Merge branch kvm-arm64/user_mem_abort-rework into kvmarm-master/next

* kvm-arm64/user_mem_abort-rework: (30 commits)
  : .
  : user_mem_abort() has become an absolute pain to maintain,
  : to the point that each single fix is likely to introduce
  : *two* new bugs.
  :
  : Deconstruct the whole thing in logical units, reducing
  : the amount of visible and/or mutable state between functions,
  : and finally making the code a bit more maintainable.
  : .
  KVM: arm64: Convert gmem_abort() to struct kvm_s2_fault_desc
  KVM: arm64: Simplify integration of adjust_nested_*_perms()
  KVM: arm64: Directly expose mapping prot and kill kvm_s2_fault
  KVM: arm64: Move device mapping management into kvm_s2_fault_pin_pfn()
  KVM: arm64: Replace force_pte with a max_map_size attribute
  KVM: arm64: Move kvm_s2_fault.{pfn,page} to kvm_s2_vma_info
  KVM: arm64: Restrict the scope of the 'writable' attribute
  KVM: arm64: Kill logging_active from kvm_s2_fault
  KVM: arm64: Move VMA-related information to kvm_s2_fault_vma_info
  KVM: arm64: Kill topup_memcache from kvm_s2_fault
  KVM: arm64: Kill exec_fault from kvm_s2_fault
  KVM: arm64: Kill write_fault from kvm_s2_fault
  KVM: arm64: Constrain fault_granule to kvm_s2_fault_map()
  KVM: arm64: Replace fault_is_perm with a helper
  KVM: arm64: Move fault context to const structure
  KVM: arm64: Make fault_ipa immutable
  KVM: arm64: Kill fault->ipa
  KVM: arm64: Clean up control flow in kvm_s2_fault_map()
  KVM: arm64: Hoist MTE validation check out of MMU lock path
  KVM: arm64: Optimize early exit checks in kvm_s2_fault_pin_pfn()
  ...

Signed-off-by: Marc Zyngier <maz@kernel.org>

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