From: Arun Sharma <arun.sharma@intel.com>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com
Subject: Are linker scripts needed?
Date: Sun, 22 May 2005 23:00:24 -0700 [thread overview]
Message-ID: <42917178.8080502@intel.com> (raw)
In alt.bk.changesets.1.1508 Keir wrote:
> Some more ioemu config hardcoding. Our 'target arch' is always i386.
> Do we really need linker scripts??
> Signed-off-by: Keir Fraser <keir@xensource.com>
Yes, we do need linker scripts to support VMX guests with large memory
(> 256MB). Without the linker scripts, we found instabilities with a
512MB guest.
The reason for this is, qemu is mapping all of guest physical in it's
address space. The linker script moves all of the qemu text/data/stack
to the upper part of the user virtual to leave a large enough hole for
mapping guest physical using xc_map_foreign.
Our intention is to use qemu for i386, x86-64 and ia64. The
"target-i386-dm" is a misnomer and inherited from upstream. I should
probably kill the concept of a "target architecture" since ioemu is cpu
architecture independent right now.
-Arun
next reply other threads:[~2005-05-23 6:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-23 6:00 Arun Sharma [this message]
2005-05-23 8:02 ` Are linker scripts needed? Keir Fraser
2005-05-23 8:08 ` Keir Fraser
[not found] ` <mailman.1116835533.1955@unix-os.sc.intel.com>
2005-05-24 21:13 ` Arun Sharma
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