Abstract: A system includes a first subsystem and a second subsystem that are used in a same chip. A security level of a first physical resource included in the first subsystem is higher than a security level of a second physical resource included in the second subsystem. The first subsystem includes an interrupt controller, and the interrupt controller is configured to manage an interrupt of a peripheral of the second subsystem. Embodiments of this application are for isolation between subsystems of different security levels in a chip.

Abstract: A data transmission method and apparatus are provided. The data transmission method is applied to a computer system including at least two coprocessors, for example, including a first coprocessor and a second coprocessor. A shared memory is deployed between the first coprocessor and the second coprocessor, and is configured to store data generated when subtasks are separately executed. Further, the shared memory further stores a storage address of data generated when a subtask is executed, and a mapping relationship between each subtask and a coprocessor that executes the subtask. Therefore, a storage address of data to be read by the coprocessor may be found based on the mapping relationship, and the data may further be directly read from the shared memory without being copied by using a system bus. This improves efficiency of data transmission between the coprocessors.

Abstract: Method and systems for executing a non-maskable interrupt are provided. In one aspect, a method for executing a non-maskable interrupt includes: obtaining an interrupt request in a non-secure mode, and interrupting an operation of an operating system (OS); saving, in a secure mode, a status of the OS when the operation of the OS is interrupted; executing, in the non-secure mode, a procedure defined for the interrupt request; resume, in the secure mode, the status of the OS; and after resuming the status of the OS, continue executing the operation of the OS in the non-secure mode.

Abstract: Method and systems for executing a non-maskable interrupt are provided. In one aspect, a method for executing a non-maskable interrupt includes: obtaining an interrupt request in a non-secure mode, and interrupting an operation of an operating system (OS); saving, in a secure mode, a status of the OS when the operation of the OS is interrupted; executing, in the non-secure mode, a procedure defined for the interrupt request; resume, in the secure mode, the status of the OS; and after resuming the status of the OS, continue executing the operation of the OS in the non-secure mode.

Abstract: The present invention discloses a method and an apparatus for executing a non-maskable interrupt. The method includes: obtaining a secure interrupt request in a non-secure mode, and interrupting an operation of an operating system OS, where the secure interrupt request cannot be masked; entering a secure mode by using the secure interrupt request, and saving, in the secure mode, an interrupt context of an OS status when the operation of the OS is interrupted; returning to the non-secure mode to execute user-defined processing; after the user-defined processing is completed, entering the secure mode again, and resuming the OS status in the secure mode according to the interrupt context; and returning to the non-secure mode again, and continuing to execute an operation of the OS. The method and the apparatus for executing a non-maskable interrupt in embodiments of the present invention can easily implement an NMI mechanism without depending on hardware.

Abstract: The present invention discloses a method and an apparatus for executing a non-maskable interrupt. The method includes: obtaining a secure interrupt request in a non-secure mode, and interrupting an operation of an operating system OS, where the secure interrupt request cannot be masked; entering a secure mode by using the secure interrupt request, and saving, in the secure mode, an interrupt context of an OS status when the operation of the OS is interrupted; returning to the non-secure mode to execute user-defined processing; after the user-defined processing is completed, entering the secure mode again, and resuming the OS status in the secure mode according to the interrupt context; and returning to the non-secure mode again, and continuing to execute an operation of the OS. The method and the apparatus for executing a non-maskable interrupt in embodiments of the present invention can easily implement an NMI mechanism without depending on hardware.

Abstract: A method and an apparatus execute a non-maskable interrupt. The method includes: obtaining a secure interrupt request in a non-secure mode, and interrupting an operation of an operating system OS, where the secure interrupt request cannot be masked; entering a secure mode by using the secure interrupt request, and saving, in the secure mode, an interrupt context of an OS status when the operation of the OS is interrupted; returning to the non-secure mode to execute user-defined processing; after the user-defined processing is completed, entering the secure mode again, and resuming the OS status in the secure mode according to the interrupt context; and returning to the non-secure mode again, and continuing to execute an operation of the OS. The method and the apparatus for executing a non-maskable interrupt in embodiments of the present invention can easily implement an NMI mechanism without depending on hardware.

Abstract: A method and an apparatus execute a non-maskable interrupt. The method includes: obtaining a secure interrupt request in a non-secure mode, and interrupting an operation of an operating system OS, where the secure interrupt request cannot be masked; entering a secure mode by using the secure interrupt request, and saving, in the secure mode, an interrupt context of an OS status when the operation of the OS is interrupted; returning to the non-secure mode to execute user-defined processing; after the user-defined processing is completed, entering the secure mode again, and resuming the OS status in the secure mode according to the interrupt context; and returning to the non-secure mode again, and continuing to execute an operation of the OS. The method and the apparatus for executing a non-maskable interrupt in embodiments of the present invention can easily implement an NMI mechanism without depending on hardware.

Abstract: A resource configuration method of a virtual machine and a communications device. When an actual requirement of the virtual machine for the network resource is dynamically changed, the communications device may dynamically configure a communication manner corresponding to the virtual machine such that a virtual machine with a relatively low requirement for the network resource may use the manner of sharing the physical network interface card, and a virtual machine with a relatively high requirement for the network resource may use the pass-through manner, which does not cause a situation in which network resources of some virtual machines are wasted and network resources of some virtual machines are insufficient. As a result, network resources of virtual machines are properly allocated.

Abstract: A resource configuration method of a virtual machine and a communications device. When an actual requirement of the virtual machine for the network resource is dynamically changed, the communications device may dynamically configure a communication manner corresponding to the virtual machine such that a virtual machine with a relatively low requirement for the network resource may use the manner of sharing the physical network interface card, and a virtual machine with a relatively high requirement for the network resource may use the pass-through manner, which does not cause a situation in which network resources of some virtual machines are wasted and network resources of some virtual machines are insufficient. As a result, network resources of virtual machines are properly allocated.