xen/pvhvm: Initialize xen panic handler for PVHVM guests
kernel use callback linked in panic_notifier_list to notice others when panic happens. NORET_TYPE void panic(const char * fmt, ...){ ... atomic_notifier_call_chain(&panic_notifier_list, 0, buf); } When Xen becomes aware of this, it will call xen_reboot(SHUTDOWN_crash) to send out an event with reason code - SHUTDOWN_crash. xen_panic_handler_init() is defined to register on panic_notifier_list but we only call it in xen_arch_setup which only be called by PV, this patch is necessary for PVHVM. Without this patch, setting 'on_crash=coredump-restart' in PVHVM guest config file won't lead a vmcore to be generate when the guest panics. It can be reproduced with 'echo c > /proc/sysrq-trigger'. Signed-off-by:Vaughan Cao <vaughan.cao@oracle.com> Signed-off-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by:
Joe Jin <joe.jin@oracle.com>
parent
ee072640
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