GSOC2011 project RTEMS HyperVisor

Gedare Bloom gedare at
Sun Mar 20 16:48:08 UTC 2011

Maybe I misunderstood your intent. Do you plan to port RTEMS to run on
top of a real-time hypervisor, or to make RTEMS become a real-time


2011/3/20 Gedare Bloom <gedare at>:
> I am concerned with this project. The lack of support for MMU in RTEMS
> means that memory protection is not available within the kernel, so it
> will be hard to implement a proper hypervisor.
> -Gedare
> 2011/3/20 张文杰 <157724595 at>:
>> Sorry for forgetting add the reference link.
>> [1].
>> [2].
>> [3].
>> [4].
>> At 2011-03-20 21:50:39,"张文杰" <157724595 at> wrote:
>> Hi, all:
>> I am a student who is preparing for participating the GSOC2011 RTEMS. My
>> interested project is RTEMS HyperVisor [1]. This
>> project 's ultimate goal is to make RTEMS support to run multiple operating
>> systems(like Linux or uclinux) and meantime RTEMS can be
>> adapted to fullfill the requirements defined in the ARINC 653 standard. So
>> the project is divided into two milestone tasks: 1) add a HyperVisor to
>> RTEMS. the design of HyperVisor is compatible with ARINC 653 standard. 2).
>> implement ARINC 653 interface in
>> RTEMS which can reference the a ESA project named AIR[2].
>> Hypervisor, also called virtual machine monitor (VMM), is one of
>> virtualization techniques which allow multiple operating systems.
>> For embedded systems it must have real-time capability. And there is also a
>> challenge to the resource-constrained embedded
>> systems, because support for virtualization requires memory protection (in
>> the form of a memory management unit or at least a
>> memory protection unit) and a distinction between user mode and privileged
>> mode, which rules out many microcontrollers. About the implement of
>> HyperVisor for RTEMS there are two projects we can reference. First is
>> project XtratuM [3] which is a small
>> native (bare-metal) hypervisor, now the RTEMS has been ported to XtratuM run
>> as a guest OS and its design use ARINC 653 as
>> a reference although ARINC-653 is not directly applicable to the hypervisor
>> systems. Another project is HelenOS operating
>> system [4] which is designed as a relatively small microkernel assisted with
>> a set of userspace drivers and server tasks, Its kernel
>> is a good reference candidate for the design of Hypervisor.
>> This is just my initial thoughts, if there is any inappropriate please point
>> out. Do not hesitate to add your comments.
>> Wenjie Zhang
>> Best Regards
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