Phytium/S2500: kdump: Avoid vmcore saving failure across multi-socket

phytium inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I41AUQ



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On phytium S2500 multi-socket server, for example 2-socket(2P), there are
socekt0 and socket1 on the server:
If storage device(like SAS controller and disks to save vmcore into) is
installed on socket1 and second kernel brings up 2 CPUs both on socket0 with
nr_cpus=2, then vmcore will fail to be saved into the disk as interrupts like
SPI and LPI(except SGI) can't communicate across cpu sockets in this server
platform.

To avoid this issue, Bypass other non-cpu0 to ensure that each cpu0 on each
socket can boot up and handle interrupt when booting the second kernel.

Signed-off-by: Mao HongBo <maohongbo@phytium.com.cn>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>