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authorAlejandro Jimenez <alejandro.j.jimenez@oracle.com>2020-12-11 17:31:52 -0500
committerPaolo Bonzini <pbonzini@redhat.com>2020-12-15 12:51:58 -0500
commitc753e8e72548493d2a110c0482c4a987a733b033 (patch)
treec8830e44baac83400639be1e8ea4bfbd39d91f7b /qapi/run-state.json
parent2a5ad60b5406daca3658f2a6735318615ee6a116 (diff)
vl: Add option to avoid stopping VM upon guest panic
The current default action of pausing a guest after a panic event is received leaves the responsibility to resume guest execution to the management layer. The reasons for this behavior are discussed here: https://lore.kernel.org/qemu-devel/52148F88.5000509@redhat.com/ However, in instances like the case of older guests (Linux and Windows) using a pvpanic device but missing support for the PVPANIC_CRASHLOADED event, and Windows guests using the hv-crash enlightenment, it is desirable to allow the guests to continue running after sending a PVPANIC_PANICKED event. This allows such guests to proceed to capture a crash dump and automatically reboot without intervention of a management layer. Add an option to avoid stopping a VM after a panic event is received, by passing: -action panic=none in the command line arguments, or during runtime by using an upcoming QMP command. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com> Message-Id: <1607705564-26264-3-git-send-email-alejandro.j.jimenez@oracle.com> [Do not fix panic action in the variable, instead modify -no-shutdown. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'qapi/run-state.json')
-rw-r--r--qapi/run-state.json16
1 files changed, 16 insertions, 0 deletions
diff --git a/qapi/run-state.json b/qapi/run-state.json
index 25e82d1be1..1f3b329f05 100644
--- a/qapi/run-state.json
+++ b/qapi/run-state.json
@@ -354,6 +354,18 @@
'data': [ 'poweroff', 'pause' ] }
##
+# @PanicAction:
+#
+# @none: Continue VM execution
+#
+# @pause: Pause the VM
+#
+# Since: 6.0
+##
+{ 'enum': 'PanicAction',
+ 'data': [ 'poweroff', 'pause', 'none' ] }
+
+##
# @watchdog-set-action:
#
# Set watchdog action
@@ -372,6 +384,8 @@
#
# @shutdown: @ShutdownAction action taken on guest shutdown.
#
+# @panic: @PanicAction action taken on guest panic.
+#
# @watchdog: @WatchdogAction action taken when watchdog timer expires .
#
# Returns: Nothing on success.
@@ -383,12 +397,14 @@
# -> { "execute": "set-action",
# "arguments": { "reboot": "shutdown",
# "shutdown" : "pause",
+# "panic": "pause",
# "watchdog": "inject-nmi" } }
# <- { "return": {} }
##
{ 'command': 'set-action',
'data': { '*reboot': 'RebootAction',
'*shutdown': 'ShutdownAction',
+ '*panic': 'PanicAction',
'*watchdog': 'WatchdogAction' },
'allow-preconfig': true }