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authorKajol Jain <kjain@linux.ibm.com>2022-02-25 15:30:22 +0100
committerDan Williams <dan.j.williams@intel.com>2022-03-10 02:50:42 +0100
commit0fab1ba6ad6ba1f76380f92ead95c6e861ef8116 (patch)
tree7c982740ac42d7f9a230876e037e902e5cddf534 /kernel/Kconfig.freezer
parentdrivers/nvdimm: Add nvdimm pmu structure (diff)
downloadlinux-0fab1ba6ad6ba1f76380f92ead95c6e861ef8116.tar.xz
linux-0fab1ba6ad6ba1f76380f92ead95c6e861ef8116.zip
drivers/nvdimm: Add perf interface to expose nvdimm performance stats
A common interface is added to get performance stats reporting support for nvdimm devices. Added interface defines supported event list, config fields for the event attributes and their corresponding bit values which are exported via sysfs. Interface also added support for pmu register/unregister functions, cpu hotplug feature along with macros for handling events addition via sysfs. It adds attribute groups for format, cpumask and events to the pmu structure. User could use the standard perf tool to access perf events exposed via nvdimm pmu. [Declare pmu functions in nd.h file to resolve implicit-function-declaration warning and make hotplug function static as reported by kernel test robot] Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com> Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Link: https://lore.kernel.org/all/202202241242.zqzGkguy-lkp@intel.com/ Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Madhavan Srinivasan <maddy@in.ibm.com> Link: https://lore.kernel.org/r/20220225143024.47947-3-kjain@linux.ibm.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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