On Tuesday, January 13, 2026 8:28:11 AM CST Konrad Dybcio wrote: > On 1/9/26 5:33 AM, Alexandru Gagniuc wrote: > > Support loading remoteproc firmware on IPQ9574 with the qcom_q6v5_wcss > > driver. This firmware is usually used to run ath11k firmware and enable > > wifi with chips such as QCN5024. > > > > When submitting v1, I learned that the firmware can also be loaded by > > the trustzone firmware. Since TZ is not shipped with the kernel, it > > makes sense to have the option of a native init sequence, as not all > > devices come with the latest TZ firmware. > > > > Qualcomm tries to assure us that the TZ firmware will always do the > > right thing (TM), but I am not fully convinced > > Why else do you think it's there in the firmware? :(
A more relevant question is, why do some contributors sincerely believe that the TZ initialization of Q6 firmware is not a good idea for their use case? To answer your question, I think the TZ initialization is an afterthought of the SoC design. I think it was only after ther the design stage that it was brought up that a remoteproc on AHB has out-of-band access to system memory, which poses security concerns to some customers. I think authentication was implemented in TZ to address that. I also think that in order to prevent clock glitching from bypassing such verification, they had to move the initialization sequence in TZ as well. Alex
