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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af91a0a3b6csm2371260366b.48.2025.08.13.03.06.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 Aug 2025 03:07:01 -0700 (PDT) Message-ID: Date: Wed, 13 Aug 2025 12:06:58 +0200 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 v7 07/11] firmware: qcom: tzmem: export shm_bridge create/delete To: Amirreza Zarrabi , Jens Wiklander , Sumit Garg , Bjorn Andersson , Konrad Dybcio , Bartosz Golaszewski , Apurupa Pattapu , Kees Cook , "Gustavo A. R. Silva" , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: Harshal Dev , linux-arm-msm@vger.kernel.org, op-tee@lists.trustedfirmware.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-doc@vger.kernel.org, Neil Armstrong References: <20250812-qcom-tee-using-tee-ss-without-mem-obj-v7-0-ce7a1a774803@oss.qualcomm.com> <20250812-qcom-tee-using-tee-ss-without-mem-obj-v7-7-ce7a1a774803@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250812-qcom-tee-using-tee-ss-without-mem-obj-v7-7-ce7a1a774803@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODExMDA3NCBTYWx0ZWRfXzOhBecuyzZ3c Qa0UgM5ktDY9KLgoSw0j9DB0FJZ/5RgRhFioXIYx6VxP/Q+5jppB+RqnvehMRBgSvgzG1g/c+Rp RRCesvxnA6vn0DIzR1KNrbp865Vy8NhENxaNuVQM+palyMWlVx4phHlmfKDlSgdXGs7QWUJ1+i8 YANTOq4WFSiFnERXwuXc62QUwxmUTZSl4K1S7qz9Jq8L/XHMncaHPtYF8PY+z0THlCJ0jWpEfCL ZqeERg8h2mMDWbN+k9mnJVs6yU/HGja3nUYwQBxXj4r051qIIIdQ9haiVaw4SYFt/TGHtqJkT0M +E+bjI7ZxLQ+3U4VAyRGCfqi6a031L+Jh5U1IVQTv+2tLOENWl30Mgflsjfjo8HIIhkZRO61ytZ wAKQedrU X-Proofpoint-GUID: oDCND0IdVZJw4-R3BfmnR1BFVUJfTWH5 X-Authority-Analysis: v=2.4 cv=TJFFS0la c=1 sm=1 tr=0 ts=689c63c7 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=sWKEhP36mHoA:10 a=KKAkSRfTAAAA:8 a=COk6AnOGAAAA:8 a=EUspDBNiAAAA:8 a=clTIM29CJtwRRT_IFxsA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=uxP6HrT_eTzRwkO_Te1X:22 a=cvBusfyB2V15izCimMoJ:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-ORIG-GUID: oDCND0IdVZJw4-R3BfmnR1BFVUJfTWH5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-12_08,2025-08-11_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 adultscore=0 impostorscore=0 malwarescore=0 phishscore=0 clxscore=1015 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508110074 On 8/13/25 2:35 AM, Amirreza Zarrabi wrote: > Anyone with access to contiguous physical memory should be able to > share memory with QTEE using shm_bridge. > > Tested-by: Neil Armstrong > Tested-by: Harshal Dev > Signed-off-by: Amirreza Zarrabi > --- Hm, I thought the idea for the tzmem allocator was to abstract these operations to prevent users from shooting themselves in the foot, and this seems to be circumventing that.. Konrad