Merge tag 'kvm-x86-mmio-6.17' of https://github.com/kvm-x86/linux into HEAD

KVM MMIO Stale Data mitigation cleanup for 6.17

Rework KVM's mitigation for the MMIO State Data vulnerability to track
whether or not a vCPU has access to (host) MMIO based on the MMU that will be
used when running in the guest.  The current approach doesn't actually detect
whether or not a guest has access to MMIO, and is prone to false negatives (and
to a lesser extent, false positives), as KVM_DEV_VFIO_FILE_ADD is optional, and
obviously only covers VFIO devices.

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