From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41C312FB99E; Mon, 12 Jan 2026 15:17:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768231052; cv=none; b=QQIWpUDXPRLJkP2zvMhuva+nW/uGC0P8jsFpIOUpXiXdawp+NSqhpsqbf+p4B50SeYl3aALzeJG50TvCJ8g2diGbZ4NKz6Naqh3oWrAmfDJ0WJb+MJbgdj6qhY9HdodIMFKUrcPv+0FfR4XT3A4iH3ONbWC9duDI1/OfSAUN93s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768231052; c=relaxed/simple; bh=46+wZVHrek5/BXkbofjYmbHldxRKQ7UXKW+8FpuqYUQ=; h=From:Date:Content-Type:MIME-Version:Cc:To:In-Reply-To:References: Message-Id:Subject; b=iw1F6FVxj8dPszj2MgEKFLB741on5ufDoIE+egxpLjRMn3XZAZnZqayOT8tUFZu6JDixj1fhDIios8sESm+69Egu8v45zlYBVY/+lE8ziH004bd4g8kftczLy7MqPS6FDUiisozSgoAwa7WPcTJrQrv/IRqQdaQYFQHStphA9zc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R+xXKhxZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="R+xXKhxZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF03DC19423; Mon, 12 Jan 2026 15:17:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768231051; bh=46+wZVHrek5/BXkbofjYmbHldxRKQ7UXKW+8FpuqYUQ=; h=From:Date:Cc:To:In-Reply-To:References:Subject:From; b=R+xXKhxZjEXz8stVpspzab++bDbjze/00osf+Zag4dFPAdxWb/nwESAEzicrZfAgb /j811lEUc8d0bpWG2gHbXd016sE1zPJwn8KTX+tRcNO2P/phZzEUaWEfggYcAEE+LV IbdC50uEaJHhO7vp+L88qk7e5C0Lx7EnjB6Qf5dUQgOL0EEg5q2gdBmkhXzdvJPd5i 9APFpipPJ3LlE9oVdBmoCmUuW8NL3odhx8eKQ8Dun01FXWmKtQTQork/2MuTtCcjqA AtgE7CnGi9tygghRXkHPwDfuX7H4a7Kg4MqB/8MwMhlfZ6u62+foZ2iY74LEPkSlXp OegJgz58K84mw== From: Rob Herring Date: Mon, 12 Jan 2026 09:17:31 -0600 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Cc: Alexandre Torgue , Mathieu Poirier , =?utf-8?q?Cl=C3=A9ment_Le_Goffic?= , James Clark , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Krzysztof Kozlowski , linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, coresight@lists.linaro.org, Conor Dooley , Mike Leach , Antonio Borneo , linux-kernel@vger.kernel.org, Linus Walleij , Leo Yan , Maxime Coquelin To: Gatien Chevallier In-Reply-To: <20260109-debug_bus-v1-0-8f2142b5a738@foss.st.com> References: <20260109-debug_bus-v1-0-8f2142b5a738@foss.st.com> Message-Id: <176822994422.7758.4716561827275702939.robh@kernel.org> Subject: Re: [PATCH 00/11] bus: add stm32 debug bus and coresight support for stm32mp1x platforms On Fri, 09 Jan 2026 11:55:00 +0100, Gatien Chevallier wrote: > Stm32 SoCs embed debug peripherals such as Coresight. These peripherals > can monitor the activity of the cores. Because of that, they can be > used only if some features in the debug configuration are enabled. > Else, errors or firewall exceptions can be observed. Similarly to > the ETZPC(on stm32mp1x platforms) or the RIFSC(on stm32mp2x platforms), > debug-related peripherals access can be assessed at bus level to > prevent these issues from happening. > > The debug configuration can only be accessed by the secure world. > That means that a service must be implemented in the secure world for > the kernel to check the firewall configuration. On OpenSTLinux, it is > done through a Debug access PTA in OP-TEE [1]. > To represent the debug peripherals present on a dedicated debug bus, > create a debug bus node in the device tree and the associated driver > that will interact with this PTA. > > [1]: https://github.com/OP-TEE/optee_os/pull/7673 > > Signed-off-by: Gatien Chevallier > --- > Gatien Chevallier (11): > dt-bindings: document access-controllers property for coresight peripherals > dt-bindings: pinctrl: document access-controllers property for stm32 HDP > dt-bindings: bus: document the stm32 debug bus > bus: stm32_firewall: allow check on different firewall controllers > drivers: bus: add the stm32 debug bus driver > arm: dts: stm32: introduce the debug bus for stm32mp1x platforms > arm: dts: stm32: enable the debug bus on stm32mp1x boards > arm: dts: stm32: enable CoreSight on stm32mp15xx-dkx boards > arm: dts: stm32: enable CoreSight