From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 0E0C137703B for ; Mon, 4 May 2026 09:20:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777886428; cv=none; b=TjjHkGcGD0cBiH8iJ14XKapkRT7Js0fgzLrfKnt/iKrTAQ6gin3S3AOr3tdT+XgqfqZrJMkwHFGMXltvvcXEWOpbzSySGwk048jvjWz4lLwBRVzkvmWDuPfLriWL2SV7sKrZHEx4T6HF5etoIsfiK9MfH7G/kbhGLPtSh43W85w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777886428; c=relaxed/simple; bh=oQ9eG6ob+yWY+piBXjP6NuGOsypMkng4SMTY/pziYx0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=MMQGSkPgYm+QOCa1VBPUFS+h0+rEiQfRZIkgQpINAgVHUx51ut0Gcgm3j/3qzWa99ln4LFHr1zY/KQ4Nb4bqKbs2KVpRK0PCV5LJS5fuJZL/Yjyj7d0pJ8OKBKp/+l4jf+qXebBlCf+hWikqWYkGWRbLbHY48HcYjmI29NLWsf0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=DP0rHUCc; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=Mdw8BrzG; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="DP0rHUCc"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="Mdw8BrzG" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 6448fd4Y487122 for ; Mon, 4 May 2026 09:20:26 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= xacEJq2Zps3FgavLd4lLbebjwrUmMkWW1Dnv6tEkWBA=; b=DP0rHUCcKYKrOTU6 4+YLLRO47dTK0k95xf1aJjr/zEC1BeU1ZmwbVwTfk2Ye9TPn12j56h1pFtCLQAC4 KhYDjPtN01UugvozyOjlVSyzEjIoYB66OLruaOmkbrdsR/a9Vhg6Hi2FJsXBmucu yDxrMsQbSShgrYKrMJJeQ4yyShtgpm3+qErJTb2VGDsfat2kLJkr6Z+Z4OUiUPN2 vqKlDgQNzX0Elz9mtysDKTIQ37s/uUxNiXnIutHnNZxaKu5x8xAVTDGN4r3tpeb0 QZqvOgpCO2l4LK6eoDpj4XlHxYa3zhG6bviZdFoj+kWClXiGFA/uAZT9PvhmihHE XA/PQw== Received: from mail-pf1-f198.google.com (mail-pf1-f198.google.com [209.85.210.198]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4dw8uxn3r7-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 04 May 2026 09:20:25 +0000 (GMT) Received: by mail-pf1-f198.google.com with SMTP id d2e1a72fcca58-82f74bcfb86so4520632b3a.0 for ; Mon, 04 May 2026 02:20:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1777886425; x=1778491225; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=xacEJq2Zps3FgavLd4lLbebjwrUmMkWW1Dnv6tEkWBA=; b=Mdw8BrzGccVYD4tcjPgaLhNUkC+ofpzKlT7w/iGeJzV+ny9wzGeujkRpsiafQ2VwWV KVg5zc8Kci/digbulVY4K7oh5hseXoR5ApmBSraeaazgFPYw3nqrUCu9OMj3Vjf/0YV1 5rU3tJ6QNRONqq4lUcGpDefC8W/9hforfPzYQ3wbXyJq4T0LNk4gHUAte1VUQ0WhB2QJ sAo4nVoi3lxcnTgDbt3bUUHv/eCwXBhIh+1qa9FCGzoapquZ/JGUlhC4bGzDl4VmyMlh Yet+BA7akKoj6O5zRPABCU7uhg4uh5NMmteoDy1jSq+XOksM8Hsuh3WAaRuYjyxL9MRF XEwA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777886425; x=1778491225; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=xacEJq2Zps3FgavLd4lLbebjwrUmMkWW1Dnv6tEkWBA=; b=MYZsPOPZ5BG55+gL8fDY6MyJWaUhdhK0bC3DueWcPozrHeOMIA+NIOTPMopqgFyai/ sGJ0nYcIPyotka/Zsj9knRBcZmwKz2nXDitgE96j9Vr+2LCMyVWs5DRq7FWorH6OrXW2 