On Fri, Oct 11, 2019 at 10:16:28AM +0100, Robin Murphy wrote: > On 2019-10-11 4:46 am, Nicolin Chen wrote: > > This series of patches add an optional DT property to allow an SoC to > > specify how many bits being physically connected to its SMMU instance, > > depending on the SoC design. > > This has come up before, and it doesn't work in general because a single > SMMU instance can have many master interfaces, with potentially different > sizes of address bus wired up to each. It's also a conceptually-wrong > approach anyway, since this isn't a property of the SMMU; it's a property of > the interconnect(s) upstream of the SMMU. > > IIRC you were working on Tegra - if so, Thierry already has a plan, see this > thread: > https://lore.kernel.org/linux-arm-kernel/20190930133510.GA1904140@ulmo/ Thanks for the reply and link!
