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(-)