Re: [Xen-devel] Question about running Xen on NVIDIA Jetson-TK1

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

> - The serial controller on the Tegra SoCs doesn't behave in the same
> was as most NS16550-compatibles; it actually adheres to the NS16550
> spec a little more rigidly than most compatible controllers. A
> coworker (Chris Patterson, cc'd) figured out what was going on; from
> what I understand, most 16550s generate the "transmit ready" interrupt
> once, when the device first can accept new FIFO entries. Both the
> original 16550 and the Tegra implementation generate the "transmit
> ready" interrupt /continuously/ when there's space available in the
> FIFO, slewing the CPU with a stream of constant interrupts.

That may also be an issue on x86 I would think.

Is there some simple 16550 'fix' for this? As in reprogram it
to not be soo ready?

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