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

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Message-ID: <056a7d9af85a20633e54602b2c4d2c3bbbaadd78.1768486684.git.geert+renesas@glider.be>
Date: Thu, 15 Jan 2026 15:19:11 +0100
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Jassi Brar <jassisinghbrar@...il.com>,
	Anup Patel <apatel@...tanamicro.com>,
	Rahul Pathak <rpathak@...tanamicro.com>,
	Paul Walmsley <pjw@...nel.org>
Cc: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Anup Patel <anup@...infault.org>
Subject: [PATCH v2] mailbox: Improve RISCV_SBI_MPXY_MBOX guidance

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