hw/misc/pvpanic: add support for normal shutdowns

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.

Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Message-Id: <20240527-pvpanic-shutdown-v8-5-5a28ec02558b@t-8ch.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 4b2307d2c2ee4228a60419adfdf6c4b6666fd63c..3b893340c05d9be1f223bf04d779cb2bb6a54ce4 100644 (file)
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -41,6 +41,11 @@ static void handle_event(int event)
         qemu_system_guest_crashloaded(NULL);
         return;
     }
+
+    if (event & PVPANIC_SHUTDOWN) {
+        qemu_system_guest_pvshutdown();
+        return;
+    }
 }
 
 /* return supported events on read */

diff --git a/include/hw/misc/pvpanic.h b/include/hw/misc/pvpanic.h
index 1e5b20e4ed0fba7f3f6b49c1e7c616c4af1bcb5e..9a71a5ad0d7dd3b9f52d8e16159435139b438cec 100644 (file)
--- a/include/hw/misc/pvpanic.h
+++ b/include/hw/misc/pvpanic.h
@@ -20,7 +20,9 @@
 
 #include "standard-headers/misc/pvpanic.h"
 
-#define PVPANIC_EVENTS (PVPANIC_PANICKED | PVPANIC_CRASH_LOADED)
+#define PVPANIC_EVENTS (PVPANIC_PANICKED | \
+                        PVPANIC_CRASH_LOADED | \
+                        PVPANIC_SHUTDOWN)
 
 #define TYPE_PVPANIC_ISA_DEVICE "pvpanic"
 #define TYPE_PVPANIC_PCI_DEVICE "pvpanic-pci"

diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h
index 0117d243c4ed7dfa6a2ff6a9fb631a18447fbd5c..e210a37abf0f10de0eade82d8442b2e05f2a16cb 100644 (file)
--- a/include/sysemu/runstate.h
+++ b/include/sysemu/runstate.h
@@ -104,6 +104,7 @@ void qemu_system_killed(int signal, pid_t pid);
 void qemu_system_reset(ShutdownCause reason);
 void qemu_system_guest_panicked(GuestPanicInformation *info);
 void qemu_system_guest_crashloaded(GuestPanicInformation *info);
+void qemu_system_guest_pvshutdown(void);
 bool qemu_system_dump_in_progress(void);
 
 #endif

diff --git a/system/runstate.c b/system/runstate.c
index ec32e270cb4969d735601181de5f45ab7ff95f8c..fc49fd3e6106ee255b2fdcd9503ecd23f7177cff 100644 (file)
--- a/system/runstate.c
+++ b/system/runstate.c
@@ -584,6 +584,11 @@ void qemu_system_guest_crashloaded(GuestPanicInformation *info)
     qapi_free_GuestPanicInformation(info);
 }
 
+void qemu_system_guest_pvshutdown(void)
+{
+    qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
+}
+
 void qemu_system_reset_request(ShutdownCause reason)
 {
     if (reboot_action == REBOOT_ACTION_SHUTDOWN &&