There will be multiple versions of that address for PSA for each active processor in the LPAR. I don't think that KEY 0 is adequate authority to store there either. Could be done from a hardware console though.
Lennie Dymoke-Bradshaw https://rsclweb.com 'Dance like no one is watching. Encrypt like everyone is.' -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Charles Mills Sent: 22 February 2022 15:27 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: 2.5 Heads Up Would using some "debug" type utility to store a non-zero value at address 4 be a partial circumvention? The pre-Z restart PSW is never used for anything now -- is that correct? Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Jim Mulder Sent: Monday, February 21, 2022 10:03 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: 2.5 Heads Up Location 4 means address 4 (i.e. offset 4 in the PSA). There was a latent bug from a prior release in the loop control code so that it was erroneously fetching from address 4, and behaving especially badly when the data at that location is x'00000000', which it is as of z/OS 2.5. In prior releases, it was x'000130E1' when in zArchitecture mode. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
