From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.mainlining.org (mail.mainlining.org [5.75.144.95]) (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 8571F3491D5; Fri, 21 Nov 2025 12:13:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=5.75.144.95 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763727223; cv=none; b=Qc+BN5YBu5sNFyrk9nO/aoi5fPrSNRvk53u5C2YRSTOdr6UWgbOHvWbKTS9x9i5KyKUhMz5Ew7EGqsXq4LWTABaIryyF1efJBfgbPGYOjFImPu2cqtCUOlc2UeTz81i5OgLZUtS5Ql8bKtn75ukR+CHe6NRipaDg3eC6E4G+c8w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763727223; c=relaxed/simple; bh=H35SWhia7AAytWR4jRFnbSMEP8FXb18hqHkhDE5d5bE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fETfDIif0jfhXfDhhSn9C9bc1wgXx8w3KO/aDMEA5M9t30ElmRo1NqLkkvNxeODnf/sExj6eqvBw8h5gnfmLMMHk5BvoXEo1RDViWUN8gqVXEFYcy24If2OkArSew/BVrfj/HCds3qPE+eD4tLXH8WDpIL1A56Y1acNsdYr7KDA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mainlining.org; spf=pass smtp.mailfrom=mainlining.org; dkim=pass (2048-bit key) header.d=mainlining.org header.i=@mainlining.org header.b=AlGpNY9v; dkim=permerror (0-bit key) header.d=mainlining.org header.i=@mainlining.org header.b=9lOrZcRE; arc=none smtp.client-ip=5.75.144.95 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mainlining.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mainlining.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mainlining.org header.i=@mainlining.org header.b="AlGpNY9v"; dkim=permerror (0-bit key) header.d=mainlining.org header.i=@mainlining.org header.b="9lOrZcRE" DKIM-Signature: v=1; a=rsa-sha256; s=202507r; d=mainlining.org; c=relaxed/relaxed; h=From:To:Subject:Date:Message-ID; t=1763727191; bh=uXAawLauHqZfOJlMubFCzxe zUFUJfMoZtDOE8XI82oU=; b=AlGpNY9vtGbdiffH544O3W7CqnXXV7E0saNH62NCNATDjgWcvD 8A4B5l5HU4jx7SbWxEF8xGwEjDX4rEWmoTvXUcP5pi+ces1xfDjKp6Kscb6GYMSlsXU+gVcw/ay gVkVo2aBb+rLShbdPpy7GiBYSuIKtjfUJX4LG7nu3+4SHlNMTINbNnrEgeQTjgKv/rFSlvy9Ocg oqd4BPuWoNZpoFcFexjZzYaLtnseLlffVRcQiOaszjyQabUQpKNEgtOrxwpCpP8TgIAG9lvYbZx TlrdQbyn3Kc5bQ1E3ivO19oseFF6MTX1gESYBEKeaGZhZSYjTbb31GJFj7Yq8ItP7BA==; DKIM-Signature: v=1; a=ed25519-sha256; s=202507e; d=mainlining.org; c=relaxed/relaxed; h=From:To:Subject:Date:Message-ID; t=1763727191; bh=uXAawLauHqZfOJlMubFCzxe zUFUJfMoZtDOE8XI82oU=; b=9lOrZcRE6DDf7ZsS/mEKZ+oOYp4btGlNAQekWrqPFWEtgOtX/k vj3UMWpQ2qLumH06Lmycrqfwx6f2z/A0b7Dg==; Message-ID: <23798422-52cf-4010-a2af-94be8a3a4481@mainlining.org> Date: Fri, 21 Nov 2025 15:13:10 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/3] arm64: dts: qcom: sdm630/660: Add CDSP-related nodes To: Dmitry Baryshkov Cc: Ekansh Gupta , Konrad Dybcio , Srinivas Kandagatla , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, linux@mainlining.org, Chenna Kesava Raju , Bharath Kumar References: <83c3aea5-764e-4e60-8b16-67b474f19357@oss.qualcomm.com> <80836b8f-16a8-4520-ad11-5ca0abb3403e@oss.qualcomm.com> <99c22e73-797c-4a30-92ba-bc3bd8cf70f0@oss.qualcomm.com> <0b06f744-b695-43d9-8da3-4424e2b53a5e@oss.qualcomm.com> <24221ce7-24e4-4eaa-8681-ed9b4b9f2d6e@oss.qualcomm.com> <975b468f-e5fc-40df-a9b6-2630f6ed99cc@mainlining.org> Content-Language: ru-RU, en-US From: Nickolay Goppen In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 21.11.2025 15:11, Dmitry Baryshkov