arm64: fix "dc cvau" cache operation on errata-affected core
authorAndre Przywara <andre.przywara@arm.com>
Tue, 28 Jun 2016 17:07:28 +0000 (18:07 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 1 Jul 2016 10:26:20 +0000 (11:26 +0100)
commit290622efc76ece22ef76a30bf117755891ab27f6
tree565b544e4d178c78ab32d1246f5585ec922074c9
parentb82bfa4793cd0f8fde49b85e0ad66906682e7447
arm64: fix "dc cvau" cache operation on errata-affected core

The ARM errata 819472, 826319, 827319 and 824069 for affected
Cortex-A53 cores demand to promote "dc cvau" instructions to
"dc civac" as well.
Attribute the usage of the instruction in __flush_cache_user_range
to also be covered by our alternative patching efforts.
For that we introduce an assembly macro which both deals with
alternatives while still tagging the instructions as USER.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/include/asm/alternative.h
arch/arm64/mm/cache.S