Re: [libvirt] How libvirt address qemu command line args

On 18.10.2016 14:59, zhunxun(a)gmail.com wrote: > Now I want to add some args about TPM to domain's XML,so I can start a domain by virt-manager or other virsh command,and then ,I would like to use sVIrt security context to label vTPM and correspondingVM,But I do not know how to get these XML args in libvirt. > the key problem is that how can i get and recognize these args!!! > related XML content : Usually, grepping the code for cmd name <-> XML element/attribute translation is sufficient (esp. if you grep tests/) > > <qemu:commandline> > <qemu:arg value='-enable-kvm'/> Firstly, this is obsolete in favour of "-machine accel=kvm". In any case, <domain type='kvm'/> will do the trick (libvirt will use whatever is supported by qemu binary in your system). > <qemu:arg value='-drive'/> > <qemu:arg value='file=/root/nvram_2.0-jin.qcow2,if=none,id=nvram0-0-0,format=qcow2'/> Okay, this is not supported by libvirt yet. We don't really have a way how to specify NVRAM in anything other than a raw file. BTW: isn't qcow too big gun for NVRAM? I mean, NVRAM has a fixed size of what ~190 KB? QCOW header is about the same size. > <qemu:arg value='-device'/> > <qemu:arg value='tpm-tis,tpmdev=tpm-tpm0,id=tpm0'/> > <qemu:arg value='-tpmdev'/> > <qemu:arg value='libtpms,id=tpm-tpm0,nvram=nvram0-0-0,startup=clear'/> I'm not sure there's a way how to put startup=clean on the cmd line. I'm not even sure what it does. And I have not idea what libtpms is either :-) > <qemu:arg value='-bios'/> > <qemu:arg value='/root/xenSeabios/out/bios.bin'/> > </qemu:commandline> >