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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-668cf4f8827sm3796627a12.2.2026.03.23.05.38.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2026 05:38:22 -0700 (PDT) Message-ID: <62242f73-161b-4bf6-bb66-3775b7755971@oss.qualcomm.com> Date: Mon, 23 Mar 2026 13:38:19 +0100 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 1/3] arm64: dts: qcom: milos: Reduce rmtfs_mem size to 2.5MiB To: Luca Weiss , Alexander Koskovich , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kees Cook , Tony Luck , "Guilherme G. Piccoli" Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260321-asteroids-v1-0-4b902901cb49@pm.me> <20260321-asteroids-v1-1-4b902901cb49@pm.me> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=fKc0HJae c=1 sm=1 tr=0 ts=69c13441 cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=W6naqKN7AAAA:8 a=EUspDBNiAAAA:8 a=Jnoa2UoM1I-2u1HpP8gA:9 a=QEXdDO2ut3YA:10 a=dawVfQjAaf238kedN5IG:22 a=Xp8b5NkTPdl8jt_qJiRs:22 X-Proofpoint-GUID: C0RHJo_RKBeDPDMkpPPHSTXznQ55Fjti X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIzMDA5OCBTYWx0ZWRfX11Xa2PqTySjY axAh2tyekt0YqI0Sblt8N0Vcuk57aHqGLAJPpPEJ+yNNuZf9J8CtCtkl/8v148K0RtPTuSr7Xm/ P2KbFdaty6E+/vrHPr4spJAHCO/lDOwN5m0uB/F5OlaVieldNlhcrkUeqWtpzLDeQfbJI7OhA+x pOvvIcPEihrgxMaavFCPI+q4X2QgXaCiBUeTNcFJtSO2+xN5s4ZsLuGRQzK4u9Vld3yNRW173Yg VRdlrT2wyTq+kblhnCn/gRjz0DGb+8QxnfmIjJOmibRuoNPt4gav0UyEwLc/Ta5jCYWQry+henA wqFfc4HoKWYUnyZ9Ro0WZJgdSdaEpvwLDoze1JKGk457ef9Q5+miPwlvUO5z6d7629IOVNX/yk8 EZViYMK+22p9lqF7sDGtfEIiUd1RzHAdLi2Ub8ge2oewk9SZfQVcF1YKd4p58KswTTwSZTXqvuK nwnUeOaak87vYCOShyA== X-Proofpoint-ORIG-GUID: C0RHJo_RKBeDPDMkpPPHSTXznQ55Fjti 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=2026-03-23_03,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 spamscore=0 suspectscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230098 On 3/23/26 1:32 PM, Luca Weiss wrote: > On Mon Mar 23, 2026 at 10:51 AM CET, Konrad Dybcio wrote: >> On 3/21/26 6:00 PM, Alexander Koskovich wrote: >>> The rmtfs_mem region is currently sized at 6MiB but the default for >>> milos downstream is 2.5MiB. This causes remoteproc crashes on devices >>> that expect the smaller size: >>> >>> modem_ac.c:281:Access Control Error: Could not protect the region specified:Start:e1f00000 End:e2180000, PID:1 >>> >>> Reduce the default to 2.5MiB to match the QCOM downstream config, and >>> override the size for FP6. >>> >>> Signed-off-by: Alexander Koskovich >>> --- >>> arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts | 4 ++++ >>> arch/arm64/boot/dts/qcom/milos.dtsi | 2 +- >>> 2 files changed, 5 insertions(+), 1 deletion(-) >>> >>> diff --git a/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts b/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts >>> index 52895dd9e4fa..c0981ab731c4 100644 >>> --- a/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts >>> +++ b/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts >>> @@ -724,6 +724,10 @@ &remoteproc_wpss { >>> status = "okay"; >>> }; >>> >>> +&rmtfs_mem { >>> + reg = <0x0 0xe1f00000 0x0 0x600000>; >> >> +Luca > > You didn't actually Cc me, but I found it on the mailing list anyways :) Oops! > >> >> Could you please confirm that this was intentional in the first place? >> >> FWIW I see that volcano.dtsi indeed only requests 0x280_000 on a "clean" >> Qualcomm tree > > Yes, it's intentional that it's 6 MiB on Fairphone (Gen. 6): > > https://gerrit-public.fairphone.software/plugins/gitiles/platform/vendor/qcom/proprietary/devicetree/+/b3744ffef87e1f2a232b26e9cb270a1f82554bc3%5E!/ "Root Cause: Requirement" :D > > I think Fixes is appropriate since the default for Milos should be > 0x280_000 and not 0x600_000? > > Fixes: d9d59d105f98 ("arm64: dts: qcom: Add initial Milos dtsi") > > And maybe a comment like this on top of the node? > > /* Increase the size from 2.5 MiB to 6 MiB */ Yeah, sounds good Reviewed-by: Konrad Dybcio Konrad