Abstract: Methods, systems, apparatuses and program products are disclosed for managing device virtualization in hypervisor and hypervisor-related environment which include both pass-thru I/O and emulated I/O. This may include setting up a page table entry so an instruction may execute untrapped in an unprivileged domain such as by creating a new entry in a page table with requisite read or write permissions set. Later the page table may be edited (or an entry deleted) so the same I/O instruction is trapped and responsively emulated. In another embodiment of the invention, an electronic device may be provided with at least one controller; and one non-volatile memory having instructions encoded therein which, when executed, implement the context-based virtualization An advantage provided by the present invention is that performance of the device may be traded off against resource consumed dynamically responsive to system operating conditions.

Abstract: Methods, systems, apparatuses and program products are disclosed for managing interrupt services in hypervisor and hypervisor-related environments in Message Signaled Interrupts are emulated as other type(s) of interrupt. According to an aspect of the present invention, a method of executing a program includes receiving a MSI (message signaled interrupt). Responsively, a virtual interrupt is generated and an ISR (interrupt service routine) is invoked that handles a line-based virtual interrupt transaction. A surrogate or virtual peripheral device status may also be provided and may be associated with the virtual interrupt. A single device interrupt event may, in certain circumstances, be serviced both as a line-based interrupt and also as an MSI, or as either responsive to run-time context. Embodiments of the present invention enable superior tradeoffs in regards to the interrupt sharing to a greater and more flexible extent than with previous implementations.

Abstract: Methods, systems, apparatuses and program products are disclosed for managing DMA compliance by remapping in hypervisor and hypervisor-related environments.

Abstract: Methods, systems, apparatuses and program products are disclosed for managing interrupt services in hypervisor and hypervisor-related environments in Message Signaled Interrupts are emulated as other type(s) of interrupt. According to an aspect of the present invention, a method of executing a program includes receiving a MSI (message signaled interrupt). Responsively, a virtual interrupt is generated and an ISR (interrupt service routine) is invoked that handles a line-based virtual interrupt transaction. A surrogate or virtual peripheral device status may also be provided and may be associated with the virtual interrupt. A single device interrupt event may, in certain circumstances, be serviced both as a line-based interrupt and also as an MSI, or as either responsive to run-time context. Embodiments of the present invention enable superior tradeoffs in regards to the interrupt sharing to a greater and more flexible extent than with previous implementations.

Abstract: Methods, systems, apparatuses and program products are disclosed for managing device virtualization in hypervisor and hypervisor-related environment which include both pass-thru I/O and emulated I/O. This may include setting up a page table entry so an instruction may execute untrapped in an unprivileged domain such as by creating a new entry in a page table with requisite read or write permissions set. Later the page table may be edited (or an entry deleted) so the same I/O instruction is trapped and responsively emulated. In another embodiment of the invention, an electronic device may be provided with at least one controller; and one non-volatile memory having instructions encoded therein which, when executed, implement the context-based virtualization An advantage provided by the present invention is that performance of the device may be traded off against resource consumed dynamically responsive to system operating conditions.

Abstract: Methods, systems, apparatuses and program products are disclosed for managing device virtualization in hypervisor and hypervisor-related environment which include both pass-thru I/O and emulated I/O.