[PATCH v7 00/16] ARM: Add support for the Large Physical Address Extensions

[Catalin Marinas]

Hi,

This is version 7 of the set of patches adding support for the Large
Physical Address Extensions on the ARM architecture (available with the
Cortex-A15 processor). LPAE comes with a new 3-level page table format
(compared to 2-level for the classic one), allowing up to 40-bit
physical address space.

This set of patches against Linux 3.1-rc1 is available on this branch:

git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-2.6-cm.git for-next

The full set of patches against Linux 3.0 (LPAE, support for an emulated
Versatile Express with Cortex-A15 tile and generic timers) is available
on this branch:

git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-2.6-cm.git arm-lpae


Changelog (from v6):

- Rebased against Linux 3.1-rc1.
- pteval_t, pmdval_t etc. typedefs reworked for consistency.
- __phys_to_virt/__virt_to_phys macros typecasting patch removed (an
  explicit cast to unsigned long has been added to dma_to_virt).
- Generic dma_addr_t patch removed (already fixed upstream).

Known issues:

- RMK's nopud patch not in mainline yet (compiler warnings) but carried
  over in the above branches.
- No decission on using the ISB during MMU enabling (no simple
  alternative solution).
- The patch converting PGDIR_* to PMD_* may be further modified
  depending on the merging of the DMA coherent patches and other changes
  to prepare_page_tables() proposed by RMK.


Catalin Marinas (13):
  ARM: LPAE: Cast the dma_addr_t argument to unsigned long in
    dma_to_virt
  ARM: LPAE: Use PMD_(SHIFT|SIZE|MASK) instead of PGDIR_*
  ARM: LPAE: Factor out 2-level page table definitions into separate
    files
  ARM: LPAE: Add (pte|pmd)val_t type definitions as u32
  ARM: LPAE: Use a mask for physical addresses in page table entries
  ARM: LPAE: Introduce the 3-level page table format definitions
  ARM: LPAE: Page table maintenance for the 3-level format
  ARM: LPAE: MMU setup for the 3-level page table format
  ARM: LPAE: Invalidate the TLB before freeing the PMD
  ARM: LPAE: Add fault handling support
  ARM: LPAE: Add context switching support
  ARM: LPAE: Add identity mapping support for the 3-level page table
    format
  ARM: LPAE: Add the Kconfig entries

Will Deacon (3):
  ARM: LPAE: add ISBs around MMU enabling code
  ARM: LPAE: mark memory banks with start > ULONG_MAX as highmem
  ARM: LPAE: add support for ATAG_MEM64

 arch/arm/Kconfig                            |    2 +-
 arch/arm/boot/compressed/head.S             |    1 +
 arch/arm/include/asm/assembler.h            |   11 +
 arch/arm/include/asm/dma-mapping.h          |    2 +-
 arch/arm/include/asm/page.h                 |   44 +---
 arch/arm/include/asm/pgalloc.h              |   28 ++-
 arch/arm/include/asm/pgtable-2level-hwdef.h |   93 ++++++
 arch/arm/include/asm/pgtable-2level-types.h |   67 +++++
 arch/arm/include/asm/pgtable-2level.h       |  143 +++++++++
 arch/arm/include/asm/pgtable-3level-hwdef.h |   82 ++++++
 arch/arm/include/asm/pgtable-3level-types.h |   70 +++++
 arch/arm/include/asm/pgtable-3level.h       |  107 +++++++
 arch/arm/include/asm/pgtable-hwdef.h        |   81 +-----
 arch/arm/include/asm/pgtable.h              |  211 +++++---------
 arch/arm/include/asm/proc-fns.h             |   21 ++
 arch/arm/include/asm/setup.h                |    8 +
 arch/arm/include/asm/tlb.h                  |   11 +-
 arch/arm/include/asm/tlbflush.h             |    4 +-
 arch/arm/kernel/head.S                      |  119 ++++++---
 arch/arm/kernel/module.c                    |    2 +-
 arch/arm/kernel/setup.c                     |   10 +
 arch/arm/kernel/sleep.S                     |    2 +
 arch/arm/mm/Kconfig                         |   13 +
 arch/arm/mm/Makefile                        |    4 +
 arch/arm/mm/alignment.c                     |    8 +-
 arch/arm/mm/context.c                       |   19 +-
 arch/arm/mm/dma-mapping.c                   |    6 +-
 arch/arm/mm/fault.c                         |   87 ++++++
 arch/arm/mm/idmap.c                         |   36 +++-
 arch/arm/mm/ioremap.c                       |    8 +-
 arch/arm/mm/mm.h                            |    4 +-
 arch/arm/mm/mmu.c                           |   53 +++-
 arch/arm/mm/pgd.c                           |   51 +++-
 arch/arm/mm/proc-macros.S                   |    5 +-
 arch/arm/mm/proc-v7lpae.S                   |  422 +++++++++++++++++++++++++++
 35 files changed, 1504 insertions(+), 331 deletions(-)
 create mode 100644 arch/arm/include/asm/pgtable-2level-hwdef.h
 create mode 100644 arch/arm/include/asm/pgtable-2level-types.h
 create mode 100644 arch/arm/include/asm/pgtable-2level.h
 create mode 100644 arch/arm/include/asm/pgtable-3level-hwdef.h
 create mode 100644 arch/arm/include/asm/pgtable-3level-types.h
 create mode 100644 arch/arm/include/asm/pgtable-3level.h
 create mode 100644 arch/arm/mm/proc-v7lpae.S