tree df4da3d6958d759546be58fff74bde423da39ad3
parent 08d5670d5a3af2533de09048fcf670625b2771fe
author Mark Rutland <mark.rutland@arm.com> 1621348539 +0100
committer Mark Rutland <mark.rutland@arm.com> 1621349046 +0100

arm64: assembler: add conditional cache fixups

It would be helpful if we could use both `dcache_by_line_op` and
`invalidate_icache_by_line` for user memory without accidentally fixing
up unexpected faults when performing maintenance on kernel addresses.

Let's make this possible by having both macros take an optional fixup
label, and only generating an extable entry if a label is provided.

At the same time, let's clean up the labels used to be globally unique
using \@ as we do for other macros.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <aedb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Fuad Tabba <tabba@google.com>
Cc: Will Deacon <will@kernel.org>