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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-04-04 00:39:25 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-04-04 10:43:29 +0100
commit924b6231edfaf1e764ffb4f97ea382bf4facff58 (patch)
treeb51226e356c458d58c20a4c0dd1cb17c12b67086 /drivers/pci
parentd0b03bd1c6725a3463290d7f9626e4b583518a5a (diff)
downloadop-kernel-dev-924b6231edfaf1e764ffb4f97ea382bf4facff58.zip
op-kernel-dev-924b6231edfaf1e764ffb4f97ea382bf4facff58.tar.gz
intel-iommu: Fix device-to-iommu mapping for PCI-PCI bridges.
When the DMAR table identifies that a PCI-PCI bridge belongs to a given IOMMU, that means that the bridge and all devices behind it should be associated with the IOMMU. Not just the bridge itself. This fixes the device_to_iommu() function accordingly. (It's broken if you have the same PCI bus numbers in multiple domains, but this function was always broken in that way; I'll be dealing with that later). Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/intel-iommu.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index f3eebd2..6262c19 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -477,11 +477,16 @@ static struct intel_iommu *device_to_iommu(u8 bus, u8 devfn)
if (drhd->ignored)
continue;
- for (i = 0; i < drhd->devices_cnt; i++)
+ for (i = 0; i < drhd->devices_cnt; i++) {
if (drhd->devices[i] &&
drhd->devices[i]->bus->number == bus &&
drhd->devices[i]->devfn == devfn)
return drhd->iommu;
+ if (drhd->devices[i]->subordinate &&
+ drhd->devices[i]->subordinate->number <= bus &&
+ drhd->devices[i]->subordinate->subordinate >= bus)
+ return drhd->iommu;
+ }
if (drhd->include_all)
return drhd->iommu;
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