[tip:x86/spinlocks] kvm guest : Add configuration support to enable debug information for KVM Guests

[tip-bot for Srivatsa Vaddagiri <tipbot@zytor.com>]

Commit-ID:  20a89c88f7d2458e12f66d7850cf17deec7daa1c
Gitweb:     http://git.kernel.org/tip/20a89c88f7d2458e12f66d7850cf17deec7daa1c
Author:     Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
AuthorDate: Tue, 6 Aug 2013 17:15:01 +0530
Committer:  H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Thu, 8 Aug 2013 16:07:30 -0700

kvm guest : Add configuration support to enable debug information for KVM Guests

Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20130806114501.20643.5734.sendpatchset@codeblue.in.ibm.com
Signed-off-by: Suzuki Poulose <suzuki@in.ibm.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
 arch/x86/Kconfig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 112e712..b1fb846 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -657,6 +657,15 @@ config KVM_GUEST
 	  underlying device model, the host provides the guest with
 	  timing infrastructure such as time of day, and system time
 
+config KVM_DEBUG_FS
+	bool "Enable debug information for KVM Guests in debugfs"
+	depends on KVM_GUEST && DEBUG_FS
+	default n
+	---help---
+	  This option enables collection of various statistics for KVM guest.
+	  Statistics are displayed in debugfs filesystem. Enabling this option
+	  may incur significant overhead.
+
 source "arch/x86/lguest/Kconfig"
 
 config PARAVIRT_TIME_ACCOUNTING