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 3 added __tlbi_user_level interface. Patch 4 was provided by Peter and added some mmu_gather APIs. Patch 5 provided flush_*_tlb_range wrappers so we can do the tlb invalidation according to the information in struct mmu_gather. Finally, we supported TTL feature in ARM64 by using tlb->cleared_* in struct mmu_gather. See patches for details, Thanks. Marc Zyngier (2): arm64: Detect the ARMv8.4 TTL feature arm64: Add level-hinted TLB invalidation helper Peter Zijlstra (Intel) (1): tlb: mmu_gather: add tlb_set_*_range APIs Zhenyu Ye (3): arm64: Add tlbi_user_level TLB invalidation helper mm: tlb: Provide flush_*_tlb_range wrappers arm64: tlb: Set the TTL field in flush_tlb_range arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/sysreg.h | 1 + arch/arm64/include/asm/tlb.h | 26 ++++++++++++++- arch/arm64/include/asm/tlbflush.h | 53 ++++++++++++++++++++++++----- arch/arm64/kernel/cpufeature.c | 11 +++++++ include/asm-generic/pgtable.h | 12 +++++-- include/asm-generic/tlb.h | 55 ++++++++++++++++++++++--------- mm/pgtable-generic.c | 50 ++++++++++++++++++++++++++++ 8 files changed, 184 insertions(+), 27 deletions(-) -- 2.19.1
