Re: [PATCH] MIPS: Make sure ebase address is in KSEG0

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

于 2019年11月23日 GMT+08:00 下午1:08:38, Jiaxun Yang <jiaxun.yang@flygoat.com> 写到:
>
>
>于 2019年11月23日 GMT+08:00 上午2:47:31, Paul Burton <paulburton@kernel.org>
>写到:
>>Hi Huacai,
>>
>>On Thu, Nov 21, 2019 at 07:30:20PM +0800, Huacai Chen wrote:
>>> Dynamically allocated ebase address above 0x20000000 can be
>triggered
>>> by some special physical memory layout, or just by a "big kernel +
>>big
>>> initrd + big swiotlb" configuration.
>>> 
>>> For MIPS32, ebase address above 0x20000000 is unusable, for MIPS64
>it
>>> is usable but this case is warned. However, this warning is useless
>>> because it is unfixable in a specific system configuration. So we
>>just
>>> use CKSEG0 as a fallback.
>>
>>I'd prefer that we don't assume there's memory at physical address
>zero
>>- that property doesn't hold for all systems.
>>
>>How about the change I suggested previously over here:
>>
>>https://lore.kernel.org/linux-mips/20191108191149.bbq3h4xp4famsh2n@lantea.localdomain/
>>
>>Would that work for you?
>
>Hi Paul
>
>Our problem is, sometimes the ebase from firmware is totally a random
>address, 
>even not inside the memory region. I'd prefer ignore address if it's
>not valid since the warning here can't deal with it.

I'm sorry. I was wrong. Please ignore the noise.

Thanks

>
>Thanks.
>>
>>Thanks,
>>    Paul
>>

-- 
Jiaxun Yang