perf: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability

Since commit bd2756811766 ("perf: Rewrite core context handling") the
relationship between perf_event_context and PMUs has changed so that
the error scenario that PERF_PMU_CAP_HETEROGENEOUS_CPUS originally
silenced no longer exists.

Remove the capability to avoid confusion that it actually influences
any perf core behavior and shift down the following capability bits to
fill in the unused space. This change should be a no-op.

Signed-off-by: James Clark <james.clark@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20230724134500.970496-5-james.clark@arm.com

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index dd92b4f..9b1cf3c 100644 (file)
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -288,10 +288,9 @@ struct perf_event_pmu_context;
 #define PERF_PMU_CAP_EXTENDED_REGS             0x0008
 #define PERF_PMU_CAP_EXCLUSIVE                 0x0010
 #define PERF_PMU_CAP_ITRACE                    0x0020
-#define PERF_PMU_CAP_HETEROGENEOUS_CPUS                0x0040
-#define PERF_PMU_CAP_NO_EXCLUDE                        0x0080
-#define PERF_PMU_CAP_AUX_OUTPUT                        0x0100
-#define PERF_PMU_CAP_EXTENDED_HW_TYPE          0x0200
+#define PERF_PMU_CAP_NO_EXCLUDE                        0x0040
+#define PERF_PMU_CAP_AUX_OUTPUT                        0x0080
+#define PERF_PMU_CAP_EXTENDED_HW_TYPE          0x0100
 
 struct perf_output_handle;