From 19f1537b7b8a9a82665db3ad8210a9d954d13acd Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Mon, 22 Oct 2007 11:24:21 +1000 Subject: 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 --- arch/x86/lguest/Kconfig | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/x86/lguest/Kconfig') diff --git a/arch/x86/lguest/Kconfig b/arch/x86/lguest/Kconfig index 44dccfd845f8..c4dffbeea5e1 100644 --- a/arch/x86/lguest/Kconfig +++ b/arch/x86/lguest/Kconfig @@ -2,8 +2,13 @@ config LGUEST_GUEST bool "Lguest guest support" select PARAVIRT depends on !X86_PAE + select VIRTIO select VIRTIO_RING + select VIRTIO_CONSOLE help Lguest is a tiny in-kernel hypervisor. Selecting this will allow your kernel to boot under lguest. This option will increase your kernel size by about 6k. If in doubt, say N. + + If you say Y here, make sure you say Y (or M) to the virtio block + and net drivers which lguest needs. -- cgit v1.2.2