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Mon, 04 May 2026 03:03:20 -0700 (PDT) X-Received: by 2002:a05:6a20:3d11:b0:3a1:76d3:c1b0 with SMTP id adf61e73a8af0-3a7f1cb3fc7mr9308931637.22.1777889000200; Mon, 04 May 2026 03:03:20 -0700 (PDT) Received: from [10.217.223.121] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c7ffbba8fefsm8933909a12.7.2026.05.04.03.03.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 May 2026 03:03:19 -0700 (PDT) Message-ID: Date: Mon, 4 May 2026 15:33:06 +0530 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 04/15] firmware: qcom: Add a PAS TEE 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 , Bjorn Andersson , Konrad Dybcio References: <20260427095603.1157963-1-sumit.garg@kernel.org> <20260427095603.1157963-5-sumit.garg@kernel.org> Content-Language: en-US From: Harshal Dev In-Reply-To: <20260427095603.1157963-5-sumit.garg@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA0MDEwNiBTYWx0ZWRfX74AgMriLZO+2 h/OJCx+OZKyFDoqCgyGVxrdBz/DD1KpHruzQDCwO7/U+kp690cC9YXfqyso+ss8URLzHYwiiokz ZpSqEB+iy4p8A8QwOIU6i5NNj+OjzODOpc+D+VSWe7Zfk/S/32WqRALOeVdxoGNKpmYJLuim0N7 XMHjs8qP81NKxIoDaFDnL5+h08xI8YBPtJKdGal3aXIDvyEJHNGkjymlGnSKOfiiMUpLdCe0q7Q SdUPokXkBjd+dD9JBQDj1eqq2kuTFKzwpe0CE7YcTGmfDNN1aHc0KvwHSKr5olrR0u9EkzT7QrA 7F8tazsYuHUz0bFidx2dDQY6EeidufzHpFwsr0Hv5CVaWtyUVA04/Cn1BVQ7sgEVobEGy23VeIg GGb3Z4fcbSGV+0ecA8jC+PwkhnmddgYlkyCjOGvpEcif2zmZzhjCR2b7ucMlyNw+GAn8fDL+kTQ ATg3vPbB/J1rRT0uO0Q== X-Proofpoint-GUID: mm2FpKarZ_sguck_82wx_mjuIdtXxOeP X-Authority-Analysis: v=2.4 cv=bb5bluPB c=1 sm=1 tr=0 ts=69f86ee9 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=P-IC7800AAAA:8 a=EUspDBNiAAAA:8 a=6olnGIjaqZ5DSDVW89IA:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 a=d3PnA9EDa4IxuAV0gXij:22 X-Proofpoint-ORIG-GUID: mm2FpKarZ_sguck_82wx_mjuIdtXxOeP 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 malwarescore=0 suspectscore=0 priorityscore=1501 bulkscore=0 adultscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040106 Hi Sumit, On 4/27/2026 3:25 PM, Sumit Garg via OP-TEE wrote: > From: Sumit Garg > > Add support for Peripheral Authentication Service (PAS) driver based > on TEE bus with OP-TEE providing the backend PAS service implementation. > > The TEE PAS service ABI is designed to be extensible with additional API > as PTA_QCOM_PAS_CAPABILITIES. This allows to accommodate any future > extensions of the PAS service needed while still maintaining backwards > compatibility. > > Signed-off-by: Sumit Garg > --- > drivers/firmware/qcom/Kconfig | 10 + > drivers/firmware/qcom/Makefile | 1 + > drivers/firmware/qcom/qcom_pas_tee.c | 479 +++++++++++++++++++++++++++ > 3 files changed, 490 insertions(+) > create mode 100644 drivers/firmware/qcom/qcom_pas_tee.c [...] > diff --git a/drivers/firmware/qcom/qcom_pas_tee.c b/drivers/firmware/qcom/qcom_pas_tee.c > +static int qcom_pas_tee_mem_setup(struct device *dev, u32 pas_id, > + phys_addr_t addr, phys_addr_t size) > +{ [...] > + > + ret = tee_client_invoke_func(data->ctx, &inv_arg, param); > + if (ret < 0 || inv_arg.ret != 0) { > + dev_err(dev, "PAS mem setup failed, pas_id: %d, ret: %d, err: 0x%x\n", > + pas_id, ret, inv_arg.ret); > + return ret ?: -EINVAL; Following the example from qcom_scm_pas_mem_setup() here: https://elixir.bootlin.com/linux/v7.0.1/source/drivers/firmware/qcom/qcom_scm.c#L778 I think it should be: return ret ?: inv_arg.ret; This way the client (say mdt_loader) knows what error OPTEE PAS service returned. I can see that is tries to print this error: https://elixir.bootlin.com/linux/v7.0.1/source/drivers/soc/qcom/mdt_loader.c#L286 With that, Reviewed-by: Harshal Dev Regards, Harshal