linux-kernel - [PATCH 01/12] kvm/svm: make nested svm debugging runtime configurable

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Date:	Wed, 29 Jul 2009 14:56:21 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Avi Kivity <avi@...hat.com>
CC:	Alexander Graf <agraf@...e.de>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 01/12] kvm/svm: make nested svm debugging runtime configurable

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kvm/svm.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b720b02..27d26c3 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -49,11 +49,17 @@ MODULE_LICENSE("GPL");
 
 #define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
 
-/* Turn on to get debugging output*/
-/* #define NESTED_DEBUG */
+/* Turn on to get debugging output for nested svm */
+#undef NESTED_DEBUG
 
 #ifdef NESTED_DEBUG
-#define nsvm_printk(fmt, args...) printk(KERN_INFO fmt, ## args)
+
+static int nested_dbg;
+module_param(nested_dbg, bool, 0644);
+
+#define nsvm_printk(fmt, args...)	\
+	if (nested_dbg)			\
+		printk(KERN_INFO fmt, ## args)
 #else
 #define nsvm_printk(fmt, args...) do {} while(0)
 #endif
-- 
1.6.3.3


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