** Description changed: SRU Justification: [Impact] - OPTEE is non functional if the ARM FFA Transport is configured. + OPTEE is non functional if the ARM FF-A Transport is configured. OP-TEE supports 2 communication transports and by default attempts to set up both transports. (1) SMC - Secure Monitor Transport - this is the traditional and primary transport mechanism for OP-TEE. (2) FF-A (Firmware Framework for Arm) Transport - this is new and added for Ubuntu 24.04 For the FF-A transport, the OPTEE driver depends on the FFA Kernel Module. The FF-A Kernel Module requires ARM SMCCC version 1.2 support. Ubuntu 24.04 kernel only supports ARM SMCCC version 1.1 and below. What happens is when the FF-A Kernel Module loads, it aborts since 1.2 is NOT supported and is unloaded. Later the OPTEE driver uses an FF-A API and tries calling into the FF-A kernel Module (which has unloaded), resulting in the OPTEE driver getting an "undefined" symbol error and unloading itself. This also results in the Msoft fTPM driver and tee- supplicant service not loading either as they depend on the OPTEE driver. [Fix] Disable the kernel configuration for the ARM FF-A Transport. This results in OPTEE not calling into the FF-A kernel module and instead using its traditional SMC transport and loads and functions properly. [Test Case] We have fTPM/OPTEE support in our kernel. Removing the ARM FF-A config from the 24.04 kernel results in OPTEE working as designed using the SMC transport. The TPM2 tools are used to verify the full kernel path. [Regression Potential] None. This change only effects OPTEE, as its the only SW in the kernel using the ARM FF-A Transport (which cannot run/execute until Ubuntu 24.04 kernel supports ARM SMCCC version 1.2.)
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-bluefield in Ubuntu. https://bugs.launchpad.net/bugs/2120582 Title: Ubuntu:noble:[Config] Disable CONFIG_ARM_FFA_TRANSPORT and CONFIG_ARM_FFA_SMCCC for OPTEE functionality Status in linux-bluefield package in Ubuntu: New Bug description: SRU Justification: [Impact] OPTEE is non functional if the ARM FF-A Transport is configured. OP-TEE supports 2 communication transports and by default attempts to set up both transports. (1) SMC - Secure Monitor Transport - this is the traditional and primary transport mechanism for OP-TEE. (2) FF-A (Firmware Framework for Arm) Transport - this is new and added for Ubuntu 24.04 For the FF-A transport, the OPTEE driver depends on the FFA Kernel Module. The FF-A Kernel Module requires ARM SMCCC version 1.2 support. Ubuntu 24.04 kernel only supports ARM SMCCC version 1.1 and below. What happens is when the FF-A Kernel Module loads, it aborts since 1.2 is NOT supported and is unloaded. Later the OPTEE driver uses an FF-A API and tries calling into the FF-A kernel Module (which has unloaded), resulting in the OPTEE driver getting an "undefined" symbol error and unloading itself. This also results in the Msoft fTPM driver and tee- supplicant service not loading either as they depend on the OPTEE driver. [Fix] Disable the kernel configuration for the ARM FF-A Transport. This results in OPTEE not calling into the FF-A kernel module and instead using its traditional SMC transport and loads and functions properly. [Test Case] We have fTPM/OPTEE support in our kernel. Removing the ARM FF-A config from the 24.04 kernel results in OPTEE working as designed using the SMC transport. The TPM2 tools are used to verify the full kernel path. [Regression Potential] None. This change only effects OPTEE, as its the only SW in the kernel using the ARM FF-A Transport (which cannot run/execute until Ubuntu 24.04 kernel supports ARM SMCCC version 1.2.) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2120582/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
