From: rusty@rustcorp.com.au Subject: [patch 03/43] lguest: Normalize config options for guest support Date: Wed, 26 Sep 2007 16:36:21 +1000 Message-ID: <20070926063645.457927224@rustcorp.com.au> References: <20070926063618.956228976@rustcorp.com.au> Return-path: Content-Disposition: inline; filename=lguest-Kconfig-options.patch List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: lguest@ozlabs.org Cc: Chris Wright , Zach Amsden , virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org 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 Cc: Andi Kleen Cc: Zach Amsden Cc: Jeremy Fitzhardinge Cc: Chris Wright --- arch/i386/Kconfig | 38 ++++++++++++++++++++++++++++---------- arch/i386/xen/Kconfig | 5 +++-- drivers/lguest/Kconfig | 3 +-- 3 files changed, 32 insertions(+), 14 deletions(-) =================================================================== --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -215,27 +215,45 @@ 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 + depends on !(X86_VISWS || X86_VOYAGER) 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 =================================================================== --- a/arch/i386/xen/Kconfig +++ b/arch/i386/xen/Kconfig @@ -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 && !(X86_VISWS || X86_VOYAGER) help This is the Linux Xen port. Enabling this will allow the kernel to boot in a paravirtualized environment under the =================================================================== --- a/drivers/lguest/Kconfig +++ b/drivers/lguest/Kconfig @@ -1,7 +1,6 @@ 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 && !(X86_VISWS || X86_VOYAGER) select HVC_DRIVER ---help--- This is a very simple module which allows you to run -- there are those who do and those who hang on and you don't see too many doers quoting their contemporaries. -- Larry McVoy