[PATCH] riscv: Kconfig.errata: Add dependency for RISCV_SBI in ERRATA_ANDES config

[Lad, Prabhakar]

Hi Randy,

On Fri, Sep 1, 2023 at 9:27 PM Randy Dunlap <rdunlap at infradead.org> wrote:
>
> Hi,
>
> On 9/1/23 04:03, Prabhakar wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
> >
> > Andes errata uses sbi_ecalll() which is only available if RISCV_SBI is
> > enabled. So add an dependency for RISCV_SBI in ERRATA_ANDES config to
> > avoid any build failures.
> >
> > Reported-by: kernel test robot <lkp at intel.com>
> > Closes: https://lore.kernel.org/oe-kbuild-all/202308311610.ec6bm2G8-lkp@intel.com/
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
> > ---
> >  arch/riscv/Kconfig.errata | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/riscv/Kconfig.errata b/arch/riscv/Kconfig.errata
> > index bee5d838763b..566bcefeab50 100644
> > --- a/arch/riscv/Kconfig.errata
> > +++ b/arch/riscv/Kconfig.errata
> > @@ -2,7 +2,7 @@ menu "CPU errata selection"
> >
> >  config ERRATA_ANDES
> >       bool "Andes AX45MP errata"
> > -     depends on RISCV_ALTERNATIVE
> > +     depends on RISCV_ALTERNATIVE && RISCV_SBI
> >       help
> >         All Andes errata Kconfig depend on this Kconfig. Disabling
> >         this Kconfig will disable all Andes errata. Please say "Y"
>
>
> I'm still seeing build warnings/errors after applying all 3 RISC-V
> Kconfig patches from today (2023 SEP 01).
>
> WARNING: unmet direct dependencies detected for ERRATA_ANDES
>   Depends on [n]: RISCV_ALTERNATIVE [=y] && RISCV_SBI [=n]
>   Selected by [y]:
>   - ARCH_R9A07G043 [=y] && SOC_RENESAS [=y] && RISCV [=y]
>
> ../arch/riscv/errata/andes/errata.c: In function 'ax45mp_iocp_sw_workaround':
> ../arch/riscv/errata/andes/errata.c:29:23: error: storage size of 'ret' isn't known
>    29 |         struct sbiret ret;
>       |                       ^~~
> ../arch/riscv/errata/andes/errata.c:35:15: error: implicit declaration of function 'sbi_ecall' [-Werror=implicit-function-declaration]
>    35 |         ret = sbi_ecall(ANDESTECH_SBI_EXT_ANDES, ANDES_SBI_EXT_IOCP_SW_WORKAROUND,
>       |               ^~~~~~~~~
> ../arch/riscv/errata/andes/errata.c:29:23: warning: unused variable 'ret' [-Wunused-variable]
>    29 |         struct sbiret ret;
>       |                       ^~~
>
> ARCH_R9A07G043 in drivers/soc/renesas/Kconfig selects ERRATA_ANDES and
> ERRATA_ANDES_CMO even though RISCV_SBI is not set/enabled.
>

You need to apply patch [1] aswell.

[1] https://patchwork.kernel.org/project/linux-riscv/patch/20230901110936.313171-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

Cheers,
Prabhakar