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Re: [PATCH] iommu/amd: Allow non-ATS devices in IOMMUv2 domains

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On Thu, Jul 30, 2015 at 1:05 PM, Joerg Roedel <joro@8bytes.org> wrote:
> From: Joerg Roedel <jroedel@suse.de>
>
> With the grouping of multi-function devices a non-ATS
> capable device might also end up in the same domain as an
> IOMMUv2 capable device.
> So handle this situation gracefully and don't consider it a
> bug anymore.
>
> Signed-off-by: Joerg Roedel <jroedel@suse.de>
> ---
>  drivers/iommu/amd_iommu.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
> index fa9508b..658ee39 100644
> --- a/drivers/iommu/amd_iommu.c
> +++ b/drivers/iommu/amd_iommu.c
> @@ -3318,7 +3318,12 @@ static int __flush_pasid(struct protection_domain *domain, int pasid,
>                 struct amd_iommu *iommu;
>                 int qdep;
>
> -               BUG_ON(!dev_data->ats.enabled);
> +               /*
> +                  There might be non-IOMMUv2 capable devices in an IOMMUv2
> +                * domain.
> +                */
> +               if (!dev_data->ats.enabled)
> +                       continue;
>
>                 qdep  = dev_data->ats.qdep;
>                 iommu = amd_iommu_rlookup_table[dev_data->devid];
> --
> 1.9.1
>
This series, with the additional patch is:
Tested-by: "Oded Gabbay <oded.gabbay@gmail.com>"
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[PATCH] iommu/amd: Allow non-ATS devices in IOMMUv2 domains Joerg Roedel <joro@8bytes.org> - 2015-07-30 12:10 +0200
  Re: [PATCH] iommu/amd: Allow non-ATS devices in IOMMUv2 domains Oded Gabbay <oded.gabbay@gmail.com> - 2015-07-30 12:10 +0200
  Re: [PATCH] iommu/amd: Allow non-ATS devices in IOMMUv2 domains Oded Gabbay <oded.gabbay@gmail.com> - 2015-07-30 12:20 +0200

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