On Tue, 2020-06-09 at 11:32 -0600, Rob Herring wrote: > On Tue, Jun 09, 2020 at 06:24:19PM +0800, Neal Liu wrote: > > These patch series introduce a MediaTek MT6873 devapc driver. > > > > MT6873 bus frabric provides TrustZone security support and data > > protection to prevent slaves from being accessed by unexpected > > masters. > > The security violations are logged and sent to the processor for > > further analysis or countermeasures. > > > > Any occurrence of security violation would raise an interrupt, and > > it will be handled by devapc-mt6873 driver. The violation > > information is printed in order to find the murderer. > > There's also a proposed driver with similar functionality[1]. Come up > with a common solution. > > Rob > > [1] https://lore.kernel.org/linux-arm-kernel/20200128153806.7780-1-benjamin.gaignard@xxxxxx/ Actually, Mediatek devapc HW do the similar things. But the real "firewall" functionality is implemented in TrustZone instread of REE. This devapc-mt6873 driver is mainly handled the violation. Bus firewall framework seems not cover this parts.
