On Wed, 2015-01-28 at 14:15 -0600, Segher Boessenkool wrote:
> On Tue, Jan 27, 2015 at 03:57:53PM -0600, Scott Wood wrote:
> > At this point, given the previous discussion, does anyone object to
> > removing the readback entirely? Do we have any evidence that reading
> > WHOAMI is effective at add
On Tue, Jan 27, 2015 at 03:57:53PM -0600, Scott Wood wrote:
> At this point, given the previous discussion, does anyone object to
> removing the readback entirely? Do we have any evidence that reading
> WHOAMI is effective at addressing whatever problem reading EOI made go
> away on the relevant p
On Tue, 2015-01-27 at 15:19 +, Bogdan Purcareata wrote:
> The readback acts as a synchronization mechanism in handling external
> interrupts, making sure the core waits until EOI write completion. This is
> required in certain scenarios, such as when the MPIC communicates with a PCI
> device in
The readback acts as a synchronization mechanism in handling external
interrupts, making sure the core waits until EOI write completion. This is
required in certain scenarios, such as when the MPIC communicates with a PCI
device in posted write mode. If the device uses legacy interrupts, and the CP
