The following two patches fixup some missing memory handling in
KVM/arm64.

The first patch supports 48 bit virtual address space which involves
supporting a different number of levels of page tables in the host
kernel and the stage-2 page tables.

The second patch ensures userspace cannot create memory slots with too
large IPA space given VTCR_EL2.T0SZ = 24.

Finally, we enable 48-bit VA support in Linux.

The following host configurations have been tested with KVM on APM
Mustang:

 1)  4KB  + 39 bits VA space
 2)  4KB  + 48 bits VA space
 3) 64KB  + 39 bits VA space
 4) 64KB  + 48 bits VA space

Tested on TC2 for regressions.

Christoffer Dall (3):
  arm64: KVM: Implement 48 VA support for KVM EL2 and Stage-2
  arm/arm64: KVM: Ensure memslots are within KVM_PHYS_SIZE
  arm64: Allow 48-bits VA space without ARM_SMMU

 arch/arm/include/asm/kvm_mmu.h   |  23 +++++++
 arch/arm/kvm/arm.c               |   2 +-
 arch/arm/kvm/mmu.c               | 140 +++++++++++++++++++++++++++++++--------
 arch/arm64/Kconfig               |   2 +-
 arch/arm64/include/asm/kvm_mmu.h | 128 +++++++++++++++++++++++++++++++++--
 5 files changed, 259 insertions(+), 36 deletions(-)

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2.1.2.330.g565301e.dirty