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<ol class="chapter"><li class="chapter-item expanded "><a href="../introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li class="chapter-item expanded "><a href="../tutorial/introduction.html"><strong aria-hidden="true">2.</strong> Tutorial</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../tutorial/app.html"><strong aria-hidden="true">2.1.</strong> Creating a UEFI Application</a></li><li class="chapter-item expanded "><a href="../tutorial/building.html"><strong aria-hidden="true">2.2.</strong> Building</a></li><li class="chapter-item expanded "><a href="../tutorial/vm.html" class="active"><strong aria-hidden="true">2.3.</strong> Running in a VM</a></li><li class="chapter-item expanded "><a href="../tutorial/hardware.html"><strong aria-hidden="true">2.4.</strong> Running on Hardware</a></li></ol></li><li class="chapter-item expanded "><a href="../how_to/introduction.html"><strong aria-hidden="true">3.</strong> How-to</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../how_to/protocols.html"><strong aria-hidden="true">3.1.</strong> Using Protocols</a></li><li class="chapter-item expanded "><a href="../how_to/drawing.html"><strong aria-hidden="true">3.2.</strong> Drawing to the Screen</a></li><li class="chapter-item expanded "><a href="../how_to/building_drivers.html"><strong aria-hidden="true">3.3.</strong> Building drivers</a></li><li class="chapter-item expanded "><a href="../how_to/rust-std.html"><strong aria-hidden="true">3.4.</strong> Combining Rust std with uefi</a></li></ol></li><li class="chapter-item expanded "><a href="../concepts/introduction.html"><strong aria-hidden="true">4.</strong> Concepts</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../concepts/boot_stages.html"><strong aria-hidden="true">4.1.</strong> Boot Stages</a></li><li class="chapter-item expanded "><a href="../concepts/tables.html"><strong aria-hidden="true">4.2.</strong> Tables</a></li><li class="chapter-item expanded "><a href="../concepts/guid.html"><strong aria-hidden="true">4.3.</strong> GUID</a></li><li class="chapter-item expanded "><a href="../concepts/handles_and_protocols.html"><strong aria-hidden="true">4.4.</strong> Handles and Protocols</a></li><li class="chapter-item expanded "><a href="../concepts/device_paths.html"><strong aria-hidden="true">4.5.</strong> Device Paths</a></li><li class="chapter-item expanded "><a href="../concepts/variables.html"><strong aria-hidden="true">4.6.</strong> Variables</a></li><li class="chapter-item expanded "><a href="../concepts/gpt.html"><strong aria-hidden="true">4.7.</strong> GPT</a></li></ol></li><li class="chapter-item expanded "><a href="../reference.html"><strong aria-hidden="true">5.</strong> Reference</a></li></ol>
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<main>
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<h1 id="running-in-a-vm"><a class="header" href="#running-in-a-vm">Running in a VM</a></h1>
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<h2 id="install-dependencies"><a class="header" href="#install-dependencies">Install dependencies</a></h2>
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<p>Two dependencies are needed: <a href="https://www.qemu.org">QEMU</a>, which implements the virtual
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machine itself, and <a href="https://github.com/tianocore/tianocore.github.io/wiki/OVMF">OVMF</a>, which provides UEFI firmware that QEMU can
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run.</p>
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<p>The details of how to install QEMU and OVMF will vary depending on your
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operating system.</p>
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<p>Debian/Ubuntu:</p>
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<pre><code class="language-sh">sudo apt-get install qemu ovmf
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</code></pre>
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<p>Fedora:</p>
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<pre><code class="language-sh">sudo dnf install qemu-kvm edk2-ovmf
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</code></pre>
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<h3 id="firmware-files"><a class="header" href="#firmware-files">Firmware files</a></h3>
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<p>The OVMF package provides two firmware files, one for the executable
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code and one for variable storage. (The package may provide multiple
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variations of these files; refer to the package's documentation for
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details of the files it includes.)</p>
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<p>For ease of access we'll copy the OVMF code and vars files to the
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project directory. The location where OVMF is installed depends on your
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operating system; for Debian, Ubuntu and Fedora the files are under
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<code>/usr/share/OVMF</code>.</p>
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<p>Copy the files to your project directory:</p>
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<pre><code class="language-sh">cp /usr/share/OVMF/OVMF_CODE.fd .
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cp /usr/share/OVMF/OVMF_VARS.fd .
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</code></pre>
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<h2 id="system-partition"><a class="header" href="#system-partition">System partition</a></h2>
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<p>Now create a directory structure containing the executable to imitate a
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<a href="../concepts/gpt.html#system-partition">UEFI System Partition</a>:</p>
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<pre><code class="language-sh">mkdir -p esp/efi/boot
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cp target/x86_64-unknown-uefi/debug/my-uefi-app.efi esp/efi/boot/bootx64.efi
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</code></pre>
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<h2 id="launch-the-vm"><a class="header" href="#launch-the-vm">Launch the VM</a></h2>
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<p>Now we can launch QEMU, using <a href="https://en.m.wikibooks.org/wiki/QEMU/Devices/Storage#Virtual_FAT_filesystem_(VVFAT)">VVFAT</a> to access the <code>esp</code> directory created above.</p>
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<pre><code class="language-sh">qemu-system-x86_64 -enable-kvm \
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-drive if=pflash,format=raw,readonly=on,file=OVMF_CODE.fd \
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-drive if=pflash,format=raw,readonly=on,file=OVMF_VARS.fd \
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-drive format=raw,file=fat:rw:esp
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</code></pre>
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<p>A QEMU window should appear, and after a few seconds you should see the
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log message:</p>
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<pre><code class="language-text">[ INFO]: src/main.rs@011: Hello world!
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</code></pre>
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