On 01/04/2012 11:25 AM, Carsten Otte wrote: > This patch allows the user to fault in pages on a virtual cpus > address space for user controlled virtual machines. Typically this > is superfluous because userspace can just create a mapping and > let the kernel's page fault logic take are of it. There is one > exception: SIE won't start if the lowcore is not present. Normally > the kernel takes care of this [handle_validity() in > arch/s390/kvm/intercept.c] but since the kernel does not handle > intercepts for user controlled virtual machines, userspace needs to > be able to handle this condition. There is an alternative, if you can recognize this condition exactly from the hardware fault, you can fault the lowcore yourself and retry. This eliminates a user interface. Is this workable? -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
