ARMv8.4-TTL provides the TTL field in tlbi instruction to indicate the level of translation table walk holding the leaf entry for the address that is being invalidated. Hardware can use this information to determine if there was a risk of splintering. This set of patches adds TTL field to __TLBI_ADDR, and uses Architecture-specific MM context to pass the TTL value to tlb interface. The default value of TTL is 0, which will not have any impact on the TLB maintenance instructions. The last patch trys to use TTL field in some obviously tlb-flush interface. Zhenyu Ye (3): arm64: tlb: add TTL field to __TLBI_ADDR arm64: tlb: use mm_struct.context.flags to indicate TTL arm64: tlb: add support for TTL in some functions arch/arm64/include/asm/cpucaps.h | 3 ++- arch/arm64/include/asm/mmu.h | 11 ++++++++++ arch/arm64/include/asm/sysreg.h | 4 ++++ arch/arm64/include/asm/tlb.h | 3 +++ arch/arm64/include/asm/tlbflush.h | 35 +++++++++++++++++++++++-------- arch/arm64/kernel/cpufeature.c | 10 +++++++++ arch/arm64/kernel/sys_compat.c | 2 +- arch/arm64/mm/hugetlbpage.c | 2 ++ 8 files changed, 59 insertions(+), 11 deletions(-) -- 2.19.1
