This is the latest version of the capabilities patch, which should address all concerns which have been raised since the last version. Also attached, example XML produced by different backends. Note as before this has not been tested in the Xen case, because I don't have access to a working Xen machine (laptop still broken, desktop still lacking working SATA drivers, other desktop still lacking wired network...). Rich. -- Emerging Technologies, Red Hat http://et.redhat.com/~rjones/ 64 Baker Street, London, W1U 7DF Mobile: +44 7866 314 421 "[Negative numbers] darken the very whole doctrines of the equations and make dark of the things which are in their nature excessively obvious and simple" (Francis Maseres FRS, mathematician, 1759) <capabilities> <host> <cpu> <arch>x86_64</arch> </cpu> </host> <guest> <os_type>hvm</os_type> <arch name="x86_64"> <wordsize>64</wordsize> <emulator>/usr/bin/qemu-system-x86_64</emulator> <domain type="qemu"/> <machine>pc</machine> <machine>isapc</machine> <domain type="kqemu"/> <domain type="kvm"> <emulator>/usr/bin/qemu-kvm</emulator> </domain> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="i686"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu</emulator> <domain type="qemu"/> <machine>pc</machine> <machine>isapc</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="mips"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-mips</emulator> <domain type="qemu"/> <machine>mips</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="mipsel"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-mipsel</emulator> <domain type="qemu"/> <machine>mips</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="sparc"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-sparc</emulator> <domain type="qemu"/> <machine>sun4m</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="ppc"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-ppc</emulator> <domain type="qemu"/> <machine>g3bw</machine> <machine>mac99</machine> <machine>prep</machine> </arch> </guest> </capabilities> <capabilities> <host> <cpu> <arch>x86_64</arch> </cpu> </host> <guest> <os_type>hvm</os_type> <arch name="x86_64"> <wordsize>64</wordsize> <emulator>/usr/bin/qemu-system-x86_64</emulator> <domain type="qemu"/> <machine>pc</machine> <machine>isapc</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="i686"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu</emulator> <domain type="qemu"/> <machine>pc</machine> <machine>isapc</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="mips"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-mips</emulator> <domain type="qemu"/> <machine>mips</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="mipsel"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-mipsel</emulator> <domain type="qemu"/> <machine>mips</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="sparc"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-sparc</emulator> <domain type="qemu"/> <machine>sun4m</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="ppc"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-ppc</emulator> <domain type="qemu"/> <machine>g3bw</machine> <machine>mac99</machine> <machine>prep</machine> </arch> </guest> </capabilities> <capabilities> <host> <cpu> <arch>i686</arch> <features> <pae/> <nonpae/> </features> </cpu> </host> <guest> <os_type>linux</os_type> <arch name="i686"> <wordsize>32</wordsize> <domain type="test"/> </arch> <features> <pae/> <nonpae/> </features> </guest> </capabilities>