lbMeqwWSe5Dn36HM66zxzUEHOtWgX2DS8T6PsIV9SYex+SG/d3vM/ytm8ycSLaNA/h6X HJVdYyCdUROfhvZd4uYVr/C51JCpg20tXGbmYLKEDCk7LzzJnGtN6LtbhvnEoOm7ZBi4 QosVGN1VoXBl19aOG7i6brtqgt46cy9mSPbtDzIFDeD6Vvk6iPqu3r6rsmMaf1a9X979 CKmA== X-Forwarded-Encrypted: i=1; AFNElJ96T5CRmMI1nLoid6dM2Bpd/0BL5TbWNbvmRi6J70mG/ntJsWUzWr82LdeNzDdf0lNIec+G7FvRZwVQ@vger.kernel.org X-Gm-Message-State: AOJu0YypX+AIxNjrYGAwhyubEWOjN539+dCqXSVBJSCsgc8mBrcd0YAR 1JrZ0izRkTVh/hxSVRgZX2CfdXf40hTO9nmjKeDxOuVo8Xlb1racf60P2M1xP3m36ZPHIgOd1W7 Elv24fwM3wps2IXjtPZJdQRYwLiIBrlwVpNMGFauSa6jZKRZjQZWA7FFLtdhGT8S3 X-Gm-Gg: AeBDieuajK7hN00JiNfg2S+gCV76waotSlKxtyPM/qcyvmZdo3GUN9/UMTtYks06jEK HSYHeKMbQHNBe9gnXLX9BUldcXZEOW9Bnmik+ep7FvO0anZAOSDamWmPJWMvPQ0T1NmlRDisWxh /f9BoTG7uAEMC31ESDyG2SIlz1WZsTRrTwzP60O3S0Nx7Sm3oL8ScgYGMPYUrcxPSLQevZVa7Do yMyfqknIIMhdeRh993Ek2ERtghnIj0cmi2Gyua6vbuthwfm/UkUg7JclBPdQwrUfYypgx+bv5/U xSxsrNqScQSzUG81OgYcfNIDwSd3q8l3f8NPV9sJVo3loggFYUrlcCGTL3fq7YnejgbWcJrMliR rfGay9K/nx7e5NjeNZhXd8zubjwiRfYX97tnbysWH2sKuNlT4nJhGedesjm9GnA== X-Received: by 2002:aa7:9f07:0:b0:835:388c:9764 with SMTP id d2e1a72fcca58-835388ca073mr4931623b3a.37.1777886425043; Mon, 04 May 2026 02:20:25 -0700 (PDT) X-Received: by 2002:aa7:9f07:0:b0:835:388c:9764 with SMTP id d2e1a72fcca58-835388ca073mr4931557b3a.37.1777886424440; Mon, 04 May 2026 02:20:24 -0700 (PDT) Received: from [10.217.223.121] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-83515ad0049sm12316337b3a.33.2026.05.04.02.20.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 May 2026 02:20:24 -0700 (PDT) Message-ID: <81d83991-df25-4fc4-8261-6793ea9dc438@oss.qualcomm.com> Date: Mon, 4 May 2026 14:50:10 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 02/15] firmware: qcom: Add a generic PAS service To: Sumit Garg Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-media@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-remoteproc@vger.kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, robin.clark@oss.qualcomm.com, sean@poorly.run, akhilpo@oss.qualcomm.com, lumag@kernel.org, abhinav.kumar@linux.dev, jesszhan0024@gmail.com, marijn.suijten@somainline.org, airlied@gmail.com, simona@ffwll.ch, vikash.garodia@oss.qualcomm.com, dikshita.agarwal@oss.qualcomm.com, bod@kernel.org, mchehab@kernel.org, elder@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jjohnson@kernel.org, mathieu.poirier@linaro.org, trilokkumar.soni@oss.qualcomm.com, mukesh.ojha@oss.qualcomm.com, pavan.kondeti@oss.qualcomm.com, jorge.ramirez@oss.qualcomm.com, tonyh@qti.qualcomm.com, vignesh.viswanathan@oss.qualcomm.com, srinivas.kandagatla@oss.qualcomm.com, amirreza.zarrabi@oss.qualcomm.com, op-tee@lists.trustedfirmware.org, apurupa@qti.qualcomm.com, skare@qti.qualcomm.com, linux-kernel@vger.kernel.org, Sumit