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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6507bf65c07sm4444854a12.23.2026.01.07.03.29.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 07 Jan 2026 03:29:07 -0800 (PST) Message-ID: <73bcf4c8-3d49-4b55-a771-0c5c1ef54380@oss.qualcomm.com> Date: Wed, 7 Jan 2026 12:29:02 +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 2/2] arm64: dts: qcom: agatti: Address Gunyah memory alignment needs To: Sumit Garg , Bjorn Andersson Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, akhilpo@oss.qualcomm.com, vikash.garodia@oss.qualcomm.com, dikshita.agarwal@oss.qualcomm.com, robin.clark@oss.qualcomm.com, lumag@kernel.org, linux-kernel@vger.kernel.org, Sumit Garg References: <20251229071258.456254-1-sumit.garg@kernel.org> <20251229071258.456254-2-sumit.garg@kernel.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTA3MDA5MiBTYWx0ZWRfX2NZO0CTXgCct 9VDBTSYrLIdKnu/cIMg0+X1L865KiRaYgfsW4I06SV5/ItHOgHCQp3ewRa4C2X6ANQH+CxvLf2Z uEd5bD/j3zaMtGfGOsUyF+aFh33BqK5cy5apbcUjlAbF9ObYS29nBN/1V5erMlgTlhB31cc7Nr0 pbHGUo0wvVKpVgw1soOGbr53q/MCbQ9qGmrJa3MCQMEDpwiWBnEz4s3F5KIUBNlDT5/WBQeOW3w 2mmO7ZTAaPIkfb27gU+ViJimu9wgiwuMZoypYQ64wbItNe1qy1OSf5rBNVcLgsFzwFaN9YMEWhf 9reMsZ7nxt12VNnIoOfe8UDWSVTRGXqLXYJPgMWtAKyNbBHTI9EDjwY6VyD/MJ6OEctxZ8ZKh4u XqRK4Nwv5jUyOxLHs2CWzgBP6H2MuGVnTQV2YILaStzsEhX91A1T7+IoENjKqIhi92zsrMVB97u S/TMOe83wwf+1XWj+ow== X-Authority-Analysis: v=2.4 cv=CYEFJbrl c=1 sm=1 tr=0 ts=695e4384 cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=L4FEu4VOam2RnATWhIUA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-GUID: meTnJtq8ofuG--5_SpCqaqO4LikgllEm X-Proofpoint-ORIG-GUID: meTnJtq8ofuG--5_SpCqaqO4LikgllEm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-07_01,2026-01-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 clxscore=1015 impostorscore=0 malwarescore=0 phishscore=0 spamscore=0 adultscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2601070092 On 1/5/26 6:46 AM, Sumit Garg wrote: > On Sat, Jan 03, 2026 at 09:49:04AM -0600, Bjorn Andersson wrote: >> On Mon, Dec 29, 2025 at 12:42:58PM +0530, Sumit Garg wrote: >>> From: Sumit Garg >>> >>> Gunyah hypervisor requires it's memory start address to be 2MB aligned. >>> So the address map for Agatti is updated to incorporate that requirement. >>> This should be a backwards compatible DT change which should work with >>> legacy QHEE based firmware stack too. >>> >> >> How come this isn't conveyed to the operating system using the UEFI >> memory map? >> > > I agree that with EFI boot, the information is getting conveyed via EFI > memory map. But there will be non-EFI boot scenarios as well in case of > U-Boot. And moreover I suppose we need to keep the reserved memory > ranges in DT updated to reflect the actual memory map. Can U-Boot not do the same by altering /reserved-memory or /memory/reg? Konrad