From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 22 Oct 2007 01:24:21 +0000 (+1000)
Subject: Lguest support for Virtio
X-Git-Tag: v2.6.24-rc1~28^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19f1537b7b8a9a82665db3ad8210a9d954d13acd;p=pandora-kernel.git

Lguest support for Virtio

This makes lguest able to use the virtio devices.

We change the device descriptor page from a simple array to a variable
length "type, config_len, status, config data..." format, and
implement virtio_config_ops to read from that config data.

We use the virtio ring implementation for an efficient Guest <-> Host
virtqueue mechanism, and the new LHCALL_NOTIFY hypercall to kick the
host when it changes.

We also use LHCALL_NOTIFY on kernel addresses for very very early
console output.  We could have another hypercall, but this hack works
quite well.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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