Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Fenghua Yu <> | Subject | [PATCH v7 16/21] x86/split_lock: Document the new sysfs file for split lock detection | Date | Wed, 17 Apr 2019 14:34:06 -0700 |
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Add an ABI document entry for /sys/devices/system/cpu/split_lock_detect.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> --- .../ABI/testing/sysfs-devices-system-cpu | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 9605dbd4b5b5..aad7b1698065 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -67,6 +67,28 @@ Description: Discover NUMA node a CPU belongs to /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2 +What: /sys/devices/system/cpu/split_lock_detect +Date: March 2019 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: (RW) Control split lock detection on Intel Tremont and + future CPUs + + Reads return split lock detection status: + 0: disabled + 1: enabled + + Writes enable or disable split lock detection: + The first character is one of 'Nn0' or [oO][fF] for off + disables the feature. + The first character is one of 'Yy1' or [oO][nN] for on + enables the feature. + + Please note the interface only shows or controls global setting. + During run time, split lock detection on one CPU may be + disabled if split lock operation in kernel code happens on + the CPU. The interface doesn't show or control split lock + detection on individual CPU. + What: /sys/devices/system/cpu/cpu#/topology/core_id /sys/devices/system/cpu/cpu#/topology/core_siblings /sys/devices/system/cpu/cpu#/topology/core_siblings_list -- 2.19.1
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