On Tue, Mar 21, 2017 at 04:30:55PM +0000, Deucher, Alexander wrote: > > I am preparing a debug-patch that disables ATS for these GPUs so someone > > with such a chip can test it. > > Thanks Joerg. Here is a debug patch, using the hard hammer of disabling the use of ATS completly in the AMD IOMMU driver. If it fixes the issue I am going to write a more upstreamable version. But for now, please test if this fixes the issue. Thanks, Joerg diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 98940d1..f019aa6 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -467,7 +467,7 @@ static int iommu_init_device(struct device *dev) struct amd_iommu *iommu; iommu = amd_iommu_rlookup_table[dev_data->devid]; - dev_data->iommu_v2 = iommu->is_iommu_v2; + dev_data->iommu_v2 = false; } dev->archdata.iommu = dev_data; diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 6130278..41d0e64 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -171,7 +171,7 @@ int amd_iommus_present; /* IOMMUs have a non-present cache? */ bool amd_iommu_np_cache __read_mostly; -bool amd_iommu_iotlb_sup __read_mostly = true; +bool amd_iommu_iotlb_sup __read_mostly = false; u32 amd_iommu_max_pasid __read_mostly = ~0;
