linux/arch/s390/kernel/cache.c

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s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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/*
* Extract CPU cache information and expose them via sysfs.
*
* Copyright IBM Corp. 2012
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/seq_file.h>
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#include <linux/cpu.h>
#include <linux/cacheinfo.h>
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#include <asm/facility.h>
enum {
CACHE_SCOPE_NOTEXISTS,
CACHE_SCOPE_PRIVATE,
CACHE_SCOPE_SHARED,
CACHE_SCOPE_RESERVED,
};
enum {
CTYPE_SEPARATE,
CTYPE_DATA,
CTYPE_INSTRUCTION,
CTYPE_UNIFIED,
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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};
enum {
EXTRACT_TOPOLOGY,
EXTRACT_LINE_SIZE,
EXTRACT_SIZE,
EXTRACT_ASSOCIATIVITY,
};
enum {
CACHE_TI_UNIFIED = 0,
CACHE_TI_DATA = 0,
CACHE_TI_INSTRUCTION,
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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};
struct cache_info {
unsigned char : 4;
unsigned char scope : 2;
unsigned char type : 2;
};
#define CACHE_MAX_LEVEL 8
union cache_topology {
struct cache_info ci[CACHE_MAX_LEVEL];
unsigned long long raw;
};
static const char * const cache_type_string[] = {
"",
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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"Instruction",
"Data",
"",
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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"Unified",
};
static const enum cache_type cache_type_map[] = {
[CTYPE_SEPARATE] = CACHE_TYPE_SEPARATE,
[CTYPE_DATA] = CACHE_TYPE_DATA,
[CTYPE_INSTRUCTION] = CACHE_TYPE_INST,
[CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED,
};
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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void show_cacheinfo(struct seq_file *m)
{
struct cpu_cacheinfo *this_cpu_ci;
struct cacheinfo *cache;
int idx;
if (!test_facility(34))
return;
this_cpu_ci = get_cpu_cacheinfo(cpumask_any(cpu_online_mask));
for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {
cache = this_cpu_ci->info_list + idx;
seq_printf(m, "cache%-11d: ", idx);
seq_printf(m, "level=%d ", cache->level);
seq_printf(m, "type=%s ", cache_type_string[cache->type]);
seq_printf(m, "scope=%s ",
cache->disable_sysfs ? "Shared" : "Private");
seq_printf(m, "size=%dK ", cache->size >> 10);
seq_printf(m, "line_size=%u ", cache->coherency_line_size);
seq_printf(m, "associativity=%d", cache->ways_of_associativity);
seq_puts(m, "\n");
}
}
static inline enum cache_type get_cache_type(struct cache_info *ci, int level)
{
if (level >= CACHE_MAX_LEVEL)
return CACHE_TYPE_NOCACHE;
ci += level;
if (ci->scope != CACHE_SCOPE_SHARED && ci->scope != CACHE_SCOPE_PRIVATE)
return CACHE_TYPE_NOCACHE;
return cache_type_map[ci->type];
}
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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static inline unsigned long ecag(int ai, int li, int ti)
{
return __ecag(ECAG_CACHE_ATTRIBUTE, ai << 4 | li << 1 | ti);
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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}
static void ci_leaf_init(struct cacheinfo *this_leaf, int private,
enum cache_type type, unsigned int level, int cpu)
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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{
int ti, num_sets;
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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if (type == CACHE_TYPE_INST)
ti = CACHE_TI_INSTRUCTION;
else
ti = CACHE_TI_UNIFIED;
this_leaf->level = level + 1;
this_leaf->type = type;
this_leaf->coherency_line_size = ecag(EXTRACT_LINE_SIZE, level, ti);
this_leaf->ways_of_associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);
this_leaf->size = ecag(EXTRACT_SIZE, level, ti);
num_sets = this_leaf->size / this_leaf->coherency_line_size;
num_sets /= this_leaf->ways_of_associativity;
this_leaf->number_of_sets = num_sets;
cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);
if (!private)
this_leaf->disable_sysfs = true;
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
}
int init_cache_level(unsigned int cpu)
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
{
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
unsigned int level = 0, leaves = 0;
union cache_topology ct;
enum cache_type ctype;
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
2015-07-27 07:53:49 +00:00
if (!test_facility(34))
return -EOPNOTSUPP;
if (!this_cpu_ci)
return -EINVAL;
ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
do {
ctype = get_cache_type(&ct.ci[0], level);
if (ctype == CACHE_TYPE_NOCACHE)
break;
/* Separate instruction and data caches */
leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1;
} while (++level < CACHE_MAX_LEVEL);
this_cpu_ci->num_levels = level;
this_cpu_ci->num_leaves = leaves;
return 0;
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
}
int populate_cache_leaves(unsigned int cpu)
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
{
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
struct cacheinfo *this_leaf = this_cpu_ci->info_list;
unsigned int level, idx, pvt;
union cache_topology ct;
enum cache_type ctype;
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
if (!test_facility(34))
return -EOPNOTSUPP;
ct.raw = ecag(EXTRACT_TOPOLOGY, 0, 0);
for (idx = 0, level = 0; level < this_cpu_ci->num_levels &&
idx < this_cpu_ci->num_leaves; idx++, level++) {
if (!this_leaf)
return -EINVAL;
pvt = (ct.ci[level].scope == CACHE_SCOPE_PRIVATE) ? 1 : 0;
ctype = get_cache_type(&ct.ci[0], level);
if (ctype == CACHE_TYPE_SEPARATE) {
ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_DATA, level, cpu);
ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_INST, level, cpu);
} else {
ci_leaf_init(this_leaf++, pvt, ctype, level, cpu);
}
s390/cache: expose cpu cache topology via sysfs Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-23 14:31:13 +00:00
}
return 0;
}