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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="gimdebughyperv">
<title>Hyper-V Debug Options</title>
<body>
<p>All of the options listed below are optional, and thus the default value specified will be used when the
corresponding key-value pair is not specified. </p>
<ul>
<li>
<p>Key: <b outputclass="bold"><codeph>enabled</codeph></b>
</p>
<p>Value: <codeph>0</codeph> or <codeph>1</codeph>
</p>
<p>Default: <codeph>0</codeph>
</p>
<p>Specify <codeph>1</codeph> to enable the Hyper-V debug interface. If this key-value pair is not specified or
the value is not <codeph>1</codeph>, the Hyper-V debug interface is disabled regardless of other
key-value pairs being present. </p>
</li>
<li>
<p>Key: <b outputclass="bold"><codeph>address</codeph></b>
</p>
<p>Value: IPv4 address </p>
<p>Default: 127.0.0.1 </p>
<p>Specify the IPv4 address where the remote debugger is connected. </p>
</li>
<li>
<p>Key: <b outputclass="bold"><codeph>port</codeph></b>
</p>
<p>Value: UDP port number </p>
<p>Default: 50000 </p>
<p>Specify the UDP port number where the remote debugger is connected. </p>
</li>
<li>
<p>Key: <b outputclass="bold"><codeph>vendor</codeph></b>
</p>
<p>Value: Hyper-V vendor signature reported by CPUID to the guest </p>
<p>Default: When debugging is enabled: <codeph>Microsoft Hv</codeph>, otherwise: <codeph>VBoxVBoxVBox</codeph>
</p>
<p>Specify the Hyper-V vendor signature which is exposed to the guest by CPUID. For debugging Microsoft Windows
guests, it is required the hypervisor reports the Microsoft vendor. </p>
</li>
<li>
<p>Key: <b outputclass="bold"><codeph>hypercallinterface</codeph></b>
</p>
<p>Value: <codeph>0</codeph> or <codeph>1</codeph>
</p>
<p>Default: <codeph>0</codeph>
</p>
<p>Specify whether hypercalls should be suggested for initiating debug data transfers between host and guest
rather than MSRs when requested by the guest. </p>
</li>
<li>
<p>Key: <b outputclass="bold"><codeph>vsinterface</codeph></b>
</p>
<p>Value: <codeph>0</codeph> or <codeph>1</codeph>
</p>
<p>Default: When debugging is enabled, <codeph>1</codeph>, otherwise <codeph>0</codeph>
</p>
<p>Specify whether to expose the VS#1 virtualization service interface to the guest. This interface is required
for debugging Microsoft Windows 10 32-bit guests, but is optional for other Windows versions. </p>
</li>
</ul>
</body>
</topic>
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