пишет: > On Fri, Nov 21, 2025 at 11:18:31AM +0300, Nickolay Goppen wrote: >> 21.11.2025 11:11, Ekansh Gupta пишет: >>> On 11/20/2025 5:17 PM, Konrad Dybcio wrote: >>>> On 11/20/25 11:54 AM, Ekansh Gupta wrote: >>>>> On 11/20/2025 1:27 PM, Nickolay Goppen wrote: >>>>>> 20.11.2025 07:55, Ekansh Gupta пишет: >>>>>>> On 11/20/2025 1:58 AM, Srinivas Kandagatla wrote: >>>>>>>> On 11/12/25 1:52 PM, Konrad Dybcio wrote: >>>>>>>>> On 11/10/25 6:41 PM, Srinivas Kandagatla wrote: >>>>>>>>>> On 11/3/25 12:52 PM, Konrad Dybcio wrote: >>>>>>>>>>> On 10/31/25 12:30 PM, Nickolay Goppen wrote: >>>>>>>>>>>> 24.10.2025 16:58, Nickolay Goppen пишет: >>>>>>>>>>>>> 24.10.2025 11:28, Konrad Dybcio пишет: >>>>>>>>>>>>>> On 10/23/25 9:51 PM, Nickolay Goppen wrote: >>>>>>>>>>>>>>> In order to enable CDSP support for SDM660 SoC: >>>>>>>>>>>>>>>    * add shared memory p2p nodes for CDSP >>>>>>>>>>>>>>>    * add CDSP-specific smmu node >>>>>>>>>>>>>>>    * add CDSP peripheral image loader node >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> Memory region for CDSP in SDM660 occupies the same spot as >>>>>>>>>>>>>>> TZ buffer mem defined in sdm630.dtsi (which does not have CDSP). >>>>>>>>>>>>>>> In sdm660.dtsi replace buffer_mem inherited from SDM630 with >>>>>>>>>>>>>>> cdsp_region, which is also larger in size. >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> SDM636 also doesn't have CDSP, so remove inherited from sdm660.dtsi >>>>>>>>>>>>>>> related nodes and add buffer_mem back. >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> Signed-off-by: Nickolay Goppen >>>>>>>>>>>>>>> --- >>>>>>>>>>>>>> [...] >>>>>>>>>>>>>> >>>>>>>>>>>>>>> +            label = "turing"; >>>>>>>>>>>>>> "cdsp" >>>>>>>>>>>>> Ok, I'll change this in the next revision. >>>>>>>>>>>>>>> +            mboxes = <&apcs_glb 29>; >>>>>>>>>>>>>>> +            qcom,remote-pid = <5>; >>>>>>>>>>>>>>> + >>>>>>>>>>>>>>> +            fastrpc { >>>>>>>>>>>>>>> +                compatible = "qcom,fastrpc"; >>>>>>>>>>>>>>> +                qcom,glink-channels = "fastrpcglink-apps-dsp"; >>>>>>>>>>>>>>> +                label = "cdsp"; >>>>>>>>>>>>>>> +                qcom,non-secure-domain; >>>>>>>>>>>>>> This shouldn't matter, both a secure and a non-secure device is >>>>>>>>>>>>>> created for CDSP >>>>>>>>>>>>> I've added this property, because it is used in other SoC's, such as SDM845 and SM6115 for both ADSP and CDSP >>>>>>>>>>>> Is this property not neccessary anymore? >>>>>>>>>>> +Srini? >>>>>>>>>> That is true, we do not require this for CDSP, as CDSP allows both >>>>>>>>>> unsigned and signed loading, we create both secured and non-secure node >>>>>>>>>> by default. May be we can provide that clarity in yaml bindings so that >>>>>>>>>> it gets caught during dtb checks. