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    Implementing firmware runtime services in a computer system
    12.
    发明授权
    Implementing firmware runtime services in a computer system 有权

    公开(公告)号：US11042485B2

    公开(公告)日：2021-06-22

    申请号：US16013263

    申请日：2018-06-20

    Applicant: VMware, Inc.

    Inventor： Andrei Warkentin ,  Cyprien Laplace ,  Alexander Fainkichen ,  Ye Li ,  Regis Duchesne

    IPC: G06F12/10 ,  G06F9/455

    Abstract: An example method of implementing firmware runtime services in a computer system having a processor with a plurality of hierarchical privilege levels, the method including: calling, from software executing at a first privilege level of the processor, a runtime service stub in a firmware of the computer system; executing, by the runtime service stub, an upcall instruction from the first privilege level to a second privilege level of the processor that is more privileged than the first privilege level; and executing, by a handler, a runtime service at the second privilege level in response to execution of the upcall instruction.

    Guest time scaling for a virtual machine in a virtualized computer system
    14.
    发明授权
    Guest time scaling for a virtual machine in a virtualized computer system 有权

    公开(公告)号：US12248799B2

    公开(公告)日：2025-03-11

    申请号：US17553607

    申请日：2021-12-16

    Applicant: VMware, Inc.

    Inventor： Andrei Warkentin ,  Ye Li ,  Alexander Fainkichen ,  Regis Duchesne ,  Cyprien Laplace ,  Shruthi Muralidhara Hiriyuru ,  Sunil Kumar Kotian

    IPC: G06F9/455

    Abstract: An example method of managing guest time for a virtual machine (VM) supported by a hypervisor of a virtualized host computer includes: configuring, by the hypervisor, a central processing unit (CPU) of the host computer to trap, to the hypervisor, access by guest code in the VM to a physical counter and timer of the CPU; configuring, by the hypervisor, the guest code in the VM to use the physical counter and timer of the CPU rather than a virtual counter and timer of the CPU; trapping, at the hypervisor, an access to the physical counter and timer by the guest code; and executing, by the hypervisor, the access to the physical counter and timer on behalf of the guest code while compensating for an adjustment of a system count of the physical counter and timer to maintain the guest time as scaled with respect to frequency of the physical counter and timer.

    Method for converting device tree data into ACPI data for edge device operating in a network
    16.
    发明授权
    Method for converting device tree data into ACPI data for edge device operating in a network 有权

    公开(公告)号：US11263019B2

    公开(公告)日：2022-03-01

    申请号：US16521434

    申请日：2019-07-24

    Applicant: VMware, Inc.

    Inventor： Andrei Warkentin ,  Cyprien Laplace ,  Ye Li ,  Alexander Fainkichen ,  Regis Duchesne

    IPC: G06F15/177 ,  G06F9/00 ,  G06F9/4401 ,  G06F16/22

    Abstract: A method for generating boot tables for a device having access to device information. It is determined whether there exists at least one system boot table stored in a memory. If it is determined that a system boot table does not exist, the device information is retrieved, and the device information is converted to at least one boot table. The converting includes generating a first boot table by populating the first boot table with information of components of the device that have a correspondence to a computer system boot information standard. The generating also includes generating a second boot table for another component of the device that does not have a correspondence to the computer system boot information standard, by creating an entry in the second boot table that is populated with an identifier used to find a compatible component defined in the computer system boot standard.

    Virtualization detection in a computing system
    17.
    发明授权
    Virtualization detection in a computing system 有权

    公开(公告)号：US10698783B2

    公开(公告)日：2020-06-30

    申请号：US15865770

    申请日：2018-01-09

    Applicant: VMware, Inc.

    Inventor： Andrei Warkentin ,  Cyprien Laplace ,  Regis Duchesne ,  Ye Li ,  Alexander Fainkichen

    IPC: G06F9/455 ,  G06F11/30 ,  G06F13/10

    Abstract: A method of detecting virtualization in a computing system, which includes a processor having at least three hierarchical privilege levels including a third privilege level more privileged than a second privilege level, the second privilege level more privileged than a first privilege level, is described. The method includes: executing a program on the processor at a privilege level less privileged than the third privilege level, the program including a load-exclusive instruction of the processor, followed by at least one instruction of the processor capable of being trapped to the third privilege level, followed by a store-exclusive instruction of the processor; and determining presence or absence of virtualization software at least a portion of which executes at the third privilege level in response to a return status of the store-exclusive instruction.

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