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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>
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3 changed files with 24 additions and 0 deletions
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@ -1040,6 +1040,26 @@ static void xen_crash_shutdown(struct pt_regs *regs)
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xen_reboot(SHUTDOWN_crash);
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xen_reboot(SHUTDOWN_crash);
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}
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}
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static int
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xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
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{
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struct sched_shutdown r = { .reason = SHUTDOWN_crash};
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if (HYPERVISOR_sched_op(SCHEDOP_shutdown, &r))
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BUG();
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return NOTIFY_DONE;
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}
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static struct notifier_block xen_panic_block = {
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.notifier_call= xen_panic_event,
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};
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int xen_panic_handler_init(void)
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{
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atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
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return 0;
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}
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static const struct machine_ops __initdata xen_machine_ops = {
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static const struct machine_ops __initdata xen_machine_ops = {
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.restart = xen_restart,
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.restart = xen_restart,
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.halt = xen_machine_halt,
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.halt = xen_machine_halt,
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@ -226,6 +226,8 @@ void __init xen_arch_setup(void)
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struct physdev_set_iopl set_iopl;
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struct physdev_set_iopl set_iopl;
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int rc;
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int rc;
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xen_panic_handler_init();
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HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
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HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
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HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
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HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables);
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@ -101,4 +101,6 @@ void xen_sysret32(void);
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void xen_sysret64(void);
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void xen_sysret64(void);
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void xen_adjust_exception_frame(void);
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void xen_adjust_exception_frame(void);
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extern int xen_panic_handler_init(void);
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#endif /* XEN_OPS_H */
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#endif /* XEN_OPS_H */
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