From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sasha Levin <sasha.levin@oracle.com>
Subject: Re: [RFC PATCH 04/11] kvm tools: console: unconditionally output
 to any console
Date: Fri, 03 May 2013 12:02:14 -0400
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Cc: Will Deacon <will.deacon@arm.com>, Asias He <asias@redhat.com>,
	KVM General <kvm@vger.kernel.org>,
	Marc Zyngier <marc.zyngier@arm.com>, anup@brainfault.org,
	Rusty Russell <rusty@rustcorp.com.au>, pranavkumar@linaro.org,
	Michael Ellerman <michael@ellerman.id.au>
To: Pekka Enberg <penberg@kernel.org>
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On 05/03/2013 05:19 AM, Pekka Enberg wrote:
> On Wed, May 1, 2013 at 6:50 PM, Will Deacon <will.deacon@arm.com> wrote:
>> From: Marc Zyngier <Marc.Zyngier@arm.com>
>>
>> Kvmtool suppresses any output to a console that has not been elected
>> as *the* console.
>>
>> While this makes sense on the input side (we want the input to be sent
>> to one console driver only), it seems to be the wrong thing to do on
>> the output side, as it effectively prevents the guest from switching
>> from one console to another (think earlyprintk using 8250 to virtio
>> console).
>>
>> After all, the guest *does* poke this device and outputs something
>> there.
>>
>> Just remove the kvm->cfg.active_console test from the output paths.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>> Signed-off-by: Will Deacon <will.deacon@arm.com>
> 
> Seems reasonable. Asias, Sasha?
> 

I remember at trying it some time ago but dropped it for a reason I don't
remember at the moment.

Can I have the weekend to play with it to try and figure out why?


Thanks,
Sasha