on the stm32mp157c-ev1 board > arm: dts: stm32: enable CoreSight on the stm32mp135f-dk board > pinctrl: stm32: add firewall checks before probing the HDP driver > > .../devicetree/bindings/arm/arm,coresight-cti.yaml | 3 + > .../devicetree/bindings/arm/arm,coresight-etm.yaml | 3 + > .../devicetree/bindings/arm/arm,coresight-tmc.yaml | 3 + > .../bindings/arm/arm,coresight-tpiu.yaml | 3 + > .../bindings/bus/st,stm32mp131-dbg-bus.yaml | 86 +++++++ > .../devicetree/bindings/pinctrl/st,stm32-hdp.yaml | 4 + > MAINTAINERS | 1 + > arch/arm/boot/dts/st/stm32mp131.dtsi | 119 +++++++++ > arch/arm/boot/dts/st/stm32mp135f-dk.dts | 24 ++ > arch/arm/boot/dts/st/stm32mp151.dtsi | 173 +++++++++++++ > arch/arm/boot/dts/st/stm32mp153.dtsi | 68 +++++ > arch/arm/boot/dts/st/stm32mp157c-ev1.dts | 40 +++ > arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi | 40 +++ > drivers/bus/Kconfig | 10 + > drivers/bus/Makefile | 1 + > drivers/bus/stm32_dbg_bus.c | 285 +++++++++++++++++++++ > drivers/bus/stm32_firewall.c | 2 +- > drivers/pinctrl/stm32/pinctrl-stm32-hdp.c | 41 +++ > 18 files changed, 905 insertions(+), 1 deletion(-) > --- > base-commit: 9ace4753a5202b02191d54e9fdf7f9e3d02b85eb > change-id: 20260108-debug_bus-392666c7a3aa > > Best regards, > -- > Gatien Chevallier > > > My bot found new DTB warnings on the .dts files added or changed in this series. Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings are fixed by another series. Ultimately, it is up to the platform maintainer whether these warnings are acceptable or not. No need to reply unless the platform maintainer has comments. If you already ran DT checks and didn't see these error(s), then make sure dt-schema is up to date: pip3 install dtschema --upgrade This patch series was applied (using b4) to base: Base: 9ace4753a5202b02191d54e9fdf7f9e3d02b85eb (use --merge-base to override) If this is not the correct base, please add 'base-commit' tag (or use b4 which does this automatically) New warnings running 'make CHECK_DTBS=y for arch/arm/boot/dts/st/' for 20260109-debug_bus-v1-0-8f2142b5a738@foss.st.com: arch/arm/boot/dts/st/stm32mp157c-dk2.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157c-ev1.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157c-dk2.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml arch/arm/boot/dts/st/stm32mp157c-ev1.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml arch/arm/boot/dts/st/stm32mp157a-dk1.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157a-dk1.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml arch/arm/boot/dts/st/stm32mp157f-dk2.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157f-dk2.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml arch/arm/boot/dts/st/stm32mp157a-iot-box.dtb: serial@40010000 (st,stm32h7-uart): False schema does not allow [[44, 15, 1]] from schema $id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml arch/arm/boot/dts/st/stm32mp157a-iot-box.dtb: serial@40010000 (st,stm32h7-uart): False schema does not allow [[45, 0, 1]] from schema $id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml arch/arm/boot/dts/st/stm32mp157a-iot-box.dtb: serial@40010000 (st,stm32h7-uart): False schema does not allow [[44, 15, 1]] from schema $id: http://devicetree.org/schemas/serial/serial.yaml arch/arm/boot/dts/st/stm32mp157a-iot-box.dtb: serial@40010000 (st,stm32h7-uart): False schema does not allow [[45, 0, 1]] from schema $id: http://devicetree.org/schemas/serial/serial.yaml arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dtb: funnel@50091000 (arm,coresight-dynamic-funnel): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-funnel.yaml arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dtb: stm@500a0000 (arm,coresight-stm): Unevaluated properties are not allowed ('access-controllers' was unexpected) from schema $id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml