BACKGROUND The present disclosure relates to the handling of interrupts in a environment that utilizes virtual machines, and, more specifically, to the steering of interrupts between multiple logical processors running virtual machines. The virtualiz…

BACKGROUND Generally, the concept of virtualization in information processing systems allows multiple instances of one or more operating systems (each, an "OS") to run on a single information processing system, even though each OS is designed to…

BACKGROUND OF THE INVENTION A conventional virtual-machine monitor (VMM) typically runs on a computer and presents to other software the abstraction of one or more virtual machines. Each virtual machine may function as a self-contained platform, runn…

BACKGROUND OF THE INVENTION The present invention relates to virtual machine implementations, and in particular to a safe general purpose virtual machine that generates optimized virtual machine computer programs that are executable in a general purp…

BACKGROUND Virtualization technology enables a single host computer running a virtual machine monitor ("VMM") to present multiple abstractions and/or views of the host, such that the underlying hardware of the host appears as one or more indepen…

A method for allowing a protected mode kernel to service, in virtual 8086 mode, hardware interrupts which occur during execution of ring 0 protected mode code. When an interrupt occurs during execution of ring 0 code, the microprocessor copies the st…

目录 . 引言 . Linux 中断的概念 . 中断处理流程 . Linux 中断相关的源代码分析 . Linux 硬件中断 . Linux 软中断 . 中断优先级 . CPU在关中断状态下编程要注意的事项 0. 引言 中断是现代计算机体系结构的重要组成部分,我们回顾历史,现代体系结构的基本输入输出方式有三种 . 程序查询: CPU周期性询问外部设备是否准备就绪.该方式的明显的缺点就是浪费CPU资源,效率低下.但是在特定的场景下这种"程序查询"的方式还有有它的用武之地的 例如,在网络驱…

A computer system is described having one or more host processors, a host chipset and an input/output (I/O) subsystem. The host processors are connected to the host chipset by a host bus. The host chipset is connected to the input/output subsystem by…

A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed…

Linux mips64r2 PCI中断路由机制分析 本文主要分析mips64r2 PCI设备中断路由原理和irq号分配实现方法,并尝试回答如下问题: PCI设备驱动中断注册(request_irq)时的irq#从哪里来?是硬件相关?还是软件相关? 中断上报时,CPU是如何获得这个irq#的? 本文主要分析PIC(可编程中断控制器)的工作原理,PIC一般集成在CPU中,不同arch.vendor CPU的PIC实现原理也不尽相同.本文基于kerne3.10 + mips64r2 XXX CPU分…