[PATCH v2 0/4] PCI, iommu: Factor 'untrusted' check for ATS enablement

[Joerg Roedel]

On Wed, May 20, 2020 at 05:21:59PM +0200, Jean-Philippe Brucker wrote:
> IOMMU drivers currently check themselves if a device is untrusted
> (plugged into an external-facing port) before enabling ATS. Move the
> check to drivers/pci. The only functional change should be to the AMD
> IOMMU driver. With this change all IOMMU drivers block 'Translated' PCIe
> transactions and Translation Requests from untrusted devices.
> 
> Since v1 [1] I added tags, addressed comments on patches 1 and 3, and
> fixed a regression in patch 3.
> 
> [1] https://lore.kernel.org/linux-iommu/20200515104359.1178606-1-jean-philippe@linaro.org/
> 
> Jean-Philippe Brucker (4):
>   PCI/ATS: Only enable ATS for trusted devices
>   iommu/amd: Use pci_ats_supported()
>   iommu/arm-smmu-v3: Use pci_ats_supported()
>   iommu/vt-d: Use pci_ats_supported()
> 
>  include/linux/pci-ats.h     |  3 +++
>  drivers/iommu/amd_iommu.c   | 12 ++++--------
>  drivers/iommu/arm-smmu-v3.c | 20 +++++++-------------
>  drivers/iommu/intel-iommu.c |  9 +++------
>  drivers/pci/ats.c           | 18 +++++++++++++++++-
>  5 files changed, 34 insertions(+), 28 deletions(-)

Applied, thanks.