lib: sbi_pmu: keep overflow interrupt of stopped hpm counter disabled

After the hardware hpm counter is stopped, it should not raise any new
interrupt as it is already stopped. So add the hw_counter_disable_irq
callback to allow the custom pmu device to control this behavior.

Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Samuel Holland <samuel@sholland.org>

diff --git a/lib/sbi/sbi_pmu.c b/lib/sbi/sbi_pmu.c
index c52e8a2935627dea80a08e04137111bca9e5783c..9694aae4fd3a79022d4d31255e2ef82e9f7a4148 100644 (file)
--- a/lib/sbi/sbi_pmu.c
+++ b/lib/sbi/sbi_pmu.c
@@ -482,6 +482,9 @@ static int pmu_ctr_stop_hw(uint32_t cidx)
        if (!__test_bit(cidx, &mctr_inhbt)) {
                __set_bit(cidx, &mctr_inhbt);
                csr_write(CSR_MCOUNTINHIBIT, mctr_inhbt);
+               if (pmu_dev && pmu_dev->hw_counter_disable_irq) {
+                       pmu_dev->hw_counter_disable_irq(cidx);
+               }
                return 0;
        } else
                return SBI_EALREADY_STOPPED;