perf/x86: Add perf support for AMD family-17h processors

This patch enables perf core PMU support for the new AMD family-17h processors.

In family-17h, there is no PMC-event constraint. All events, irrespective of
the type, can be measured using any of the six generic performance counters.

Signed-off-by: Janakarajan Natarajan <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vince Weaver <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index f5f4b3fbbbc2924cbac3fe24d45d949e0997dc8e..afb222b63caeb0217ef34d9b2b193b6b59bd190d 100644 (file)
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -662,7 +662,13 @@ static int __init amd_core_pmu_init(void)
                pr_cont("Fam15h ");
                x86_pmu.get_event_constraints = amd_get_event_constraints_f15h;
                break;
-
+       case 0x17:
+               pr_cont("Fam17h ");
+               /*
+                * In family 17h, there are no event constraints in the PMC hardware.
+                * We fallback to using default amd_get_event_constraints.
+                */
+               break;
        default:
                pr_err("core perfctr but no constraints; unknown hardware!\n");
                return -ENODEV;