powerpc/perf: Add alternative event table and function for power9

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c
index 7332634e18c9..b38acff8a791 100644
--- a/arch/powerpc/perf/power9-pmu.c
+++ b/arch/powerpc/perf/power9-pmu.c
@@ -106,6 +106,21 @@ enum {
 /* PowerISA v2.07 format attribute structure*/
 extern struct attribute_group isa207_pmu_format_group;
 
+/* Table of alternatives, sorted by column 0 */
+static const unsigned int power9_event_alternatives[][MAX_ALT] = {
+        { PM_INST_DISP,                 PM_INST_DISP_ALT },
+};
+
+static int power9_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+        int num_alt = 0;
+
+        num_alt = isa207_get_alternatives(event, alt, power9_event_alternatives,
+                                (int)ARRAY_SIZE(power9_event_alternatives));
+
+        return num_alt;
+}
+
 GENERIC_EVENT_ATTR(cpu-cycles,                  PM_CYC);
 GENERIC_EVENT_ATTR(stalled-cycles-frontend,     PM_ICT_NOSLOT_CYC);
 GENERIC_EVENT_ATTR(stalled-cycles-backend,      PM_CMPLU_STALL);
@@ -383,6 +398,7 @@ static struct power_pmu power9_isa207_pmu = {
         .config_bhrb            = power9_config_bhrb,
         .bhrb_filter_map        = power9_bhrb_filter_map,
         .get_constraint         = isa207_get_constraint,
+        .get_alternatives       = power9_get_alternatives,
         .disable_pmc            = isa207_disable_pmc,
         .flags                  = PPMU_NO_SIAR | PPMU_ARCH_207S,
         .n_generic              = ARRAY_SIZE(power9_generic_events),
@@ -401,6 +417,7 @@ static struct power_pmu power9_pmu = {
         .config_bhrb            = power9_config_bhrb,
         .bhrb_filter_map        = power9_bhrb_filter_map,
         .get_constraint         = isa207_get_constraint,
+        .get_alternatives       = power9_get_alternatives,
         .disable_pmc            = isa207_disable_pmc,
         .flags                  = PPMU_HAS_SIER | PPMU_ARCH_207S,
         .n_generic              = ARRAY_SIZE(power9_generic_events),