linux-kernel - Re: [PATCH v3 2/3] MIPS: SiByte: Enable ZONE

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Date:   Wed, 14 Nov 2018 16:37:30 +0100
From:   Christoph Hellwig <hch@....de>
To:     "Maciej W. Rozycki" <macro@...ux-mips.org>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        Christoph Hellwig <hch@....de>, linux-mips@...ux-mips.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] MIPS: SiByte: Enable ZONE_DMA32 for LittleSur

On Tue, Nov 13, 2018 at 10:42:37PM +0000, Maciej W. Rozycki wrote:
> The LittleSur board is marked for high memory support and therefore 
> clearly must provide a way to have enough memory installed for some to 
> be present outside the low 4GiB physical address range.  With the memory 
> map of the BCM1250 SOC it has been built around it means over 1GiB of 
> actual DRAM, as only the first 1GiB is mapped in the low 4GiB physical 
> address range[1].
> 
> Complement commit cce335ae47e2 ("[MIPS] 64-bit Sibyte kernels need 
> DMA32.") then and also enable ZONE_DMA32 for LittleSur.

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>