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Thu, 15 Oct 2026 01:00:59 -0700 (PDT) X-Received: by 2002:a05:622a:586:b0:533:96b4:8dd4 with SMTP id d75a77b69052e-5359f4965eamr358233581cf.1.1792051257010; Thu, 15 Oct 2026 01:00:57 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c3eda044aabsm91788766b.57.2026.10.15.01.00.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 Oct 2026 01:00:55 -0700 (PDT) Message-ID: <9e591ab5-d1f1-4ede-bd0b-ab0241394d4e@oss.qualcomm.com> Date: Thu, 15 Oct 2026 10:00:53 +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 v1 3/4] arm64: dts: qcom: sm8250: Make the ADSP remote heap no-map To: Jianping Li , Bjorn Andersson , Konrad Dybcio Cc: Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Ekansh Gupta , Vinayak Katoch , Alexey Klimov , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, quic_chennak@quicinc.com References: <20261015071511.977-1-jianping.li@oss.qualcomm.com> <20261015071511.977-4-jianping.li@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261015071511.977-4-jianping.li@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=BaVNQbt2 c=1 sm=1 tr=0 ts=6ad0883e cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=CjiZw0He1JKpzbGRn1AA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=uxP6HrT_eTzRwkO_Te1X:22 X-Proofpoint-GUID: 1cRRmT31KnE5E8jqC4CXgtgnIxD9K5WC X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE1MDAzMSBTYWx0ZWRfX8jPFBhagzjzL JbvtUryiTZuJDz2hFuvslizwgryAx/zml46fyv5NRRwBH4qgiNJCY1jzDg7le6oOC1Wg6pLIPnk 3bj28pZAC8OVv4i3lWwOVMM/tatFJAeEe8seJGUAF1SS+6VfmISPL/CQnhh/VhXqJb/eYbi1pJ2 /bz1kfvOt5Wax23Z1MGMG5u4Q1ZYIU9c2+Ex84ISq7ZieWjSscQs8knA29enasFnNtvaFsaN9wX J7vjz1vIiBBW9KQj90CIDEtFDHgkCsMghikzPei/SIF7X91PKUuwgYRnnWvvBXnQ8EW6xJhUwN2 vtiQtIbAB5GT/8VI4lcZWDlNjbijHAbQYm5Db4EGsx+Kkjj+NxAgJMJJ0BRJ70PXks2JBJ8C9y9 uubT3wYS1WxkAThdXCFfEBTt1OyNT2q7O5rT/mADrvycULwD3EIMg8MfzidusSJKVH1j9zrpq6Y +huoPocUAwvgJpCDzAw== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE1MDAzMSBTYWx0ZWRfXy8UQ+NVaBCEO o7nWqbZquuBknafAjGHYeMH/5TFhJplbWXs7jqvF80HmPeM2b40o05dGlj2Oz4E3503Mv1xecye xngfvnaELfdTVZAFg/x6IB3z8MgEQFs= X-Proofpoint-ORIG-GUID: 1cRRmT31KnE5E8jqC4CXgtgnIxD9K5WC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-13_01,2026-10-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 impostorscore=0 malwarescore=0 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610150031 On 10/15/26 9:15 AM, Jianping Li wrote: > The ADSP remote heap is declared as a reusable CMA pool. FastRPC > assigns the entire region to the DSP during probe without allocating > the pages from CMA. This allows movable HLOS allocations to use pages > within the region after HLOS access permissions have been revoked, > potentially causing synchronous external aborts. > > Replace reusable with no-map to prevent the region from being reused > for normal kernel allocations and exclude it from the kernel's > standard memory mapping. > > Fixes: 531ce288b6dd4 ("arm64: dts: qcom: sm8250: Add memory-region for audio PD") > Link: https://lore.kernel.org/all/20260619-sm8250-audio-v1-1-8a76e033e209@oss.qualcomm.com/ > Signed-off-by: Jianping Li > --- Reviewed-by: Konrad Dybcio Konrad