On Thu, Dec 14, 2023 at 3:45 PM Andrew Jones <ajones@xxxxxxxxxxxxxxxx> wrote:
>
> The SBI STA extension enables steal-time accounting. Add the
> definitions it specifies.
>
> Signed-off-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
> Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
LGTM.
Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx>
Regards,
Anup
> ---
> arch/riscv/include/asm/sbi.h | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index 0892f4421bc4..b6f898c56940 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -31,6 +31,7 @@ enum sbi_ext_id {
> SBI_EXT_SRST = 0x53525354,
> SBI_EXT_PMU = 0x504D55,
> SBI_EXT_DBCN = 0x4442434E,
> + SBI_EXT_STA = 0x535441,
>
> /* Experimentals extensions must lie within this range */
> SBI_EXT_EXPERIMENTAL_START = 0x08000000,
> @@ -243,6 +244,22 @@ enum sbi_ext_dbcn_fid {
> SBI_EXT_DBCN_CONSOLE_WRITE_BYTE = 2,
> };
>
> +/* SBI STA (steal-time accounting) extension */
> +enum sbi_ext_sta_fid {
> + SBI_EXT_STA_STEAL_TIME_SET_SHMEM = 0,
> +};
> +
> +struct sbi_sta_struct {
> + __le32 sequence;
> + __le32 flags;
> + __le64 steal;
> + u8 preempted;
> + u8 pad[47];
> +} __packed;
> +
> +#define SBI_STA_SHMEM_DISABLE -1
> +
> +/* SBI spec version fields */
> #define SBI_SPEC_VERSION_DEFAULT 0x1
> #define SBI_SPEC_VERSION_MAJOR_SHIFT 24
> #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> --
> 2.43.0
>
