Intel: Backport to fix SPR MCC UPI uncore discovery warnings · Pull Request !1834 · anolis/cloud-kernel

bugzilla: https://bugzilla.openanolis.cn/show_bug.cgi?id=5741

The discovery table of UPI on SPR MCC is broken. The broken discovery table triggers kernel warning and call trace on SPR MCC which is overkilled:
“WARNING: CPU: xx PID: xx at arch/x86/events/intel/uncore_discovery.c:184 intel_uncore_has_discovery_tables+ ……”

The fix patch set is to mitigate the issue by providing a hardcode pre-defined table, and it also refines the error handling code.

Fix commits from mainline kernel v6.3-rc1:
5d515ee40cb5 perf/x86/uncore: Don't WARN_ON_ONCE() for a broken discovery table
65248a9a9ee1 perf/x86/uncore: Add a quirk for UPI on SPR
bd9514a4d5ec perf/x86/uncore: Ignore broken units in discovery table
3af548f23610 perf/x86/uncore: Fix potential NULL pointer in uncore_get_alias_name
dbf061b26221 perf/x86/uncore: Factor out uncore_device_to_die()

It has been verified that with the backported patches upon kernel devel-5.10, the uncore related kernel warning and call trace are not seen anymore on Intel SPR MCC, and the missing uncore_m3upi_x devices become available.

类型	指派人员	状态
审查	Guanjun Artie Ding zelindeng Xuchun Shang	已完成 (0/0人)
测试	小龙已测试通过	已完成 (1/1人)

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