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Wed, 14 Oct 2026 02:10:51 -0700 (PDT) X-Received: by 2002:a17:90b:3b90:b0:3a8:5543:5572 with SMTP id 98e67ed59e1d1-3ab3a3654admr13949521a91.1.1791969050687; Wed, 14 Oct 2026 02:10:50 -0700 (PDT) Received: from [10.219.56.188] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3ac6069ca15sm3642624a91.11.2026.10.14.02.10.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 14 Oct 2026 02:10:50 -0700 (PDT) Message-ID: Date: Wed, 14 Oct 2026 14:40:45 +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] arm64: dts: qcom: talos: Make the ADSP remote heap no-map To: Jianping Li , Bjorn Andersson , Konrad Dybcio Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, quic_chennak@quicinc.com References: <20261014083820.468-1-jianping.li@oss.qualcomm.com> Content-Language: en-US From: Ekansh Gupta In-Reply-To: <20261014083820.468-1-jianping.li@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE0MDAzNiBTYWx0ZWRfXy17qZeG9l2S2 o5lLpX44DvZT5or+zIBPcqqdkj0oVZGGiKZAy9QwraaYLfFkU0y+xA0li+8X9862vftsYcxAtbC qttWlo7s+ELqjCO376l3K0dr2CwyZHQ= X-Proofpoint-GUID: 1PLN7faaU-VDGyczxryJ0xIjPwbOFoMT X-Authority-Analysis: v=2.4 cv=Y6ttIReN c=1 sm=1 tr=0 ts=6acf471c cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=wpYJVS7NxIkf_1e-v7wA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE0MDAzNiBTYWx0ZWRfXyVesH3vGcI+u mYdD/QRWgtk1BDUYU9WgohFqNbVjPScbL6wND8/L5+Cts1sWZo9vAZW9saqbTcNL7xhNnHJpUhR CxWHH7Iv4d0NkTyDIhEKZqKoY7PAy52ytagKBJzpXgP3WrNPU4h3FYqokePcuy3sc8Dgy8Bx/5n x2k4P01mWYfYQ1qQ6uD9XVozCk9zV4R0ooXRB1gkfNFd57oHdnQ7VZTGQxRGMAwRN/eMcl1VKue BoV9kvc7fG6/dDUGXB5/VQ9A6sIUtx5f/Ltv23EXvH7VI9/+MlN+EyDpW4wZBhXE0xEoMYhEWtW fHBR77h3xtVmN4hQ1GwG2C2+DaMfBActcR0YAuv0NkYnJiGC9NnPotNQ/XoHh3M3SyVfqAvDQk4 BgXQHVX1msZCSHo7ZLA3l45ITMp82lV5Z3Uoazj5KBBaaIwHmoCd2ErfnQw9yJU8pT1ml+w6M8n R377Qnu5wbZFYOlDkfw== X-Proofpoint-ORIG-GUID: 1PLN7faaU-VDGyczxryJ0xIjPwbOFoMT 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_01,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 adultscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 spamscore=0 suspectscore=0 bulkscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610140036 On 14-10-2026 14:08, Jianping Li wrote: > The ADSP remote heap is declared as a reusable CMA pool. FastRPC > assigns the entire region to the DSP through qcom_scm_assign_mem() > during probe without allocating the pages from CMA. Consequently, > the pages remain available for movable HLOS allocations even after > HLOS access to the region has been revoked. > > On Talos, GPU stress testing triggers a synchronous external abort > when zram accesses pages within the ADSP remote heap. > > 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: b0b51a5f1911f ("arm64: dts: qcom: talos: Add memory-region for audio PD") > Link: https://lore.kernel.org/all/20260424-talosaudio-v3-1-9e2ad5d78a2e@oss.qualcomm.com/ > Signed-off-by: Jianping Li > --- > arch/arm64/boot/dts/qcom/talos.dtsi | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi > index 8ed6f2755705..b14952b57d6a 100644 > --- a/arch/arm64/boot/dts/qcom/talos.dtsi > +++ b/arch/arm64/boot/dts/qcom/talos.dtsi > @@ -682,7 +682,7 @@ pil_gpu_mem: pil-gpu@97715000 { > adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap { > compatible = "shared-dma-pool"; > alloc-ranges = <0x0 0x80000000 0x0 0x80000000>; > - reusable; > + no-map; > alignment = <0x0 0x400000>; > size = <0x0 0x800000>; > }; Reviewed-by: Ekansh Gupta