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322 lines
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<li class="toctree-l2 current"><a class="reference internal" href="targets.html">QEMU System Emulator Targets</a><ul class="current">
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<li class="toctree-l3 current"><a class="current reference internal" href="#">Arm System emulator</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="#choosing-a-board-model">Choosing a board model</a></li>
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<li class="toctree-l4"><a class="reference internal" href="#board-specific-documentation">Board-specific documentation</a></li>
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<li class="toctree-l4"><a class="reference internal" href="#emulated-cpu-architecture-support">Emulated CPU architecture support</a></li>
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<li class="toctree-l4"><a class="reference internal" href="#arm-cpu-features">Arm CPU features</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-avr.html">AVR System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-m68k.html">ColdFire System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-mips.html">MIPS System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-rx.html">RX System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-s390x.html">s390x System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-sparc.html">Sparc32 System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-sparc64.html">Sparc64 System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-i386.html">x86 System emulator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="target-xtensa.html">Xtensa System emulator</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../user/index.html">User Mode Emulation</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../interop/index.html">System Emulation Management and Interoperability</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../specs/index.html">System Emulation Guest Hardware Specifications</a></li>
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<section id="arm-system-emulator">
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<span id="id1"></span><h1>Arm System emulator<a class="headerlink" href="#arm-system-emulator" title="Link to this heading"></a></h1>
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<p>QEMU can emulate both 32-bit and 64-bit Arm CPUs. Use the
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<code class="docutils literal notranslate"><span class="pre">qemu-system-aarch64</span></code> executable to simulate a 64-bit Arm machine.
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You can use either <code class="docutils literal notranslate"><span class="pre">qemu-system-arm</span></code> or <code class="docutils literal notranslate"><span class="pre">qemu-system-aarch64</span></code>
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to simulate a 32-bit Arm machine: in general, command lines that
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work for <code class="docutils literal notranslate"><span class="pre">qemu-system-arm</span></code> will behave the same when used with
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<code class="docutils literal notranslate"><span class="pre">qemu-system-aarch64</span></code>.</p>
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<p>QEMU has generally good support for Arm guests. It has support for
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nearly fifty different machines. The reason we support so many is that
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Arm hardware is much more widely varying than x86 hardware. Arm CPUs
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are generally built into “system-on-chip” (SoC) designs created by
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many different companies with different devices, and these SoCs are
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then built into machines which can vary still further even if they use
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the same SoC. Even with fifty boards QEMU does not cover more than a
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small fraction of the Arm hardware ecosystem.</p>
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<p>The situation for 64-bit Arm is fairly similar, except that we don’t
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implement so many different machines.</p>
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<p>As well as the more common “A-profile” CPUs (which have MMUs and will
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run Linux) QEMU also supports “M-profile” CPUs such as the Cortex-M0,
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Cortex-M4 and Cortex-M33 (which are microcontrollers used in very
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embedded boards). For most boards the CPU type is fixed (matching what
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the hardware has), so typically you don’t need to specify the CPU type
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by hand, except for special cases like the <code class="docutils literal notranslate"><span class="pre">virt</span></code> board.</p>
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<section id="choosing-a-board-model">
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<h2>Choosing a board model<a class="headerlink" href="#choosing-a-board-model" title="Link to this heading"></a></h2>
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<p>For QEMU’s Arm system emulation, you must specify which board
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model you want to use with the <code class="docutils literal notranslate"><span class="pre">-M</span></code> or <code class="docutils literal notranslate"><span class="pre">--machine</span></code> option;
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there is no default.</p>
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<p>Because Arm systems differ so much and in fundamental ways, typically
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operating system or firmware images intended to run on one machine
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will not run at all on any other. This is often surprising for new
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users who are used to the x86 world where every system looks like a
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standard PC. (Once the kernel has booted, most userspace software
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cares much less about the detail of the hardware.)</p>
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<p>If you already have a system image or a kernel that works on hardware
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and you want to boot with QEMU, check whether QEMU lists that machine
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in its <code class="docutils literal notranslate"><span class="pre">-machine</span> <span class="pre">help</span></code> output. If it is listed, then you can probably
