linux/arch/x86/lguest/Kconfig

config LGUEST_GUEST
	bool "Lguest guest support"
	select PARAVIRT
	depends on X86_32
	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.
Move lguest guest support to arch/x86. Lguest has two sides: host support (to launch guests) and guest support (replacement boot path and paravirt_ops). This moves the guest side to arch/x86/lguest where it's closer to related code. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> 2007-10-22 09:01:54 +08:00			`config LGUEST_GUEST`
			`bool "Lguest guest support"`
			`select PARAVIRT`
x86: remove depends on X86_32 from PARAVIRT & PARAVIRT_GUEST With this, the paravirt_ops code can be enabled on x86_64 also. Each guest implementation (Xen, VMI, lguest) now depends on X86_32. The dependencies can be dropped for each one when they start to support x86_64. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 2008-01-30 20:33:32 +08:00			`depends on X86_32`
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> 2007-10-22 09:24:21 +08:00			`select VIRTIO`
Virtio helper routines for a descriptor ringbuffer implementation These helper routines supply most of the virtqueue_ops for hypervisors which want to use a ring for virtio. Unlike the previous lguest implementation: 1) The rings are variable sized (2^n-1 elements). 2) They have an unfortunate limit of 65535 bytes per sg element. 3) The page numbers are always 64 bit (PAE anyone?) 4) They no longer place used[] on a separate page, just a separate cacheline. 5) We do a modulo on a variable. We could be tricky if we cared. 6) Interrupts and notifies are suppressed using flags within the rings. Users need only get the ring pages and provide a notify hook (KVM wants the guest to allocate the rings, lguest does it sanely). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dor Laor <dor.laor@qumranet.com> 2007-10-22 09:03:40 +08:00			`select VIRTIO_RING`
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> 2007-10-22 09:24:21 +08:00			`select VIRTIO_CONSOLE`
Move lguest guest support to arch/x86. Lguest has two sides: host support (to launch guests) and guest support (replacement boot path and paravirt_ops). This moves the guest side to arch/x86/lguest where it's closer to related code. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> 2007-10-22 09:01:54 +08:00			`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.`
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> 2007-10-22 09:24:21 +08:00
			`If you say Y here, make sure you say Y (or M) to the virtio block`
			`and net drivers which lguest needs.`