On 10/23/2024 19:41, Mario Limonciello wrote: > On 10/23/2024 01:32, Shyam Sundar S K wrote: >> The PMF driver will allocate shared buffer memory using the >> tee_shm_alloc_kernel_buf(). This allocated memory is located in the >> secure world and is used for communication with the PMF-TA. >> >> The latest PMF-TA version introduces new structures with OEM debug >> information and additional policy input conditions for evaluating the >> policy binary. Consequently, the shared memory size must be >> increased to >> ensure compatibility between the PMF driver and the updated PMF-TA. >> >> Co-developed-by: Patil Rajesh Reddy <Patil.Reddy@xxxxxxx> >> Signed-off-by: Patil Rajesh Reddy <Patil.Reddy@xxxxxxx> >> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> > > How does this present to a user? From what you describe it seems to > me like this means a new TA will fail on older kernel in some way. Newer TA will not fail on older systems. This change is just about the increase in TA reserved memory that is presented as "shared memory", as TA needs the additional memory for its own debug data structures.
