[PATCH 14/16] lib: sbi: Implement SBI MPXY extension

[Yu-Chien Peter Lin <peterlin@andestech.com>]

Hi Anup,

On Tue, Aug 06, 2024 at 01:03:36PM +0530, Anup Patel wrote:
> [EXTERNAL MAIL]
> 
> Implement the SBI MPXY extension which provides an SBI interface to
> the supervisor software for send messages via MPXY framework.
> 
> Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
> Co-developed-by: Anup Patel <apatel@ventanamicro.com>
> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
> ---
>  include/sbi/sbi_ecall_interface.h | 10 +++++
>  lib/sbi/Kconfig                   |  3 ++
>  lib/sbi/objects.mk                |  3 ++
>  lib/sbi/sbi_ecall_mpxy.c          | 68 +++++++++++++++++++++++++++++++
>  4 files changed, 84 insertions(+)
>  create mode 100644 lib/sbi/sbi_ecall_mpxy.c
> 
> diff --git a/include/sbi/sbi_ecall_interface.h b/include/sbi/sbi_ecall_interface.h
> index 6b993b18..085b33e7 100644
> --- a/include/sbi/sbi_ecall_interface.h
> +++ b/include/sbi/sbi_ecall_interface.h
> @@ -35,6 +35,7 @@
>  #define SBI_EXT_DBTR                           0x44425452
>  #define SBI_EXT_SSE                            0x535345
>  #define SBI_EXT_FWFT                           0x46574654
> +#define SBI_EXT_MPXY                           0x4D505859
> 
>  /* SBI function IDs for BASE extension*/
>  #define SBI_EXT_BASE_GET_SPEC_VERSION          0x0
> @@ -406,6 +407,15 @@ enum sbi_sse_state {
>  #define SBI_SSE_EVENT_GLOBAL_BIT               (1 << 15)
>  #define SBI_SSE_EVENT_PLATFORM_BIT             (1 << 14)
> 
> +/* SBI function IDs for MPXY extension */
> +#define SBI_EXT_MPXY_SET_SHMEM                 0x0
> +#define SBI_EXT_MPXY_GET_CHANNEL_IDS           0x1

I am unable to find this FID from the thread:
https://lists.riscv.org/g/tech-rpmi/message/89

Could you please let me know if there's an updated
version of the MPXY Chapter?

Thanks,
Peter Lin

> +#define SBI_EXT_MPXY_READ_ATTRS                        0x2
> +#define SBI_EXT_MPXY_WRITE_ATTRS               0x3
> +#define SBI_EXT_MPXY_SEND_MSG_WITH_RESP                0x4
> +#define SBI_EXT_MPXY_SEND_MSG_NO_RESP          0x5
> +#define SBI_EXT_MPXY_GET_NOTIFICATION_EVENTS   0x6