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Thu, 22 Oct 2026 02:27:43 -0700 (PDT) Received: from [10.219.56.252] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cd6b84831d3sm976688a12.10.2026.10.22.02.27.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Oct 2026 02:27:43 -0700 (PDT) Message-ID: <28a4a452-340c-4ac6-afba-5cd39b370ceb@oss.qualcomm.com> Date: Thu, 22 Oct 2026 14:57:38 +0530 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] arm64: dts: qcom: Remove FastRPC compute CB9 entries To: Konrad Dybcio , srinivas.kandagatla@linaro.org, linux-arm-msm@vger.kernel.org Cc: gregkh@linuxfoundation.org, quic_bkumar@quicinc.com, ekansh.gupta@oss.qualcomm.com, linux-kernel@vger.kernel.org, quic_chennak@quicinc.com, dri-devel@lists.freedesktop.org, arnd@arndb.de References: <20261016052042.3755352-1-abhinav.parihar@oss.qualcomm.com> Content-Language: en-US From: Abhinav Parihar In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=JudkP84C c=1 sm=1 tr=0 ts=6ad9d711 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=OuD0wRZ8gfjUqNd7lbQA:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-ORIG-GUID: fqEYx-cp6ItjMqegbBZMfFpAqid1Wnva X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIyMDAzNyBTYWx0ZWRfXxi13LSQxAdLn 7Vg5nnMWwH1mmsjOuBrvjXR1aplKb1ByGfANuhKPq+hOOqxDI/XBKLW9kynBU7i780ZA0rOea5A 0DQkmm/p2J2mxxCmE03VAtatw5vqO6g= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIyMDAzNyBTYWx0ZWRfX4inaYPHm8BAw /13N3hkTjfxl+TmtE1juZckxjuD18fW6bWPa5dLkLtF4Be/VfUzqJla6B8yl5s/rVIq4NhNsC4V +WNmTwgVn0nmfBm+DjzRtG40Kr7WG8dtKrEwiPSspMX0yXTfmgxtk80DTEjuBVt70Sf52hqILwA Ao+zFpQgIObHy3AHsTzbk0yUV6sZRRt/i9uyREhIGdi1+oCRBFZCJ8DyuK6tvFJ9/COgcWRWZVb yB9k2yZyPH8R4IEU3izjkIg2tYJ3x8lB51Vmrgfc8K+vWb2xSASqC6g3MiqUo9WzB5OI9vp7OGY r2RIGqsPS7tYtgZrVOjgFBgCh0INXDmjtpXdcDq+Zzlq/8gFtY/5ShEAAE1vcNUoPb2fyk5P6Ih qGwRP6wi0j32wZlkpwKru0lJ8o/Ixr8dSYtrSjB9PYgD6ub1Gxt2nP3Z+sYG9nu6wKBIoUzUr4Q Xi72mX08F1Yfn+8WY5Q== X-Proofpoint-GUID: fqEYx-cp6ItjMqegbBZMfFpAqid1Wnva X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-22_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 malwarescore=0 impostorscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610220037 On 10/16/2026 2:15 PM, Konrad Dybcio wrote: > On 10/16/26 7:20 AM, Abhinav Parihar wrote: >> Context bank 9 is reserved for secure use cases and must not be exposed >> as a FastRPC compute context bank for non-secure offloading. > The lack of a platform name in the commit message and a split over that > suggests this is a universal truth for all Qualcomm platforms, yet the > patch only limits this to some of those who currently define a cb@9. > > Please make it more clear which one is intended. Ack, patch v2 will have patch series including removal from all platforms having cb@9 >> Remove the compute-cb@9 nodes from the Lemans and Monaco device trees to >> prevent clients from selecting a secure context bank for normal FastRPC >> workloads. >> >> Secure use case support is not currently implemented upstream. > Ordering this sentence before the previous paragraph would make the > commit message read more naturally > > Konrad Ack