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Subject[PATCH] xen: initialize xen panic handler for PVHVM
Date
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 aware 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 pvm, this patch is
necessary for pvhvm.

Signed-off-by: Vaughan Cao <vaughan.cao@oracle.com>
---
arch/x86/xen/enlighten.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 4aec5ed..53e5726 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1713,6 +1713,8 @@ static void __init xen_hvm_guest_init(void)

xen_hvm_init_shared_info();

+ xen_panic_handler_init();
+
if (xen_feature(XENFEAT_hvm_callback_vector))
xen_have_vector_callback = 1;
xen_hvm_smp_init();
--
1.7.11.7


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