Merge branch kvm-arm64/pkvm-vcpu-state into kvmarm-master/next

* kvm-arm64/pkvm-vcpu-state: (25 commits)
  : .
  : Large drop of pKVM patches from Will Deacon and co, adding
  : a private vm/vcpu state at EL2, managed independently from
  : the EL1 state. From the cover letter:
  :
  : "This is version six of the pKVM EL2 state series, extending the pKVM
  : hypervisor code so that it can dynamically instantiate and manage VM
  : data structures without the host being able to access them directly.
  : These structures consist of a hyp VM, a set of hyp vCPUs and the stage-2
  : page-table for the MMU. The pages used to hold the hypervisor structures
  : are returned to the host when the VM is destroyed."
  : .
  KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run()
  KVM: arm64: Don't unnecessarily map host kernel sections at EL2
  KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2
  KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2
  KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host
  KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache
  KVM: arm64: Instantiate guest stage-2 page-tables at EL2
  KVM: arm64: Consolidate stage-2 initialisation into a single function
  KVM: arm64: Add generic hyp_memcache helpers
  KVM: arm64: Provide I-cache invalidation by virtual address at EL2
  KVM: arm64: Initialise hypervisor copies of host symbols unconditionally
  KVM: arm64: Add per-cpu fixmap infrastructure at EL2
  KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1
  KVM: arm64: Add infrastructure to create and track pKVM instances at EL2
  KVM: arm64: Rename 'host_kvm' to 'host_mmu'
  KVM: arm64: Add hyp_spinlock_t static initializer
  KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h
  KVM: arm64: Add helpers to pin memory shared with the hypervisor at EL2
  KVM: arm64: Prevent the donation of no-map pages
  KVM: arm64: Implement do_donate() helper for donating memory
  ...

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

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