Re: [Qemu-devel] Guest application reading from pl011 without device driver

[Paolo Bonzini]

On 23/03/2017 18:28, Jiahuan Zhang wrote:
> Hi, the method doesn't work for pipe. It still causes the same issue.
> The only difference is that the first byte in the UART fifo can be read
> by the guest app.
> So now my guest app can immediately read 17bytes when the host is
> sending data continuously,
> then guest app is unable to read.
> 
> Now there is a solution-to-be. Set the qemu pipe chardev to wait for 1
> millisecond before do a next ReadFile(),
> then the pl011 can deliver the complete large data by the 16-byte fifo
> continuously to the guest app.
> 
> Is it rational? Or is this host -CPU-dependent?

Post the patch, maybe you have a bug.

Paolo