drivers/perf: riscv: Add SBI v3.0 flag

There are new PMU related features introduced in SBI v3.0.
1. Raw Event v2 which allows mhpmeventX value to be 56 bit wide.
2. Get Event info function to do a bulk query at one shot.

Reviewed-by: Anup Patel <[email protected]>
Signed-off-by: Atish Patra <[email protected]>
Acked-by: Paul Walmsley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>

Author: atishp04

drivers/perf/riscv_pmu_sbi.c

@@ -63,6 +63,7 @@ PMU_FORMAT_ATTR(event, "config:0-47");
 PMU_FORMAT_ATTR(firmware, "config:62-63");
 
 static bool sbi_v2_available;
+static bool sbi_v3_available;
 static DEFINE_STATIC_KEY_FALSE(sbi_pmu_snapshot_available);
 #define sbi_pmu_snapshot_available() \
 	static_branch_unlikely(&sbi_pmu_snapshot_available)
@@ -1452,6 +1453,9 @@ static int __init pmu_sbi_devinit(void)
 	if (sbi_spec_version >= sbi_mk_version(2, 0))
 		sbi_v2_available = true;
 
+	if (sbi_spec_version >= sbi_mk_version(3, 0))
+		sbi_v3_available = true;
+
 	ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_RISCV_STARTING,
 				      "perf/riscv/pmu:starting",
 				      pmu_sbi_starting_cpu, pmu_sbi_dying_cpu);