Patents by Inventor Xin David ZHANG

Xin David ZHANG 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).

  • Publication number: 20190087215
    Abstract: This disclosure generally relates to time and timer techniques that may be used to virtualize one or more virtual machines. In an example, it may be possible to save and restore a timer of a virtual machine while preserving timer information associated with the timer (e.g., an expiration time, whether the most recent expiration has been signaled, and the enable bit, etc.). For example, a first mode may enable restoring a timer based on a previously-existing enable bit, thereby retaining the state of the timer (e.g., whether the timer is programmed to fire and/or whether the most recent expiration has been signaled). By contrast, a second mode of setting a timer may automatically set the enable bit, thereby automatically enabling the timer to fire, as may be expected by a virtual machine when setting a timer.
    Type: Application
    Filed: January 19, 2018
    Publication date: March 21, 2019
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Aditya BHANDARI, Bruce J. SHERWIN, JR., Xin David ZHANG
  • Publication number: 20190087216
    Abstract: This disclosure generally relates to hypervisor memory virtualization. In an example, multiple page table stages may be used to provide a page table that may be used by a processor when processing a workload for a nested virtual machine. An intermediate (e.g., nested) hypervisor may request an additional page table stage from a parent hypervisor, which may be used to virtualize memory for one or more nested virtual machines managed by the intermediate hypervisor. Accordingly, a processor may use the additional page table stages to ultimately translate a virtual memory address for a nested virtual machine to a physical memory address.
    Type: Application
    Filed: January 19, 2018
    Publication date: March 21, 2019
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Aditya BHANDARI, Bruce J. SHERWIN, JR., Xin David ZHANG
  • Publication number: 20190087222
    Abstract: This disclosure generally relates to enabling a hypervisor of a host machine to provide virtual interrupts to select virtual processors or a set of virtual processors. More specifically, the present disclosure describes how interrupts may be provided to targeted virtual processors, regardless of where the virtual processors are currently executing. That is, when an interrupt is received, the interrupt may be delivered to a specified virtual processor regardless of which logical processor is currently hosting the virtual processor.
    Type: Application
    Filed: January 19, 2018
    Publication date: March 21, 2019
    Inventors: Aditya BHANDARI, Bruce J. SHERWIN, JR., Xin David ZHANG