CoreOS node running on s390x with Secure Execution is unable to boot: "swiotlb buffer is full"

Solution Verified - Updated -

Issue

  • Unable to boot RHEL or CoreOS 9.4 Guest with Secure Execution enabled.
  • Guest sometimes fails to boot with "swiotlb buffer is full" message.

Environment

  • Red Hat Enteprise Linux 9.4
    • kernel-5.14.0-427.33.1.el9_4
  • IBM s390x with Secure Execution enabled.

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