MIPS: perf: Add hardware events for P5600

Add cases in perf_event_mipsxx.c for CPU_P5600. All the event numbers
listed for proAptiv also apply to P5600, so we use mipsxxcore_event_map2
and mipsxxcore_cache_map2 too, but the P5600 has 8-bit event numbers so
bit 8 (256) of the user ABI config is used for the parity bit (to
specify odd/even counter events).
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7242/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/perf_event_mipsxx.c

@@ -1386,6 +1386,9 @@ static irqreturn_t mipsxx_pmu_handle_irq(int irq, void *dev)
 /* proAptiv */
 #define IS_BOTH_COUNTERS_PROAPTIV_EVENT(b)				\
 	((b) == 0 || (b) == 1)
+/* P5600 */
+#define IS_BOTH_COUNTERS_P5600_EVENT(b)					\
+	((b) == 0 || (b) == 1)
 
 /* 1004K */
 #define IS_BOTH_COUNTERS_1004K_EVENT(b)					\
@@ -1486,6 +1489,19 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
 				raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
 #ifdef CONFIG_MIPS_MT_SMP
 		raw_event.range = P;
+#endif
+		break;
+	case CPU_P5600:
+		/* 8-bit event numbers */
+		raw_id = config & 0x1ff;
+		base_id = raw_id & 0xff;
+		if (IS_BOTH_COUNTERS_P5600_EVENT(base_id))
+			raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
+		else
+			raw_event.cntr_mask =
+				raw_id > 255 ? CNTR_ODD : CNTR_EVEN;
+#ifdef CONFIG_MIPS_MT_SMP
+		raw_event.range = P;
 #endif
 		break;
 	case CPU_1004K:
@@ -1638,6 +1654,11 @@ init_hw_perf_events(void)
 		mipspmu.general_event_map = &mipsxxcore_event_map2;
 		mipspmu.cache_event_map = &mipsxxcore_cache_map2;
 		break;
+	case CPU_P5600:
+		mipspmu.name = "mips/P5600";
+		mipspmu.general_event_map = &mipsxxcore_event_map2;
+		mipspmu.cache_event_map = &mipsxxcore_cache_map2;
+		break;
 	case CPU_1004K:
 		mipspmu.name = "mips/1004K";
 		mipspmu.general_event_map = &mipsxxcore_event_map;