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# Date Author Comment
08942ac1 04/01/2011 07:34 pm Ben Herrenschmidt

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 of
operation, it can be complex to program and slow for others....
00dc738d 04/01/2011 07:34 pm David Gibson

Add PAPR H_VIO_SIGNAL hypercall and infrastructure for VIO interrupts

This patch adds infrastructure to support interrupts from PAPR virtual IO
devices. This includes correctly advertising those interrupts in the
device tree, and implementing the H_VIO_SIGNAL hypercall, used to...
ee86dfee 04/01/2011 07:34 pm David Gibson

Implement TCE translation for sPAPR VIO

This patch implements the necessary infrastructure and hypercalls for
sPAPR's TCE (Translation Control Entry) IOMMU mechanism. This is necessary
for all virtual IO devices which do DMA (i.e. nearly all of them).

Signed-off-by: Ben Herrenschmidt <>...
b45d63b6 04/01/2011 07:34 pm Ben Herrenschmidt

Implement PAPR CRQ hypercalls

This patch implements the infrastructure and hypercalls necessary for the
PAPR specified CRQ (Command Request Queue) mechanism. This general
request queueing system is used by many of the PAPR virtual IO devices,
including the virtual scsi adapter....
4040ab72 04/01/2011 07:34 pm David Gibson

Implement the bus structure for PAPR virtual IO

This extends the "pseries" (PAPR) machine to include a virtual IO bus
supporting the PAPR defined hypercall based virtual IO mechanisms.

So far only one VIO device is provided, the vty / vterm, providing
a full console (polled only, for now)....