[SRU][Bionic][PATCH 0/2] Fix ThunderX boot issues

[Juerg Haefliger]

Two trivial KPTI patches to fix a nasty ThunderX boot issues.

The 'arm64: add sentinel to kpti_safe_list' patch might not be a
contributor here but it certainly fixes a real issue since on ThunderX the
list is traversed all the way to the end and not stopped due to the
missing sentinel.

The real problem is fixed by 'arm64: Check for errata before evaluating
cpu features'. The kernel has a check in place for a certain Cavium errata.
If that errata is enabled, KPTI is turned off (the code comment mentions
I-cache clobbering if both are enabled at the same time). Some earlier KPTI
commit changed the order in which features and erratas are evaluated and
enabled resulting in a short period of time where both KPTI and that errata
are enabled. The fix reverses that order.

Dirk Mueller (1):
  arm64: Check for errata before evaluating cpu features

Mark Rutland (1):
  arm64: add sentinel to kpti_safe_list

 arch/arm64/kernel/cpufeature.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

-- 
2.20.1