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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">it’s decided by KVMGT. the real recipe is EPT, which is a CPU hw virtualization feature to decide which access in VM is trapped or not.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><a name="_____replyseparator"></a><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> intel-gvt-dev [mailto:intel-gvt-dev-bounces@lists.freedesktop.org]
<b>On Behalf Of </b>Adel Belkhiri<br>
<b>Sent:</b> Wednesday, October 25, 2017 11:06 PM<br>
<b>To:</b> intel-gvt-dev@lists.freedesktop.org<br>
<b>Subject:</b> How gpu requests are trapped by kvmgt ?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi everybody,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have a question about the implementation of KVMGT. According to the documentation, the virtual machine, may send some requests to the gpu directly (Pass-through) and forward some other requests to the KVMGT
module. <br>
<br>
I read the code of KVMGT but i didn't understand how requests are being sent directly to the gpu ? and who decide which request to be directly sent to the gpu or to be trapped by kvmgt ? Is it the graphics card driver of the VM (i915) or KVMGT ?<o:p></o:p></p>
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<p class="MsoNormal">Thanks a lot for your help.<o:p></o:p></p>
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<p class="MsoNormal">Yours.<o:p></o:p></p>
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