Hello again, This is v1 of the RFC I previously posted here:
http://lists.infradead.org/pipermail/linux-arm-kernel/2018-August/597821.html The main changes include: * Rewrite the comment in tlbflush.h to explain the various functions and justify the barrier semantics * Fix the "flush entire ASID" heuristic to work with !4K page sizes * Fixed the build on sh (well, it fails somewhere else that isn't my fault) * Report PxD_SHIFT instead of PxD_SIZE via tlb_get_unmap_shift() It's also had a lot more testing, but has held up nicely so far on arm64. I haven't figured out how to merge this yet, but I'll probably end up pulling the core changes out onto a separate branch. Cheers, Will --->8 Peter Zijlstra (1): asm-generic/tlb: Track freeing of page-table directories in struct mmu_gather Will Deacon (11): arm64: tlb: Use last-level invalidation in flush_tlb_kernel_range() arm64: tlb: Add DSB ISHST prior to TLBI in __flush_tlb_[kernel_]pgtable() arm64: pgtable: Implement p[mu]d_valid() and check in set_p[mu]d() arm64: tlb: Justify non-leaf invalidation in flush_tlb_range() arm64: tlbflush: Allow stride to be specified for __flush_tlb_range() arm64: tlb: Remove redundant !CONFIG_HAVE_RCU_TABLE_FREE code asm-generic/tlb: Guard with #ifdef CONFIG_MMU asm-generic/tlb: Track which levels of the page tables have been cleared arm64: tlb: Adjust stride and type of TLBI according to mmu_gather arm64: tlb: Avoid synchronous TLBIs when freeing page tables arm64: tlb: Rewrite stale comment in asm/tlbflush.h arch/arm64/Kconfig | 1 + arch/arm64/include/asm/pgtable.h | 10 +++- arch/arm64/include/asm/tlb.h | 34 +++++------- arch/arm64/include/asm/tlbflush.h | 112 ++++++++++++++++++++++++-------------- include/asm-generic/tlb.h | 85 +++++++++++++++++++++++++---- mm/memory.c | 4 +- 6 files changed, 168 insertions(+), 78 deletions(-) -- 2.1.4
