path: root/Documentation/ABI
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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-14 16:10:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-14 16:10:09 -0800
commite6b5be2be4e30037eb551e0ed09dd97bd00d85d3 (patch)
tree88801365987a0dc64d62d47e8a11f3b44691c37f /Documentation/ABI
parent37da7bbbe84fe9e8862940d3f9194fd27dce59bb (diff)
parentf1c488a78d9f1a22cdb15648c15e70fd82ed229a (diff)
Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
Diffstat (limited to 'Documentation/ABI')
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index acb9bfc89b48..99983e67c13c 100644
--- 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

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