Re: [Xen-devel] arm64: dma_to_phys/phys_to_dma need to be properly implemented

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

indeed, this seems to be the case

So, in that mail thread we have the following statement:

"However, if that's not the case in any of the drivers, it
would lead to memory corruptions." with respect to get_sgtable

and pfn != mfn.

So, do you guys think I'll have to patch the offending driver?
Any other solution/workaround here?

Thank you,
Oleksandr

On 03/28/2017 03:40 PM, Andrii Anisov wrote:
> Hello,
>
> I guess Oleksandr stepped into the issue described here 
> https://lists.xenproject.org/archives/html/xen-devel/2017-01/msg03454.html 
> .
> He uses an old version of the patch but effectively calls 
> __generic_dma_ops(dev)->get_sgtable() with foreign pages so faced 
> troubles.
> Sincerely,
> Andrii Anisov

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