Merge branch kvm-arm64/pkvm-state-7.4 into kvmarm-master/next

* kvm-arm64/pkvm-state-7.4:
  : \
  : State protection for protected pKVM guests, finally starting to deliver
  : on its promises... Patches courtesy of Fuad Tabba.
  :
  : "Following the vCPU state-sync series, this series completes the
  : job for protected VMs: a protected guest's register state stays at
  : EL2, and the host sees only what handling each exit requires."
  : /
  KVM: arm64: Only emulate an SError's entry for vCPUs with NV
  KVM: arm64: Document the protected VM userspace API
  KVM: arm64: Advertise the capabilities that protected VMs support
  KVM: arm64: Reject host power-on of a vCPU that EL2 holds powered off
  KVM: arm64: Reject host access to protected VM private state
  KVM: arm64: Add per-EC entry/exit state marshalling for protected guests
  KVM: arm64: Inject an UNDEF at EL2 for unhandled protected guest exits
  KVM: arm64: Prevent host PC adjustments for protected vCPUs
  KVM: arm64: Restrict KVM_ARM_VCPU_INIT and PSCI version for protected VMs
  KVM: arm64: Handle PSCI calls for protected VMs at EL2
  KVM: arm64: Implement HVC handling for protected guests at EL2
  KVM: arm64: Add system register reset framework for protected VMs
  KVM: arm64: Add {flush,sync}_hyp_timer_state() primitives
  KVM: arm64: Skip fixed-feature state flush for protected vCPUs
  KVM: arm64: Introduce per-EC entry handlers for pKVM
  KVM: arm64: Disable steal time for protected VMs
  KVM: arm64: Pin the host vCPU before adjusting its PC under pKVM
  KVM: arm64: Validate the host vCPU's VM before reading it under pKVM
  KVM: arm64: Sync HCR_EL2.VSE back to the host vCPU under pKVM

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

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