linux-kernel - Re: [PATCH v2] mailbox: Improve RISCV_SBI_MPXY

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Message-ID: <CABb+yY32DQdZ1qzYOZffS-6aBgnd0_CaLgpULkY-xA-mj3JtQA@mail.gmail.com>
Date: Sun, 18 Jan 2026 14:52:39 -0600
From: Jassi Brar <jassisinghbrar@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Anup Patel <apatel@...tanamicro.com>, Rahul Pathak <rpathak@...tanamicro.com>, 
	Paul Walmsley <pjw@...nel.org>, linux-riscv@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>
Subject: Re: [PATCH v2] mailbox: Improve RISCV_SBI_MPXY_MBOX guidance

On Thu, Jan 15, 2026 at 8:19 AM Geert Uytterhoeven
<geert+renesas@...der.be> wrote:
>
> RISC-V SBI Message Proxy (MPXY) Mailbox support defaults to enabled, but
> the help text states "If unsure say N".
>
> Recommend enabling this driver, as it is a very critical RISC-V driver
> providing mailbox channels to other drivers such as clock, system MSIs,
> etc.
>
> Fixes: bf3022a4eb119c6b ("mailbox: Add RISC-V SBI message proxy (MPXY) based mailbox driver")
> Suggested-by: Anup Patel <anup@...infault.org>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> This is v2 of "[PATCH] mailbox: RISCV_SBI_MPXY_MBOX should be disabled
> by default".
>
> v2:
>   - Change the config description instead of changing to not enabled by
>     default, as requested by Anup.
> ---
>  drivers/mailbox/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
> index e47cb68989267881..c27c1097db21be27 100644
> --- a/drivers/mailbox/Kconfig
> +++ b/drivers/mailbox/Kconfig
> @@ -387,7 +387,7 @@ config RISCV_SBI_MPXY_MBOX
>           Mailbox driver implementation for RISC-V SBI Message Proxy (MPXY)
>           extension. This mailbox driver is used to send messages to the
>           remote processor through the SBI implementation (M-mode firmware
> -         or HS-mode hypervisor). Say Y here if you want to have this support.
> -         If unsure say N.
> +         or HS-mode hypervisor). Say Y here, unless you are sure you do not
> +         need this.
>
>  endif
> --
> 2.43.0
>
Applied to mailbox/for-next.
Thanks.