[RFC,0/3] iommu/io-pgtable-arm-v7s: Use DMA32 zone for page tables

Message

Nicolas Boichat Nov. 9, 2018, 8:24 a.m. UTC

This is a follow-up to the discussion in [1], to make sure that the page tables
allocated by iommu/io-pgtable-arm-v7s are contained within 32-bit physical
address space.

[1] https://lists.linuxfoundation.org/pipermail/iommu/2018-November/030876.html

Nicolas Boichat (3):
  mm: When CONFIG_ZONE_DMA32 is set, use DMA32 for SLAB_CACHE_DMA
  include/linux/gfp.h: Add __get_dma32_pages macro
  iommu/io-pgtable-arm-v7s: Request DMA32 memory, and improve debugging

 drivers/iommu/io-pgtable-arm-v7s.c |  6 ++++--
 include/linux/gfp.h                |  2 ++
 include/linux/slab.h               | 13 ++++++++++++-
 mm/slab.c                          |  2 +-
 mm/slub.c                          |  2 +-
 5 files changed, 20 insertions(+), 5 deletions(-)