On 15.02.2018 23:54, Collin L. Walling wrote: > The s390-ccw firmware needs some information in support of the > boot process which is not available on the native machine. > Examples are the netboot firmware load address and now the > boot menu parameters. > > While storing that data in unused fields of the IPL parameter block > works, that approach could create problems if the parameter block > definition should change in the future. Because then a guest could > overwrite these fields using the set IPLB diagnose. > > In fact the data in question is of more global nature and not really > tied to an IPL device, so separating it is rather logical. > > This commit introduces a new structure to hold firmware relevant > IPL parameters set by QEMU. The data is stored at location 204 (dec) > and can contain up to 7 32-bit words. This area is available to > programming in the z/Architecture Principles of Operation and > can thus safely be used by the firmware until the IPL has completed. > > Signed-off-by: Viktor Mihajlovski <mihaj...@linux.vnet.ibm.com> you might want to add your s-o-b here ... [...] -- Regards, Viktor Mihajlovski
