BMC/Intel-BMC/linux.git/drivers/iommu, branch dev

iommu/amd: Allow non-ATS devices in IOMMUv2 domains

2015-07-31T13:15:41+00:00

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. Tested-by: Oded Gabbay Signed-off-by: Joerg Roedel

iommu/amd: Set global dma_ops if swiotlb is disabled

2015-07-30T08:28:48+00:00

Some AMD systems also have non-PCI devices which can do DMA. Those can't be handled by the AMD IOMMU, as the hardware can only handle PCI. These devices would end up with no dma_ops, as neither the per-device nor the global dma_ops will get set. SWIOTLB provides global dma_ops when it is active, so make sure there are global dma_ops too when swiotlb is disabled. Signed-off-by: Joerg Roedel

iommu/amd: Use swiotlb in passthrough mode

2015-07-30T08:28:48+00:00

In passthrough mode (iommu=pt) all devices are identity mapped. If a device does not support 64bit DMA it might still need remapping. Make sure swiotlb is initialized to provide this remapping. Signed-off-by: Joerg Roedel

iommu/amd: Allow non-IOMMUv2 devices in IOMMUv2 domains

2015-07-30T08:28:48+00:00

Since devices with IOMMUv2 functionality might be in the same group as devices without it, allow those devices in IOMMUv2 domains too. Otherwise attaching the group with the IOMMUv2 device to the domain will fail. Signed-off-by: Joerg Roedel

iommu/amd: Use iommu core for passthrough mode

2015-07-30T08:28:48+00:00

Remove the AMD IOMMU driver implementation for passthrough mode and rely on the new iommu core features for that. Signed-off-by: Joerg Roedel

iommu/amd: Use iommu_attach_group()

2015-07-30T08:28:48+00:00

Since the conversion to default domains the iommu_attach_device function only works for devices with their own group. But this isn't always true for current IOMMUv2 capable devices, so use iommu_attach_group instead. Signed-off-by: Joerg Roedel

iommu/vt-d: Fix VM domain ID leak

2015-07-23T12:17:39+00:00

This continues the attempt to fix commit fb170fb4c548 ("iommu/vt-d: Introduce helper functions to make code symmetric for readability"). The previous attempt in commit 71684406905f ("iommu/vt-d: Detach domain *only* from attached iommus") overlooked the fact that dmar_domain.iommu_bmp gets cleared for VM domains when devices are detached: intel_iommu_detach_device domain_remove_one_dev_info domain_detach_iommu The domain is detached from the iommu, but the iommu is still attached to the domain, for whatever reason. Thus when we get to domain_exit(), we can't rely on iommu_bmp for VM domains to find the active iommus, we must check them all. Without that, the corresponding bit in intel_iommu.domain_ids doesn't get cleared and repeated VM domain creation and destruction will run out of domain IDs. Meanwhile we still can't call iommu_detach_domain() on arbitrary non-VM domains or we risk clearing in-use domain IDs, as 71684406905f attempted to address. It's tempting to modify iommu_detach_domain() to test the domain iommu_bmp, but the call ordering from domain_remove_one_dev_info() prevents it being able to work as fb170fb4c548 seems to have intended. Caching of unused VM domains on the iommu object seems to be the root of the problem, but this code is far too fragile for that kind of rework to be proposed for stable, so we simply revert this chunk to its state prior to fb170fb4c548. Fixes: fb170fb4c548 ("iommu/vt-d: Introduce helper functions to make code symmetric for readability") Fixes: 71684406905f ("iommu/vt-d: Detach domain *only* from attached iommus") Signed-off-by: Alex Williamson Cc: Jiang Liu Cc: stable@vger.kernel.org # v3.17+ Signed-off-by: Joerg Roedel

iommu/arm-smmu: Skip the execution of CMD_PREFETCH_CONFIG

2015-07-08T16:24:39+00:00

Hisilicon SMMUv3 devices treat CMD_PREFETCH_CONFIG as a illegal command, execute it will trigger GERROR interrupt. Although the gerror code manage to turn the prefetch into a SYNC, and the system can continue to run normally, but it's ugly to print error information. Signed-off-by: Zhen Lei [will: extended binding documentation] Signed-off-by: Will Deacon

iommu/arm-smmu: Enlarge STRTAB_L1_SZ_SHIFT to support larger sidsize

2015-07-08T16:24:39+00:00

Because we will choose the minimum value between STRTAB_L1_SZ_SHIFT and IDR1.SIDSIZE, so enlarge STRTAB_L1_SZ_SHIFT will not impact the platforms whose IDR1.SIDSIZE is smaller than old STRTAB_L1_SZ_SHIFT value. Signed-off-by: Zhen Lei Signed-off-by: Will Deacon

iommu/arm-smmu: Fix the values of ARM64_TCR_{I,O}RGN0_SHIFT

2015-07-08T16:24:39+00:00

The arm64 CPU architecture defines TCR[8:11] as holding the inner and outer memory attributes for TTBR0. This patch fixes the ARM SMMUv3 driver to pack these bits into the context descriptor, rather than picking up the TTBR1 attributes as it currently does. Signed-off-by: Zhen Lei Signed-off-by: Will Deacon