[RFC PATCH v5 0/8] arm64: tlb: add support for TTL feature

[Zhenyu Ye]

In order to reduce the cost of TLB invalidation, the ARMv8.4 TTL
feature allows TLBs to be issued with a level allowing for quicker
invalidation.  This series provide support for this feature.

Patch 1 and Patch 2 was provided by Marc on his NV series[1] patches,
which detect the TTL feature and add __tlbi_level interface.
Patch 4-7 passes struct mmu_gather to flush_tlb_range, which can pass
the level of tlbi invalidations.  Arm64 and power9 can benefit from this.
Patch 8 set the TTL field in arm64 by using the cleared_* values in
struct mmu_gather.

See patches for details, Thanks.

[1] https://lore.kernel.org/linux-arm-kernel/20200211174938.27809-1-maz@xxxxxxxxxx/
[2] https://lore.kernel.org/linux-arm-kernel/7859561b-78b4-4a12-2642-3741d7d3e7b8@xxxxxxxxxx/

--
ChangeList:
v1:
add support for TTL feature in arm64.

v2:
build the patch on Marc's NV series[1].

v3:
use vma->vm_flags to replace mm->context.flags.

v4:
add Marc's patches into my series.

v5:
pass struct mmu_gather to flush_tlb_range, then set the
TTL field by using infos in struct mmu_gather.


Marc Zyngier (2):
  arm64: Detect the ARMv8.4 TTL feature
  arm64: Add level-hinted TLB invalidation helper

Zhenyu Ye (6):
  arm64: Add tlbi_user_level TLB invalidation helper
  mm: tlb: Pass struct mmu_gather to flush_pmd_tlb_range
  mm: tlb: Pass struct mmu_gather to flush_pud_tlb_range
  mm: tlb: Pass struct mmu_gather to flush_hugetlb_tlb_range
  mm: tlb: Pass struct mmu_gather to flush_tlb_range
  arm64: tlb: Set the TTL field in flush_tlb_range

 Documentation/core-api/cachetlb.rst           |  8 ++-
 arch/alpha/include/asm/tlbflush.h             |  8 +--
 arch/alpha/kernel/smp.c                       |  3 +-
 arch/arc/include/asm/hugepage.h               |  4 +-
 arch/arc/include/asm/tlbflush.h               | 11 ++--
 arch/arc/mm/tlb.c                             |  8 +--
 arch/arm/include/asm/tlbflush.h               | 12 ++--
 arch/arm/kernel/smp_tlb.c                     |  4 +-
 arch/arm/mach-rpc/ecard.c                     |  8 ++-
 arch/arm64/crypto/aes-glue.c                  |  1 -
 arch/arm64/include/asm/cpucaps.h              |  3 +-
 arch/arm64/include/asm/sysreg.h               |  1 +
 arch/arm64/include/asm/tlb.h                  | 39 +++++++++++-
 arch/arm64/include/asm/tlbflush.h             | 63 +++++++++++++------
 arch/arm64/kernel/cpufeature.c                | 11 ++++
 arch/arm64/mm/hugetlbpage.c                   | 10 ++-
 arch/csky/include/asm/tlb.h                   |  2 +-
 arch/csky/include/asm/tlbflush.h              |  6 +-
 arch/csky/mm/tlb.c                            |  4 +-
 arch/hexagon/include/asm/tlbflush.h           |  2 +-
 arch/hexagon/mm/vm_tlb.c                      |  4 +-
 arch/ia64/include/asm/tlbflush.h              |  6 +-
 arch/ia64/mm/tlb.c                            |  5 +-
 arch/m68k/include/asm/tlbflush.h              | 10 +--
 arch/microblaze/include/asm/tlbflush.h        |  5 +-
 arch/mips/include/asm/hugetlb.h               |  6 +-
 arch/mips/include/asm/tlbflush.h              |  9 +--
 arch/mips/kernel/smp.c                        |  3 +-
 arch/nds32/include/asm/tlbflush.h             |  3 +-
 arch/nios2/include/asm/tlbflush.h             |  9 +--
 arch/nios2/mm/tlb.c                           |  8 ++-
 arch/openrisc/include/asm/tlbflush.h          | 10 +--
 arch/openrisc/kernel/smp.c                    |  2 +-
 arch/parisc/include/asm/tlbflush.h            |  2 +-
 arch/parisc/kernel/cache.c                    | 13 +++-
 arch/powerpc/include/asm/book3s/32/tlbflush.h |  4 +-
 arch/powerpc/include/asm/book3s/64/tlbflush.h |  9 ++-
 arch/powerpc/include/asm/nohash/tlbflush.h    |  7 ++-
 arch/powerpc/mm/book3s32/tlb.c                |  6 +-
 arch/powerpc/mm/book3s64/pgtable.c            |  8 ++-
 arch/powerpc/mm/book3s64/radix_tlb.c          |  2 +-
 arch/powerpc/mm/nohash/tlb.c                  |  6 +-
 arch/riscv/include/asm/tlbflush.h             |  7 ++-
 arch/riscv/mm/tlbflush.c                      |  4 +-
 arch/s390/include/asm/tlbflush.h              |  5 +-
 arch/sh/include/asm/tlbflush.h                |  8 +--
 arch/sh/kernel/smp.c                          |  2 +-
 arch/sparc/include/asm/tlbflush_32.h          |  2 +-
 arch/sparc/include/asm/tlbflush_64.h          |  3 +-
 arch/sparc/mm/tlb.c                           |  5 +-
 arch/um/include/asm/tlbflush.h                |  6 +-
 arch/um/kernel/tlb.c                          |  4 +-
 arch/unicore32/include/asm/tlbflush.h         |  5 +-
 arch/x86/include/asm/tlbflush.h               |  4 +-
 arch/x86/mm/pgtable.c                         | 10 ++-
 arch/xtensa/include/asm/tlbflush.h            | 10 +--
 arch/xtensa/kernel/smp.c                      |  2 +-
 include/asm-generic/pgtable.h                 | 10 +--
 include/asm-generic/tlb.h                     |  2 +-
 mm/huge_memory.c                              | 19 +++++-
 mm/hugetlb.c                                  | 17 +++--
 mm/mapping_dirty_helpers.c                    | 23 ++++---
 mm/migrate.c                                  |  8 ++-
 mm/mprotect.c                                 |  8 ++-
 mm/mremap.c                                   | 17 ++++-
 mm/pgtable-generic.c                          | 51 ++++++++++++---
 mm/rmap.c                                     |  6 +-
 67 files changed, 409 insertions(+), 174 deletions(-)

-- 
2.19.1