On 12/5/18 6:48 AM, Nicolas Boichat wrote:
> IOMMUs using ARMv7 short-descriptor format require page tables
> (level 1 and 2) to be allocated within the first 4GB of RAM, even
> on 64-bit systems.
>
> For level 1/2 pages, ensure GFP_DMA32 is used if CONFIG_ZONE_DMA32
> is defined (e.g. on arm64
On Wed, Dec 05, 2018 at 06:43:08AM -0800, Christoph Hellwig wrote:
> On Wed, Dec 05, 2018 at 02:40:06PM +, Robin Murphy wrote:
> > 32-bit Arm doesn't have ZONE_DMA32, but has (or at least had at the time) a
> > 2GB ZONE_DMA. Whether we actually need that or not depends on how this all
> >
On Wed, Dec 05, 2018 at 02:40:06PM +, Robin Murphy wrote:
> 32-bit Arm doesn't have ZONE_DMA32, but has (or at least had at the time) a
> 2GB ZONE_DMA. Whether we actually need that or not depends on how this all
> interacts with LPAE and highmem, but I'm not sure of those details off-hand.
On 05/12/2018 13:54, Christoph Hellwig wrote:
On Wed, Dec 05, 2018 at 01:48:28PM +0800, Nicolas Boichat wrote:
IOMMUs using ARMv7 short-descriptor format require page tables
(level 1 and 2) to be allocated within the first 4GB of RAM, even
on 64-bit systems.
+#ifdef CONFIG_ZONE_DMA32
On Wed, Dec 05, 2018 at 01:48:28PM +0800, Nicolas Boichat wrote:
> IOMMUs using ARMv7 short-descriptor format require page tables
> (level 1 and 2) to be allocated within the first 4GB of RAM, even
> on 64-bit systems.
> +#ifdef CONFIG_ZONE_DMA32
> +#define ARM_V7S_TABLE_GFP_DMA GFP_DMA32
>
