iommu/vt-d: Multiple descriptors per qi_submit_sync()

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Current qi_submit_sync() only supports single invalidation descriptor
per submission and appends wait descriptor after each submission to
poll the hardware completion. This extends the qi_submit_sync() helper
to support multiple descriptors, and add an option so that the caller
could specify the Page-request Drain (PD) bit in the wait descriptor.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-13-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2020-05-16 14:20:55 +08:00 • committed by Joerg Roedel

parent 064a57d7dd

commit 8a1d824625

5 changed files with 52 additions and 32 deletions

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63

drivers/iommu/dmar.c

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4

drivers/iommu/intel-pasid.c

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6

drivers/iommu/intel-svm.c

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2

drivers/iommu/intel_irq_remapping.c

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9

include/linux/intel-iommu.h

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