Patents by Inventor Christopher Brian Wallis

Christopher Brian Wallis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preserving transient address translation information across a firmware assisted dump procedure
    Patent number: 11281483
    Abstract: Within a hashed page table maintained by a hypervisor, a special host real address configured to access a hardware device using access data intended to be invalidated is identified as part of a firmware assisted dump process for a virtual machine executing on the hypervisor. The special host real address is translated to a corresponding special guest real address. Within the hashed page table, the special host real address is replaced with the corresponding special guest real address, and the corresponding special guest real address is marked as invalid and requiring special handling. Subsequent to the replacing, the special host real address is invalidated. The special guest real address and translated address information are provided to the virtual machine subsequent to the invalidating, the translated address information comprising a set of host real addresses translated to corresponding guest real addresses.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: March 22, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Christopher Brian Wallis, Wade Byron Ouren, Stuart Zachary Jacobs, Troy David Armstrong, Kenneth Charles Vossen
  • PRESERVING TRANSIENT ADDRESS TRANSLATION INFORMATION ACROSS A FIRMWARE ASSISTED DUMP PROCEDURE
    Publication number: 20210117215
    Abstract: Within a hashed page table maintained by a hypervisor, a special host real address configured to access a hardware device using access data intended to be invalidated is identified as part of a firmware assisted dump process for a virtual machine executing on the hypervisor. The special host real address is translated to a corresponding special guest real address. Within the hashed page table, the special host real address is replaced with the corresponding special guest real address, and the corresponding special guest real address is marked as invalid and requiring special handling. Subsequent to the replacing, the special host real address is invalidated. The special guest real address and translated address information are provided to the virtual machine subsequent to the invalidating, the translated address information comprising a set of host real addresses translated to corresponding guest real addresses.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 22, 2021
    Applicant: International Business Machines Corporation
    Inventors: Christopher Brian Wallis, Wade Byron Ouren, Stuart Zachary Jacobs, Troy David Armstrong, Kenneth Charles Vossen