公开(公告)号：US20140108860A1

公开(公告)日：2014-04-17

申请号：US14050322

申请日：2013-10-09

Applicant: VMware, Inc.

Inventor： Ole AGESEN ,  Michael COHEN ,  Jeffrey W. SHELDON

IPC: G06F11/14

CPC classification number: G06F11/1402 ,  G06F9/45516 ,  G06F11/004 ,  G06F2201/815 ,  G06F2201/82

Abstract: A system and method for reducing the likelihood of concurrency errors by identifying vulnerable segments of computer code and stalling other virtual machine threads of execution. According to one embodiment of the present invention, the vulnerable segment is identified at runtime, for example in a dynamic translator. According to another embodiment of the present invention, the vulnerable segment is identified ahead of time, for example in a static translator. According to yet another embodiment of the present invention, the vulnerable segment is identified in the binary translator of a virtual machine monitor.

Abstract translation: 通过识别计算机代码的易受攻击的部分并拖延执行其他虚拟机线程来减少并发错误的可能性的系统和方法。 根据本发明的一个实施例，在运行时识别易受攻击的段，例如在动态翻译器中。 根据本发明的另一个实施例，提前识别易受攻击的段，例如在静态转换器中。 根据本发明的另一个实施例，在虚拟机监视器的二进制转换器中识别易受攻击的段。

公开(公告)号：US20170371733A1

公开(公告)日：2017-12-28

申请号：US15192642

申请日：2016-06-24

Applicant: VMware, Inc.

Inventor： Radu RUGINA ,  Jeffrey W. SHELDON ,  James S. MATTSON, JR. ,  David DUNN

IPC: G06F11/07 ,  G06F21/52 ,  G06F9/455 ,  G06F3/06

CPC classification number: G06F11/0712 ,  G06F9/45558 ,  G06F11/073 ,  G06F11/0751 ,  G06F11/0793 ,  G06F21/52 ,  G06F2009/45583 ,  G06F2009/45587 ,  G06F2009/45591

Abstract: Guest memory data structures are read by one or more read operations which are set up to handle page faults and general protection faults generated during the read in various ways. If such a fault occurs while performing the one or more read operations, the fault is handled and the one or more read operation is terminated. The fault is handled by either dropping the fault and reporting an error instead of the fault, by dropping the fault and invoking an error handler that is set up prior to performing the read operations, or by forwarding the fault to a fault handler that is setup prior to performing the read operations. If no fault occurs, the read operations complete successfully. Thus, under normal circumstances, no fault is incurred in a read operation on guest memory data structures.

公开(公告)号：US20220066806A1

公开(公告)日：2022-03-03

申请号：US17002233

申请日：2020-08-25

Applicant: VMware, Inc.

Inventor： Arunachalam RAMANATHAN ,  Yanlei ZHAO ,  Anurekh SAXENA ,  Yury BASKAKOV ,  Jeffrey W. SHELDON ,  Gabriel TARASUK-LEVIN ,  David A. DUNN ,  Sreekanth SETTY

IPC: G06F9/455 ,  G06F9/50 ,  G06F12/1027

Abstract: A virtual machine (VM) is migrated from a source host to a destination host in a virtualized computing system, the VM having a plurality of virtual central processing units (CPUs). The method includes copying, by VM migration software executing in the source host and the destination host, memory of the VM from the source host to the destination host by installing, at the source host, write traces spanning all of the memory and then copying the memory from the source host to the destination host over a plurality of iterations; and performing switch-over, by the VM migration software, to quiesce the VM in the source host and resume the VM in the destination host. The VM migration software installs write traces using less than all of the virtual CPUs, and using trace granularity larger than a smallest page granularity.

公开(公告)号：US20170083360A1

公开(公告)日：2017-03-23

申请号：US15369470

申请日：2016-12-05

Applicant: VMware, Inc.

Inventor： Keith M. ADAMS ,  Jeffrey W. SHELDON ,  Vyacheslav V. MALYUGIN

IPC: G06F9/455

CPC classification number: G06F9/45558 ,  G06F9/45533 ,  G06F2009/45566 ,  G06F2009/45583 ,  G06F2009/45591

Abstract: Autonomous selection between multiple virtualization techniques implemented in a virtualization layer of a virtualized computer system. The virtual machine monitor implements multiple virtualization support processors that each provide for the comprehensive handling of potential virtualization exceptions. A virtual machine monitor resident virtualization selection control is operable to select between use of first and second virtualization support processors dependent on identifying a predetermined pattern of temporally local privilege dependent instructions within a portion of an instruction stream as encountered in the execution of a guest operating system.