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Add a PAPR TCE-bypass mechanism for the pSeries machine
Usually, PAPR virtual IO devices use a virtual IOMMU mechanism, TCEs,to mediate all DMA transfers. While this is necessary for some sorts ofoperation, it can be complex to program and slow for others....
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 TCE translation for sPAPR VIO
This patch implements the necessary infrastructure and hypercalls forsPAPR's TCE (Translation Control Entry) IOMMU mechanism. This is necessaryfor all virtual IO devices which do DMA (i.e. nearly all of them).
Signed-off-by: Ben Herrenschmidt <benh@kernel.crashing.org>...
Implement PAPR CRQ hypercalls
This patch implements the infrastructure and hypercalls necessary for thePAPR specified CRQ (Command Request Queue) mechanism. This generalrequest queueing system is used by many of the PAPR virtual IO devices,including the virtual scsi adapter....
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)....