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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: dSulYgAPg2_LMil_Go0O9QaUlJlMAh-1 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTE0MDE1MCBTYWx0ZWRfX4w27AKCQQx55 JTPqmqx6QCV4zc92PnKMh94NXR3J5HnaJdBLz2cZp23tHkf4E8UEcRvGl0DdPXqhGkTk3D7Ol8J 6zXUPyKusco5oe2YRfTJ6LzoGS8aa35xUQ8GVJnCGPlcVhEk9+8lKgL+gpJUKswDbrnOdnoKE5h N/HszkHIJRfFCuuT+YUBH2GpgXhLflVCaJdFPJ4UTg1IV71HfpbRAN3qtJxH7gSazO/1bJwNGKD sERBSLhovu377GG8/vQgSK3pRiFD1MkPo8WiVeo5pAHC4CC5NEzmiPPseVGQpgsX8FZR9xHr8iT BOfCehixszgMS1K11haE3z50XQsg0239C2iCprtGIE3eBRwuiCSvwyQCKJBER+O/7/CYKejZ2yd Rr4AKjxZA8UDgVwzwFbb3I1G5mNEV1O4pj9egqMDLHKGsdRv4MxvdvvSUxHakt557gwyYulftPR NwQZ7t0jeM4i80K0Gjw== X-Authority-Analysis: v=2.4 cv=HY4ZjyE8 c=1 sm=1 tr=0 ts=6967daa8 cx=c_pps a=kVLUcbK0zfr7ocalXnG1qA==:117 a=Q5rFrUx7DTp4enn/YD2GRQ==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=-vY5I4PW3rQ7Gd5RY6YA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=vr4QvYf-bLy2KjpDp97w:22 X-Proofpoint-ORIG-GUID: dSulYgAPg2_LMil_Go0O9QaUlJlMAh-1 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=2026-01-14_05,2026-01-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 suspectscore=0 clxscore=1015 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2601140150 Hello Dmitry, On 1/13/2026 3:25 AM, Dmitry Baryshkov wrote: > On Mon, Jan 12, 2026 at 10:24:06PM -0800, Satya Durga Srinivasu Prabhala wrote: >> The ARM SMCCC SoC ID driver is currently enabled by default and publishes >> SMCCC-provided SoC identification into /sys/bus/soc/devices/socX/*. >> >> On platforms where a vendor SoC driver already exposes widely-consumed >> attributes (e.g. Qualcomm socinfo [1]), enabling the SMCCC driver changes >> the format of /sys/devices/soc0/soc_id (e.g. "jep106:XXYY:ZZZZ" instead >> of a vendor logical ID like "519") and breaks existing userspace consumers. >> >> Flip the default of CONFIG_ARM_SMCCC_SOC_ID from y to n. Platforms that >> prefer SMCCC over a vendor driver can explicitly enable it. > NAK, the userspace should not depend on the exact kernel configuration. > Consider working with distribution kernels, which would enable this > driver anyway. As I mentioned in the other replies, vendor interface exists before the standard interface and user space heavily relies on soc0 already. If not disabling the SMCCC SOC ID by default. I believe, we should  at-least have a way to make sure vendors can disable SMCCC SOC ID by some means or have vendor interface takes precedence. Best, Satya > >> This avoids unexpected format changes and keeps the generic SoC sysfs >> stable on systems that rely on vendor-specific identification. >> >> [1] >> Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/soc/qcom/socinfo.c >> >> Signed-off-by: Satya Durga Srinivasu Prabhala >> --- >> drivers/firmware/smccc/Kconfig | 5 ++++- >> 1 file changed, 4 insertions(+), 1 deletion(-) >>