QEMU Upstream

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Revision as of 09:46, 13 March 2012 by Ijc (talk | contribs) (Update SeaBIOS information)

How to build QEMU (upstream version) with Xen

Get the source

Build it!

  • Build Xen
    • make xen tools, if it fail see bellow.
  • Build QEMU upstream with Xen
    • For xen-unstable.hg versions between 23412:996c7726a376 and 23632:33717472f37e you will need to copy path_to_xen/tools/libxc/xc_e820.h to $path_to_xen_source/dist/install/usr/include" for configuration script to work. After 23632:33717472f37e xc_e820.h was squashed into xenctrl.h
    • ./configure --enable-xen --target-list=i386-softmmu --extra-cflags="-I$path_to_xen_source/tools/include -I$path_to_xen_source/tools/libxc -I$path_to_xen_source/tools/xenstore" --extra-ldflags="-L$path_to_xen_source/tools/libxc -L$path_to_xen_source/tools/xenstore"
    • make

Troubleshooting compilation errors: If you get an error from configure like "ERROR: User requested feature xen ERROR: configure was not able to find it" then see this: http://xen.1045712.n5.nabble.com/Upstream-Qemu-With-Xen-configuration-problem-td4561779.html , ie. you need to point the paths for "configure" to xen source directory, not to xen dist directory.

Run it!

Either:

  • Add "device_model = path/to/new/qemu" in your VM configuration files.
    • This have been change in the latest xen-unstable tree: now use:
      • device_model_override = '/root/work/qemu/_build/i386-softmmu/qemu'
      • device_model_version = 'qemu-xen'
  • Replace /usr/lib/xen/bin/qemu-dm by the qemu present in i386-softmmu/qemu of the build of QEMU.
 with the last xen-unstable, device_model_version = 'qemu-xen' is needed in the guest configuration file.

Now xl will always try run qemu upstream with seabios, so build xen with seabios.

Use with SeaBIOS

SeaBIOS support is now fully integrated into the Xen build system (in xen-unstable and xen-4.2 onwards) and is always used when using device_model_version = "qemu-xen".

If you want to build a version of SeaBIOS other than the default then you can override SEABIOS_UPSTREAM_URL and/or SEABIOS_UPSTREAM_TAG via .config. For reference the upstream SeaBIOS repository is [[1]].