Commit e143fd45 authored by Eric Auger's avatar Eric Auger Committed by Joerg Roedel

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: ea2447f7 ("intel-iommu: Prevent devices with RMRRs from being placed into SI Domain")
Signed-off-by: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent b9a7f981
...@@ -2880,7 +2880,8 @@ static bool device_has_rmrr(struct device *dev) ...@@ -2880,7 +2880,8 @@ static bool device_has_rmrr(struct device *dev)
*/ */
for_each_active_dev_scope(rmrr->devices, for_each_active_dev_scope(rmrr->devices,
rmrr->devices_cnt, i, tmp) rmrr->devices_cnt, i, tmp)
if (tmp == dev) { if (tmp == dev ||
is_downstream_to_pci_bridge(dev, tmp)) {
rcu_read_unlock(); rcu_read_unlock();
return true; return true;
} }
......
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