linux-kernel - Re: [PATCH v5 08/10] iommu/mediatek: Extend protect pa alignment value

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Date:   Mon, 29 Jun 2020 12:17:18 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Chao Hao <chao.hao@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Yong Wu <yong.wu@...iatek.com>, Evan Green <evgreen@...omium.org>,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, wsd_upstream@...iatek.com,
        FY Yang <fy.yang@...iatek.com>
Subject: Re: [PATCH v5 08/10] iommu/mediatek: Extend protect pa alignment
 value



On 29/06/2020 09:13, Chao Hao wrote:
> Starting with mt6779, iommu needs to extend to 256 bytes from 128
> bytes which can send the max number of data for memory protection
> pa alignment. So we can use a separate patch to modify it.
> 
> Suggested-by: Matthias Brugger <matthias.bgg@...il.com>
> Signed-off-by: Chao Hao <chao.hao@...iatek.com>

Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>

> ---
>  drivers/iommu/mtk_iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 92316c4175a9..8299a3299090 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -98,7 +98,7 @@
>  #define F_MMU_INT_ID_LARB_ID(a)			(((a) >> 7) & 0x7)
>  #define F_MMU_INT_ID_PORT_ID(a)			(((a) >> 2) & 0x1f)
>  
> -#define MTK_PROTECT_PA_ALIGN			128
> +#define MTK_PROTECT_PA_ALIGN			256
>  
>  /*
>   * Get the local arbiter ID and the portid within the larb arbiter
>