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Add PAPR H_VIO_SIGNAL hypercall and infrastructure for VIO interrupts
This patch adds infrastructure to support interrupts from PAPR virtual IOdevices. This includes correctly advertising those interrupts in thedevice tree, and implementing the H_VIO_SIGNAL hypercall, used to...
Implement the bus structure for PAPR virtual IO
This extends the "pseries" (PAPR) machine to include a virtual IO bussupporting the PAPR defined hypercall based virtual IO mechanisms.
So far only one VIO device is provided, the vty / vterm, providinga full console (polled only, for now)....