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:
Oct. 28, 2025
Filed:
Feb. 04, 2022
Red Hat, Inc., Raleigh, NC (US);
Michael Tsirkin, Haifa, IL;
Amnon Ilan, Raanana, IL;
Red Hat, Inc., Raleigh, NC (US);
Abstract
Peripheral component interface (PCI) cards can be used to coordinate timer access for virtual machines. For example, a computing device can send, by a virtual machine deployed by a hypervisor, a request for a timer. A guest driver can write a timer for the virtual machine into a first portion of memory on a PCI card. The first portion of memory can be mapped to the virtual machine by the hypervisor. The computing device can receive a card interrupt for the timer. The computing device can translate the card interrupt into a timer interrupt. For example, the card interrupt may be received and translated by the hypervisor or the guest driver. The computing device can inject the timer interrupt to the virtual machine. In some examples, the virtual machine may receive the timer interrupt without exiting to the hypervisor.