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> However in ADSP case, we only support singed modules, due to historical >>>>>>>>>> reasons how this driver evolved over years, we have this flag to allow >>>>>>>>>> compatiblity for such users. >>>>>>>>> Does that mean that we can only load signed modules on the ADSP, but >>>>>>>>> the driver behavior was previously such that unsigned modules were >>>>>>>>> allowed (which was presumably fine on devboards, but not on fused >>>>>>>>> devices)? >>>>>>>> Yes, its true that we allowed full access to adsp device nodes when we >>>>>>>> first started upstreaming fastrpc driver. >>>>>>>> >>>>>>>> irrespective of the board only signed modules are supported on the ADSP. >>>>>>>> I think there was one version of SoC i think 8016 or some older one >>>>>>>> which had adsp with hvx which can load unsigned modules for compute >>>>>>>> usecase only. >>>>>>>> >>>>>>>> I have added @Ekansh for more clarity. >>>>>>>> >>>>>>>> --srini >>>>>>> For all the available platforms, ADSP supports only signed modules. Unsigned >>>>>>> modules(as well as signed) are supported by CDSP and GDSP subsystems. >>>>>>> >>>>>>> qcom,non-secure-domain property marks the corresponding DSP as non-secure DSP. >>>>>>> The implications of adding this property would be the following: >>>>>>> on ADSP, SDSP, MDSP: >>>>>>> - Only non-secure device node(/dev/fastrpc-Xdsp) is created. >>>>>>> - Non-secure device node can be used for signed DSP PD offload. >>>>>>> >>>>>>> on CDSP, GDSP: >>>>>>> - Both secure(/dev/fastrpc-Xdsp-secure) and non-secure(/dev/fastrpc-Xdsp) devices >>>>>>>    are created, regardless of this property. >>>>>>> - Both the nodes can be used for signed and unsigned DSP PD offload. >>>>>>> >>>>>>> Note: If the property is not added for CDSP/GDSP, only secure device node can >>>>>>> be used for signed PD offload, if non-secure device is used, the request gets >>>>>>> rejected[1]. >>>>>>> >>>>>>> [1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/misc/fastrpc.c#n1245 >>>>>>> >>>>>>> //Ekansh >>>>>> Does this mean that the qcom,non-secure-domain property should be dropped from both nodes? >>>>> I checked again and found that unsigned module support for CDSP is >>>>> not available on this platform. Given this, the safest approach would >>>>> be to add the property for both ADSP and CDSP, ensuring that all >>>>> created device nodes can be used for signed PD offload. I can provide >>>> The property allows *unsigned* PD offload though >>> I don't think I can directly relate this property to unsigned PD offload. This is just >>> defining what type of device node will be created and whether the channel is secure >>> or not. There is a possibility of making unsigned PD request(on CDSP/GDSP) irrespective >>> of whether this property is added or not. If DSP does not support unsigned offload, it >>> should return failures for such requests. >>>>> a more definitive recommendation once I know the specific use cases >>>>> you plan to run. >>>> Why would the usecase affect this? >>> I'm saying this as per past discussions where some application was relying on non-secure >>> device node on some old platform(on postmarketOS)[1] and having this property in place. >>> So if similar usecase is being enabled here, the property might be required[1]. >> I'm testing these changes on postmarketOS. However, sensors aren't working >> through FastRPC on sdm660. > How? Could you mention, what exactly doesn't work? I meant that smgr doesn't use the FastRPC >> Is it better to leave this property for both nodes? >> >>> [1] https://lkml.org/lkml/2024/8/15/117 >>>> Konrad >> -- >> Best regards, >> Nickolay >> -- Best regards, Nickolay