* Could a dirver allow Windows to make Linux system calls?
@ 2007-03-07 13:27 M.Thomas Frederiksen
[not found] ` <loom.20070307T141643-495-eS7Uydv5nfjZ+VzJOa5vwg@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: M.Thomas Frederiksen @ 2007-03-07 13:27 UTC (permalink / raw)
To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
Given that the guest is a process on Linux, couldn't it use Linux system calls
like any other Linux process? For example, could a driver be added to Windows,
so that Windows could use the same system call that X windows does to get access
to the video card?
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* Re: Could a dirver allow Windows to make Linux system calls?
[not found] ` <loom.20070307T141643-495-eS7Uydv5nfjZ+VzJOa5vwg@public.gmane.org>
@ 2007-03-07 14:41 ` Avi Kivity
0 siblings, 0 replies; 2+ messages in thread
From: Avi Kivity @ 2007-03-07 14:41 UTC (permalink / raw)
To: M.Thomas Frederiksen; +Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
M.Thomas Frederiksen wrote:
> Given that the guest is a process on Linux, couldn't it use Linux system calls
> like any other Linux process?
No, system calls on the guest go to the guest kernel.
> For example, could a driver be added to Windows,
> so that Windows could use the same system call that X windows does to get access
> to the video card?
>
kvm exposes a hypercall mechanism which allows a guest driver to call
the host. You could use that to tunnel opengl commands to the display.
See http://www.cs.toronto.edu/~andreslc/xen-gl/ for an example.
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2007-03-07 13:27 Could a dirver allow Windows to make Linux system calls? M.Thomas Frederiksen
[not found] ` <loom.20070307T141643-495-eS7Uydv5nfjZ+VzJOa5vwg@public.gmane.org>
2007-03-07 14:41 ` Avi Kivity
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