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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Bug] guest i915 may guess the wrong PCH in virtual env"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110234">110234</a>
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<th>Summary</th>
<td>[Bug] guest i915 may guess the wrong PCH in virtual env
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<th>Product</th>
<td>DRI
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<th>Version</th>
<td>DRI git
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>trivial
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>xiong.y.zhang@intel.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<pre>Currently guest i915 guess pch type according to processor type in virtual env.
As the real pch isn't in guest, but guest i915 need pch for some function, then
guest i915 has to guess the pch type. Normally this guess is right, but this
guess may be wrong in the following case:
1) ULT/ULX processor with non LP PCH
2) normal processor with LP pch
In order to fix it, the real pch id should be passed to guest, but there isn't
a standard way to do this. Hacker method is needed in QEMU and i915, and kinds
of hacker are rejected by QEMU.</pre>
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