[PATCH v3 0/3] arm64: tlb: add support for TLBI RANGE instructions

[Zhenyu Ye]

NOTICE: this series are based on the arm64 for-next/tlbi branch:
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/tlbi

ARMv8.4-TLBI provides TLBI invalidation instruction that apply to a
range of input addresses. This series add support for this feature.

--
ChangeList:
v3:
- add check on whether binutils supports ARMv8.4-a instructions.
- pass -march=armv8.4-a to KBUILD_CFLAGS.
- make __TLBI_RANGE_PAGES to be 'unsigned long' explicitly.

v2:
- remove the __tlbi_last_level() macro.
- add check for parameters in __TLBI_VADDR_RANGE macro.

RFC patches:
- Link: https://lore.kernel.org/linux-arm-kernel/20200708124031.1414-1-yezhenyu2@xxxxxxxxxx/


Zhenyu Ye (3):
  arm64: tlb: Detect the ARMv8.4 TLBI RANGE feature
  arm64: enable tlbi range instructions
  arm64: tlb: Use the TLBI RANGE feature in arm64

 arch/arm64/Kconfig                |  14 +++
 arch/arm64/Makefile               |   7 ++
 arch/arm64/include/asm/cpucaps.h  |   3 +-
 arch/arm64/include/asm/sysreg.h   |   3 +
 arch/arm64/include/asm/tlbflush.h | 156 ++++++++++++++++++++++++------
 arch/arm64/kernel/cpufeature.c    |  10 ++
 6 files changed, 163 insertions(+), 30 deletions(-)

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2.19.1