Merge branch kvm-arm64/burn-the-flags into kvmarm-master/next

* kvm-arm64/burn-the-flags:
  : .
  : Rework the per-vcpu flags to make them more manageable,
  : splitting them in different sets that have specific
  : uses:
  :
  : - configuration flags
  : - input to the world-switch
  : - state bookkeeping for the kernel itself
  :
  : The FP tracking is also simplified and tracked outside
  : of the flags as a separate state.
  : .
  KVM: arm64: Move the handling of !FP outside of the fast path
  KVM: arm64: Document why pause cannot be turned into a flag
  KVM: arm64: Reduce the size of the vcpu flag members
  KVM: arm64: Add build-time sanity checks for flags
  KVM: arm64: Warn when PENDING_EXCEPTION and INCREMENT_PC are set together
  KVM: arm64: Convert vcpu sysregs_loaded_on_cpu to a state flag
  KVM: arm64: Kill unused vcpu flags field
  KVM: arm64: Move vcpu WFIT flag to the state flag set
  KVM: arm64: Move vcpu ON_UNSUPPORTED_CPU flag to the state flag set
  KVM: arm64: Move vcpu SVE/SME flags to the state flag set
  KVM: arm64: Move vcpu debug/SPE/TRBE flags to the input flag set
  KVM: arm64: Move vcpu PC/Exception flags to the input flag set
  KVM: arm64: Move vcpu configuration flags into their own set
  KVM: arm64: Add three sets of flags to the vcpu state
  KVM: arm64: Add helpers to manipulate vcpu flags among a set
  KVM: arm64: Move FP state ownership from flag to a tristate
  KVM: arm64: Drop FP_FOREIGN_STATE from the hypervisor code

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