IPTE Instruction Fixed; Further Improvements for CTCE Device now supporting z/VM SSI ISFC and RSCS NJE links #50
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Roger,
This is an improved version of two earlier pull request which now includes additional code simplifications and stability improvements after I was able to test all CTCE functionality also under z/VM both under Spinhawk and Hyperion. (I closed the two earlier pull requests to avoid confusion.)
The z/VM DASD EQID fix is also again included in this pull request.
But the most important fix might very well be the correction to the IPTE instruction in "dat.h", which was observed to NEVER invalidate guestregs TLB entries for DAT-OFF guests like CMS. This caused intermittent problems under z/VM. The most frequently occurring problem was that the VM service engine TCPIP (which runs as a CMS guest) did not always start up correctly. But I strongly suspect that a number of other intermittent and not easy reproducible errors under z/VM were also caused by this IPTE problem.
Best regards,
Peter