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Figure Out PetaLinux Yocto Version (PetaLinux >= 2020.1)

Updated: Jun 2, 2023


Note: This guide is for PetaLinux version 2020.1 and newer. For PetaLinux versions up to and including 2019.2, see this older post.


Summary


This guide will show you how to find the version of Yocto used by PetaLinux. To do that, you'll need to create a PetaLinux project from a BSP or hardware export, then get the Yocto version from a file in the created project.


Known Versions


Here are the Yocto versions used by some PetaLinux versions that we've tested:


2020.1 and 2020.2: 3.0.1 ("zeus")

2021.1: We haven't tested this PetaLinux version.

2021.2: 3.2.3 ("gatesgarth")

2022.1 and 2022.2: 3.4.1 ("honister")

2023.1: 4.1.2 ("langdale")


HOWTO


First, if you don't already have a PetaLinux BSP or hardware export, download a BSP from the AMD's downloads site:

Pick a PetaLinux version in the left sidebar or from the Archive, then ctrl-f for "ZC702" and download the "ZC702 BSP". It doesn't matter which board BSP you get; ZC702 is one of the smaller downloads.


Next, source the PetaLinux tools and create a PetaLinux project from the BSP:

source /tools/Xilinx/PetaLinux/<version>/settings.sh

petalinux-create -t project -s /path/to/bsp/file.bsp

This'll create a folder named something like "xilinx-zc702-2022.2" or "xilinx-zcu102-2021.2" or "xilinx-vck190-2023.1"


Cd into that folder and run petalinux-config to fully initialize the created project:

cd <new petalinux project folder>

petalinux-config --silentconfig

Note the second line printed by petalinux-config:

[INFO] Extracting yocto SDK to components/yocto. This may take time!

It's extracting the Yocto SDK by running the script at: /tools/Xilinx/PetaLinux/<version>/components/yocto/source/<arch>


Next, get the Yocto version from poky.conf in the extracted Yocto SDK:

head -n5 $(find . -name poky.conf)

This will print something like:

DISTRO = "poky"
DISTRO_NAME = "Poky (Yocto Project Reference Distro)"
DISTRO_VERSION = "3.2.3"
DISTRO_CODENAME = "gatesgarth"
SDK_VENDOR = "-pokysdk"

The bold lines are the Yocto version.


For reference, this is the path to poky.conf from the PetaLinux project root:

2020.1 thru 2022.2:
components/yocto/layers/core/meta-poky/conf/distro/poky.conf
2023.1:
components/yocto/layers/poky/meta-poky/conf/distro/poky.conf

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