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Hi Karoline,<br>
<br>
It would be easier to help you if you could explain more accurately
what you want to do.<br>
<br>
If the question is whether a host OS process can open a shared
memory window into a guest OS process (or the other way around),
then no, we don't provide APIs for that *yet*. We have been giving
this some thought already, but haven't had the need for it yet, thus
not implemented.<br>
<br>
However, if the question is whether you can write a virtual device
(like all the src/VBox/Devices/*/Dev*.cpp files does) that talks
with a guest OS driver using shared memory, then certainly we've
been doing that since forever, just look at the VGA frame buffer
(src/VBox/Devices/Graphics/DevVGA.cpp) and the VMM devices
(src/VBox/Devices/VMMDev/VMMDev.cpp). The VGA frame buffer is
specially host memory (called MMIO2) that the guest accesses, while
the VMMDev is handed contiguous guest memory like any other DMA
capable device. The HGSMI interface that Ramshankar mentions is a
variation on what the VGA device does.<br>
<br>
Kind Regards,<br>
bird.<br>
<br>
<div class="moz-cite-prefix">On 2/11/2014 2:45 PM, ramshankar
venkataraman wrote:<br>
</div>
<blockquote cite="mid:52FA296D.8010403@oracle.com" type="cite">
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I'm not certain what exactly you require, but perhaps what you
want is something along the lines of HGCM and HGSMI (Host-Guest
Shared Memory Interface)? If so, take a look at
src/VBox/GuestHost/HGSMI/<br>
<br>
Regards,<br>
Ram.<br>
<br>
<div class="moz-cite-prefix">On 30/01/2014 17:59, Karoline Haus
wrote:<br>
</div>
<blockquote
cite="mid:1391101168.92864.YahooMailNeo@web171406.mail.ir2.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial,
Lucida Grande, sans-serif;font-size:12pt">Hi I was wondering
if there was a shared memory driver that I can use to talk
between guest and host OS? Basically I'm looking for something
like a para-virtualized driver that other virtualization
solutions use. I haven't found anything like that in the VBox
documentation. Does such a driver exists? Basically I want to
be able to communicate between guest and host but not use any
standard mechanisms like networking. Thanks for any pointers!<br>
<br>
Karoline<br>
<div><br>
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