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.

Date of Patent:
Sep. 07, 2021

Filed:

Feb. 26, 2018
Applicant:

Red Hat Israel, Ltd., Ra'anana, IL;

Inventors:

Michael Tsirkin, Lexington, MA (US);

Stefan Hajnoczi, St. Neots, GB;

Assignee:

Red Hat Israel, Ltd., Ra'anana, IL;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/455 (2018.01);
U.S. Cl.
CPC ...
G06F 9/45558 (2013.01); G06F 2009/45579 (2013.01); G06F 2009/45583 (2013.01);
Abstract

In an example embodiment, a hypervisor exposes a first guest device to a first virtual machine. The hypervisor exposes a virtual host device and a pass-through device to a second virtual machine. The hypervisor maps a first memory and a second memory into the second virtual machine at a first base address register and a second base address register associated with the virtual host device and pass-through device. The hypervisor sends a mapping from the first virtual machine to the second virtual machine. The hypervisor sends a first address of a first ring of the first guest device and a second address of a second ring of an assigned device to the second virtual machine.


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