Xen: register panic notifier to take crashes of xen guests on panic
Register a panic notifier so that when the guest crashes it can shut
down the domain and indicate it was a crash to the host.
Signed-off-by: Donald Dutile <ddutile@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 90a3e80..d99522e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1040,6 +1040,26 @@
xen_reboot(SHUTDOWN_crash);
}
+static int
+xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+ struct sched_shutdown r = { .reason = SHUTDOWN_crash};
+
+ if (HYPERVISOR_sched_op(SCHEDOP_shutdown, &r))
+ BUG();
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block xen_panic_block = {
+ .notifier_call= xen_panic_event,
+};
+
+int xen_panic_handler_init(void)
+{
+ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+ return 0;
+}
+
static const struct machine_ops __initdata xen_machine_ops = {
.restart = xen_restart,
.halt = xen_machine_halt,
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 9deb6ba..328b003 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -226,6 +226,8 @@
struct physdev_set_iopl set_iopl;
int rc;
+ xen_panic_handler_init();
+
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index f9153a3..00d59d6 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -101,4 +101,6 @@
void xen_sysret64(void);
void xen_adjust_exception_frame(void);
+extern int xen_panic_handler_init(void);
+
#endif /* XEN_OPS_H */
