firmware: qcom: tzmem: enable SHM Bridge support

SHM Bridge is a safety mechanism allowing to limit the amount of memory
shared between the kernel and the TrustZone to regions explicitly marked
as such.

Add a variant of the tzmem allocator that configures the memory pools as
SHM bridges. It also enables the SHM bridge globally so non-SHM bridge
memory will no longer work with SCM calls.

If enabled at build-time, it will still be checked for availability at
run-time. If the architecture doesn't support SHM Bridge, the allocator
will fall back to the generic mode.

Signed-off-by: Bartosz Golaszewski <[email protected]>
Tested-by: Andrew Halaney <[email protected]> # sc8280xp-lenovo-thinkpad-x13s
Tested-by: Deepti Jaggi <[email protected]> #sa8775p-ride
Reviewed-by: Elliot Berman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>

0 files changed, 0 insertions, 0 deletions