ascend inclusion
category: feature
bugzilla: NA
CVE: NA

--------------------------------

The softlockup and hardlockup detector only check the status
of the cpu which it resides. If certain cpu core suspends,
they are both not works. There is no any valid log but the
cpu already abnormal and brings a lot of problems of system.
To detect this case, we add the corelockup detector.

First we use whether cpu core can responds to nmi as a sectence
to determine if it is suspended. Then things is simple. Per cpu
core maintains it's nmi interrupt counts and detector the
nmi_counts of next cpu core. If the nmi interrupt counts not
changed any more which means it can't respond nmi normally, we
regard it as suspend.

To ensure robustness, only consecutive lost nmi more than two
times then trigger the warn.

The detection chain is as following:
cpu0->cpu1->...->cpuN->cpu0
Signed-off-by: NDong Kai <dongkai11@huawei.com>
Reviewed-by: NKuohai Xu <xukuohai@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>