Avi Kivity wrote: > On 10/15/2009 01:27 PM, Jan Kiszka wrote: >>> Perhaps it makes sense to query about individual states, including >>> existing ones? That will allow us to deprecate and then phase out >>> broken states. It's probably not worth it. >>> >> You may do this already with the given design: Set up a VCPU, then issue >> KVM_GET_VCPU_STATE on the substate in question. You will either get an >> error code or 0 if the substate is supported. At least no additional >> kernel code required. >> > > No, if some code requires a feature, we don't want to set up a guest and > a vcpu and issue dummy commands in order to find out if we can actually > run that code. > > Feature discovery needs to be a 'system ioctl' in the words of > Documentation/kvm/api.txt. >
OK, added some system IOCTL 'KVM_GET_VCPU_STATE_LIST' to my to-do list. Jan
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