From: Carsten Otte <carsteno@de.ibm.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Carsten Otte <cotte@de.ibm.com>, Alexander Graf <agraf@suse.de>,
Aurelien Jarno <aurelien@aurel32.net>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console
Date: Wed, 25 Nov 2009 10:03:01 +0100 [thread overview]
Message-ID: <4B0CF2C5.70800@de.ibm.com> (raw)
In-Reply-To: <4B0C2C24.9060107@codemonkey.ws>
Anthony Liguori wrote:
> What is this used for?
On x86 the kernel uses bios output for early prints. We don't have bios
and do therefore need to bring up a console device as early as possible
so that we can see kernel panics during I/O subsystem detection/startup.
All s390 console devices do support this function (3215/3270 and ASCII
console), and it is used only up to the point when the kernel has its
console subsystem ready to run.
next prev parent reply other threads:[~2009-11-25 9:02 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-24 17:29 [Qemu-devel] [PATCH 00/13] S390x KVM support v4 Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 01/13] S/390 CPU fake emulation Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 02/13] S/390 host/target build system support Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 03/13] S/390 fake TCG implementation Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 04/13] Add KVM support for S390x Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 05/13] Allocate physical memory in low virtual address space Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 06/13] Add support for S390x system emulation Alexander Graf
2009-11-25 11:46 ` Paul Brook
2009-11-25 11:47 ` Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 07/13] Add S390x virtio machine bus Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 08/13] Add S390x virtio machine description Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 09/13] S390 GDB stub Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console Alexander Graf
2009-11-24 18:55 ` Anthony Liguori
2009-11-24 18:56 ` Alexander Graf
2009-11-24 19:25 ` Anthony Liguori
2009-11-24 19:27 ` Alexander Graf
2009-11-24 19:30 ` Anthony Liguori
2009-11-24 19:32 ` Alexander Graf
2009-11-24 19:48 ` Anthony Liguori
2009-11-24 19:58 ` Alexander Graf
2009-11-25 10:00 ` Carsten Otte
2009-11-25 13:14 ` Arnd Bergmann
2009-11-25 13:47 ` Carsten Otte
2009-11-25 9:03 ` Carsten Otte [this message]
2009-11-24 17:29 ` [Qemu-devel] [PATCH 11/13] Set default console to virtio on S390x Alexander Graf
2009-11-24 17:29 ` [Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter Alexander Graf
2009-11-24 18:53 ` Anthony Liguori
2009-11-24 18:56 ` Alexander Graf
2009-11-24 19:26 ` Anthony Liguori
2009-11-24 19:29 ` Alexander Graf
2009-11-24 20:39 ` Mark Williamson
2009-11-24 21:10 ` Anthony Liguori
2009-11-25 8:35 ` Hannes Reinecke
2009-11-25 8:38 ` Alexander Graf
2009-11-25 10:09 ` Carsten Otte
2009-11-25 10:02 ` Carsten Otte
2009-11-25 9:58 ` Carsten Otte
2009-11-25 8:59 ` Carsten Otte
2009-11-24 17:29 ` [Qemu-devel] [PATCH 13/13] Add S390 maintainer information Alexander Graf
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