How can I tell the VMware DbgServer stub to set a processor core during kernel debugging session?

I'm using the VMware DbgServer stub for kernel mode debugging a Windows X86 VM and I want to set a different thread (or processor) in order to get/set the processor context, but the DbgServer replies that the target only has one thread running.

(gdb) info threads

Sending packet:

$T1#85...Ack

Packet received: OK

Sending packet: $qfThreadInfo#bb...Ack

Packet received: m1

Sending packet: $qsThreadInfo#c8...Ack

Packet received: l

...

Thread 1 ( Name: VCPU 0 ) 0x81626a08 in ?? ()

Questions:

1.  How can I tell the VMware DbgServer stub to set a processor core or even another thread during kernel debugging session?

2.  How can I set/get context or stepping from a different thread or processor core?

Any help will be highly appreciated.

Thanks,

Alex.