serial/ rs232 and qemu /kvm?

serial/ rs232 and qemu /kvm?

[Marc Weber]

First of all, is this the mailinglist to ask this question? Or should I
ask it on the qemu lists?

I'd like to run WinXP/ Vista within kvm and do microcontroller
programming. My host is linux of course. I had some success using the
qemu pre 0.8 way using slsnif. Setting baud rate to 115200 made some of
the operations work, but most don't.

So is there a way to connect COM1 within the guest to /dev/ttyS0 so that
baud rate settings within the guest will be forwarded to /dev/ttyS0 on
the host?

Marc Weber

Re: serial/ rs232 and qemu /kvm?

[Glauber Costa]

On Tue, Aug 19, 2008 at 11:24 AM, Marc Weber <marco-oweber@gmx.de> wrote:
> First of all, is this the mailinglist to ask this question? Or should I
> ask it on the qemu lists?
>
> I'd like to run WinXP/ Vista within kvm and do microcontroller
> programming. My host is linux of course. I had some success using the
> qemu pre 0.8 way using slsnif. Setting baud rate to 115200 made some of
> the operations work, but most don't.
>
> So is there a way to connect COM1 within the guest to /dev/ttyS0 so that
> baud rate settings within the guest will be forwarded to /dev/ttyS0 on
> the host?

check out for qemu's  "-serial" option

>
> Marc Weber
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>



-- 
Glauber Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."

Re: serial/ rs232 and qemu /kvm?

[Michael Malone]

I have been trying to use kvm to do some microcontroller programming,
mostly with success - until I want to send an ascii NULL down the port.
(I don't know what's going on there, but if you have any ideas, that 
would be
fantastic)Our communication protocol is very touchy about speeds, so the
baud rate was being passed on correctly when I used qemu/kvm like this:
kvm <irrelevant options> -serial /dev/ttyUSB0
(I'm using a usb-serial converter).  You can have up to 4 COM ports by 
repeating
the -serial "device" option.  See the qemu man page for more details 
(yes, it works
just the same when you're invoking it with kvm).

If you're trying to use virt-manager, then don't.
Virt-manager stops you from having access to a bunch of the underlying 
features
of kvm/qemu such as serial ports.  I'm told they're working on it, but 
it's only useful
for a basic setup at the moment.

Michael


Glauber Costa wrote:
> On Tue, Aug 19, 2008 at 11:24 AM, Marc Weber <marco-oweber@gmx.de> wrote:
>   
>> First of all, is this the mailinglist to ask this question? Or should I
>> ask it on the qemu lists?
>>
>> I'd like to run WinXP/ Vista within kvm and do microcontroller
>> programming. My host is linux of course. I had some success using the
>> qemu pre 0.8 way using slsnif. Setting baud rate to 115200 made some of
>> the operations work, but most don't.
>>
>> So is there a way to connect COM1 within the guest to /dev/ttyS0 so that
>> baud rate settings within the guest will be forwarded to /dev/ttyS0 on
>> the host?
>>     
>
> check out for qemu's  "-serial" option
>
>   
>> Marc Weber
>> --
>> To unsubscribe from this list: send the line "unsubscribe kvm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>>     
>
>
>
>   


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Re: serial/ rs232 and qemu /kvm?

[Charles Duffy]

Michael Malone wrote:
> If you're trying to use virt-manager, then don't.
> Virt-manager stops you from having access to a bunch of the underlying 
> features
> of kvm/qemu such as serial ports.  I'm told they're working on it, but 
> it's only useful
> for a basic setup at the moment.

Serial ports *are* available through libvirt, and have been since late 
April.

Using a recent git build of libvirt, I've yet to find anything I'm 
interested in but incapable of (except perhaps USB storage hot-unplug, 
but that's very much just a nice-to-have).

Re: serial/ rs232 and qemu /kvm?

[Michael Malone]

Charles Duffy wrote:
> Michael Malone wrote:
>> If you're trying to use virt-manager, then don't.
>> Virt-manager stops you from having access to a bunch of the 
>> underlying features
>> of kvm/qemu such as serial ports.  I'm told they're working on it, 
>> but it's only useful
>> for a basic setup at the moment.
>
> Serial ports *are* available through libvirt, and have been since late 
> April.
>
> Using a recent git build of libvirt, I've yet to find anything I'm 
> interested in but incapable of (except perhaps USB storage hot-unplug, 
> but that's very much just a nice-to-have).
>
My apologies.  It's more than likely that I'm using Ubuntu and using 
their package (where feature updates are only included every 6months), 
rather than a recent download.
> -- 
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html


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the subject of legal or other privilege, none of which is waived or
lost by reason of this transmission.
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apologies, notify us by return, delete all copies and perform no
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