Re: [PATCH v4 0/6] Define EINVAL as device/domain incompatibility

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On Wed, Sep 21, 2022 at 01:22:31AM -0700, Nicolin Chen wrote:
> This series is to replace the previous EMEDIUMTYPE patch in a VFIO series:
> https://lore.kernel.org/kvm/Yxnt9uQTmbqul5lf@xxxxxxxxxx/
> 
> The purpose is to regulate all existing ->attach_dev callback functions to
> use EINVAL exclusively for an incompatibility error between a device and a
> domain. This allows VFIO and IOMMUFD to detect such a soft error, and then
> try a different domain with the same device.
[...]
>  drivers/iommu/amd/iommu.c                   | 12 +----
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 11 +---
>  drivers/iommu/arm/arm-smmu/arm-smmu.c       |  3 --
>  drivers/iommu/arm/arm-smmu/qcom_iommu.c     |  7 +--
>  drivers/iommu/fsl_pamu.c                    |  2 +-
>  drivers/iommu/fsl_pamu_domain.c             |  4 +-
>  drivers/iommu/intel/iommu.c                 | 10 ++--
>  drivers/iommu/intel/pasid.c                 |  6 ++-
>  drivers/iommu/iommu.c                       | 22 ++++++++
>  drivers/iommu/ipmmu-vmsa.c                  |  2 -
>  drivers/iommu/msm_iommu.c                   | 59 +++++++++++----------
>  drivers/iommu/mtk_iommu.c                   |  4 +-
>  drivers/iommu/omap-iommu.c                  |  6 +--
>  drivers/iommu/sprd-iommu.c                  |  4 +-
>  drivers/iommu/tegra-gart.c                  |  2 +-
>  drivers/iommu/virtio-iommu.c                |  7 ++-

For virtio-iommu:

Reviewed-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>

>  include/linux/iommu.h                       | 12 +++++
>  17 files changed, 90 insertions(+), 83 deletions(-)
> 
> -- 
> 2.17.1
> 
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