SBI v2.0 added few functions to improve SBI PMU extension. In order
to be backward compatible, the driver must use these functions only
if SBI v2.0 is available.
Signed-off-by: Atish Patra <atishp@xxxxxxxxxxxx>
---
drivers/perf/riscv_pmu_sbi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 16acd4dcdb96..40a335350d08 100644
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
@@ -35,6 +35,8 @@
PMU_FORMAT_ATTR(event, "config:0-47");
PMU_FORMAT_ATTR(firmware, "config:63");
+static bool sbi_v2_available;
+
static struct attribute *riscv_arch_formats_attr[] = {
&format_attr_event.attr,
&format_attr_firmware.attr,
@@ -1108,6 +1110,9 @@ static int __init pmu_sbi_devinit(void)
return 0;
}
+ if (sbi_spec_version >= sbi_mk_version(2, 0))
+ sbi_v2_available = true;
+
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_RISCV_STARTING,
"perf/riscv/pmu:starting",
pmu_sbi_starting_cpu, pmu_sbi_dying_cpu);
--
2.34.1
