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This makes it possible to boot images with multiple partitions (the ones ending in .hddimg or .hdddirect) in several ways: runqemu qemux86 core-image-minimal hddimg runqemu tmp/deploy/images/qemux86/core-image-minimal-qemux86.hddimg VM=tmp-glibc/deploy/images/qemux86/iot-os-image-qemux86.hddimg FSTYPE=hddimg runqemu Same for hdddirect. This is useful for testing initramfs scripts, secure boot (when switching to UEFI), or boot loaders like syslinux. For testing the content of the rootfs, the ext4 image is better because that approach is faster (no need to create another large image during build, rootfs can be read directly instead of reading boot.img through loop device). When booting a live image, the kernel, initramfs (if any) and kernel parameters are taken from the image by the virtual machine's BIOS, so any additional kernel parameters given to runqemu are ignored. This can be avoided (already without this change) in a slightly hacky runqemu setup: ROOTFS=tmp/deploy/images/qemux86/core-image-minimal-qemux86.hddimg \ FSTYPE=ext4 \ KERNEL=tmp/deploy/images/qemux86/bzImage-initramfs-qemux86.bin \ MACHINE=qemux86 \ runqemu serial kvm nographic 'bootparams=root=/dev/ram0' The additional bzImage-initramfs-qemux86.bin kernel here was created by adding this to local.conf: INITRAMFS_IMAGE = "core-image-minimal-initramfs" INITRAMFS_IMAGE_BUNDLE = "1" In the code, the new FSTYPE=hddimg resp. hdddirect behaves almost exactly like the older vmdk FSTYPE. New types were chosen because it seemed cleaner than using FSTYPE=vmdk when the actual image pointed to by VM is not in that format. The downside is that several checks for FSTYPE=vmdk had to be duplicated for FSTYPE=hddimg. The VM variable now gets interpreted as "virtual machine disk image" instead of "vmdk image". (From OE-Core rev: 37741c539f5d3021e59828b49e968cd42b89a368) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with IDE integration.
Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions of OpenEmbedded. It is distro-less (can build a functional image with DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website: http://www.openembedded.org/
Where to Send Patches
As Poky is an integration repository (built using a tool called combo-layer), patches against the various components should be sent to their respective upstreams:
bitbake: Git repository: http://git.openembedded.org/bitbake/ Mailing list: bitbake-devel@lists.openembedded.org
documentation: Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/ Mailing list: yocto@yoctoproject.org
meta-yocto(-bsp): Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp) Mailing list: poky@yoctoproject.org
Everything else should be sent to the OpenEmbedded Core mailing list. If in doubt, check the oe-core git repository for the content you intend to modify. Before sending, be sure the patches apply cleanly to the current oe-core git repository.
Git repository: http://git.openembedded.org/openembedded-core/
Mailing list: openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of oe-core and poky-specific files.