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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <9640a2ff6ce0c20d603c16ba7e8b5238d206bf26.camel@russell.cc>
Date:   Thu, 12 Jul 2018 17:21:49 +1000
From:   Russell Currey <ruscur@...sell.cc>
To:     Alexey Kardashevskiy <aik@...abs.ru>, linuxppc-dev@...ts.ozlabs.org
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, 2018-07-02 at 17:42 +1000, Alexey Kardashevskiy 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>

Reviewed-by: Russell Currey <ruscur@...sell.cc>

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