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From: Hu Tao <hutao@cn.fujitsu.com>
Date: Thu, 14 Mar 2013 16:48:47 +0800
Message-Id: <1363250927-20298-1-git-send-email-hutao@cn.fujitsu.com>
Subject: [Qemu-devel] [PATCH] Add pvevent device driver
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To: qemu-devel <qemu-devel@nongnu.org>, "Daniel P. Berrange" <berrange@redhat.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Jan Kiszka <jan.kiszka@siemens.com>, Gleb Natapov <gleb@redhat.com>, Blue Swirl <blauwirbel@gmail.com>, Eric Blake <eblake@redhat.com>, Andrew Jones <drjones@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Sasha Levin <levinsasha928@gmail.com>, Luiz Capitulino <lcapitulino@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, Markus Armbruster <armbru@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Juan Quintela <quintela@redhat.com>, Orit Wasserman <owasserm@redhat.com>, Kevin Wolf <kwolf@redhat.com>, Wen Congyang <wency@cn.fujitsu.com>, "Michael S. Tsirkin" <mst@redhat.com>, Alexander Graf <agraf@suse.de>, Alex Williamson <alex.williamson@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Christian Borntraeger <borntraeger@de.ibm.com>, seabios@seabios.org

pvevent device is used to notify host(qemu) when guest panic
happens.

ref: http://lists.nongnu.org/archive/html/qemu-devel/2013-03/msg02293.html

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
---
 src/acpi-dsdt-isa.dsl | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/acpi-dsdt-isa.dsl b/src/acpi-dsdt-isa.dsl
index 23761db..d083245 100644
--- a/src/acpi-dsdt-isa.dsl
+++ b/src/acpi-dsdt-isa.dsl
@@ -99,4 +99,34 @@ Scope(\_SB.PCI0.ISA) {
             IRQNoFlags() { 3 }
         })
     }
+
+    Device(PEVT) {
+        Name(_HID, "MSFT0001")
+        OperationRegion(PEOR, SystemIO, 0x0505, 0x01)
+        Field(PEOR, ByteAcc, NoLock, Preserve) {
+            PEPT,   8,
+        }
+
+        Method(_STA, 0, NotSerialized) {
+            Store(PEPT, Local0)
+            If (LEqual(Local0, Zero)) {
+                Return (0x00)
+            } Else {
+                Return (0x0F)
+            }
+        }
+
+        Method(RDPT, 0, NotSerialized) {
+            Store(PEPT, Local0)
+            Return (Local0)
+        }
+
+        Method(WRPT, 1, NotSerialized) {
+            Store(Arg0, PEPT)
+        }
+
+        Name(_CRS, ResourceTemplate() {
+            IO(Decode16, 0x0505, 0x0505, 0x01, 0x01)
+        })
+    }
 }
-- 
1.8.1.4