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authorFeng(Eric) Liu <eric.e.liu@intel.com>2008-04-10 16:47:53 +0400
committerAvi Kivity <avi@qumranet.com>2008-04-27 13:01:22 +0400
commitd4c9ff2d1b78e385471b3f4d80c0596909926ef7 (patch)
tree5551c0f6c56439df39ca434115840f4e36cee2ea /arch
parent048354c8e6bf95e7347f623d8a0da5b89e216405 (diff)
downloadlinux-d4c9ff2d1b78e385471b3f4d80c0596909926ef7.tar.xz
KVM: Add kvm trace userspace interface
This interface allows user a space application to read the trace of kvm related events through relayfs. Signed-off-by: Feng (Eric) Liu <eric.e.liu@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/Kconfig11
-rw-r--r--arch/x86/kvm/Makefile3
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 76c70ab44382..8d45fabc5f3b 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -50,6 +50,17 @@ config KVM_AMD
Provides support for KVM on AMD processors equipped with the AMD-V
(SVM) extensions.
+config KVM_TRACE
+ bool "KVM trace support"
+ depends on KVM && MARKERS && SYSFS
+ select RELAY
+ select DEBUG_FS
+ default n
+ ---help---
+ This option allows reading a trace of kvm-related events through
+ relayfs. Note the ABI is not considered stable and will be
+ modified in future updates.
+
# OK, it's a little counter-intuitive to do this, but it puts it neatly under
# the virtualization menu.
source drivers/lguest/Kconfig
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 4d0c22e11f1a..c97d35c218db 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -3,6 +3,9 @@
#
common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o)
+ifeq ($(CONFIG_KVM_TRACE),y)
+common-objs += $(addprefix ../../../virt/kvm/, kvm_trace.o)
+endif
EXTRA_CFLAGS += -Ivirt/kvm -Iarch/x86/kvm