Merge branch kvm-arm64/debug-6.14 into kvmarm-master/next

* kvm-arm64/debug-6.14:
  : .
  : Large rework of the debug code to make it a bit less horrid,
  : courtesy of Oliver Upton. From the original cover letter:
  :
  : "The debug code has become a bit difficult to reason about, especially
  : all the hacks and bandaids for state tracking + trap configuration.
  :
  : This series reworks the entire mess around using a single enumeration to
  : track the state of the debug registers (free, guest-owned, host-owned),
  : using that to drive trap configuration and save/restore.
  :
  : On top of that, this series wires most of the implementation into vCPU
  : load/put rather than the main KVM_RUN loop. This has been a long time
  : coming for VHE, as a lot of the trap configuration and EL1 state gets
  : loaded into hardware at that point anyway.
  :
  : The save/restore of the debug registers is simplified quite a bit as
  : well. KVM will now restore the registers for *any* access rather than
  : just writes, and keep doing so until the next vcpu_put() instead of
  : dropping it on the floor after the next exception."
  : .
  KVM: arm64: Promote guest ownership for DBGxVR/DBGxCR reads
  KVM: arm64: Fold DBGxVR/DBGxCR accessors into common set
  KVM: arm64: Avoid reading ID_AA64DFR0_EL1 for debug save/restore
  KVM: arm64: nv: Honor MDCR_EL2.TDE routing for debug exceptions
  KVM: arm64: Manage software step state at load/put
  KVM: arm64: Don't hijack guest context MDSCR_EL1
  KVM: arm64: Compute MDCR_EL2 at vcpu_load()
  KVM: arm64: Reload vCPU for accesses to OSLAR_EL1
  KVM: arm64: Use debug_owner to track if debug regs need save/restore
  KVM: arm64: Remove vestiges of debug_ptr
  KVM: arm64: Remove debug tracepoints
  KVM: arm64: Select debug state to save/restore based on debug owner
  KVM: arm64: Clean up KVM_SET_GUEST_DEBUG handler
  KVM: arm64: Evaluate debug owner at vcpu_load()
  KVM: arm64: Write MDCR_EL2 directly from kvm_arm_setup_mdcr_el2()
  KVM: arm64: Move host SME/SVE tracking flags to host data
  KVM: arm64: Track presence of SPE/TRBE in kvm_host_data instead of vCPU
  KVM: arm64: Get rid of __kvm_get_mdcr_el2() and related warts
  KVM: arm64: Drop MDSCR_EL1_DEBUG_MASK

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

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