Merge tag 'iwlwifi-next-for-kalle-2014-12-30' of https://git.kernel.org/pub/scm/linux...

[cascardo/linux.git] / Documentation / ABI / testing / sysfs-devices-system-cpu

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index acb9bfc..99983e6 100644 (file)
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -224,3 +224,50 @@ Description:       Parameters for the Intel P-state driver
                frequency range.
 
                More details can be found in Documentation/cpu-freq/intel-pstate.txt
+
+What:          /sys/devices/system/cpu/cpu*/cache/index*/<set_of_attributes_mentioned_below>
+Date:          July 2014(documented, existed before August 2008)
+Contact:       Sudeep Holla <sudeep.holla@arm.com>
+               Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:   Parameters for the CPU cache attributes
+
+               allocation_policy:
+                       - WriteAllocate: allocate a memory location to a cache line
+                                        on a cache miss because of a write
+                       - ReadAllocate: allocate a memory location to a cache line
+                                       on a cache miss because of a read
+                       - ReadWriteAllocate: both writeallocate and readallocate
+
+               attributes: LEGACY used only on IA64 and is same as write_policy
+
+               coherency_line_size: the minimum amount of data in bytes that gets
+                                    transferred from memory to cache
+
+               level: the cache hierarcy in the multi-level cache configuration
+
+               number_of_sets: total number of sets in the cache, a set is a
+                               collection of cache lines with the same cache index
+
+               physical_line_partition: number of physical cache line per cache tag
+
+               shared_cpu_list: the list of logical cpus sharing the cache
+
+               shared_cpu_map: logical cpu mask containing the list of cpus sharing
+                               the cache
+
+               size: the total cache size in kB
+
+               type:
+                       - Instruction: cache that only holds instructions
+                       - Data: cache that only caches data
+                       - Unified: cache that holds both data and instructions
+
+               ways_of_associativity: degree of freedom in placing a particular block
+                                       of memory in the cache
+
+               write_policy:
+                       - WriteThrough: data is written to both the cache line
+                                       and to the block in the lower-level memory
+                       - WriteBack: data is written only to the cache line and
+                                    the modified cache line is written to main
+                                    memory only when it is replaced