摘要:
Virtual-machine-monitor operation and implementation is facilitated by number of easily implemented features and extensions added to the features of a processor architecture. These features, one or more of which are used in various embodiments of the present invention, include a vmsw instruction that provides a means for transitioning between virtualization mode and non-virtualization mode without an interruption, a virtualization fault that faults on an attempt by a priority-0 routine in virtualization mode attempting to execute a privileged instruction, and a flexible highest-implemented-address mechanism to partition virtual address space into a virtualization address space and a non-virtualization address space.
摘要:
Virtual-machine-monitor operation and implementation is facilitated by number of easily implemented features and extensions added to the features of a processor architecture. These features, one or more of which are used in various embodiments of the present invention, include a vmsw instruction that provides a means for transitioning between virtualization mode and non-virtualization mode without an interruption, a virtualization fault that faults on an attempt by a priority-0 routine in virtualization mode attempting to execute a privileged instruction, and a flexible highest-implemented-address mechanism to partition virtual address space into a virtualization address space and a non-virtualization address space.
摘要:
At least one entry in an original interrupt vector table is replaced with an instruction set to handle access to a privileged resource. An operating system privilege level is modified to one or more resources. Subsequent access to the privileged resource causes an interrupt. Processing of the interrupt is directed to the instruction set to handle access to the privileged resource.
摘要:
Embodiments of apparatuses and methods for improving performance in a virtualization architecture are disclosed. In one embodiment, an apparatus includes a processor and a processor abstraction layer. The processor abstraction layer includes instructions that, when executed by the processor, support techniques to improve the performance of the apparatus in a virtualization architecture.
摘要:
Embodiments of apparatuses and methods for improving performance in a virtualization architecture are disclosed. In one embodiment, an apparatus includes a processor and a processor abstraction layer. The processor abstraction layer includes instructions that, when executed by the processor, support techniques to improve the performance of the apparatus in a virtualization architecture.
摘要:
The present invention provides a multiprocessor system and method in which plural memory locations are used for storing TLB-shootdown data respectively for plural processors. In contrast to systems in which a single area of memory serves for all processors' TLB-shootdown data, different processors can describe the memory they want to free concurrently. Thus, concurrent TLB-shootdown request are less likely to result in performance-limiting TLB-shootdown contentions that have previously constrained the scaleability of multiprocessor systems.
摘要:
A multiprocessor computer system comprises multiple data processors, each with an internal clock for providing time stamps to application software. The processors take turns as synchronization masters. The present master transmits a “request” time stamp (indicating the time of transmission according to the local clock) to the other (“slave”) processors. Each slave processor responds by returning a “response” time stamp (indicating the time of transmission of the response according to the local slave clock) of its own along with the received request time stamp. The master calculates clock adjustment values from the time of receipt of the responses and the included time stamps. This allows asynchronous clocks to be synchronized so that application time stamps can be validly compared across processors.
摘要:
A technique to improve the performance of virtualized input/output (I/O) resources of a microprocessor within a virtual machine environment. More specifically, embodiments of the invention enable accesses of virtualized I/O resources to be made by guest software without necessarily invoking host software. Furthermore, embodiments of the invention enable more efficient delivery of interrupts to guest software by alleviating the need for host software to be invoked in the delivery process.
摘要:
A technique to improve the performance of virtualized input/output (I/O) resources of a microprocessor within a virtual machine environment. More specifically, embodiments of the invention enable accesses of virtualized I/O resources to be made by guest software without necessarily invoking host software. Furthermore, embodiments of the invention enable more efficient delivery of interrupts to guest software by alleviating the need for host software to be invoked in the delivery process.
摘要:
Embodiments of apparatuses and methods for improving performance in a virtualization architecture are disclosed. In one embodiment, an apparatus includes a processor and a processor abstraction layer. The processor abstraction layer includes instructions that, when executed by the processor, support techniques to improve the performance of the apparatus in a virtualization architecture.