How to tell DMA controller in qemu to terminate transfer ?

[Guenter Roeck]

Hi,

I am trying to fix DMA support with Exynos4210. The original commit
59520dc65e ("hw/arm/exynos4210: Add DMA support for the Exynos4210") doesn't
really work, primarily because it assigns wrong interrupt lines (no idea
how I thought I tested that).

Problem I have right now is that the pl330 peripheral DMA in Exynos4210
depends on a signal from the peripheral device (here: serial ports)
to end a DMA transfer. To make this work, I need a signal from
exynos4210_uart.c to pl330.c to terminate the DMA after the receive
buffer is empty.

How can I implement this in qemu ?

Thanks,
Guenter