : level=3 type=Unified scope=Shared size=24576K line_size=256 associativity=12 cache4 : level=4 type=Unified scope=Shared size=196608K line_size=256 associativity=24 processor 0: version = FF, identification = 000123, machine = 2817 processor 1: version = FF, identification = 100123, machine = 2817 processor 2: version = FF, identification = 200123, machine = 2817 processor 3: version = FF, identification = 200123, machine = 2817 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/processor.h6
-rw-r--r--arch/s390/kernel/cache.c46
-rw-r--r--arch/s390/kernel/processor.c1
3 files changed, 43 insertions, 10 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 46fe1fbf91c5..7e81ff17a89b 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -140,6 +140,12 @@ struct task_struct;
struct mm_struct;
struct seq_file;
+#ifdef CONFIG_64BIT
+extern void show_cacheinfo(struct seq_file *m);
+#else
+static inline void show_cacheinfo(struct seq_file *m) { }
+#endif
+
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
diff --git a/arch/s390/kernel/cache.c b/arch/s390/kernel/cache.c
index 5e20bab4df22..8df8d8a19c98 100644
--- a/arch/s390/kernel/cache.c
+++ b/arch/s390/kernel/cache.c
@@ -6,6 +6,7 @@
*/
#include <linux/notifier.h>
+#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/slab.h>
@@ -17,8 +18,9 @@ struct cache {
unsigned int line_size;
unsigned int associativity;
unsigned int nr_sets;
- int level;
- int type;
+ unsigned int level : 3;
+ unsigned int type : 2;
+ unsigned int private : 1;
struct list_head list;
};
@@ -83,6 +85,24 @@ static const char * const cache_type_string[] = {
static struct cache_dir *cache_dir_cpu[NR_CPUS];
static LIST_HEAD(cache_list);
+void show_cacheinfo(struct seq_file *m)
+{
+ struct cache *cache;
+ int index = 0;
+
+ list_for_each_entry(cache, &cache_list, list) {
+ seq_printf(m, "cache%-11d: ", index);
+ seq_printf(m, "level=%d ", cache->level);
+ seq_printf(m, "type=%s ", cache_type_string[cache->type]);
+ seq_printf(m, "scope=%s ", cache->private ? "Private" : "Shared");
+ seq_printf(m, "size=%luK ", cache->size >> 10);
+ seq_printf(m, "line_size=%u ", cache->line_size);
+ seq_printf(m, "associativity=%d", cache->associativity);
+ seq_puts(m, "\n");
+ index++;
+ }
+}
+
static inline unsigned long ecag(int ai, int li, int ti)
{
unsigned long cmd, val;
@@ -93,7 +113,7 @@ static inline unsigned long ecag(int ai, int li, int ti)
return val;
}
-static int __init cache_add(int level, int type)
+static int __init cache_add(int level, int private, int type)
{
struct cache *cache;
int ti;
@@ -107,8 +127,9 @@ static int __init cache_add(int level, int type)
cache->associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);
cache->nr_sets = cache->size / cache->associativity;
cache->nr_sets /= cache->line_size;
+ cache->private = private;
cache->level = level + 1;
- cache->type = type;
+ cache->type = type - 1;
list_add_tail(&cache->list, &cache_list);
return 0;
}
@@ -117,23 +138,26 @@ static void __init cache_build_info(void)
{
struct cache *cache, *next;
union cache_topology ct;
- int level, rc;
+ int level, private, rc;
ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
for (level = 0; level < CACHE_MAX_LEVEL; level++) {
switch (ct.ci[level].scope) {
case CACHE_SCOPE_NOTEXISTS:
case CACHE_SCOPE_RESERVED:
- case CACHE_SCOPE_SHARED:
return;
+ case CACHE_SCOPE_SHARED:
+ private = 0;
+ break;
case CACHE_SCOPE_PRIVATE:
+ private = 1;
break;
}
if (ct.ci[level].type == CACHE_TYPE_SEPARATE) {
- rc = cache_add(level, CACHE_TYPE_DATA);
- rc |= cache_add(level, CACHE_TYPE_INSTRUCTION);
+ rc = cache_add(level, private, CACHE_TYPE_DATA);
+ rc |= cache_add(level, private, CACHE_TYPE_INSTRUCTION);
} else {
- rc = cache_add(level, ct.ci[level].type);
+ rc = cache_add(level, private, ct.ci[level].type);
}
if (rc)
goto error;
@@ -208,7 +232,7 @@ DEFINE_CACHE_ATTR(size, "%luK\n", index->cache->size >> 10);
DEFINE_CACHE_ATTR(coherency_line_size, "%u\n", index->cache->line_size);
DEFINE_CACHE_ATTR(number_of_sets, "%u\n", index->cache->nr_sets);
DEFINE_CACHE_ATTR(ways_of_associativity, "%u\n", index->cache->associativity);
-DEFINE_CACHE_ATTR(type, "%s\n", cache_type_string[index->cache->type - 1]);
+DEFINE_CACHE_ATTR(type, "%s\n", cache_type_string[index->cache->type]);
DEFINE_CACHE_ATTR(level, "%d\n", index->cache->level);
static ssize_t shared_cpu_map_func(struct kobject *kobj, int type, char *buf)
@@ -298,6 +322,8 @@ static int __cpuinit cache_add_cpu(int cpu)
if (!cache_dir)
return -ENOMEM;
list_for_each_entry(cache, &cache_list, list) {
+ if (!cache->private)
+ break;
rc = cache_create_index_dir(cache_dir, cache, index, cpu);
if (rc)
return rc;
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 22bf8f0ee093..63f3b76e37a9 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -58,6 +58,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
seq_printf(m, "%s ", hwcap_str[i]);
seq_puts(m, "\n");
+ show_cacheinfo(m);
}
get_online_cpus();
if (cpu_online(n)) {