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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAAhSdy2jBPv1oHNMExddwkOxy8OsEfnWxOU_L+=NpbG+Eqb7MQ@mail.gmail.com>
Date: Thu, 15 Jan 2026 20:37:59 +0530
From: Anup Patel <anup@...infault.org>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Jassi Brar <jassisinghbrar@...il.com>, 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
Subject: Re: [PATCH v2] mailbox: Improve RISCV_SBI_MPXY_MBOX guidance

On Thu, Jan 15, 2026 at 7:49 PM 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>

LGTM.

Reviewed-by: Anup Patel <anup@...infault.org>

Thanks,
Anup

> ---
> 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
>