[PATCH v2 3/3] hw/misc/pvpanic: add support for normal shutdowns

["Thomas Weißschuh" <thomas@t-8ch.de>]

Shutdown requests are normally hardware dependent.
By extending pvpanic to also handle shutdown requests, guests can
submit such requests with an easily implementable and cross-platform
mechanism.

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---
 docs/specs/pvpanic.rst                   | 2 ++
 hw/misc/pvpanic.c                        | 5 +++++
 include/hw/misc/pvpanic.h                | 2 +-
 include/standard-headers/linux/pvpanic.h | 1 +
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/docs/specs/pvpanic.rst b/docs/specs/pvpanic.rst
index f894bc19555f..796cc0348a38 100644
--- a/docs/specs/pvpanic.rst
+++ b/docs/specs/pvpanic.rst
@@ -29,6 +29,8 @@ bit 1
   a guest panic has happened and will be handled by the guest;
   the host should record it or report it, but should not affect
   the execution of the guest.
+bit 2
+  a guest shutdown has happened and should be processed by the host
 
 PCI Interface
 -------------
diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index a4982cc5928e..246f9ae4e992 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -40,6 +40,11 @@ static void handle_event(int event)
         qemu_system_guest_crashloaded(NULL);
         return;
     }
+
+    if (event & PVPANIC_SHUTDOWN) {
+        qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
+        return;
+    }
 }
 
 /* return supported events on read */
diff --git a/include/hw/misc/pvpanic.h b/include/hw/misc/pvpanic.h
index 198047dc86ff..fa76ad93d998 100644
--- a/include/hw/misc/pvpanic.h
+++ b/include/hw/misc/pvpanic.h
@@ -23,7 +23,7 @@
 #define TYPE_PVPANIC_PCI_DEVICE "pvpanic-pci"
 
 #define PVPANIC_IOPORT_PROP "ioport"
-#define PVPANIC_EVENTS (PVPANIC_PANICKED | PVPANIC_CRASH_LOADED)
+#define PVPANIC_EVENTS (PVPANIC_PANICKED | PVPANIC_CRASH_LOADED | PVPANIC_SHUTDOWN)
 
 /*
  * PVPanicState for any device type
diff --git a/include/standard-headers/linux/pvpanic.h b/include/standard-headers/linux/pvpanic.h
index 54b7485390d3..38e53ad45929 100644
--- a/include/standard-headers/linux/pvpanic.h
+++ b/include/standard-headers/linux/pvpanic.h
@@ -5,5 +5,6 @@
 
 #define PVPANIC_PANICKED	(1 << 0)
 #define PVPANIC_CRASH_LOADED	(1 << 1)
+#define PVPANIC_SHUTDOWN       	(1 << 2)
 
 #endif /* __PVPANIC_H__ */

-- 
2.43.0