On Tuesday, 11/18/2008 at 04:45 EST, Shimon Lebowitz <[EMAIL PROTECTED]> wrote:
> Thank you Alan for the information, but it is still not totally clear to me > what is happening. > It vaguely occurred to me that perhaps somehow SIE was doing it all > now (as I wrote "bypass the simulation") at least when no CPUID had > been set by the user, so I *did* do a CP SET CPUID to a different serial > number, and it still did NOT pass control to HCPBIS. > So, how can I control the value if I do not get control passed to me? > SIE just saved the CPUID (including the user's SET CPUID serial) in > user storage, and I got no chance to alter it. (For reasons I won't go > into now, the part I have been modifying is the model number). > Is there perhaps some way to "degrade" my CP back to software > simulation of that particular instruction? Rather than focusing on interception, focus instead on changing the CPU ID assigned to the virtual machine. Then you don't care about simulation vs. SIE. The field VMDCPUID contains the guest CPU ID. SET CPUID just changes the serial number within it; you need to change the model. Alan Altmark z/VM Development IBM Endicott
