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. See patches for details, Thanks. [1] https://lore.kernel.org/linux-arm-kernel/20200211174938.27809-1-maz@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. Marc Zyngier (2): arm64: Detect the ARMv8.4 TTL feature arm64: Add level-hinted TLB invalidation helper Zhenyu Ye (4): arm64: Add level-hinted TLB invalidation helper to tlbi_user mm: Add page table level flags to vm_flags arm64: tlb: Use translation level hint in vm_flags mm: Set VM_LEVEL flags in some tlb_flush functions arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/mmu.h | 2 + arch/arm64/include/asm/sysreg.h | 1 + arch/arm64/include/asm/tlb.h | 12 +++++ arch/arm64/include/asm/tlbflush.h | 74 ++++++++++++++++++++++++++++--- arch/arm64/kernel/cpufeature.c | 11 +++++ arch/arm64/mm/hugetlbpage.c | 4 +- arch/arm64/mm/mmu.c | 14 ++++++ include/asm-generic/pgtable.h | 16 ++++++- include/linux/mm.h | 10 +++++ include/trace/events/mmflags.h | 15 ++++++- mm/huge_memory.c | 8 +++- 12 files changed, 157 insertions(+), 13 deletions(-) -- 2.19.1
