[stable:PATCH 0/4 v5.4] arm64: Workaround Neoverse-N1 #1542419

[James Morse <james.morse@xxxxxxx>]

This series backports the Neoverse-N1 #1542419 erratum workaround
to v5.4.35. The series was originally merged in v5.5.

These patches handle user-space. The kernel change was:
commit dd8a1f134884 ("arm64: ftrace: Ensure synchronisation in PLT setup
for Neoverse-N1 #1542419"), which was taken as a fix for v5.4.

Thanks,

James

Catalin Marinas (1):
  arm64: Silence clang warning on mismatched value/register sizes

James Morse (3):
  arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1
    #1542419
  arm64: Fake the IminLine size on systems affected by Neoverse-N1
    #1542419
  arm64: compat: Workaround Neoverse-N1 #1542419 for compat user-space

 Documentation/arm64/silicon-errata.rst |  2 ++
 arch/arm64/Kconfig                     | 16 +++++++++++++
 arch/arm64/include/asm/cache.h         |  3 ++-
 arch/arm64/include/asm/cpucaps.h       |  3 ++-
 arch/arm64/kernel/cpu_errata.c         | 32 +++++++++++++++++++++++++-
 arch/arm64/kernel/sys_compat.c         | 11 +++++++++
 arch/arm64/kernel/traps.c              |  9 ++++++++
 7 files changed, 73 insertions(+), 3 deletions(-)

-- 
2.19.1