Hi all, IDXD kernel work queues were disabled due to the flawed use of kernel VA and SVA API. Link: https://lore.kernel.org/linux-iommu/20210511194726.GP1002214@xxxxxxxxxx/ The solution is to enable it under DMA API where IDXD shared workqueue users can use ENQCMDS to submit work on buffers mapped by DMA API. This patchset adds support for attaching PASID to the device's default domain and the ability to reserve global PASIDs from SVA APIs. We can then re-enable the kernel work queues and use them under DMA API. This depends on the IOASID removal series. https://lore.kernel.org/linux-iommu/20230301235646.2692846-1-jacob.jun.pan@xxxxxxxxxxxxxxx/T/#t Thanks, Jacob Jacob Pan (4): iommu/vt-d: Implement set device pasid op for default domain iommu/vt-d: Use non-privileged mode for all PASIDs iommu/sva: Support reservation of global PASIDs dmaengine/idxd: Re-enable kernel workqueue under DMA API drivers/dma/idxd/device.c | 30 ++++------------------- drivers/dma/idxd/init.c | 47 +++++++++++++++++++++++++++++++++---- drivers/dma/idxd/sysfs.c | 7 ------ drivers/iommu/intel/iommu.c | 34 +++++++++++++++++++++++++-- drivers/iommu/iommu-sva.c | 25 ++++++++++++++++++++ include/linux/iommu.h | 14 +++++++++++ 6 files changed, 119 insertions(+), 38 deletions(-) -- 2.25.1
