[PATCH 3/4] riscv: Make legacy counter enum match the HW numbering

Alexandre Ghiti
2023-04-13T16:21:27Z

RISCV_PMU_LEGACY_INSTRET used to be set to 1 whereas the offset of this
hardware counter from CSR_CYCLE is actually 2: make this offset match the
real hw offset so that we can directly expose those values to userspace.

Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
---
drivers/perf/riscv_pmu_legacy.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/riscv_pmu_legacy.c b/drivers/perf/riscv_pmu_legacy.c
index ca9e20bfc7ac..0d8c9d8849ee 100644
--- a/drivers/perf/riscv_pmu_legacy.c
+++ b/drivers/perf/riscv_pmu_legacy.c
@@ -12,8 +12,11 @@
#include <linux/perf/riscv_pmu.h>
#include <linux/platform_device.h>

-#define RISCV_PMU_LEGACY_CYCLE 0
-#define RISCV_PMU_LEGACY_INSTRET 1
+enum {
+ RISCV_PMU_LEGACY_CYCLE,
+ RISCV_PMU_LEGACY_TIME,
+ RISCV_PMU_LEGACY_INSTRET
+};

static bool pmu_init_done;

--
2.37.2