On 04.03.20 14:25, Christian Borntraeger wrote: > On 04.03.20 12:42, Janosch Frank wrote: >> The POP states that for a list directed IPL the IPLB is stored into >> memory by the machine loader and its address is stored at offset 0x14 >> of the lowcore. >> >> ZIPL currently uses the address in offset 0x14 to access the IPLB and >> acquire flags about secure boot. If the IPLB address points into >> memory which has an unsupported mix of flags set, ZIPL will panic >> instead of booting the OS. >> >> As the lowcore can have quite a high entropy for a guest that did drop >> out of protected mode (i.e. rebooted) we encountered the ZIPL panic >> quite often. >> >> Signed-off-by: Janosch Frank <[email protected]> >> Tested-by: Marc Hartmayer <[email protected]> > > I think this makes sense even without protected virtualization, no? > Unless somebody complains, I think I will pick this up while Conny is > on vacation.
Yes, makes sense! -- Thanks, David / dhildenb
