【OLK-6.6】AMD: support the UMC Performance Counters for Zen4

【特性描述】
Unified Memory Controller (UMC) events were introduced with Zen 4 as a part of the Performance Monitoring Version 2 (PerfMonV2) enhancements. Currently, Zen 4 supports up to 12 channels of DDR5 memory and each of them are controlled by a dedicated UMC. Each UMC, in turn, has its own
set of performance monitoring counters. These counters can provide info on UMC command activity which in turn can be used to derive utilization and bandwidth. Using perf tool, users can profile activity either on a combined basis (includes all active UMCs) or for individual UMCs.

【硬件架构】
X86

Backporting the patches from the upstream,
https://lore.kernel.org/all/cover.1696425185.git.sandipan.das@amd.com/

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Running the test on a 1P 9654 Genoa Zen4 system populated with 2 memory channels.

tools/perf$ find /sys/bus/event_source/devices/ -maxdepth 1 -name "amd_umc_*" | sort
/sys/bus/event_source/devices/amd_umc_0
/sys/bus/event_source/devices/amd_umc_1

tools/perf$ sudo ./perf stat -e amd_umc_0/umc_cas_cmd.all/ -e amd_umc_1/umc_cas_cmd.all/ -a -- sleep 1

Performance counter stats for 'system wide':

        191026      amd_umc_0/umc_cas_cmd.all/
        189860      amd_umc_1/umc_cas_cmd.all/

   1.001168813 seconds time elapsed

tools/perf$ sudo ./perf stat -e amd_umc/umc_cas_cmd.all/ -a -- sleep 1

Performance counter stats for 'system wide':

        769669      amd_umc/umc_cas_cmd.all/

   1.001398868 seconds time elapsed

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