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    Subject[PATCH v3 0/5] mtrr, mm, x86: Enhance MTRR checks for huge I/O mapping
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    This patchset enhances MTRR checks for the kernel huge I/O mapping,
    which was enabled by the patchset below:
    https://lkml.org/lkml/2015/3/3/589

    The following functional changes are made in patch 5/5.
    - Allow pud_set_huge() and pmd_set_huge() to create a huge page
    mapping to a range covered by a single MTRR entry of any memory
    type.
    - Log a pr_warn() message when a specified PMD map range spans more
    than a single MTRR entry. Drivers should make a mapping request
    aligned to a single MTRR entry when the range is covered by MTRRs.

    Patch 1/5 addresses other review comments to the mapping funcs for
    better code read-ability. Patch 2/5 - 4/5 are bug fixes and clean up
    to mtrr_type_lookup().

    The patchset is based on the -mm tree.
    ---
    v3:
    - Add patch 3/5 to fix a bug in MTRR state checks.
    - Update patch 4/5 to create separate functions for the fixed and
    variable entries. (Ingo Molnar)

    v2:
    - Update change logs and comments per review comments.
    (Ingo Molnar)
    - Add patch 3/4 to clean up mtrr_type_lookup(). (Ingo Molnar)

    ---
    Toshi Kani (5):
    1/5 mm, x86: Document return values of mapping funcs
    2/5 mtrr, x86: Fix MTRR lookup to handle inclusive entry
    3/5 mtrr, x86: Fix MTRR state checks in mtrr_type_lookup()
    4/5 mtrr, x86: Clean up mtrr_type_lookup()
    5/5 mtrr, mm, x86: Enhance MTRR checks for KVA huge page mapping

    ---
    arch/x86/Kconfig | 2 +-
    arch/x86/include/asm/mtrr.h | 5 +-
    arch/x86/include/uapi/asm/mtrr.h | 4 +
    arch/x86/kernel/cpu/mtrr/generic.c | 181 ++++++++++++++++++++++++-------------
    arch/x86/mm/pat.c | 4 +-
    arch/x86/mm/pgtable.c | 53 ++++++++---
    6 files changed, 165 insertions(+), 84 deletions(-)


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