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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-121f24346b5sm27572556c88.3.2026.01.12.22.24.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jan 2026 22:24:30 -0800 (PST) From: Satya Durga Srinivasu Prabhala Date: Mon, 12 Jan 2026 22:24:06 -0800 Subject: [PATCH] firmware: smccc: default ARM_SMCCC_SOC_ID to disabled Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260112-disable_smccc_soc_id-v1-1-a5bee24befb4@oss.qualcomm.com> X-B4-Tracking: v=1; b=H4sIAAXlZWkC/x3MQQqEMAxA0atI1hbaIhbnKiJFk1QDjkoDIoh3t 7h8i/9vUM7CCr/qhsynqOxbgasrwGXcZjZCxeCtb61z3pDoOK0c9Y+IUXeMQobJdpwaCiEkKOm ROcn1bfvheV4mS2f7ZgAAAA== X-Change-ID: 20260112-disable_smccc_soc_id-ed09ef4d777f To: Mark Rutland , Lorenzo Pieralisi , Sudeep Holla Cc: linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, satya.prabhala@oss.qualcomm.com, trilok.soni@oss.qualcomm.com X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1768285470; l=1982; i=satya.prabhala@oss.qualcomm.com; h=from:subject:message-id; bh=9R9d5MZ+Rg409Z594WhcPXh/1yixAU8E+fucp+ksQJc=; b=6IhJXSGy4B29tw7x441sQgxggIBB0UmATvgPjlBoFmm9x5/q14EwKP0EqoQvm//CLDHrkfGXK mW7QTeFcS+GDyc8ojDOMuyVe5ah5TjvMz8NMpxnkLiFCkQe2qgw7xo0 X-Developer-Key: i=satya.prabhala@oss.qualcomm.com; a=ed25519; pk=N96J7WMj6/IKz17G+h6uiK/39yry7OdLwoUtHgPtafw= X-Proofpoint-GUID: fhj_vh9JgGOYY_rQiZ_hOYiHR_iSiEp3 X-Proofpoint-ORIG-GUID: fhj_vh9JgGOYY_rQiZ_hOYiHR_iSiEp3 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTEzMDA1MCBTYWx0ZWRfXwZdNIvh2b+O2 lEWBKYHeyFnPl0ekSI/b9iGGI2HfDhx47lCdVPOm2h/yv1qrfvWUg5rWj3WRC5X0jlrs/j9sfYW dMXWAUt0VRrl4nCymEj3Wdcn+Rgxpd6Fm+xH4MrVmTVCpENQlW2D/P/+KAjVgfKShGUVex2hOE8 7bCTY9Z3r1nZ3rASs6reG4CWk8zWY9MQsLrt/10c5WZiRB37pd9i/CGWawciKhBpuv2/oYIdt6W Fx7yPw6xZzwtthvfMyexBMlf7bOl100rjQs4sTo9dpU4u2itkJcrR3eUHVYvM45yqASOSARPoNX +03J+eK+0026AVWLA6mCn0shWi9iSehohHLFGWi+QRJIktkkMfAUdxhlDLml5RyNoXsgQs5R2Kd SF4aaLZ9vgV9fKkQJip0AUJQX+Nj0nUpqz0pwy8QHZSoWXG3WWcO5V6OYqoX2utEetfr3KiwIdD gRxYJ/linpiaYQ3w4KA== X-Authority-Analysis: v=2.4 cv=IIsPywvG c=1 sm=1 tr=0 ts=6965e520 cx=c_pps a=JYo30EpNSr/tUYqK9jHPoA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=5JjZXzRyNiR89YENP3AA:9 a=QEXdDO2ut3YA:10 a=Fk4IpSoW4aLDllm1B1p-:22 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=2026-01-13_01,2026-01-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 adultscore=0 clxscore=1011 bulkscore=0 phishscore=0 priorityscore=1501 suspectscore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2601130050 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. 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/tr= ee/drivers/soc/qcom/socinfo.c Signed-off-by: Satya Durga Srinivasu Prabhala --- drivers/firmware/smccc/Kconfig | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/smccc/Kconfig b/drivers/firmware/smccc/Kconfig index 15e7466179a6..f830d11ebdca 100644 --- a/drivers/firmware/smccc/Kconfig +++ b/drivers/firmware/smccc/Kconfig @@ -18,8 +18,11 @@ config HAVE_ARM_SMCCC_DISCOVERY config ARM_SMCCC_SOC_ID bool "SoC bus device for the ARM SMCCC SOC_ID" depends on HAVE_ARM_SMCCC_DISCOVERY - default y + default n select SOC_BUS help Include support for the SoC bus on the ARM SMCCC firmware based platforms providing some sysfs information about the SoC variant. + Note: Several vendor platforms provide their own SoC information + drivers under drivers/soc/*. To avoid conflicting sysfs attribute + formats in /sys/devices/socX/*, this driver defaults to disabled. --- base-commit: b71e635feefc852405b14620a7fc58c4c80c0f73 change-id: 20260112-disable_smccc_soc_id-ed09ef4d777f Best regards, --=20 Satya Durga Srinivasu Prabhala