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use that board model. If it is not listed, then unfortunately your image
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will almost certainly not boot on QEMU. (You might be able to
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extract the filesystem and use that with a different kernel which
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boots on a system that QEMU does emulate.)</p>
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<p>If you don’t care about reproducing the idiosyncrasies of a particular
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bit of hardware, such as small amount of RAM, no PCI or other hard
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disk, etc., and just want to run Linux, the best option is to use the
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<code class="docutils literal notranslate"><span class="pre">virt</span></code> board. This is a platform which doesn’t correspond to any
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real hardware and is designed for use in virtual machines. You’ll
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need to compile Linux with a suitable configuration for running on
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the <code class="docutils literal notranslate"><span class="pre">virt</span></code> board. <code class="docutils literal notranslate"><span class="pre">virt</span></code> supports PCI, virtio, recent CPUs and
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large amounts of RAM. It also supports 64-bit CPUs.</p>
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</section>
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<section id="board-specific-documentation">
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<h2>Board-specific documentation<a class="headerlink" href="#board-specific-documentation" title="Link to this heading"></a></h2>
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<p>Unfortunately many of the Arm boards QEMU supports are currently
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undocumented; you can get a complete list by running
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<code class="docutils literal notranslate"><span class="pre">qemu-system-aarch64</span> <span class="pre">--machine</span> <span class="pre">help</span></code>.</p>
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<div class="toctree-wrapper compound">
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="arm/integratorcp.html">Arm Integrator/CP (<code class="docutils literal notranslate"><span class="pre">integratorcp</span></code>)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="arm/mps2.html">Arm MPS2 and MPS3 boards (<code class="docutils literal notranslate"><span class="pre">mps2-an385</span></code>, <code class="docutils literal notranslate"><span class="pre">mps2-an386</span></code>, <code class="docutils literal notranslate"><span class="pre">mps2-an500</span></code>, <code class="docutils literal notranslate"><span class="pre">mps2-an505</span></code>, <code class="docutils literal notranslate"><span class="pre">mps2-an511</span></code>, <code class="docutils literal notranslate"><span class="pre">mps2-an521</span></code>, <code class="docutils literal notranslate"><span class="pre">mps3-an524</span></code>, <code class="docutils literal notranslate"><span class="pre">mps3-an547</span></code>)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="arm/musca.html">Arm Musca boards (<code class="docutils literal notranslate"><span class="pre">musca-a</span></code>, <code class="docutils literal notranslate"><span class="pre">musca-b1</span></code>)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="arm/realview.html">Arm Realview boards (<code class="docutils literal notranslate"><span class="pre">realview-eb</span></code>, <code class="docutils literal notranslate"><span class="pre">realview-eb-mpcore</span></code>, <code class="docutils literal notranslate"><span class="pre">realview-pb-a8</span></code>, <code class="docutils literal notranslate"><span class="pre">realview-pbx-a9</span></code>)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="arm/sbsa.html">Arm Server Base System Architecture Reference board (<code class="docutils literal notranslate"><span class="pre">sbsa-ref</span></code>)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="arm/versatile.html">Arm Versatile boards (<code class="docutils literal notranslate"><span class="pre">versatileab</span></code>, <code class="docutils literal notranslate"><span class="pre">versatilepb</span></code>)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="arm/vexpress.html">Arm Versatile Express boards (<code class="docutils literal notranslate"><span class="pre">vexpress-a9</span></code>, <code class="docutils literal notranslate"><span class="pre">vexpress-a15</span></code>)</a></li>
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||
<li class="toctree-l1"><a class="reference internal" href="arm/aspeed.html">Aspeed family boards (<code class="docutils literal notranslate"><span class="pre">*-bmc</span></code>, <code class="docutils literal notranslate"><span class="pre">ast2500-evb</span></code>, <code class="docutils literal notranslate"><span class="pre">ast2600-evb</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/aspeed.html#aspeed-minibmc-family-boards-ast1030-evb">Aspeed minibmc family boards (<code class="docutils literal notranslate"><span class="pre">ast1030-evb</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/aspeed.html#facebook-yosemite-v3-5-platform-and-craterlake-server-fby35">Facebook Yosemite v3.5 Platform and CraterLake Server (<code class="docutils literal notranslate"><span class="pre">fby35</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/bananapi_m2u.html">Banana Pi BPI-M2U (<code class="docutils literal notranslate"><span class="pre">bpim2u</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/sabrelite.html">Boundary Devices SABRE Lite (<code class="docutils literal notranslate"><span class="pre">sabrelite</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/digic.html">Canon A1100 (<code class="docutils literal notranslate"><span class="pre">canon-a1100</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cubieboard.html">Cubietech Cubieboard (<code class="docutils literal notranslate"><span class="pre">cubieboard</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/emcraft-sf2.html">Emcraft SmartFusion2 SOM kit (<code class="docutils literal notranslate"><span class="pre">emcraft-sf2</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/highbank.html">Calxeda Highbank and Midway (<code class="docutils literal notranslate"><span class="pre">highbank</span></code>, <code class="docutils literal notranslate"><span class="pre">midway</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/musicpal.html">Freecom MusicPal (<code class="docutils literal notranslate"><span class="pre">musicpal</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/gumstix.html">Gumstix Connex and Verdex (<code class="docutils literal notranslate"><span class="pre">connex</span></code>, <code class="docutils literal notranslate"><span