Re: [PATCH] iommu/mediatek: Fix share pgtable for iova over 4GB

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

Il 19/08/23 10:14, Yong Wu ha scritto:
> In mt8192/mt8186, there is only one MM IOMMU that supports 16GB iova
> space, which is shared by display, vcodec and camera. These two SoC use
> one pgtable and have not the flag SHARE_PGTABLE, we should also keep
> share pgtable for this case.
> 
> In mtk_iommu_domain_finalise, MM IOMMU always share pgtable, thus remove
> the flag SHARE_PGTABLE checking. Infra IOMMU always uses independent
> pgtable.
> 
> Fixes: cf69ef46dbd9 ("iommu/mediatek: Fix two IOMMU share pagetable issue")
> Reported-by: Laura Nao <laura.nao@collabora.com>
> Closes: https://lore.kernel.org/linux-iommu/20230818154156.314742-1-laura.nao@collabora.com/
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> Base on next-20230818.
> ---
>   drivers/iommu/mtk_iommu.c | 9 ++++-----
>   1 file changed, 4 insertions(+), 5 deletions(-)

Gentle ping for an important fix.

Thanks,
Angelo