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Subject[PATCHv2] Support for perf on AMD family17h processors
Date
This patch enables perf core PMU support for AMD family17h processors. In
family17h, there is no PMC-event constraint. All events, irrespective of
the type, can be measured using any of the performance counters.

Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
---

v1->v2

* Removed renaming of amd_core_pmu_init and associated comment.
* Changed comment style to follow guidelines.

arch/x86/events/amd/core.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index f5f4b3f..afb222b 100644
--- 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;
--
2.7.4
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