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| author | Eric Auger <eric.auger@redhat.com> | 2019-06-03 08:53:33 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-06-12 10:32:59 +0200 |
| commit | e143fd4598ddf7401d3699957cd59ceb5426d53d (patch) | |
| tree | 9cf67a124b71f80c84d120d49a396fe6b3df6955 /drivers/iommu | |
| parent | b9a7f9816483b19360b92e9b8c91bea2f9f30308 (diff) | |
| download | linux-e143fd4598ddf7401d3699957cd59ceb5426d53d.tar.bz2 | |
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: ea2447f700ca ("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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 6747fec46cfb..0d7d177673dd 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2880,7 +2880,8 @@ static bool device_has_rmrr(struct device *dev) */ for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, i, tmp) - if (tmp == dev) { + if (tmp == dev || + is_downstream_to_pci_bridge(dev, tmp)) { rcu_read_unlock(); return true; } |