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misc: pvpanic: add crash loaded event

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Some users prefer kdump tools to generate guest kernel dumpfile,
at the same time, need a out-of-band kernel panic event.

Currently if booting guest kernel with 'crash_kexec_post_notifiers',
QEMU will receive PVPANIC_PANICKED event and stop VM. If booting
guest kernel without 'crash_kexec_post_notifiers', guest will not
call notifier chain.

Add PVPANIC_CRASH_LOADED bit for pvpanic event, it means that guest
kernel actually hit a kernel panic, but the guest kernel wants to
handle by itself.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Link: https://lore.kernel.org/r/20200102023513.318836-3-pizhenwei@bytedance.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
zhenwei pi
2020-01-02 10:35:13 +08:00
committed by Greg Kroah-Hartman
parent e0b9a42735
commit 191941692a
2 changed files with 9 additions and 1 deletions
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1
include/uapi/misc/pvpanic.h
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@@ -4,5 +4,6 @@
#define __PVPANIC_H__
#define PVPANIC_PANICKED (1 << 0)
#define PVPANIC_CRASH_LOADED (1 << 1)
#endif /* __PVPANIC_H__ */