arm64: entry: move ARM64_ERRATUM_1418040 workaround to C
To make the entry code less of a rats nest of overlapping labels and
shared state, and to make the code easier to debug and maintain, lets
move the workaround for ARM64_ERRATUM_1418040 to C.
The workaround requires us to disable EL0 access to the virtual counter,
and emulate these accesses when they are trapped. The assembly code is
only responsible for manipulating the trap control, which we can safely
do in C code.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Will Deacon <will@kernel.org>
2 files changed
