Patch: Fix lpae on exynos5

[Peter Robinson]

John,

Is there any upstream references to this? Has this been tested against
the Fedora LPAE kernel config and are there any changes needed for
that, oh and which version of the Fedora kernel?

Peter

On Wed, Oct 23, 2013 at 3:40 PM, John Dulaney
<jdulaney at fedoraproject.org> wrote:
> This patch fixes lpae on exynos5 arm processors.  LPAE is needed for
> virt on arm processors.
>
> --- arch/arm/mach-exynos/mach-exynos5-dt.c    2013-09-02 16:46:10.000000000 -0400
> +++ arch/arm/mach-exynos/mach-exynos5-dt.c    2013-10-23 10:35:37.891255087 -0400
> @@ -14,7 +14,7 @@
>  #include <linux/memblock.h>
>  #include <linux/io.h>
>  #include <linux/clocksource.h>
> -
> +#include <linux/dma-mapping.h>
>  #include <asm/mach/arch.h>
>  #include <mach/regs-pmu.h>
>
> @@ -23,6 +23,26 @@
>
>  #include "common.h"
>
> +static u64 dma_mask64 = DMA_BIT_MASK(64);
> +
> +static int exynos5250_platform_notifier(struct notifier_block *nb,
> +          unsigned long event, void *__dev)
> +{
> +  struct device *dev = __dev;
> +
> +  if (event != BUS_NOTIFY_ADD_DEVICE)
> +    return NOTIFY_DONE;
> +
> +  dev->dma_mask = &dma_mask64;
> +  dev->coherent_dma_mask = DMA_BIT_MASK(64);
> +
> +  return NOTIFY_OK;
> +}
> +
> +static struct notifier_block exynos5250_platform_nb = {
> +  .notifier_call = exynos5250_platform_notifier,
> +};
> +
>  static void __init exynos5_dt_machine_init(void)
>  {
>      struct device_node *i2c_np;
> @@ -46,6 +66,9 @@
>              }
>          }
>      }
> +
> +    if (of_machine_is_compatible("samsung,exynos5250"))
> +       bus_register_notifier(&platform_bus_type, &exynos5250_platform_nb);
>
>      of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
>  }
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