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[Qemu-devel] [PATCH v21 6/8] pvpanic: add document of pvpanic
From: |
Hu Tao |
Subject: |
[Qemu-devel] [PATCH v21 6/8] pvpanic: add document of pvpanic |
Date: |
Fri, 26 Apr 2013 11:24:45 +0800 |
Signed-off-by: Hu Tao <address@hidden>
---
docs/specs/pvpanic.txt | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 docs/specs/pvpanic.txt
diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt
new file mode 100644
index 0000000..c7bbacc
--- /dev/null
+++ b/docs/specs/pvpanic.txt
@@ -0,0 +1,39 @@
+PVPANIC DEVICE
+==============
+
+pvpanic device is a simulated ISA device, through which a guest panic
+event is sent to qemu, and a QMP event is generated. This allows
+management apps (e.g. libvirt) to be notified and respond to the event.
+
+The management app has the option of waiting for GUEST_PANICKED events,
+and/or polling for guest-panicked RunState, to learn when the pvpanic
+device has fired a panic event.
+
+ISA Interface
+-------------
+
+pvpanic exposes a single I/O port, by default 0x505. On read, the bits
+recognized by the device are set. Software should ignore bits it doesn't
+recognize. On write, the bits not recognized by the device are ignored.
+Software should set only bits both itself and the device recognize.
+Currently, only bit 0 is recognized, setting it indicates a guest panic
+has happened.
+
+ACPI Interface
+--------------
+
+pvpanic device is defined with ACPI ID "QEMU0001". Custom methods:
+
+RDPT: To determine whether guest panic notification is supported.
+Arguments: None
+Return: Returns a byte, bit 0 set to indicate guest panic
+ notification is supported. Other bits are reserved and
+ should be ignored.
+
+WRPT: To send a guest panic event
+Arguments: Arg0 is a byte, with bit 0 set to indicate guest panic has
+ happened. Other bits are reserved and should be cleared.
+Return: None
+
+The ACPI device will automatically refer to the right port in case it
+is modified.
--
1.8.1.4
- [Qemu-devel] [PATCH v21 2/8] add a new qevent: QEVENT_GUEST_PANICKED, (continued)
- [Qemu-devel] [PATCH v21 2/8] add a new qevent: QEVENT_GUEST_PANICKED, Hu Tao, 2013/04/25
- [Qemu-devel] [PATCH v21 4/8] fw_cfg: add required header files, Hu Tao, 2013/04/25
- [Qemu-devel] [PATCH v21 5/8] pvpanic: pass configurable ioport to seabios, Hu Tao, 2013/04/25
- [Qemu-devel] [PATCH v21 3/8] introduce a new qom device to deal with panicked event, Hu Tao, 2013/04/25
- [Qemu-devel] [PATCH v21 7/8] pvpanic: create pvpanic by default for machine 1.5, Hu Tao, 2013/04/25
- [Qemu-devel] [PATCH v21 6/8] pvpanic: add document of pvpanic,
Hu Tao <=
- [Qemu-devel] [PATCH v21 8/8] Wire up disabled wait a panicked event on s390, Hu Tao, 2013/04/25