linux-kernel - Re: [PATCH kernel] powerpc/powernv/ioda2: Add 256M IOMMU page size to the default POWER8 case

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Message-ID: <20180712151259.44f2f6ee@aik.ozlabs.ibm.com>
Date:   Thu, 12 Jul 2018 15:12:59 +1000
From:   Alexey Kardashevskiy <aik@...abs.ru>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     Russell Currey <ruscur@...sell.cc>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH kernel] powerpc/powernv/ioda2: Add 256M IOMMU page size
 to the default POWER8 case

On Mon,  2 Jul 2018 17:42:05 +1000
Alexey Kardashevskiy <aik@...abs.ru> wrote:

> The sketchy bypass uses 256M pages so add this page size as well.
> 
> This should cause no behavioral change but will be used later.
> 
> Fixes: 477afd6ea6 "powerpc/ioda: Use ibm,supported-tce-sizes for IOMMU page size mask"
> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>
> ---
>  arch/powerpc/platforms/powernv/pci-ioda.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
> index 5bd0eb6..557c11d 100644
> --- a/arch/powerpc/platforms/powernv/pci-ioda.c
> +++ b/arch/powerpc/platforms/powernv/pci-ioda.c
> @@ -2925,7 +2925,7 @@ static unsigned long pnv_ioda_parse_tce_sizes(struct pnv_phb *phb)
>  		/* Add 16M for POWER8 by default */
>  		if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
>  				!cpu_has_feature(CPU_FTR_ARCH_300))
> -			mask |= SZ_16M;
> +			mask |= SZ_16M | SZ_256M;


Ping?

>  		return mask;
>  	}
>  
> -- 
> 2.11.0
> 



--
Alexey