摘要:
In one embodiment, the present invention includes a method of transitioning control to guest software in a virtual machine from a virtual machine monitor, receiving control following a transition from the virtual machine to the virtual machine monitor upon an event, and determining whether to modify a state of the guest code, a state of the virtual machine monitor or a state of controls. If such a determination is made, the state may be modified and control is transitioned back to the guest software.
摘要:
A method of improving USB device virtualization to prevent bus bandwidth from being over allocated when isochronous USB devices are attached to multiple virtual machines by attaching a dummy device to each virtual machine which will mimic the bandwidth reservations made by real devices in other virtual machines, thus allowing each virtual machine to determine the true available bandwidth. The dummy devices are represented by incorporating a dummy device driver in each virtual machine and emulating the dummy device in software in the VMM.
摘要:
A system and method including, in some embodiments, receiving a request for a graphics memory address for an input/output (I/O) device assigned to a virtual machine in a system that supports virtualization, and installing, in a graphics memory translation table, a physical guest graphics memory address to host physical memory address translation.
摘要:
In accordance with some embodiments, a protected execution environment may be defined for a graphics processing unit. This framework not only protects the workloads from malware running on the graphics processing unit but also protects those workloads from malware running on the central processing unit. In addition, the trust framework may facilitate proof of secure execution by measuring the code and data structures used to execute the workload. If a part of the trusted computing base of this framework or protected execution environment is compromised, that part can be patched remotely and the patching can be proven remotely throughout attestation in some embodiments.
摘要:
The disclosure describes a system and method for controlling interfacing parameters for a device when connected to a host. In the system and method, the communications interface is configurable to be in operable connection to a host using a microprocessor in the device having a first bus controller and a second bus controller, the second bus controller external to the microprocessor. The method comprises: establishing an initial connection by the device; conducting negotiations by the device to set a first data transmission rate for the device for the initial connection utilizing a communication bus controller contained in the microprocessor; and after detecting completion of enumeration of the device, re-establishing the connection by the device using the second bus controller in the device that processes the communications at a second transmission rate that is higher than the first data transmission rate.
摘要:
Various embodiments for a communication control configuration and a communication control method are described for wireless communication devices having at least two radios that can potentially interfere with one another. The control schemes described herein reduce the likelihood that the two radios will interfere with one another during operation.
摘要:
A walking cane device which supports a basket (2) and lid (7), permitting a storage area to transport objects. A support ring (4) and support columns (3) are secured to the shaft of the cane (1). The support columns (3) extend upwards and slightly outward of the shaft and along the sides of the basket (2), securing and stabilizing the basket (2) in place. A lid (7) is attached to the basket (2) by means of the attachment of the loops (6) to fasteners (5).
摘要:
A method, apparatus and system enable a virtual machine manager (“VMM”) to dynamically reassign physical devices from one virtual machine (“VM”) to another. The VMM may generate a message to the VM that currently owns the physical device and inform the device that the physical device is shutting down. The current VM may thereafter idle the physical device, unload the device driver and eject the device. The VMM may then inform another VM that the physical device is available, and the second VM may load the driver for the device.
摘要:
Embodiments of apparatuses and methods including virtual address memory range registers are disclosed. In one embodiment, a processor includes a memory interface, address translation hardware, and virtual memory address comparison hardware. The memory interface is to access a system memory using a physical memory address. The address translation hardware is to support translation of a virtual memory address to the physical memory address. The virtual memory address is used by software to access a virtual memory location in the virtual memory address space of the processor. The virtual memory address comparison hardware is to determine whether the virtual memory address is within a virtual memory address range.
摘要:
Embodiments of an invention for offloading functionality from a secure processing environment are disclosed. In one embodiment, a processor includes an instruction unit and an execution unit. The instruction unit is to receive an instruction to initialize a secure enclave. The execution unit is to execute the instruction. Execution of the instruction includes verifying that a signature structure key matches a hardware key that permits functionality to be offloaded.