PowerPC Run - Revision history

HollisBlanchard: replace moinmoin smileys

2009-10-30T16:54:13Z

replace moinmoin smileys

← Older revision		Revision as of 12:54, 30 October 2009
Line 1:		Line 1:
	== Run ==		== Run ==

	~~(!) Consult the [http://bellard.org/qemu/qemu-doc.html QEMU documentation] for a more complete list and explanation of these options.~~

	Log in to target and run:		Log in to target and run:
Line 16:		Line 14:

	The location specified with -L must contain the <code>bamboo.dtb</code> device tree file.		The location specified with -L must contain the <code>bamboo.dtb</code> device tree file.

			{\|
			\|'''Note:''' Consult the [http://bellard.org/qemu/qemu-doc.html QEMU documentation] for a more complete list and explanation of these options.
			\|}

	== virtio ==		== virtio ==
Line 29:		Line 31:
	</code>		</code>

	~~/!\~~ You must have CONFIG_VIRTIO_NET=y in your guest kernel .config.		{\|
			\|'''Note:''' You must have CONFIG_VIRTIO_NET=y in your guest kernel .config.
			\|}

	~~/!\~~ You must have Qemu networking configured to use a <code>tap</code> device. See [[Networking]] for details.		{\|
			\|'''Note:''' You must have Qemu networking configured to use a <code>tap</code> device. See [[Networking]] for details.
			\|}

	=== disk ===		=== disk ===
Line 42:		Line 48:
	The device appears as <code>/dev/vda</code> in the guest.		The device appears as <code>/dev/vda</code> in the guest.

	~~/!\~~ You must have CONFIG_VIRTIO_BLK=y in your guest kernel .config.		{\|
			\|'''Note:''' You must have CONFIG_VIRTIO_BLK=y in your guest kernel .config.
			\|}

	== Known Pitfalls ==		== Known Pitfalls ==

ShaharMintz: /* virtio net requirements */

2009-03-11T08:26:58Z

virtio net requirements

← Older revision		Revision as of 04:26, 11 March 2009
Line 64:		Line 64:
	if [ ! -c /dev/net/tun ]		if [ ! -c /dev/net/tun ]
	then		then
	echo "network init failed - /dev/net/tun does not exist"		echo "network init failed - /dev/net/tun does not exist"
	exit 1		exit 1
	fi		fi

ShaharMintz at 08:26, 11 March 2009

2009-03-11T08:26:21Z

New page

== Run ==

(!) Consult the [http://bellard.org/qemu/qemu-doc.html QEMU documentation] for a more complete list and explanation of these options.

Log in to target and run:

<code>
./qemu-system-ppcemb --enable-kvm \
-nographic \
-m 128 \
-M bamboo \
-kernel uImage.bamboo \
-L . \
-append "your guest kernel command line"
</code>

The location specified with -L must contain the <code>bamboo.dtb</code> device tree file.

== virtio ==
In the case that virtio is activated in the guest kernel, you can add virtio devices at the qemu command line.

Examples (nothing special for ppc):

=== network ===

This adds a virtio network device visible to the guest and the external network:
<code>
./qemu-system-ppcemb [...] -net nic,model=virtio -net tap
</code>

/!\ You must have CONFIG_VIRTIO_NET=y in your guest kernel .config.

/!\ You must have Qemu networking configured to use a <code>tap</code> device. See [[Networking]] for details.

=== disk ===

This adds a virtio disk device:
<code>
./qemu-system-ppcemb [...] -drive file=pathtoyourfile.img,if=virtio
</code>

The device appears as <code>/dev/vda</code> in the guest.

/!\ You must have CONFIG_VIRTIO_BLK=y in your guest kernel .config.

== Known Pitfalls ==
=== no guest console ===
Specifying a console in the guest kernel parameters might let the guest output fail. If you think your output is missing try without any "console=" parameter

=== virtio net requirements ===
You will need to enable tap and bridge support in the host kernel.

You may also need to download and install bridge-utils (use <code>configure --host=i386-linux --target=ppc-linux</code> and all other cross build stuff you need).

Usually embedded boards use a nfs root device, this may conflict with the need to ifdown the device you want to bridge, but you might use the second ethernet device in that case.
You need to edit /etc/qemu-ifup to your needs here is an example that creates bridge br0 on demand and uses eth1 as external device on that bridge:
<code>
#!/bin/bash

bridge=br0
netdev=eth1
guestdev=$1

if [ ! -c /dev/net/tun ]
then
echo "network init failed - /dev/net/tun does not exist"
exit 1
fi

echo "test for existing bridge $bridge"
brctl showmacs $bridge

if [ $? -eq 0 ]
then
echo "ok - bridge $bridge already available"
else
echo "need to create bridge $bridge"
ifconfig $netdev down
brctl addbr $bridge
ifconfig $bridge up
ifconfig $netdev up
brctl addif $bridge $netdev
echo "created bridge $bridge"
brctl show
fi

ifconfig $guestdev up
brctl addif $bridge $guestdev
</code>

----
[[Category:PowerPC]]