[PATCH V3]: MIPS: loongson64: fix booting failure

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To: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Subject: [PATCH V3]: MIPS: loongson64: fix booting failure
From: Huang Pei <huangpei@xxxxxxxxxxx>
Date: Thu, 18 Jan 2024 20:39:27 +0800
Cc: Bibo Mao <maobibo@xxxxxxxxxxx>, linux-mips@xxxxxxxxxxxxxxx, Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>, Paul Burton <paulburton@xxxxxxxxxx>, Li Xuefeng <lixuefeng@xxxxxxxxxxx>, Yang Tiezhu <yangtiezhu@xxxxxxxxxxx>, Gao Juxin <gaojuxin@xxxxxxxxxxx>, Huacai Chen <chenhuacai@xxxxxxxxxxx>
In-reply-to: <ZZ29Wr9yfAcqGxrN@alpha.franken.de>
References: <ZZ29Wr9yfAcqGxrN@alpha.franken.de>

Patch 1:

Just reserve exception vector ONLY ONCE.

Patch 2:

workaround the boot failure. See [1] for the real fix 

[1]: https://lore.kernel.org/all/Zad3ynuuu8S-51eI@xxxxxxxxxx

Follow-Ups:
- [PATCH 1/2] MIPS: reserve exception vector space ONLY ONCE
  - From: Huang Pei
- [PATCH 2/2] MIPS: loongson64: set nid for reserved memblock region
  - From: Huang Pei

References:
- Re: [PATCH] MIPS: loongson64: fix boot failure
  - From: Thomas Bogendoerfer

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