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| author | Sheng Yang <sheng@linux.intel.com> | 2010-06-12 19:21:42 +0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-06-15 10:40:02 +0100 |
| commit | 25cbff1660d3f4c059a178a1e5b851be6d70c5e8 (patch) | |
| tree | b0f43789d01fcb89041195550a582a41dfb979d7 | |
| parent | 7e27d6e778cd87b6f2415515d7127eba53fe5d02 (diff) | |
| download | linux-3.10-25cbff1660d3f4c059a178a1e5b851be6d70c5e8.tar.gz linux-3.10-25cbff1660d3f4c059a178a1e5b851be6d70c5e8.tar.bz2 linux-3.10-25cbff1660d3f4c059a178a1e5b851be6d70c5e8.zip | |
intel-iommu: Fix reference by physical address in intel_iommu_attach_device()
Commit a99c47a2 "intel-iommu: errors with smaller iommu widths" replace the
dmar_domain->pgd with the first entry of page table when iommu's supported
width is smaller than dmar_domain's. But it use physical address directly
for new dmar_domain->pgd...
This result in KVM oops with VT-d on some machines.
Reported-by: Allen Kay <allen.m.kay@intel.com>
Cc: Tom Lyon <pugs@cisco.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/pci/intel-iommu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 796828fce34..3bd30557ce2 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3603,7 +3603,8 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, pte = dmar_domain->pgd; if (dma_pte_present(pte)) { free_pgtable_page(dmar_domain->pgd); - dmar_domain->pgd = (struct dma_pte *)dma_pte_addr(pte); + dmar_domain->pgd = (struct dma_pte *) + phys_to_virt(dma_pte_addr(pte)); } dmar_domain->agaw--; } |