[PULL v2][Trusty] arm64: EFI stub support

[dann frazier]

This is a resubmittal of the arm64 EFI stub support changes.

v2 changes:
     * Use git cherry-pick -x to generate clean cherry pick commits.
     * Use "backported from" notation when cherry picks are not clean.
     * Add a [Config] commit, generated by updateconfigs.
     * Other than the config update, code is identical to the
       arm64-efi branch from the initial submission.

The following changes since commit ca13cad7da7caa499f54e2d2bd458b2441276fe1:

  Linux 3.13.11-ckt18 (2015-04-07 12:22:35 -0700)

are available in the git repository at:

  git://kernel.ubuntu.com/dannf/trusty-xgene.git arm64-efi-cleaner

for you to fetch changes up to 54216ebf255273dcefba57b49569b63651b5e9da:

  arm64: efi: only attempt efi map setup if booting via EFI (2015-04-23 08:23:23 -0600)

----------------------------------------------------------------
Ard Biesheuvel (1):
      efi/arm64: ignore dtb= when UEFI SecureBoot is enabled

Leif Lindholm (2):
      doc: arm: add UEFI support documentation
      arm64: efi: only attempt efi map setup if booting via EFI

Marc Zyngier (1):
      arm64: fixmap: fix missing sub-page offset for earlyprintk

Mark Salter (11):
      add generic fixmap.h
      mm: create generic early_ioremap() support
      arm64: initialize pgprot info earlier in boot
      arm64: add early_ioremap support
      efi: create memory map iteration helper
      lib: add fdt_empty_tree.c
      efi: add helper function to get UEFI params from FDT
      arm64: Add function to create identity mappings
      arm64: add EFI runtime services
      arm64: efi: add EFI stub
      doc: arm64: add description of EFI stub support

Roy Franz (3):
      efi: Add get_dram_base() helper function
      doc: efi-stub.txt updates for ARM
      efi: Add shared FDT related functions for ARM/ARM64

dann frazier (3):
      UBUNTU: [Config] CONFIG_{EFI_PARAMS_FROM_FDT,GENERIC_EARLY_IOREMAP,LIBFDT}=y
      UBUNTU: Move get_dram_base to arm private file
      UBUNTU: arm64: Implement efi_enabled()

 Documentation/arm/00-INDEX                |   2 +
 Documentation/arm/uefi.txt                |  64 ++++
 Documentation/arm64/booting.txt           |   4 +
 Documentation/arm64/memory.txt            |   4 +-
 Documentation/efi-stub.txt                |  33 ++-
 arch/arm64/Kconfig                        |  17 ++
 arch/arm64/include/asm/Kbuild             |   1 +
 arch/arm64/include/asm/efi.h              |  15 +
 arch/arm64/include/asm/fixmap.h           |  67 +++++
 arch/arm64/include/asm/io.h               |   1 +
 arch/arm64/include/asm/memory.h           |   2 +-
 arch/arm64/include/asm/mmu.h              |   3 +
 arch/arm64/kernel/Makefile                |   3 +
 arch/arm64/kernel/early_printk.c          |   4 +-
 arch/arm64/kernel/efi-entry.S             | 109 +++++++
 arch/arm64/kernel/efi-stub.c              |  87 ++++++
 arch/arm64/kernel/efi.c                   | 478 ++++++++++++++++++++++++++++++
 arch/arm64/kernel/head.S                  | 121 +++++++-
 arch/arm64/kernel/setup.c                 |   9 +
 arch/arm64/mm/ioremap.c                   |  86 +++++-
 arch/arm64/mm/mmu.c                       |  99 +++----
 debian.master/config/config.common.ubuntu |   3 +
 drivers/firmware/efi/Kconfig              |   7 +
 drivers/firmware/efi/arm-stub.c           | 291 ++++++++++++++++++
 drivers/firmware/efi/efi-stub-helper.c    |   7 +
 drivers/firmware/efi/efi.c                |  79 +++++
 drivers/firmware/efi/fdt.c                | 285 ++++++++++++++++++
 include/asm-generic/early_ioremap.h       |  42 +++
 include/asm-generic/fixmap.h              | 100 +++++++
 include/linux/efi.h                       |  20 +-
 lib/Makefile                              |   3 +-
 lib/fdt_empty_tree.c                      |   2 +
 mm/Kconfig                                |   3 +
 mm/Makefile                               |   1 +
 mm/early_ioremap.c                        | 245 +++++++++++++++
 35 files changed, 2221 insertions(+), 76 deletions(-)
 create mode 100644 Documentation/arm/uefi.txt
 create mode 100644 arch/arm64/include/asm/efi.h
 create mode 100644 arch/arm64/include/asm/fixmap.h
 create mode 100644 arch/arm64/kernel/efi-entry.S
 create mode 100644 arch/arm64/kernel/efi-stub.c
 create mode 100644 arch/arm64/kernel/efi.c
 create mode 100644 drivers/firmware/efi/arm-stub.c
 create mode 100644 drivers/firmware/efi/fdt.c
 create mode 100644 include/asm-generic/early_ioremap.h
 create mode 100644 include/asm-generic/fixmap.h
 create mode 100644 lib/fdt_empty_tree.c
 create mode 100644 mm/early_ioremap.c