class="pre">verdex</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/mainstone.html">Intel Mainstone II board (<code class="docutils literal notranslate"><span class="pre">mainstone</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/kzm.html">Kyoto Microcomputer KZM-ARM11-01 (<code class="docutils literal notranslate"><span class="pre">kzm</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/nrf.html">Nordic nRF boards (<code class="docutils literal notranslate"><span class="pre">microbit</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/nseries.html">Nokia N800 and N810 tablets (<code class="docutils literal notranslate"><span class="pre">n800</span></code>, <code class="docutils literal notranslate"><span class="pre">n810</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/nuvoton.html">Nuvoton iBMC boards (<code class="docutils literal notranslate"><span class="pre">*-bmc</span></code>, <code class="docutils literal notranslate"><span class="pre">npcm750-evb</span></code>, <code class="docutils literal notranslate"><span class="pre">quanta-gsj</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/imx25-pdk.html">NXP i.MX25 PDK board (<code class="docutils literal notranslate"><span class="pre">imx25-pdk</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/orangepi.html">Orange Pi PC (<code class="docutils literal notranslate"><span class="pre">orangepi-pc</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/palm.html">Palm Tungsten|E PDA (<code class="docutils literal notranslate"><span class="pre">cheetah</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/raspi.html">Raspberry Pi boards (<code class="docutils literal notranslate"><span class="pre">raspi0</span></code>, <code class="docutils literal notranslate"><span class="pre">raspi1ap</span></code>, <code class="docutils literal notranslate"><span class="pre">raspi2b</span></code>, <code class="docutils literal notranslate"><span class="pre">raspi3ap</span></code>, <code class="docutils literal notranslate"><span class="pre">raspi3b</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/xscale.html">Sharp XScale-based PDA models (<code class="docutils literal notranslate"><span class="pre">akita</span></code>, <code class="docutils literal notranslate"><span class="pre">borzoi</span></code>, <code class="docutils literal notranslate"><span class="pre">spitz</span></code>, <code class="docutils literal notranslate"><span class="pre">terrier</span></code>, <code class="docutils literal notranslate"><span class="pre">tosa</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/collie.html">Sharp Zaurus SL-5500 (<code class="docutils literal notranslate"><span class="pre">collie</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/sx1.html">Siemens SX1 (<code class="docutils literal notranslate"><span class="pre">sx1</span></code>, <code class="docutils literal notranslate"><span class="pre">sx1-v1</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/stellaris.html">Stellaris boards (<code class="docutils literal notranslate"><span class="pre">lm3s6965evb</span></code>, <code class="docutils literal notranslate"><span class="pre">lm3s811evb</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/stm32.html">STMicroelectronics STM32 boards (<code class="docutils literal notranslate"><span class="pre">netduino2</span></code>, <code class="docutils literal notranslate"><span class="pre">netduinoplus2</span></code>, <code class="docutils literal notranslate"><span class="pre">stm32vldiscovery</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/virt.html">‘virt’ generic virtual platform (<code class="docutils literal notranslate"><span class="pre">virt</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/xlnx-versal-virt.html">Xilinx Versal Virt (<code class="docutils literal notranslate"><span class="pre">xlnx-versal-virt</span></code>)</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/xenpvh.html">Xen Device Emulation Backend (<code class="docutils literal notranslate"><span class="pre">xenpvh</span></code>)</a></li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
<section id="emulated-cpu-architecture-support">
|
||
<h2>Emulated CPU architecture support<a class="headerlink" href="#emulated-cpu-architecture-support" title="Link to this heading"></a></h2>
|
||
<div class="toctree-wrapper compound">
|
||
<ul>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/emulation.html">A-profile CPU architecture support</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/emulation.html#r-profile-cpu-architecture-support">R-profile CPU architecture support</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/emulation.html#m-profile-cpu-architecture-support">M-profile CPU architecture support</a></li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
<section id="arm-cpu-features">
|
||
<h2>Arm CPU features<a class="headerlink" href="#arm-cpu-features" title="Link to this heading"></a></h2>
|
||
<div class="toctree-wrapper compound">
|
||
<ul>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html">Arm CPU Features</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#cpu-feature-probing">CPU Feature Probing</a><ul>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#a-note-about-cpu-feature-dependencies">A note about CPU feature dependencies</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#a-note-about-cpu-models-and-kvm">A note about CPU models and KVM</a></li>
|
||
</ul>
|
||
</li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#using-cpu-features">Using CPU Features</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#kvm-vcpu-features">KVM VCPU Features</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#tcg-vcpu-features">TCG VCPU Features</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#sve-cpu-properties">SVE CPU Properties</a><ul>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sve-cpu-property-dependencies-and-constraints">SVE CPU Property Dependencies and Constraints</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sve-cpu-property-parsing-semantics">SVE CPU Property Parsing Semantics</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sve-cpu-property-examples">SVE CPU Property Examples</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sve-cpu-property-recommendations">SVE CPU Property Recommendations</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sme-cpu-property-examples">SME CPU Property Examples</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sve-user-mode-default-vector-length-property">SVE User-mode Default Vector Length Property</a></li>
|
||
</ul>
|
||
</li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#sme-cpu-properties">SME CPU Properties</a><ul>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#sme-user-mode-default-vector-length-property">SME User-mode Default Vector Length Property</a></li>
|
||
</ul>
|
||
</li>
|
||
<li class="toctree-l1"><a class="reference internal" href="arm/cpu-features.html#rme-cpu-properties">RME CPU Properties</a><ul>
|
||
<li class="toctree-l2"><a class="reference internal" href="arm/cpu-features.html#rme-level-0-gpt-size-property">RME Level 0 GPT Size Property</a></li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
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