[PATCH 3/5] lib: sbi_pmu: Add SBI PMU event info function details.

[Anup Patel]

On Wed, Nov 20, 2024 at 1:04 AM Atish Patra <atishp at rivosinc.com> wrote:
>
> The SBI v3.0 introduced a new function to query about the events
> without invoking CFG_MATCH. This allows supervisor software to
> identify which events are supported on the platform with single
> SBI call instead of a CFG_MATCH for each event.
>
> Signed-off-by: Atish Patra <atishp at rivosinc.com>

LGTM.

Reviewed-by: Anup Patel <anup at brainfault.org>

Regards,
Anup

> ---
>  include/sbi/sbi_ecall_interface.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/include/sbi/sbi_ecall_interface.h b/include/sbi/sbi_ecall_interface.h
> index bcb7359f20c5..29b18f5fd003 100644
> --- a/include/sbi/sbi_ecall_interface.h
> +++ b/include/sbi/sbi_ecall_interface.h
> @@ -12,6 +12,8 @@
>
>  /* clang-format off */
>
> +#include <sbi/sbi_types.h>
> +
>  /* SBI Extension IDs */
>  #define SBI_EXT_0_1_SET_TIMER                  0x0
>  #define SBI_EXT_0_1_CONSOLE_PUTCHAR            0x1
> @@ -107,6 +109,7 @@
>  #define SBI_EXT_PMU_COUNTER_FW_READ    0x5
>  #define SBI_EXT_PMU_COUNTER_FW_READ_HI 0x6
>  #define SBI_EXT_PMU_SNAPSHOT_SET_SHMEM 0x7
> +#define SBI_EXT_PMU_EVENT_GET_INFO             0x8
>
>  /* SBI function IDs for DBTR extension */
>  #define SBI_EXT_DBTR_NUM_TRIGGERS      0x0
> @@ -256,6 +259,12 @@ enum sbi_pmu_ctr_type {
>         SBI_PMU_CTR_TYPE_FW,
>  };
>
> +struct sbi_pmu_event_info {
> +       uint32_t event_idx;
> +       uint32_t output;
> +       uint64_t event_data;
> +};
> +
>  /* Helper macros to decode event idx */
>  #define SBI_PMU_EVENT_IDX_MASK 0xFFFFF
>  #define SBI_PMU_EVENT_IDX_TYPE_OFFSET 16
>
> --
> 2.34.1
>
>
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