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| author | Fenghua Yu <fenghua.yu@intel.com> | 2010-07-29 17:13:45 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-08-03 15:58:56 -0700 |
| commit | 0199114c31798af5b83841b21759b64171060d9b (patch) | |
| tree | a50a9eb0b1f2a43fb92d6143931fb0f688d766e8 /Documentation/hwmon | |
| parent | 55d435a227bd28c77afab326de44dfacc0b15059 (diff) | |
| download | kernel_samsung_crespo-0199114c31798af5b83841b21759b64171060d9b.tar.gz kernel_samsung_crespo-0199114c31798af5b83841b21759b64171060d9b.tar.bz2 kernel_samsung_crespo-0199114c31798af5b83841b21759b64171060d9b.zip | |
x86, hwmon: Package Level Thermal/Power: power limit
Power limit notification feature is published in Intel 64 and IA-32
Architectures SDMV Vol 3A 14.5.6 Power Limit Notification.
It is implemented first on Intel Sandy Bridge platform.
The patch handles notification interrupt. Interrupt handler dumps power limit
information in log_buf, logs the event in mce log, and increases the event
counters (core_power_limit and package_power_limit). Upper level applications
could use the data to detect system health or diagnose functionality/performance
issues.
In the future, the event could be handled in a more fancy way.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
LKML-Reference: <1280448826-12004-5-git-send-email-fenghua.yu@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'Documentation/hwmon')
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