On 24.02.2025 09:55, Marco Felsch wrote: > Hi Laurentiu, > > thanks for your patch. > > On 25-02-21, Laurentiu Mihalcea wrote: >> From: Laurentiu Mihalcea <laurentiu.mihalcea@xxxxxxx> >> >> The secure AHB to IP Slave (AIPSTZ) bus bridge provides access control >> configurations meant to restrict access to certain peripherals. >> Some of the configurations include: >> >> 1) Marking masters as trusted for R/W. Based on this >> (and the configuration of the accessed peripheral), the bridge >> may choose to abort the R/W transactions issued by certain >> masters. > Setting these bits requires very often that the core is running at EL3 > (e.g. secure-monitor) which is not the case for Linux. Can you please > provide more information how Linux can set these bits? > > Regards, > Marco In this particular case, as far as I was able to understand, NS EL1 has enough privilege to program this IP. This is why Linux can do it.
