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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>
This commit is contained in:
Donald Dutile 2010-07-15 14:56:49 -04:00 committed by Jeremy Fitzhardinge
parent c06ee78d73
commit f09f6d194d
3 changed files with 24 additions and 0 deletions
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20
arch/x86/xen/enlighten.c
View File

@ -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,

2
arch/x86/xen/setup.c
View File

@ -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);

2
arch/x86/xen/xen-ops.h
View File

@ -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 */