Commit f09f6d19 authored by Donald Dutile's avatar Donald Dutile Committed by Jeremy Fitzhardinge
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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: default avatarDonald Dutile <ddutile@redhat.com>
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
parent c06ee78d

arch/x86/xen/enlighten.c

+20 −0
Original line number Diff line number Diff line
@@ -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,

arch/x86/xen/setup.c

+2 −0
Original line number Diff line number Diff line
@@ -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);

arch/x86/xen/xen-ops.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */