tree c1e4fe52803e4f3d6a9e4878ed7e69b4ebcd7fd3
parent 1220a6bf59bdc3882afe454619990a44417d936b
author Linus Walleij <linus.walleij@linaro.org> 1747657244 +0200
committer Linus Walleij <linus.walleij@linaro.org> 1750798884 +0200

arm64: process: Add tls_thread_restore_current()

This function restores the TPIDR_EL0 and TPIDRRO_EL0
registers from the current task.

This will be used when temporarily clobbering these two
registers during early kernel entry for dynamic stacks.

As we cannot use the stack to store anything if we get
an exception on the stack itself, we need some place
to stash away enough of the processor registers so
that we can switch to a temporary stack really early
in assembly entry.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>