[PATCH v3] riscv: dts: allwinner: d1: Add PMU event node

[Inochi Amaoto]

D1 has several pmu events supported by opensbi.
These events can be used by perf for profiling.

Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxxxx>
Link: https://dl.linux-sunxi.org/D1/Xuantie_C906_R1S0_User_Manual.pdf
---
changed from v2:
1. move pmu node from /soc to / to avoid warnings when cheching.

The meaning of T-HEAD events can be found in this pending patch:
https://lore.kernel.org/linux-perf-users/IA1PR20MB4953DD82D0116EC291C21777BBE2A@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

The patch above also provides a example that shows how to setup
environment and use perf with T-HEAD events.
---
 arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi b/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
index 8275630af977..ed981af63b55 100644
--- a/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
@@ -73,4 +73,44 @@ plic: interrupt-controller@10000000 {
 			#interrupt-cells = <2>;
 		};
 	};
+
+	pmu {
+		compatible = "riscv,pmu";
+		riscv,event-to-mhpmcounters =
+			<0x00003 0x00003 0x00000008>,
+			<0x00004 0x00004 0x00000010>,
+			<0x00005 0x00005 0x00000200>,
+			<0x00006 0x00006 0x00000100>,
+			<0x10000 0x10000 0x00004000>,
+			<0x10001 0x10001 0x00008000>,
+			<0x10002 0x10002 0x00010000>,
+			<0x10003 0x10003 0x00020000>,
+			<0x10019 0x10019 0x00000040>,
+			<0x10021 0x10021 0x00000020>;
+		riscv,event-to-mhpmevent =
+			<0x00003 0x00000000 0x00000001>,
+			<0x00004 0x00000000 0x00000002>,
+			<0x00005 0x00000000 0x00000007>,
+			<0x00006 0x00000000 0x00000006>,
+			<0x0000a 0x00000000 0x0000000b>,
+			<0x10000 0x00000000 0x0000000c>,
+			<0x10001 0x00000000 0x0000000d>,
+			<0x10002 0x00000000 0x0000000e>,
+			<0x10003 0x00000000 0x0000000f>,
+			<0x10019 0x00000000 0x00000004>,
+			<0x10021 0x00000000 0x00000003>;
+		riscv,raw-event-to-mhpmcounters =
+			<0x00000000 0x00000001 0xffffffff 0xffffffff 0x00000008>,
+			<0x00000000 0x00000002 0xffffffff 0xffffffff 0x00000010>,
+			<0x00000000 0x00000003 0xffffffff 0xffffffff 0x00000020>,
+			<0x00000000 0x00000004 0xffffffff 0xffffffff 0x00000040>,
+			<0x00000000 0x00000005 0xffffffff 0xffffffff 0x00000080>,
+			<0x00000000 0x00000006 0xffffffff 0xffffffff 0x00000100>,
+			<0x00000000 0x00000007 0xffffffff 0xffffffff 0x00000200>,
+			<0x00000000 0x0000000b 0xffffffff 0xffffffff 0x00002000>,
+			<0x00000000 0x0000000c 0xffffffff 0xffffffff 0x00004000>,
+			<0x00000000 0x0000000d 0xffffffff 0xffffffff 0x00008000>,
+			<0x00000000 0x0000000e 0xffffffff 0xffffffff 0x00010000>,
+			<0x00000000 0x0000000f 0xffffffff 0xffffffff 0x00020000>;
+	};
 };
--
2.42.0