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Re: [Qemu-devel] x86 emulation on ARM host (Samsung Chromebook)


From: Richard W.M. Jones
Subject: Re: [Qemu-devel] x86 emulation on ARM host (Samsung Chromebook)
Date: Tue, 27 May 2014 12:30:46 +0100
User-agent: Mutt/1.5.20 (2009-12-10)

On Wed, May 21, 2014 at 12:57:59PM +0000, Violaine V. wrote:
> Hi everyone,
> 
> I’m trying to use QEMU (qemu-system-x86_64) to emulate an x86 virtual
> machine on an ARM host : a Samsung Chromebook with Cortex-A15 CPU.

The Chromebook only has 2 GB of RAM and a relatively slow 32 bit
processor, and you're using an SD card which means all I/O is going to
be slow.  Emulation of x86 is going to be very slow and painful.

Anyway I think what you need to do is attach a debugger to find out
what the guest is doing.

http://wiki.qemu.org/Documentation/Debugging

I've no idea if an ARM-compiled gdb will be able to debug an x86 guest
however ...  You may need to cross-compile it somehow.

I'm kind of interested in making this work, but only on 64 bit ARM
hardware where this is more feasible.  People using libguestfs on
aarch64 want to inspect and run commands in their x86 VMs.  There was
a request for this on the mailing list only a couple of weeks ago.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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