Commit 9ed9647d authored Sep 21, 2020 by Kim Phillips Committed by Peter Zijlstra Sep 24, 2020

perf/amd/uncore: Inform the user how many counters each uncore PMU has



Previously, the uncore driver would say "NB counters detected" on F17h
machines, which don't have NorthBridge (NB) counters.  They have Data
Fabric (DF) counters.  Just use the pmu.name to inform users which pmu
to use and its associated counter count.

F17h dmesg BEFORE:

amd_uncore: AMD NB counters detected
amd_uncore: AMD LLC counters detected

F17h dmesg AFTER:

amd_uncore: 4 amd_df counters detected
amd_uncore: 6 amd_l3 counters detected

Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200921144330.6331-5-kim.phillips@amd.com

parent 87a54a1f

arch/x86/events/amd/uncore.c

+7 −6

Original line number	Diff line number	Diff line
		@@ -595,9 +595,10 @@ static int __init amd_uncore_init(void)
		if (ret)
		goto fail_nb;

		pr_info("%s NB counters detected\n",
		boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ?
		"HYGON" : "AMD");
		pr_info("%d %s %s counters detected\n", num_counters_nb,
		boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ? "HYGON" : "",
		amd_nb_pmu.name);

		ret = 0;
		}

		@@ -626,9 +627,9 @@ static int __init amd_uncore_init(void)
		if (ret)
		goto fail_llc;

		pr_info("%s LLC counters detected\n",
		boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ?
		"HYGON" : "AMD");
		pr_info("%d %s %s counters detected\n", num_counters_llc,
		boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ? "HYGON" : "",
		amd_llc_pmu.name);
		ret = 0;
		}

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