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IIO stacks to PMON mapping on Skylake servers is exposed through introduced
early attributes /sys/devices/uncore_iio_<pmu_idx>/dieX, where dieX is a
file which holds "Segment:Root Bus" for PCIe root port which can
be monitored by that IIO PMON block. These sysfs attributes are disabled
for multiple segment topologies except VMD domains which start at 0x10000.
This patch removes the limitation and enables IIO stacks to PMON mapping
for multi-segment Skylake servers by introducing segment-aware
intel_uncore_topology structure and attributing the topology configuration
to the segment in skx_iio_get_topology() function.
Reported-by: kernel test robot <lkp@intel.com>
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>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Kyle Meyer <kyle.meyer@hpe.com>
Link: https://lkml.kernel.org/r/20210323150507.2013-1-alexander.antonov@linux.intel.com
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