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Add new guide to help those that are looking for to emulate instead o…
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…f use physical boards
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camilamacedo86 committed Sep 23, 2023
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111 changes: 111 additions & 0 deletions source/getting-started/emulation-with-qemu/index.rst
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.. _gs-emulation-with-qemu:

Device Emulation Using QEMU
=============================

.. note::

This tutorial is designed to assist you in getting started with using QEMU to emulate devices on your desktop. Please note that we are selecting a specific FoundriesFactory® to establish an environment for experimenting with the Foundries® solution. This approach will enable you to engage with subsequent tutorials and enhance your skills.

Prerequisites and Pre-Work
---------------------------

- Ensure that you have installed `QEMU <https://www.qemu.org/download/>`_.
- Create a :ref:`ref-factory` for the platform ``QEMU Arm 64 bit`` as described in the guide :ref:`gs-select-platform`:

.. figure:: /_static/qemu/example_factory_arm64.png
:width: 900
:align: center
:alt: QEMU Arm 64 bit example factory

Emulating Device
--------------------------

1. Go to the `Targets` tab of your Factory and download the ``lmp-base-console-image-qemuarm64-secureboot.wic.gz`` image and the ``flash.bin``:

.. figure:: /_static/qemu/example_required_artefacts.png
:width: 900
:align: center
:alt: Artefacts which are required to run the image with QEMU

2. Make a directory for the artifacts and cd into it:

.. code-block:: shell
mkdir -p lmp-qemu/arm64
cd lmp-qemu/arm64
3. Copy the Artefacts to the ``lmp-qemu/arm64`` directory :

.. code-block:: shell
cp <path-where-dir>/lmp-base-console-image-qemuarm64-secureboot.wic.gz .
cp <path-where-dir>/flash.bin .
4. Decompress the image:

.. code-block:: shell
gunzip lmp-base-console-image-qemuarm64-secureboot.wic.gz
5. Convert the Disk to QCOW2 Format:

Use ``qemu-img`` to convert your raw disk image to the QCOW2 format. This step can sometimes make the image more amenable to virtualization.

.. code-block:: shell
qemu-img convert -f raw -O qcow2 lmp-base-console-image-qemuarm64-secureboot.wic lmp-base-console-image-qemuarm64-secureboot.qcow2
6. Resize the Image:

Resize the new QCOW2 image to a size that’s a multiple of the sector size. Let’s resize it to 4GB for simplicity.

.. code-block:: shell
qemu-img resize lmp-base-console-image-qemuarm64-secureboot.qcow2 4G
7. Run QEMU with the New Image:

Once you’ve converted and resized the image, you can then use it with your QEMU command.

.. code-block:: shell
qemu-system-aarch64 \
-m 2048 \
-cpu cortex-a57 \
-smp 2 \
-machine acpi=off \
-bios flash.bin \
-device virtio-net-device,netdev=net0,mac=52:54:00:12:35:02 \
-device virtio-serial-device \
-drive id=disk0,file=lmp-base-console-image-qemuarm64-secureboot.qcow2,if=none,format=qcow2 \
-device virtio-blk-device,drive=disk0 \
-netdev user,id=net0,hostfwd=tcp::2222-:22 \
-object rng-random,filename=/dev/urandom,id=rng0 \
-device virtio-rng-pci,rng=rng0 \
-chardev null,id=virtcon \
-machine virt,secure=on \
-nographic
8. Log into the booted system:

By default, the ``username`` and ``password`` to log in your device after boot are ``fio/fio``. We recommend changing them once you are in development.

.. figure:: /_static/qemu/example_login.png
:width: 900
:align: center
:alt: Login

.. note::

If you are not prompted for login, press ``Enter`` to check if it gets displayed.

.. note::

If you encounter a QEMU terminal where common commands like ``ls`` are unresponsive, it may indicate an issue. A missing login prompt likely means that your image did not boot successfully.
For this specific platform, we use the ``-bios=flash.bin`` flag to boot the system. However, the flags and configurations may vary based on the selected platform.

Next Step
--------------------------

At this point, you have successfully set up the device. You are now able to :ref:`gs-register` and proceed with the following tutorials.
4 changes: 4 additions & 0 deletions source/getting-started/flash-device/index.rst
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Expand Up @@ -21,6 +21,10 @@ Prerequisites and Pre-Work
- Ethernet cable (if choosing Wired)
- Console access to your hardware via UART serial (if choosing WiFi)

.. note::

If you are just getting started and prefer to emulate the device rather than using a physical board, make sure to refer to the guide :ref:`gs-emulation-with-qemu`. Following this guide will lead you through "Flashing the Image" just like this guide, enabling you to proceed with the subsequent steps to :ref:`gs-register`.

.. _gs-download:

Downloading the LmP System Image
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1 change: 1 addition & 0 deletions source/index.rst
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Expand Up @@ -16,6 +16,7 @@ OE/Yocto Project, the Linux microPlatform™ and Docker®.
getting-started/register-device/index
getting-started/install-fioctl/index
getting-started/building-deploying-app/index
getting-started/emulation-with-qemu/index

.. toctree::
:maxdepth: 1
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3 changes: 3 additions & 0 deletions source/reference-manual/qemu/qemu.rst
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Expand Up @@ -11,3 +11,6 @@ Qemu
arm64
riscv64

.. note::

If you are just getting started and prefer to emulate the device rather than using a physical board, make sure to refer to the guide :ref:`gs-emulation-with-qemu`. Following this guide will lead you through the same result of :ref:`gs-flash-device`, enabling you to proceed with the subsequent steps to :ref:`gs-register`.

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