Re: [PATCH v9 00/10] iommu: I/O page faults for SMMUv3

Zhangfei Gao
2021-01-11T03:27:44Z

On 2021/1/8 下午10:52, Jean-Philippe Brucker wrote:
> Add stall support to the SMMUv3, along with a common I/O Page Fault
> handler.
>
> Changes since v8 [1]:
> * Added patches 1 and 2 which aren't strictly related to IOPF but need to
> be applied in order - 8 depends on 2 which depends on 1. Patch 2 moves
> pasid-num-bits to a device property, following Robin's comment on v8.
> * Patches 3-5 extract the IOPF feature from the SVA one, to support SVA
> implementations that handle I/O page faults through the device driver
> rather than the IOMMU driver [2]
> * Use device properties for dma-can-stall, instead of a special fwspec
> member.
> * Dropped PRI support for now, since it doesn't seem to be available in
> hardware and adds some complexity.
> * Had to drop some Acks and Tested tags unfortunately, due to code
> changes.
>
> As usual, you can get the latest SVA patches from
> http://jpbrucker.net/git/linux sva/current
>
> [1] https://lore.kernel.org/linux-iommu/20201112125519.3987595-1-jean-philippe@linaro.org/
> [2] https://lore.kernel.org/linux-iommu/BY5PR12MB3764F5D07E8EC48327E39C86B3C60@BY5PR12MB3764.namprd12.prod.outlook.com/
>
> Jean-Philippe Brucker (10):
> iommu: Remove obsolete comment
> iommu/arm-smmu-v3: Use device properties for pasid-num-bits
> iommu: Separate IOMMU_DEV_FEAT_IOPF from IOMMU_DEV_FEAT_SVA
> iommu/vt-d: Support IOMMU_DEV_FEAT_IOPF
> uacce: Enable IOMMU_DEV_FEAT_IOPF
> iommu: Add a page fault handler
> iommu/arm-smmu-v3: Maintain a SID->device structure
> dt-bindings: document stall property for IOMMU masters
> ACPI/IORT: Enable stall support for platform devices
> iommu/arm-smmu-v3: Add stall support for platform devices

Thanks Jean
I have tested on Hisilicon Kunpeng920 board.

Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>

Thanks