Re: [PATCH 2/7 v2] powerpc/dma-mapping: override dma_get_page_shift

From: Benjamin Herrenschmidt
Date: Tue Oct 27 2015 - 22:21:40 EST

On Tue, 2015-10-27 at 18:54 -0700, Nishanth Aravamudan wrote:
> In "bypass" mode, what TCE size is used? Is it guaranteed to be 4K?

None :-) The TCEs are completely bypassed. You get a N:M linear mapping
of all memory starting at 1<<59 PCI side.

> Seems like this would be a different platform implentation I'd put in
> for 'powernv', is that right?
> My apologies for missing that, and thank you for the review!


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