> -----Original Message----- > From: IBM Mainframe Assembler List <ASSEMBLER- > l...@listserv.uga.edu> On Behalf Of Bob Raicer > Sent: 07 June 2022 01:13 > To: ASSEMBLER-LIST@LISTSERV.UGA.EDU > Subject: Storage-Key-Removal Facility > > While browsing the SA22-7832-13 version of Principles of Operation I saw this > text on Page 1-28: > > |Storage-Key-Removal Facility > | > |The storage-key-removal facility may be available on a model > |implementing z/Architecture. A configuration with the > |storage-key-removal facility installed does not have the ability to use > |any key protection mechanisms. Setting or reading of a storage key is > |prohibited and the PSW key and any specified key must be zero otherwise > |an exception condition is recognized. > > Can any of you provide some insight regarding the motivation for the > introduction of this facility, and perhaps what operating system might exploit > it?
Perhaps its to stop you running some products...... ... and CPUs with this feature might be cheaper.... > > Thanks. > > Bob Dave G4UGM
