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<p class="MsoNormal"><span lang="EN-US">Hello, team!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am working on intel GFX virtualization solution using host-mediated pass-through. I am currently trying to test virtualized card inside virtual platform (Simics simulator) by running Ubuntu with i915 driver inside.
Underlying GFX is Haswell Gen7.5. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Simulator has artificial BIOS that sets some registers in GFX (BGSM BDSM GGC and some others) to provide address map and DRAM memory information to GFX driver. But, when i915 is executing inside virtualized environment,
it runs normally until GTT initial setup- and during GTT setup, driver fills GTT with 0xfffff physical page frame numbers (so effectively invalid).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The same Ubuntu image works normally outside of virtualized environment (on real host), so I assume, problem is in some simulator issues.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Question is – what are prerequisites for i915 driver to properly setup GTT? Note, that address map information is set correctly in BGSM BDSM and GGC (simulator specifically takes care of it).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What other essential init steps do I miss?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for help<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;position:relative;top:3.0pt;mso-text-raise:-3.0pt;letter-spacing:1.0pt;mso-fareast-language:RU">Ilya Kuprik<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F4E79;mso-fareast-language:RU">SSG Simics SoC modeling team, Moscow<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D;position:relative;top:3.0pt;mso-text-raise:-3.0pt;letter-spacing:1.0pt;mso-fareast-language:RU"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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