powerpc/pseries: new lparcfg key/value pair: partition_affinity_score
The H_GetPerformanceCounterInfo (GPCI) PHYP hypercall has a subcall, Affinity_Domain_Info_By_Partition, which returns, among other things, a "partition affinity score" for a given LPAR. This score, a value on [0-100], represents the processor-memory affinity for the LPAR in question. A score of 0 indicates the worst possible affinity while a score of 100 indicates perfect affinity. The score can be used to reason about performance. This patch adds the score for the local LPAR to the lparcfg procfile under a new 'partition_affinity_score' key. Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com> Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com> Acked-by: Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200727184605.2945095-2-cheloha@linux.ibm.com
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