From: Anthony Liguori <anthony@codemonkey.ws>
To: Avi Kivity <avi@redhat.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
Gerd Hoffmann <kraxel@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH 0/2] port over extboot from kvm
Date: Tue, 08 Sep 2009 14:46:33 -0500 [thread overview]
Message-ID: <4AA6B499.5060103@codemonkey.ws> (raw)
In-Reply-To: <4AA6AC56.5020700@redhat.com>
Avi Kivity wrote:
> The bios exports the "bios drives". You can tell grub to load a
> kernel from the first partition of the second disk: (hd1,0) or even
> chain-load another boot loaded from another disk.
The whole point of device.map is that grub doesn't intrinsically know
how to map from bios drives to real drives. In fact, when you
chain-load with grub, you often have to "swap" device mappings which has
the effect of hooking int13 and faking the primary drive for another
OS. See
http://www.gnu.org/software/grub/manual/html_node/DOS_002fWindows.html
All else aside, from a BIOS perspective, you can usually only boot from
0x80 and that can be mapped to different drives via BCV.
Regards,
Anthony Liguori
next prev parent reply other threads:[~2009-09-08 19:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-08 9:17 [Qemu-devel] [PATCH 0/2] port over extboot from kvm Gerd Hoffmann
2009-09-08 9:17 ` [Qemu-devel] [PATCH 1/2] extboot: add option rom Gerd Hoffmann
2009-09-08 9:17 ` [Qemu-devel] [PATCH 2/2] extboot: qemu code Gerd Hoffmann
2009-09-08 11:59 ` [Qemu-devel] [PATCH 0/2] port over extboot from kvm Gerd Hoffmann
2009-09-08 13:47 ` [Qemu-devel] " Jan Kiszka
2009-09-08 14:22 ` Gerd Hoffmann
2009-09-08 14:32 ` Anthony Liguori
2009-09-08 16:05 ` Avi Kivity
2009-09-08 17:21 ` Anthony Liguori
2009-09-08 19:11 ` Avi Kivity
2009-09-08 19:46 ` Anthony Liguori [this message]
2009-09-08 20:00 ` Avi Kivity
2009-09-08 20:10 ` Anthony Liguori
2009-09-12 15:03 ` Kevin O'Connor
2009-09-08 14:40 ` Jan Kiszka
2009-09-08 14:52 ` Gerd Hoffmann
2009-09-08 16:15 ` Jan Kiszka
2009-09-08 17:12 ` Anthony Liguori
2009-09-08 19:03 ` Gerd Hoffmann
2009-09-08 19:39 ` Anthony Liguori
2009-09-12 15:43 ` Kevin O'Connor
2009-09-08 14:16 ` [Qemu-devel] " Anthony Liguori
2009-11-09 16:06 ` Paul Brook
2009-11-09 16:31 ` Gerd Hoffmann
2009-11-09 16:40 ` Anthony Liguori
2009-11-11 13:01 ` Hannes Reinecke
2009-11-11 13:25 ` Anthony Liguori
2009-11-11 13:54 ` Paul Brook
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4AA6B499.5060103@codemonkey.ws \
--to=anthony@codemonkey.ws \
--cc=avi@redhat.com \
--cc=jan.kiszka@siemens.com \
--cc=kraxel@redhat.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).