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| author | Srikar Dronamraju <srikar@linux.vnet.ibm.com> | 2020-06-29 16:07:03 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-15 11:07:20 +1000 |
| commit | a87a77cb947cc9fc89f0dad51aeee66a61cc7fc4 (patch) | |
| tree | 99bb82f7e22378610d006f3e74d7d3d37978ada4 /arch | |
| parent | 74b7492e417812ea0f5002e210e2ac07a5728d17 (diff) | |
powerpc/cacheinfo: Add per cpu per index shared_cpu_list
Unlike drivers/base/cacheinfo, powerpc cacheinfo code is not exposing
shared_cpu_list under /sys/devices/system/cpu/cpu<n>/cache/index<m>
Add shared_cpu_list to per cpu per index directory to maintain parity
with x86. Some scripts (example: mmtests
https://github.com/gormanm/mmtests) seem to be looking for
shared_cpu_list instead of shared_cpu_map.
Before this patch:
# ls /sys/devices/system/cpu0/cache/index1
coherency_line_size number_of_sets size ways_of_associativity
level shared_cpu_map type
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_map
00ff
#
After this patch:
# ls /sys/devices/system/cpu0/cache/index1
coherency_line_size number_of_sets shared_cpu_map type
level shared_cpu_list size ways_of_associativity
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_map
00ff
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_list
0-7
#
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200629103703.4538-4-srikar@linux.vnet.ibm.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/cacheinfo.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c index 5be870f99623..d8d4552af30a 100644 --- a/arch/powerpc/kernel/cacheinfo.c +++ b/arch/powerpc/kernel/cacheinfo.c @@ -670,12 +670,20 @@ show_shared_cpumap(struct kobject *k, struct kobj_attribute *attr, char *buf, bo static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *attr, char *buf) { - return show_shared_cpumap(k, attr, buf, false) + return show_shared_cpumap(k, attr, buf, false); +} + +static ssize_t shared_cpu_list_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + return show_shared_cpumap(k, attr, buf, true); } static struct kobj_attribute cache_shared_cpu_map_attr = __ATTR(shared_cpu_map, 0444, shared_cpu_map_show, NULL); +static struct kobj_attribute cache_shared_cpu_list_attr = + __ATTR(shared_cpu_list, 0444, shared_cpu_list_show, NULL); + /* Attributes which should always be created -- the kobject/sysfs core * does this automatically via kobj_type->default_attrs. This is the * minimum data required to uniquely identify a cache. @@ -684,6 +692,7 @@ static struct attribute *cache_index_default_attrs[] = { &cache_type_attr.attr, &cache_level_attr.attr, &cache_shared_cpu_map_attr.attr, + &cache_shared_cpu_list_attr.attr, NULL, }; |