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19f1537b7b
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>
15 lines
447 B
Plaintext
15 lines
447 B
Plaintext
config LGUEST_GUEST
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bool "Lguest guest support"
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select PARAVIRT
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depends on !X86_PAE
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select VIRTIO
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select VIRTIO_RING
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select VIRTIO_CONSOLE
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help
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Lguest is a tiny in-kernel hypervisor. Selecting this will
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allow your kernel to boot under lguest. This option will increase
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your kernel size by about 6k. If in doubt, say N.
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If you say Y here, make sure you say Y (or M) to the virtio block
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and net drivers which lguest needs.
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