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Thu, 23 Apr 2026 02:58:59 -0700 (PDT) X-Received: by 2002:a17:903:1663:b0:2b2:dca5:101b with SMTP id d9443c01a7336-2b5f9efc3b7mr300413265ad.12.1776938339324; Thu, 23 Apr 2026 02:58:59 -0700 (PDT) Received: from [10.204.79.66] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b5fab3ac1fsm201512955ad.70.2026.04.23.02.58.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 23 Apr 2026 02:58:58 -0700 (PDT) Message-ID: <9d2ba2ba-e560-44ba-98de-fc3d410f9b94@oss.qualcomm.com> Date: Thu, 23 Apr 2026 15:28:53 +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] arm64: dts: qcom: kodiak: avoid EFI overlap for ADSP remote heap To: Konrad Dybcio , Jianping Li , andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, stable@kernel.org References: <20260423063502.484-1-jianping.li@oss.qualcomm.com> <49a3cee4-fcdf-4653-bd54-72db73f80bf0@oss.qualcomm.com> Content-Language: en-US From: Ekansh Gupta In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: PS0pyMWjl7gSXHuKWhfWe_oXRO60lI0- X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIzMDA5NyBTYWx0ZWRfX/36pTrba5VW8 RinTd52q7TXnCj1PBa+R85TUZLkmRvAFzD6+lyk0xuun+sTgMBSVQlcZY0RiO8I/59bY5NIdbCQ 2iR3gZd1KTdFqPPgnujB1diCQZkQMp6Ux065nvsBzIjY6zXxx7YlU996OEeNxjNjuPGH6rLiZTF /MlHfAz9tjSgz9qb6qrDisaGWQXDtVTV5HIxZaQJ0xWf4Jz1Ci3msJq35vKHaGNuU5kbIVX+5aM L/RG82rPImFuadSH4p9xtSBPO4Mupf3kJmMkSy/ry3aS2/piyJpwp+vmoiRdYFMx89H+dSG4FNC waVhZPDVJMiVstlGGSXrgFuAr4Bp3dIrbEE3ceOjIiriLYEKrk19moPPxhjAq8tH50Z+wLIT2Q8 Oz6lbvbt85y2POhJl1yp7XF7GwnQHfFZT95mUkResfu9ngiWqA4yrgBceq0oqs9uZfMv8WXKv9s +K7+6eWb4Xg0LOldKlw== X-Authority-Analysis: v=2.4 cv=UqNT8ewB c=1 sm=1 tr=0 ts=69e9ed65 cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=uz4NEalOebycq88qK4YA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-GUID: PS0pyMWjl7gSXHuKWhfWe_oXRO60lI0- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-23_02,2026-04-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 malwarescore=0 spamscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 lowpriorityscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604230097 On 23-04-2026 14:58, Konrad Dybcio wrote: > On 4/23/26 11:19 AM, Ekansh Gupta wrote: >> On 23-04-2026 14:20, Konrad Dybcio wrote: >>> On 4/23/26 8:35 AM, Jianping Li wrote: >>>> On KODIAK platforms boot can fail when the DT "adsp-rpc-remote-heap" >>>> reserved-memory region overlaps with firmware allocations (UEFI/EFI >>>> runtime). The kernel then reports failure to reserve the region and >>>> subsequent EFI runtime activity may trigger aborts. >>>> >>>> The remote heap node was described as a fixed "no-map" region, which >>>> turns it into a hard carveout. Replace it with a "shared-dma-pool" >>>> reserved memory region with reusable CMA-backed allocation, specifying >>>> alignment and size. >>>> >>>> This avoids hard carveouts and reduces the chance of conflicting with >>>> firmware memory maps while keeping an explicit pool for ADSP remote >>>> heap usage. >>>> >>>> Fixes: 90a58ffa9c55 ("arm64: dts: qcom: kodiak: Add memory region for audiopd") >>>> Cc: stable@kernel.org >>>> Signed-off-by: Jianping Li >>>> --- >>>> arch/arm64/boot/dts/qcom/kodiak.dtsi | 9 ++++++--- >>>> 1 file changed, 6 insertions(+), 3 deletions(-) >>>> >>>> diff --git a/arch/arm64/boot/dts/qcom/kodiak.dtsi b/arch/arm64/boot/dts/qcom/kodiak.dtsi >>>> index 988ca5f7c8a0..420219823496 100644 >>>> --- a/arch/arm64/boot/dts/qcom/kodiak.dtsi >>>> +++ b/arch/arm64/boot/dts/qcom/kodiak.dtsi >>>> @@ -191,9 +191,12 @@ rmtfs_mem: rmtfs@9c900000 { >>>> qcom,vmid = ; >>>> }; >>>> >>>> - adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap@9cb80000 { >>>> - reg = <0x0 0x9cb80000 0x0 0x800000>; >>>> - no-map; >>>> + adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap { >>>> + compatible = "shared-dma-pool"; >>>> + alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>; >>> >>> Since DRAM starts at 0x8000_0000, is it intended to only allow this >>> region to be in the lower 2 gigs? >>> >>> (it may very well be for some historical reasons) >> yes, this is intentional. ADSP supports 32-bit address. > > Okay, so I think this should be one of: > > <0x0 0x80000000 0x0 0x80000000>; SGTM. > > (where we directly specify the DRAM start, which may just be form > over function) > > or: > > <0x0 0x00000000 0x1 0x00000000>; > > to cover 0x0000_0000 - 0xffff_ffff > > Konrad