[RFC,v3,0/2] arm64: tlb: add support for TLBI RANGE instructions

Message

Zhenyu Ye June 1, 2020, 2:47 p.m. UTC

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

--
ChangeList:
v4:
combine the __flush_tlb_range() and the __directly into the same function
with a single loop for both.

v3:
rebase this series on Linux 5.7-rc1.

v2:
Link: https://lkml.org/lkml/2019/11/11/348

Zhenyu Ye (2):
  arm64: tlb: Detect the ARMv8.4 TLBI RANGE feature
  arm64: tlb: Use the TLBI RANGE feature in arm64

 arch/arm64/include/asm/cpucaps.h  |   3 +-
 arch/arm64/include/asm/sysreg.h   |   4 ++
 arch/arm64/include/asm/tlbflush.h | 108 +++++++++++++++++++++++++++++-
 arch/arm64/kernel/cpufeature.c    |  11 +++
 4 files changed, 124 insertions(+), 2 deletions(-)