On 11/03/2017 09:14 AM, Harald Freudenberger wrote: > I talked with the firmware guys about this. > The answer is that the AP 3 instructions (NQAP, DQAP, PQAP) are always available. That is true for basic mode and LPAR, but certainly not for z/VM or KVM guests. > Tony is right with the facility bits. > facility bit 15 tells if the T bit is supported with the PQAP(TAPQ) subcommand, > facility bit 12 tells if the PQAP(QCI) subcommand is available. > > As far as I could discover the AP instructions where optional on some older machines. > This may be the reason why zVM throws an exception if there is no AP device assigned. > However, for all machines still in service the AP instructions are available at al time. We have to distinguish LPARs and 2nd level guests under KVM/z/VM. For those 2nd level guests there are configurations out there TODAY that do not support PQAP and friends. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
