Hi Chris,

On Wed, Apr 15, 2020 at 12:49:08PM +0200, Chris Hofer wrote:

Hey,

I'm continuously exploring for my thesis the Genode virtualization on the Imx8q-evk board. Currently the vmm_arm-runscript only allows to specify a static command, which is repeatedly sent to the VM after it booted. In order to run some benchmarks on the VM, I would like to interact with the VM by sending dynamically input.

Is there a way to interactively send input to the TTY of the VM via e.g. the serial interface of the Imx8q-evk? If there is none, can you think of an easy way to build it?

Well, in the example the VM's terminal session is coupled with the terminal session of 'test-terminal_expect_send' via the 'terminal_crosslink' component, which as the name indicates links two terminal clients together. The 'test-terminal_expect_send' just waits for a terminal prompt and whenever it recognizes one prints 'ls'.

Of course, you can replace the test component with some other terminal component, e.g. the 'tcp_terminal' component, which either listens to a TCP port, or connects to one, and then routes all characters in between terminal and network connection. So it is like a telnet terminal. In general, it also possible to ass a "UART to terminal" component, but as the only UART connector is used by the debug output of the kernel/core, you would need to silent those, which is pretty annoying to have no indication if something goes wrong ;-). On the other hand, I would strongly discourage you from simultanously using the UART by kernel and a terminal component.

I hope this helps you further?!

Best regards Stefan

Best,

Chris Hofer

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