Support 4 levels of translation tables for ARM64

Hi All,

This v6 patchset supports 4 levels of tranlsation tables for ARM64.

Firstly, the patchset introduces virtual address space size and translation level options as taking account into the comment from Catalin Marinas:
http://www.spinics.net/linux/lists/arm-kernel/msg319552.html

Then, it implements 4 levels of translation tables for native.

A dynamic VTTBR_X configuration is added before implementing 4 levels for both HYP and stage2 sides.

All ARMv8 and ARMv7 related changes are validated with FastModels+kvmtool and A15+QEMU, respectively.

Changes since v1:
- fixed unmatched data types as per Steve's comment
- removed unnecessary #ifdef in arch/arm64/mm/* as per Steve's comment
- revised create_pgd_entry to deal with PUD entry as per Steve's comment
- introduced a macro for initial memblock limit as per Steve's comment
- dropped "Fix line length exceeding 80 characters" patch as per Marc's comment
- removed unnecessary #ifdef in arch/arm/kvm/mmu.c as per Marc's comment
- added a macro for a number of objects of as per Marc's comment

Changes since v2:
- revised some macros in a generic way as per Marc's comment
- added a 2 level option for kvm mmu cache allocation as per Marc's comment

Changes since v3:
- added #ifdef to decide swapper and idmap size as per Steve's comment
- introduced Steve's create_pgd_entry

Changes since v4:
- hided translation level options from menuconfig as per Catalin's comment
- dropped some printk changes as per Mitchel's comment
- squashed VA_BITS related patches into a single patch

Changes since v5:
- added dynamic VTTBR_X configuration logic
- removed a redundant logic in stage2_set_pte as per Christoffer's comment
- added comments for create_pud_entry as per Christoffer and Steve's comment
- fixed typos in 4 level descriptions as per Christoffer's comment
- revised arm64 Kconfig help message as per Christoffer's comment
- rebased on top of for-next/core branch of arm64/linux.git

Jungseok Lee (7):
arm64: Use pr_* instead of printk
arm64: Introduce VA_BITS and translation level options
arm64: Add a description on 48-bit address space with 4KB pages
arm64: Add 4 levels of page tables definition with 4KB pages
arm64: mm: Implement 4 levels of translation tables
arm64: KVM: Set physical address size related factors in runtime
arm64: KVM: Implement 4 levels of translation tables for HYP and
stage2

 Documentation/arm64/memory.txt                |   59 +++++++++++++---
 arch/arm/include/asm/kvm_mmu.h                |   10 +++
 arch/arm/kvm/arm.c                            |   90 ++++++++++++++++++++++++-
 arch/arm/kvm/mmu.c                            |   77 ++++++++++++++++++---
 arch/arm64/Kconfig                            |   53 ++++++++++++++-
 arch/arm64/include/asm/kvm_arm.h              |   29 ++++----
 arch/arm64/include/asm/kvm_mmu.h              |   12 ++++
 arch/arm64/include/asm/memblock.h             |    6 ++
 arch/arm64/include/asm/memory.h               |    6 +-
 arch/arm64/include/asm/page.h                 |    6 +-
 arch/arm64/include/asm/pgalloc.h              |   24 ++++++-
 arch/arm64/include/asm/pgtable-4level-hwdef.h |   50 ++++++++++++++
 arch/arm64/include/asm/pgtable-4level-types.h |   71 +++++++++++++++++++
 arch/arm64/include/asm/pgtable-hwdef.h        |    8 ++-
 arch/arm64/include/asm/pgtable.h              |   53 +++++++++++++--
 arch/arm64/include/asm/tlb.h                  |   11 ++-
 arch/arm64/kernel/head.S                      |   54 ++++++++++++---
 arch/arm64/kernel/traps.c                     |   13 ++--
 arch/arm64/kvm/hyp-init.S                     |   20 ++++--
 arch/arm64/mm/fault.c                         |    1 +
 arch/arm64/mm/mmu.c                           |   16 +++--
 21 files changed, 592 insertions(+), 77 deletions(-)
 create mode 100644 arch/arm64/include/asm/pgtable-4level-hwdef.h
 create mode 100644 arch/arm64/include/asm/pgtable-4level-types.h

1.7.10.4