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

[Rahul Pathak]

On Wed, Aug 7, 2024 at 2:55 PM Yu-Chien Peter Lin
<peterlin at andestech.com> wrote:
>
> 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 at ventanamicro.com>
> > Co-developed-by: Anup Patel <apatel at ventanamicro.com>
> > Signed-off-by: Anup Patel <apatel at 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?

This function was added in the V3 version of MPXY spec.
Here is the link https://lists.riscv.org/g/tech-prs/message/974

> 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



-- 

Thanks
Rahul Pathak