iommu/vt-d: Allocate domain info for real DMA sub-devices

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Sub-devices of a real DMA device might exist on a separate segment than
the real DMA device and its IOMMU. These devices should still have a
valid device_domain_info, but the current dma alias model won't
allocate info for the subdevice.

This patch adds a segment member to struct device_domain_info and uses
the sub-device's BDF so that these sub-devices won't alias to other
devices.

Fixes: 2b0140c696 ("iommu/vt-d: Use pci_real_dma_dev() for mapping")
Cc: stable@vger.kernel.org # v5.6+
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200527165617.297470-3-jonathan.derrick@intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Jon Derrick 2020-05-27 10:56:16 -06:00 • committed by Joerg Roedel

parent 8038bdb855

commit 4fda230ecd

2 changed files with 16 additions and 4 deletions

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19

drivers/iommu/intel-iommu.c

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1

include/linux/intel-iommu.h

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