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

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Date:	Thu, 8 Aug 2013 16:21:09 -0700
From:	tip-bot for Srivatsa Vaddagiri <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, vatsa@...ux.vnet.ibm.com,
	hpa@...or.com, mingo@...nel.org, gleb@...hat.com,
	raghavendra.kt@...ux.vnet.ibm.com, suzuki@...ibm.com,
	tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/spinlocks] kvm guest :
  Add configuration support to enable debug information for KVM Guests

Commit-ID:  20a89c88f7d2458e12f66d7850cf17deec7daa1c
Gitweb:     http://git.kernel.org/tip/20a89c88f7d2458e12f66d7850cf17deec7daa1c
Author:     Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
AuthorDate: Tue, 6 Aug 2013 17:15:01 +0530
Committer:  H. Peter Anvin <hpa@...ux.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@...ux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20130806114501.20643.5734.sendpatchset@codeblue.in.ibm.com
Signed-off-by: Suzuki Poulose <suzuki@...ibm.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Acked-by: Gleb Natapov <gleb@...hat.com>
Acked-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: H. Peter Anvin <hpa@...ux.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
--
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