Garg , Konrad Dybcio , Bjorn Andersson References: <20260427095603.1157963-1-sumit.garg@kernel.org> <20260427095603.1157963-3-sumit.garg@kernel.org> Content-Language: en-US From: Harshal Dev In-Reply-To: <20260427095603.1157963-3-sumit.garg@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: VTklZj7rXutjSZNGcUzN7NMCIP-ws31m X-Authority-Analysis: v=2.4 cv=QqxuG1yd c=1 sm=1 tr=0 ts=69f864da cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=DWWpLck2SfFL7czMIZ0A:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-GUID: VTklZj7rXutjSZNGcUzN7NMCIP-ws31m X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA0MDA5OSBTYWx0ZWRfXxnuW4FML+Fp6 y8asjXeZLlhek32K9O8xPmSfHbKfuBboLKOWAt30Pe9p+748xdvBwzaoR0YCY2zhL++fFAJoDXb tTD/+KAj/5T3omMJxfXpSPplKx0OvLzWWJCWIqK7syVQrA/MbA4ztcUhld+uoNQGjSvmcsfXBVr H3uvzVELZVSCfudogC4TMQZLYq6AEFGVmtqPZg96WWHoMiUhSd0lbqjBjYLReRFPX7uJDMEJWwT h9tORtSnxo2s5fNmw+VNyYYdEtdY/gXf+6z684nXCIA/ZeJkeGmq4V4oqjMQSlLPiMiZ4JjgYYJ CLyBjH0sFIYsX6qy6lPPwyFq4POVno6nPd37G9gjiR8Q/jNc6vk8ObLkm+VFlIWVfA9MmRJa+lr xx7tbKFffmODYK4hGT7xwXLVOwH+VOXGwaEV3kaKmp+vm2+z20WoSPRAYp7l+T++mdObZ1ol8uR VwvQnJptBmWWqJCp0dg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-04_03,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 suspectscore=0 clxscore=1015 phishscore=0 priorityscore=1501 malwarescore=0 spamscore=0 adultscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040099 On 4/27/2026 3:25 PM, Sumit Garg via OP-TEE wrote: > From: Sumit Garg > > Qcom platforms has the legacy of using non-standard SCM calls > splintered over the various kernel drivers. These SCM calls aren't > compliant with the standard SMC calling conventions which is a > prerequisite to enable migration to the FF-A specifications from Arm. > > OP-TEE as an alternative trusted OS to Qualcomm TEE (QTEE) can't > support these non-standard SCM calls. And even for newer architectures > using S-EL2 with Hafnium support, QTEE won't be able to support SCM > calls either with FF-A requirements coming in. And with both OP-TEE > and QTEE drivers well integrated in the TEE subsystem, it makes further > sense to reuse the TEE bus client drivers infrastructure. > > The added benefit of TEE bus infrastructure is that there is support > for discoverable/enumerable services. With that client drivers don't > have to manually invoke a special SCM call to know the service status. > > So enable the generic Peripheral Authentication Service (PAS) provided > by the firmware. It acts as the common layer with different TZ > backends plugged in whether it's an SCM implementation or a proper > TEE bus based PAS service implementation. > > Signed-off-by: Sumit Garg > --- Reviewed-by: Harshal Dev Regards, Harshal