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iommu/vt-d: Handle RMRR with PCI bridge device scopes
When reading the vtd specification and especially the
Reserved Memory Region Reporting Structure chapter,
it is not obvious a device scope element cannot be a
PCI-PCI bridge, in which case all downstream ports are
likely to access the reserved memory region. Let's handle
this case in device_has_rmrr.
Fixes: ea2447f700
("intel-iommu: Prevent devices with RMRRs from being placed into SI Domain")
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>
This commit is contained in:
parent
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1 changed files with 2 additions and 1 deletions
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@ -2880,7 +2880,8 @@ static bool device_has_rmrr(struct device *dev)
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*/
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*/
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for_each_active_dev_scope(rmrr->devices,
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for_each_active_dev_scope(rmrr->devices,
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rmrr->devices_cnt, i, tmp)
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rmrr->devices_cnt, i, tmp)
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if (tmp == dev) {
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if (tmp == dev ||
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is_downstream_to_pci_bridge(dev, tmp)) {
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rcu_read_unlock();
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rcu_read_unlock();
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return true;
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return true;
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}
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}
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