[Qemu-devel] Serial port on virtual machines

[Qemu-devel] Serial port on virtual machines

[bala suru]

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Hi,

I'm running VM on kvm-qemu hyper visor . I need to access the serail port on
the VM ,
I tried the sample code to read/write com port but I get port error when
ever I tried write something to the port(dev/ttyS0) .

the same code work fine on the normal OS .. is it the same way  as normal OS
for accessing the serial port in vms ..?

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Re: [Qemu-devel] Serial port on virtual machines

[Mulyadi Santosa]

On Thu, Aug 18, 2011 at 22:00, bala suru <balaqemu@gmail.com> wrote:
> Hi,
>
> I'm running VM on kvm-qemu hyper visor . I need to access the serail port on
> the VM ,
> I tried the sample code to read/write com port but I get port error when
> ever I tried write something to the port(dev/ttyS0) .

try to read the man page...i think you need to enable serial port
first. You might want to use "-serial" option for that case.

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

Re: [Qemu-devel] Serial port on virtual machines

[Rob Landley]

On 08/18/2011 10:00 AM, bala suru wrote:
> Hi,
> 
> I'm running VM on kvm-qemu hyper visor . I need to access the serail
> port on the VM ,
> I tried the sample code to read/write com port but I get port error when
> ever I tried write something to the port(dev/ttyS0) .
> 
> the same code work fine on the normal OS .. is it the same way  as
> normal OS for accessing the serial port in vms ..?

I'm using a serial console in my system images.  Download any the
system-image tarballs at:

  http://landley.net/aboriginal/downloads/binaries/

Then use the "./run-emulator.sh" scripts, which should give you a serial
console in the emulated Linux system connected to qemu's stdin/stdout.
The qemu command line is in that script.

Rb