On 18.03.2024 02:31, Bjorn Andersson wrote: > On Sat, Mar 09, 2024 at 02:31:10PM +0100, Konrad Dybcio wrote: >> SC8280XP actually has a third SMMU, which can be seen in e.g. the IORT >> ACPI table and is used for the PCIe hosts. >> >> Unfortunately though, the secure firmware seems to be configured in a >> way such that Linux can't touch it, not even read back the ID registers. >> It also seems like the SMMU is configured to run in some sort of bypass >> mode, completely opaque to the OS. >> >> Describe it so that one can configure it when running Linux as a >> hypervisor (e.g with [1]) and for hardware description completeness. >> >> [1] https://github.com/TravMurav/slbounce >> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> > > Have this information been validated? Or are you suggesting we add it > for documentation purposes? I confirmed the platforms boots up with this if the hypervisor is gone. Konrad
