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Thu, 15 Oct 2026 21:48:35 -0700 (PDT) X-Received: by 2002:a05:7022:b057:10b0:160:a80f:3ed2 with SMTP id a92af1059eb24-16a5dbfecb9mr28022713c88.10.1792126115172; Thu, 15 Oct 2026 21:48:35 -0700 (PDT) Received: from [10.219.56.188] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1831b859142sm2213699c88.18.2026.10.15.21.48.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 Oct 2026 21:48:34 -0700 (PDT) Message-ID: <3c859faf-345a-4ef6-bb61-ff726e4b5d66@oss.qualcomm.com> Date: Fri, 16 Oct 2026 10:18:29 +0530 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 2/4] arm64: dts: qcom: glymur: Make the ADSP remote heap no-map To: Jianping Li , Bjorn Andersson , Konrad Dybcio Cc: Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley , 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> <20261015071511.977-3-jianping.li@oss.qualcomm.com> Content-Language: en-US From: Ekansh Gupta In-Reply-To: <20261015071511.977-3-jianping.li@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: swA-31UW766XzTMOuSLGWzdxfvsXLnQb X-Authority-Analysis: v=2.4 cv=ff04WEQF c=1 sm=1 tr=0 ts=6ad1aca4 cx=c_pps a=SvEPeNj+VMjHSW//kvnxuw==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=WxrJ1OjRqBU2I1o4brwA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=Kq8ClHjjuc5pcCNDwlU0:22 X-Proofpoint-GUID: swA-31UW766XzTMOuSLGWzdxfvsXLnQb X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE2MDAxOCBTYWx0ZWRfX1ig+G5bTUOvL 0O4A4tQ1yCiaNWx/pecODi5JJDfw5MTK2Q6j0jhX6sUoDIZpbFsv00WkM4Idxk2zobiUxIzJcw7 qVWkNrMSBifCP/+yIZ7BltQ10NMMcBzRitOiWqpAofQxbrY0r/5j5qBZ4v2lpYowIg+LNAVVXxQ DizGaoWttBtggFByuxa5kHvdBsAlcr0tApsvhsMFYUbwTwriBkh0ylLOfXVqpYrikJTbyLz13Gc YD3uVIcX1g+5nDDmaj0lGHVe05jagA8tJpOhHsWj3F1n3vPo6IIuGwNnrxVolr/CC0WspKMfEaB u17CYGEXUTnRe5wRuzjCWtZTBVhN0Xj3nLT8vIzZU+3xxUNAWWe7Um4rHnewE40FMQKqL4Q5vU2 Mc9Tz3uZ6c+PTbCfn0adTeWaTQ0lsvsWuiLrvkKpI5H3lydQQ6FSBBdVJMeR5mPjBB5GEKNomPd hMuObmfm55E7+3F5i/w== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE2MDAxOCBTYWx0ZWRfXwWpAt/q68r+R 356aJb2eER7QBhQfiq7s3WtQQ/jO3850/T0B5Hob9OLgSjo2N4aBj6SOZC2r+tjL3jwAonBG4YS HW/AnUo/UkMcydaOvrU0LZ7aXwZjMRg= 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=2026-10-14_01,2026-10-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=0 priorityscore=1501 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610160018 On 15-10-2026 12:45, Jianping Li wrote: > The ADSP remote heap is declared as a reusable shared DMA pool. > Allowing the kernel to reuse this region is incompatible with handing > the entire region over to the DSP, as HLOS allocations may then access > memory for which HLOS no longer has access permissions. > > The same configuration has caused synchronous external aborts on > other platforms when the kernel accesses pages within the ADSP remote > heap. > > Replace reusable with no-map to keep the region reserved for the DSP > and exclude it from the kernel's standard memory mapping. > > Fixes: 67641246eabd0 ("arm64: dts: qcom: glymur: Add memory-region for audio PD") > Link: https://lore.kernel.org/all/20260701-glymur-audio- > v1-1-2c3862d95a09@oss.qualcomm.com/ > Signed-off-by: Jianping Li Reviewed-by: Ekansh Gupta