perf/x86/intel/uncore: Enable UPI topology discovery for Skylake Server

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UPI topology discovery relies on data from KTILP0 (offset 0x94) and
KTIPCSTS (offset 0x120) registers which reside under IIO bus(3) on
SKX/CLX.

This patch enable UPI topology discovery on Skylake Server. Topology is
exposed through attributes /sys/devices/uncore_upi_<pmu_idx>/dieX,
where dieX is file which holds "upi_<idx1>:die_<idx2>" connected to
this UPI link.

Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20221117122833.3103580-7-alexander.antonov@linux.intel.com

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Alexander Antonov 2022-11-17 12:28:28 +00:00 • committed by Peter Zijlstra

parent 07813e2a59

commit 4cfce57fa4

1 changed files with 130 additions and 0 deletions

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arch/x86/events/intel/uncore_snbep.c

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