From: Sasha Levin <sasha.levin@oracle.com>
To: Pekka Enberg <penberg@kernel.org>
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>
Subject: Re: [RFC PATCH 04/11] kvm tools: console: unconditionally output to any console
Date: Fri, 03 May 2013 12:02:14 -0400 [thread overview]
Message-ID: <5183DF86.3040507@oracle.com> (raw)
In-Reply-To: <CAOJsxLGcZys-WYLg=rBON5iaaiHP6g_w-X3GXfpZz-R5BZtjJA@mail.gmail.com>
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
next prev parent reply other threads:[~2013-05-03 16:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-01 15:50 [RFC PATCH 00/11] kvm tools: allow ioport emulation to be used on ARM Will Deacon
2013-05-01 15:50 ` [RFC PATCH 01/11] kvm tools: makefile: factor out libfdt inclusion Will Deacon
2013-05-01 15:50 ` [RFC PATCH 02/11] kvm tools: virtio: move fdt node generation into core mmio code Will Deacon
2013-05-01 15:50 ` [RFC PATCH 03/11] kvm tools: arm: add ioport window to virtual memory map Will Deacon
2013-05-01 15:50 ` [RFC PATCH 04/11] kvm tools: console: unconditionally output to any console Will Deacon
2013-05-03 9:19 ` Pekka Enberg
2013-05-03 16:02 ` Sasha Levin [this message]
2013-05-03 16:09 ` Will Deacon
2013-05-06 21:04 ` Sasha Levin
2013-05-07 2:48 ` Anup Patel
2013-05-05 10:16 ` Asias He
2013-05-01 15:50 ` [RFC PATCH 05/11] kvm tools: allow ioports to be offset from 0 Will Deacon
2013-05-01 15:50 ` [RFC PATCH 06/11] kvm tools: ioport: add arch callback to remap IRQ lines for ioport devices Will Deacon
2013-05-01 15:50 ` [RFC PATCH 07/11] kvm tools: ioport: allow ioport devices to generate fdt nodes Will Deacon
2013-05-01 15:50 ` [RFC PATCH 08/11] kvm tools: 8250: add fdt node generation Will Deacon
2013-05-01 15:50 ` [RFC PATCH 09/11] kvm tools: 8250: add address qualifier to uart name in fdt node Will Deacon
2013-05-01 15:50 ` [RFC PATCH 10/11] kvm tools: ARM: generate fdt nodes for ioport devices Will Deacon
2013-05-01 15:50 ` [RFC PATCH 11/11] kvm tools: ARM: add 8250 console callback to periodic poll Will Deacon
2013-05-03 6:53 ` [RFC PATCH 00/11] kvm tools: allow ioport emulation to be used on ARM Michael Ellerman
2013-05-14 15:29 ` Pekka Enberg
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