iommu/vt-d: Differentiate relaxable and non relaxable RMRRs

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Now we have a new IOMMU_RESV_DIRECT_RELAXABLE reserved memory
region type, let's report USB and GFX RMRRs as relaxable ones.

We introduce a new device_rmrr_is_relaxable() helper to check
whether the rmrr belongs to the relaxable category.

This allows to have a finer reporting at IOMMU API level of
reserved memory regions. This will be exploitable by VFIO to
define the usable IOVA range and detect potential conflicts
between the guest physical address space and host reserved
regions.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Eric Auger 2019-06-03 08:53:36 +02:00 • committed by Joerg Roedel

parent adfd373820

commit 1c5c59fbad

1 changed files with 39 additions and 15 deletions

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drivers/iommu/intel-iommu.c

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