OK, I screwed up and sent the old 1/3. This was supposed to be 1/3, and
there is no 3. I'm stupid.
Be nice to get acks from Jeremy and Zach as it's their original
penmanship.
Cheers,
Rusty.
---
Normalize config options for guest support
1) Group all the "guest OS" support options together, under a PARAVIRT_GUEST
menu.
2) Make those options select CONFIG_PARAVIRT, as suggested by Andi.
3) Make kconfig help titles consistent.
Signed-off-by: Rusty Russell <[email protected]>
---
arch/i386/Kconfig | 33 ++++++++++++++++++++-------------
arch/i386/xen/Kconfig | 1 +
2 files changed, 21 insertions(+), 13 deletions(-)
diff -r 1c1fc74a471c arch/i386/Kconfig
--- a/arch/i386/Kconfig Tue Sep 25 14:05:39 2007 +1000
+++ b/arch/i386/Kconfig Tue Sep 25 14:06:19 2007 +1000
@@ -215,27 +215,44 @@ endchoice
endchoice
config PARAVIRT
- bool "Paravirtualization support (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ bool
depends on !(X86_VISWS || X86_VOYAGER)
help
- Paravirtualization is a way of running multiple instances of
- Linux on the same machine, under a hypervisor. This option
- changes the kernel so it can modify itself when it is run
- under a hypervisor, improving performance significantly.
- However, when run without a hypervisor the kernel is
- theoretically slower. If in doubt, say N.
+ This changes the kernel so it can modify itself when it is run
+ under a hypervisor, potentially improving performance significantly
+ over full virtualization. However, when run without a hypervisor
+ the kernel is theoretically slower and slightly larger.
+
+menuconfig PARAVIRT_GUEST
+ bool "Paravirtualized guest support"
+ help
+ Say Y here to get to see options related to running Linux under
+ various hypervisors. This option alone does not add any kernel code.
+
+ If you say N, all options in this submenu will be skipped and disabled.
+
+if PARAVIRT_GUEST
source "arch/i386/xen/Kconfig"
config VMI
- bool "VMI Paravirt-ops support"
- depends on PARAVIRT
+ bool "VMI Guest support"
+ select PARAVIRT
help
VMI provides a paravirtualized interface to the VMware ESX server
(it could be used by other hypervisors in theory too, but is not
at the moment), by linking the kernel to a GPL-ed ROM module
provided by the hypervisor.
+
+config LGUEST_GUEST
+ bool "Lguest guest support"
+ select PARAVIRT
+ depends on !X86_PAE
+ 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.
+endif
config ACPI_SRAT
bool
diff -r 1c1fc74a471c arch/i386/xen/Kconfig
--- a/arch/i386/xen/Kconfig Tue Sep 25 14:05:39 2007 +1000
+++ b/arch/i386/xen/Kconfig Tue Sep 25 14:06:19 2007 +1000
@@ -3,8 +3,9 @@
#
config XEN
- bool "Enable support for Xen hypervisor"
- depends on PARAVIRT && X86_CMPXCHG && X86_TSC && !NEED_MULTIPLE_NODES
+ bool "Xen guest support"
+ select PARAVIRT
+ depends on X86_CMPXCHG && X86_TSC && !NEED_MULTIPLE_NODES
help
This is the Linux Xen port. Enabling this will allow the
kernel to boot in a paravirtualized environment under the
diff -r 1c1fc74a471c drivers/lguest/Kconfig
--- a/drivers/lguest/Kconfig Tue Sep 25 14:05:39 2007 +1000
+++ b/drivers/lguest/Kconfig Tue Sep 25 14:05:39 2007 +1000
@@ -1,23 +1,18 @@ config LGUEST
config LGUEST
tristate "Linux hypervisor example code"
- depends on X86 && PARAVIRT && EXPERIMENTAL && !X86_PAE && FUTEX
- select LGUEST_GUEST
+ depends on X86 && EXPERIMENTAL && !X86_PAE && FUTEX
select HVC_DRIVER
---help---
- This is a very simple module which allows you to run
- multiple instances of the same Linux kernel, using the
+ This is a very simple module called lg.ko which allows you to run
+ multiple instances of the Linux kernel, using the
"lguest" command found in the Documentation/lguest directory.
Note that "lguest" is pronounced to rhyme with "fell quest",
not "rustyvisor". See Documentation/lguest/lguest.txt.
+ Usually you would also turn on "Lguest guest support", to create a
+ kernel which can also boot under lguest.
+
If unsure, say N. If curious, say M. If masochistic, say Y.
-
-config LGUEST_GUEST
- bool
- help
- The guest needs code built-in, even if the host has lguest
- support as a module. The drivers are tiny, so we build them
- in too.
config LGUEST_NET
tristate
-
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