[libvirt] Can jobs suck like qemu-pr-helper does be transfered to libvirtd?

[Zhangbo (Oscar)]

Hi all:
	qemu-pr-helper exits to help qemu do the high-privileged scsi related jobs. LIBVIRTD is responsible to launch qemu-pr-helper and qemu, and set selinux/DAC labels for them and their socket.

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#                                   ___________
#                       ___________|libvirtd     |__________                                       
#                      |           |___________|          |                                      
#                      |                 |                |                                      
#                      |                 |                |                                      
#             _________|________    _____|______       ___|____                                  
#            | qemu-pr-helper     |__| vm1.sock    |_____| qemu1  |                                 
#            |__________________|  |____________|     |________|                                 

There may be other jobs quite like qemu-pr-helper, shall we make them as "complex" as the qemu-pr-helper scheme? 
Will it be OK to just let qemu send an EVENT to libvirtd, and let libvirtd do the SCSI/other jobs? Will it be OK if we remove qemu-pr-helper and similar processes?
What's the disadvantage if we let libvirtd do there high privileged jobs instead qemu-pr-helper-like processes?

Thanks!