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authorDonald Dutile <ddutile@redhat.com>2010-07-15 14:56:49 -0400
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2010-08-04 14:47:31 -0700
commitf09f6d194d85043e0eb105a577e7ad6d8170ab66 (patch)
tree1ac8db53e42a15f9f28f20c941d75bb8b94fd385 /arch/x86
parentc06ee78d73fd24e8d8a65f16380f6a0551107e1b (diff)
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/xen/enlighten.c20
-rw-r--r--arch/x86/xen/setup.c2
-rw-r--r--arch/x86/xen/xen-ops.h2
3 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 90a3e802676..d99522e8f03 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1040,6 +1040,26 @@ static void xen_crash_shutdown(struct pt_regs *regs)
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 9deb6bab6c7..328b0030542 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -226,6 +226,8 @@ void __init xen_arch_setup(void)
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 f9153a300bc..00d59d608ed 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -101,4 +101,6 @@ void xen_sysret32(void);
void xen_sysret64(void);
void xen_adjust_exception_frame(void);
+extern int xen_panic_handler_init(void);
+
#endif /* XEN_OPS_H */