diff options
| author | Mike Travis <travis@sgi.com> | 2011-05-28 20:15:06 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2011-06-01 13:47:46 +0200 |
| commit | 825507d6d059f1cbe2503e0e5a3926225b983aec (patch) | |
| tree | 8f191cb5c4704a4710c7b89b81d9629206714d3b /drivers/pci/intel-iommu.c | |
| parent | intel-iommu: Use coherent DMA mask when requested (diff) | |
| download | linux-825507d6d059f1cbe2503e0e5a3926225b983aec.tar.xz linux-825507d6d059f1cbe2503e0e5a3926225b983aec.zip | |
intel-iommu: Remove Host Bridge devices from identity mapping
When using the 1:1 (identity) PCI DMA remapping, PCI Host Bridge devices
that do not use the IOMMU causes a kernel panic. Fix that by not
inserting those devices into the si_domain.
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Mike Habeck <habeck@sgi.com>
Cc: stable@kernel.org
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 5cbab7f19ae0..7f757ce60c5a 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -46,6 +46,8 @@ #define ROOT_SIZE VTD_PAGE_SIZE #define CONTEXT_SIZE VTD_PAGE_SIZE +#define IS_BRIDGE_HOST_DEVICE(pdev) \ + ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST) #define IS_GFX_DEVICE(pdev) ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) #define IS_ISA_DEVICE(pdev) ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) #define IS_AZALIA(pdev) ((pdev)->vendor == 0x8086 && (pdev)->device == 0x3a3e) @@ -2343,6 +2345,9 @@ static int __init iommu_prepare_static_identity_mapping(int hw) return -EFAULT; for_each_pci_dev(pdev) { + /* Skip Host/PCI Bridge devices */ + if (IS_BRIDGE_HOST_DEVICE(pdev)) + continue; if (iommu_should_identity_map(pdev, 1)) { printk(KERN_INFO "IOMMU: %s identity mapping for device %s\n", hw ? "hardware" : "software", pci_name(pdev)); |