arm64: entry: Hook up entry trampoline to exception vectors

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Commit 4bf3286d29 upstream.

Hook up the entry trampoline to our exception vectors so that all
exceptions from and returns to EL0 go via the trampoline, which swizzles
the vector base register accordingly. Transitioning to and from the
kernel clobbers x30, so we use tpidrro_el0 and far_el1 as scratch
registers for native tasks.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Will Deacon 2017-11-14 14:24:29 +00:00 • committed by Greg Kroah-Hartman

parent 3117e455ee

commit 89685f858b

1 changed files with 36 additions and 3 deletions

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arch/arm64/kernel/entry.S

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