maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7R4EN
CVE: NA
Reference: https://www.spinics.net/lists/arm-kernel/msg851005.html

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Add a new API kgdb_smp_call_nmi_hook() to expose default CPUs roundup
mechanism to a particular archichecture as a runtime fallback if it
detects to not support NMI roundup.

Currently such an architecture example is arm64 supporting pseudo NMIs
feature which is only available on platforms which have support for GICv3
or later version.
Signed-off-by: NSumit Garg <sumit.garg@linaro.org>
Signed-off-by: NWei Li <liwei391@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: NRuan Jinjie <ruanjinjie@huawei.com>