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. 01, 2019
Filed:
Sep. 06, 2016
Vmware, Inc., Palo Alto, CA (US);
Wei Xu, Palo Alto, CA (US);
Alok Nemchand Kataria, Pune, IN;
Jeffrey W. Sheldon, Palo Alto, CA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
Mechanisms to protect the integrity of memory of a virtual machine are provided. The mechanisms involve utilizing certain capabilities of the hypervisor underlying the virtual machine to monitor writes to memory pages of the virtual machine. A guest integrity driver communicates with the hypervisor to request such functionality. Additional protections are provided for protecting the guest integrity driver and associated data, as well as for preventing use of these mechanisms by malicious software. These additional protections include an elevated execution mode, termed 'integrity mode,' as well as protections on the memory pages that store the guest integrity driver. To prevent spurious alerts associated with the GI driver accessing its own data, the hypervisor maintains two page tables. In one copy, pages storing data for the GI driver are not protected and in the other, those pages are protected. The hypervisor switches the page tables when entering and exiting integrity mode.