OPEN KERNEL LABS Patent applications |
Patent application number | Title | Published |
20130074070 | METHODS AND APPARATUS FOR FAST CONTEXT SWITCHING IN A VIRTUALIZED SYSTEM - The present disclosure provides methods and apparatus for fast context switching in a. virtualized system. In the disclosed system, a globally unique application-space identifier is associated with each guest application. No two applications share the same application-space identifier, even if the two applications reside in different virtual machines. Domain identifiers are used to ensure that a guest's mappings are only active when that guest is executing. A unique domain identifier is associated with each virtual machine, and all translation lookaside buffer entries thereby mapping the guests kernel pages with that domain value. All other mappings are tagged with a predefined domain such as zero. In addition, a virtual memory management unit may be configured to support two virtual page table pointers and a configurable boundary between a virtual user page table and a virtual kernel page table. In such an instance, the two virtual page table pointers are presented to a guest operating system, and two physical page table pointers are associated with the two virtual page table pointers. | 03-21-2013 |
20110093869 | METHODS AND APPARATUS FOR CONSTRUCTING A SECURE AND FLEXIBLE OPERATING SYSTEM - The present disclosure provides methods and apparatus for constructing a secure and flexible operating system. The presently disclosed system executes different user applications in different operating systems on different virtual machines. Each user application communicates with other processes via the hypertext transfer protocol (HTTP). In particular, each user application's user interface is implemented in a web browser that is running in its own operating system on its own virtual machine, and each user application interacts with the user interface by exchanging HTTP messages between the virtual machines. | 04-21-2011 |
20110078678 | METHODS AND APPARATUS FOR PRODUCING CROSS-PLATFORM SOFTWARE APPLICATIONS - The present disclosure provides a system that produces cross-platform software applications by installing different container applications on different hardware platforms. Each container application is native to that hardware platform and includes a web browser and a web server. Standard web applications run locally on the hardware platform due to the local web server, and the standard web applications appear native to each different hardware platform because a converter in the container application converts standard web browser controls to native appearing controls. | 03-31-2011 |
20100313201 | METHODS AND APPARATUS FOR FAST CONTEXT SWITCHING IN A VIRTUALIZED SYSTEM - The present disclosure provides methods and apparatus for fast context switching in a virtualized system. In the disclosed system, a globally unique application-space identifier is associated with each guest application. No two applications share the same application-space identifier, even if the two applications reside in different virtual machines. Domain identifiers are used to ensure that a guest's mappings are only active when that guest is executing. A unique domain identifier is associated with each virtual machine, and all translation lookaside buffer entries thereby mapping the guest's kernel pages with that domain value. All other mappings are tagged with a predefined domain such as zero. In addition, a virtual memory management unit may be configured to support two virtual page table pointers and a configurable boundary between a virtual user page table and a virtual kernel page table. In such an instance, the two virtual page table pointers are presented to a guest operating system, and two physical page table pointers are associated with the two virtual page table pointers. | 12-09-2010 |