From: Carsten Otte <carsteno@de.ibm.com>
To: Hannes Reinecke <hare@suse.de>
Cc: Carsten Otte <cotte@de.ibm.com>, Alexander Graf <agraf@suse.de>,
qemu-devel@nongnu.org, Mark Williamson <maw48@cantab.net>,
Aurelien Jarno <aurelien@aurel32.net>
Subject: Re: [Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter
Date: Wed, 25 Nov 2009 11:09:58 +0100 [thread overview]
Message-ID: <4B0D0276.4070207@de.ibm.com> (raw)
In-Reply-To: <20091125083537.GA25731@ochil.suse.de>
Hannes Reinecke wrote:
> So back to the zipl question, it might be an idea to support initially
> the SCSI disk layout only. This has the advantage of being far simpler
> as the DASD disk layout and should be pretty straightforward to handle.
Issue is, the dasd disk layout is made for dasds. For eckd, the boot
code assumes variable blocksize, and the loader uses channel programs.
For both eckd and fba volumes, it assumes IBM disklabels and FICON
channel programs. Virt-IO disks do have an msdos-style partition table
as opposed to this.
That said, you'd need proper virtualiztion of a ficon dasd so that the
guest could possibly run the dasd boot code. Virt-IO disks otoh are
fixed block, have an msdos-style partition table, no channel programs,
and thus look just like scsi disks with a different interface.
Therefore, I think scsi boot is right for virt-IO disks. And zipl does
already create this layout in the version found in Sles11 and FC12.
next prev parent reply other threads:[~2009-11-25 10:09 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
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 [this message]
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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