Re: [PATCH] MIPS: mm: tlb-r4k: Uniquify TLB entries on init

["Jiaxun Yang" <jiaxun.yang@flygoat.com>]

在2025年6月5日周四 上午11:02，Jiaxun Yang写道：
> Hardware or bootloader will initialize TLB entries to any value, which
> may collide with kernel's UNIQUE_ENTRYHI value. On MIPS microAptiv/M5150
> family of cores this will trigger machine check exception and cause boot
> failure. On M5150 simulation this could happen 7 times out of 1000 boots.
>
> Replace local_flush_tlb_all() with r4k_tlb_uniquify() which probes each
> TLB ENTRIHI unique value for collisions before it's written and overwrites
> any conflicting entries with safe values before initializing the kernel's
> UNIQUE_ENTRYHI pattern.

I just realised it might be easier to cycling ASID instead of address in
Entry Hi.

Will come try a v2.

Thanks
Jiaxun

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-- 
- Jiaxun