The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2023
Filed:
Feb. 26, 2020
Red Hat, Inc., Raleigh, NC (US);
Michael Tsirkin, Lexington, MA (US);
Paolo Bonzini, Milan, IT;
Red Hat, Inc., Raleigh, NC (US);
Abstract
A hypervisor identifies a memory address associated with a device slot of a communication bus; determines that the device slot of the communication bus is not associated with any of one or more devices; generates a memory page for the memory address, wherein the memory page comprises a value that indicates that the memory address is not associated with any of the devices; maps, in a page table, a page table entry for the memory page to the memory address, wherein the page table entry indicates that the memory page is read only for a guest operating system (OS) of a virtual machine (VM); and causes the memory page to be provided to the guest OS of the VM in view of a read access of the memory address by the guest OS.