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Re: [Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter

From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH 12/13] Add zipl bootloader interpreter
Date: Tue, 24 Nov 2009 12:53:43 -0600
User-agent: Thunderbird (X11/20090825)

Alexander Graf wrote:
The default bootloader on S390 is zipl. Because we don't emulate normal S390
hardware we need to write our own parser for the bootloader configuration,
so we can boot off real hard disks.

This patch adds a pretty simple implementation of such an interpreter. It only
supports 512 bytes sector sizes, always boots the default entry and doesn't
work with reboots yet. But it's better than nothing.

This is a bit unfortunate. Wouldn't it be better to write a custom version of zipl that ran in the guest?

This is like implementing grub in qemu (or pygrub in Xen). The level of security exposure this introduces is really scary.


Anthony Liguori

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