[PATCH v13 8/8] pv event: add document to describe the usage

[Hu Tao]

Signed-off-by: Hu Tao <hutao@xxxxxxxxxxxxxx>
---
 docs/pv-event.txt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 docs/pv-event.txt

diff --git a/docs/pv-event.txt b/docs/pv-event.txt
new file mode 100644
index 0000000..ac9e7fa
--- /dev/null
+++ b/docs/pv-event.txt
@@ -0,0 +1,17 @@
+KVM PV EVENT
+============
+
+kvm pv event allows guest OS to notify host OS of some events, for
+example, guest panic. Currently, there is one event supported, that
+is, guest panic. More events can be added later.
+
+By default, kvm pv event is disabled. In order to enable it, you have
+to specify enable_pv_event=on for -machine command line option, along
+with -global kvm_pv_event.panicked_action to specify the action taken
+when panic event has occurred. Aviable panic actions are: "none",
+"pause", "poweroff" and "reset". Following is example:
+
+  qemu-system-x86_64 -enable-kvm -machine pc-0.12,enable_pv_event=on \
+    -global kvm_pv_event.panicked_action=pause <other options>
+
+kvm pv event needs kvm support.
-- 
1.8.1.4

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