[PATCH 0/5] Only create direct mappings for E820_RAM regions

[Jacob Shin <jacob.shin@amd.com>]

This is a revision of an earlier attempt, with suggestions and concernes
from previous conversation (https://lkml.org/lkml/2011/12/16/486) taken
into account.

The following patchset creates direct mappings only for E820_RAM regions
between 0 ~ max_low_pfn and 4GB ~ max_pfn. And leaves non-E820_RAM
unmapped.

Jacob Shin (5):
  x86: Only direct map addresses that are marked as E820_RAM
  x86: find_early_table_space based on memory ranges that are being
    mapped
  x86: Keep track of direct mapped pfn ranges
  x86: Fixup code testing if a pfn is direct mapped
  x86: Move enabling of PSE and PGE out of init_memory_mapping

 arch/x86/include/asm/page_types.h |    9 ++++
 arch/x86/kernel/amd_gart_64.c     |    4 +-
 arch/x86/kernel/cpu/amd.c         |    6 +--
 arch/x86/kernel/setup.c           |   97 ++++++++++++++++++++++++++++++++++---
 arch/x86/mm/init.c                |   67 ++++++++++++-------------
 arch/x86/mm/init_64.c             |    3 +-
 arch/x86/platform/efi/efi.c       |    8 +--
 arch/x86/platform/efi/efi_64.c    |    2 +
 8 files changed, 139 insertions(+), 57 deletions(-)

-- 
1.7.9.5