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authorRusty Russell <rusty@rustcorp.com.au>2007-10-22 11:24:21 +1000
committerRusty Russell <rusty@rustcorp.com.au>2007-10-23 15:49:56 +1000
commit19f1537b7b8a9a82665db3ad8210a9d954d13acd (patch)
tree793c1f8763350012caa521a55c5778b1c633b7e5 /Documentation/lguest
parent15045275c32bf6d15d32c2eca8157be9c0ba6e45 (diff)
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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