linux-kernel - Re: [PATCH 0/2] Early printk support for virtio console devices.

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Message-ID: <CAFEAcA9Vp0H9TMqHg+R+Kv0TzrQoCAt0Gr9c9DE94omp78XXig@mail.gmail.com>
Date:	Fri, 26 Apr 2013 16:19:13 +0100
From:	Peter Maydell <peter.maydell@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linaro-kernel@...ts.linaro.org, Anup Patel <anup.patel@...aro.org>,
	patches@...aro.org,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	Alexander Graf <agraf@...e.de>, kvmarm@...ts.cs.columbia.edu,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/2] Early printk support for virtio console devices.

On 26 April 2013 13:33, Arnd Bergmann <arnd@...db.de> wrote:
> Couldn't kvmtool implement the interface used by smh_printch()
> for early output instead?
>
> Or if that's not a fitting inteface, maybe a psci call for writing
> a character to the console?

I suggested that earlier:
https://lists.cs.columbia.edu/pipermail/kvmarm/2013-April/005433.html

and Alex pointed out that s390-virtio experience with that
approach is that it's awkward for userspace.

-- PMM
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