forked from NRZCode/ia32-64
70 lines
3.5 KiB
HTML
70 lines
3.5 KiB
HTML
<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg" xmlns:x86="http://www.felixcloutier.com/x86"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><link rel="stylesheet" type="text/css" href="style.css"></link><title>VMFUNC
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— Invoke VM function</title></head><body><header><nav><ul><li><a href='index.html'>Index</a></li><li>December 2023</li></ul></nav></header><h1>VMFUNC
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— Invoke VM function</h1>
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<table>
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<tr>
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<th>Opcode/Instruction</th>
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<th>Op/En</th>
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<th>Description</th></tr>
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<tr>
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<td>NP 0F 01 D4 VMFUNC</td>
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<td>ZO</td>
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<td>Invoke VM function specified in EAX.</td></tr></table>
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<h2 id="instruction-operand-encoding">Instruction Operand Encoding<a class="anchor" href="#instruction-operand-encoding">
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¶
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</a></h2>
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<table>
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<tr>
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<td>Op/En</td>
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<td>Operand 1</td>
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<td>Operand 2</td>
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<td>Operand 3</td>
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<td>Operand 4</td></tr>
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<tr>
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<td>ZO</td>
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<td>NA</td>
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<td>NA</td>
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<td>NA</td>
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<td>NA</td></tr></table>
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<h2 id="description">Description<a class="anchor" href="#description">
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¶
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</a></h2>
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<p>This instruction allows software in VMX non-root operation to invoke a VM function, which is processor functionality enabled and configured by software in VMX root operation. The value of EAX selects the specific VM function being invoked.</p>
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<p>The behavior of each VM function (including any additional fault checking) is specified in Section 26.5.6, “VM Functions.”</p>
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<h2 id="operation">Operation<a class="anchor" href="#operation">
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¶
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</a></h2>
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<pre>Perform functionality of the VM function specified in EAX;
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</pre>
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<h2 id="flags-affected">Flags Affected<a class="anchor" href="#flags-affected">
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¶
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</a></h2>
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<p>Depends on the VM function specified in EAX. See Section 26.5.6, “VM Functions.”</p>
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<h2 id="protected-mode-exceptions--not-including-those-defined-by-specific-vm-functions-">Protected Mode Exceptions (not including those defined by specific VM functions)<a class="anchor" href="#protected-mode-exceptions--not-including-those-defined-by-specific-vm-functions-">
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¶
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</a></h2>
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<p>#UD If executed outside VMX non-root operation.</p>
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<p>If “enable VM functions” VM-execution control is 0.</p>
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<p>If EAX ≥ 64.</p>
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<h2 class="exceptions" id="real-address-mode-exceptions">Real-Address Mode Exceptions<a class="anchor" href="#real-address-mode-exceptions">
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¶
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</a></h2>
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<p>Same exceptions as in protected mode.</p>
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<h2 class="exceptions" id="virtual-8086-exceptions">Virtual-8086 Exceptions<a class="anchor" href="#virtual-8086-exceptions">
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¶
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</a></h2>
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<p>Same exceptions as in protected mode.</p>
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<h2 class="exceptions" id="compatibility-mode-exceptions">Compatibility Mode Exceptions<a class="anchor" href="#compatibility-mode-exceptions">
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¶
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</a></h2>
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<p>Same exceptions as in protected mode.</p>
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<h2 class="exceptions" id="64-bit-mode-exceptions">64-Bit Mode Exceptions<a class="anchor" href="#64-bit-mode-exceptions">
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¶
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</a></h2>
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<p>Same exceptions as in protected mode.</p><footer><p>
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This UNOFFICIAL, mechanically-separated, non-verified reference is provided for convenience, but it may be
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inc<span style="opacity: 0.2">omp</span>lete or b<sub>r</sub>oke<sub>n</sub> in various obvious or non-obvious
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ways. Refer to <a href="https://software.intel.com/en-us/download/intel-64-and-ia-32-architectures-sdm-combined-volumes-1-2a-2b-2c-2d-3a-3b-3c-3d-and-4">Intel® 64 and IA-32 Architectures Software Developer’s Manual</a> for anything serious.
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</p></footer></body></html>
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