linux-kernel - [PATCH 1/2] Allow enabling PARAVIRT without any guest implementation

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Message-ID: <20080122185018.GY7338@blackpad>
Date:	Tue, 22 Jan 2008 16:50:18 -0200
From:	Eduardo Pereira Habkost <ehabkost@...hat.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, glommer@...il.com, tglx@...utronix.de,
	avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, rusty@...tcorp.com.au,
	ak@...e.de, chrisw@...s-sol.org, rostedt@...dmis.org,
	hpa@...or.com, zach@...are.com, roland@...hat.com,
	mtosatti@...hat.com
Subject: [PATCH 1/2] Allow enabling PARAVIRT without any guest
	implementation


On Tue, Jan 22, 2008 at 09:55:41AM -0800, Jeremy Fitzhardinge wrote:
> Eduardo Pereira Habkost wrote:
> >If this is desirable for broader testing, we can make config PARAVIRT
> >visible and selectable on menuconfig, even when there is no guest
> >implementation being enabled. Should I do it?
> >  
> 
> Yes please.
> 

This will allow people to enable the paravirt_ops code even when no
guest support is enabled, for broader testing of the paravirt_ops code.

Signed-off-by: Eduardo Habkost <ehabkost@...hat.com>
---
 arch/x86/Kconfig |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4e910d8..715bbcd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -325,15 +325,6 @@ config SCHED_NO_NO_OMIT_FRAME_POINTER
 
 	  If in doubt, say "Y".
 
-config PARAVIRT
-	bool
-	depends on X86_32 && !(X86_VISWS || X86_VOYAGER)
-	help
-	  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"
 	depends on X86_32
@@ -359,6 +350,15 @@ config VMI
 
 source "arch/x86/lguest/Kconfig"
 
+config PARAVIRT
+	bool "Enable paravirtualization code"
+	depends on X86_32 && !(X86_VISWS || X86_VOYAGER)
+	help
+	  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.
+
 endif
 
 config ACPI_SRAT
-- 
1.5.3.4

-- 
Eduardo
--
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