Re: [PATCH v5] iommu/mediatek: check 4GB mode by reading infracfg

[Joerg Roedel]

On Mon, Aug 31, 2020 at 06:56:39PM +0800, Miles Chen wrote:
> In previous discussion [1] and [2], we found that it is risky to
> use max_pfn or totalram_pages to tell if 4GB mode is enabled.
> 
> Check 4GB mode by reading infracfg register, remove the usage
> of the un-exported symbol max_pfn.
> 
> This is a step towards building mtk_iommu as a kernel module.
> 
> [1] https://lore.kernel.org/lkml/20200603161132.2441-1-miles.chen@xxxxxxxxxxxx/
> [2] https://lore.kernel.org/lkml/20200604080120.2628-1-miles.chen@xxxxxxxxxxxx/
> [3] https://lore.kernel.org/lkml/20200715205120.GA778876@bogus/
> 
> Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
> Cc: David Hildenbrand <david@xxxxxxxxxx>
> Cc: Yong Wu <yong.wu@xxxxxxxxxxxx>
> Cc: Yingjoe Chen <yingjoe.chen@xxxxxxxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>
> Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
> Signed-off-by: Miles Chen <miles.chen@xxxxxxxxxxxx>

You forgot to add the tags here from v4, at least Matthias' Reviewed-by
is missing. Please add the missing tags and resend.


	Joerg