diff options
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index da40f0789739..57be89e6f484 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3433,19 +3433,6 @@ static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) /* domain id for virtual machine, it won't be set in context */ static unsigned long vm_domid; -static int vm_domain_min_agaw(struct dmar_domain *domain) -{ - int i; - int min_agaw = domain->agaw; - - for_each_set_bit(i, &domain->iommu_bmp, g_num_of_iommus) { - if (min_agaw > g_iommus[i]->agaw) - min_agaw = g_iommus[i]->agaw; - } - - return min_agaw; -} - static struct dmar_domain *iommu_alloc_vm_domain(void) { struct dmar_domain *domain; @@ -3574,7 +3561,6 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, struct pci_dev *pdev = to_pci_dev(dev); struct intel_iommu *iommu; int addr_width; - u64 end; /* normally pdev is not mapped */ if (unlikely(domain_context_mapped(pdev))) { @@ -3597,14 +3583,30 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, /* check if this iommu agaw is sufficient for max mapped address */ addr_width = agaw_to_width(iommu->agaw); - end = DOMAIN_MAX_ADDR(addr_width); - end = end & VTD_PAGE_MASK; - if (end < dmar_domain->max_addr) { - printk(KERN_ERR "%s: iommu agaw (%d) is not " + if (addr_width > cap_mgaw(iommu->cap)) + addr_width = cap_mgaw(iommu->cap); + + if (dmar_domain->max_addr > (1LL << addr_width)) { + printk(KERN_ERR "%s: iommu width (%d) is not " "sufficient for the mapped address (%llx)\n", - __func__, iommu->agaw, dmar_domain->max_addr); + __func__, addr_width, dmar_domain->max_addr); return -EFAULT; } + dmar_domain->gaw = addr_width; + + /* + * Knock out extra levels of page tables if necessary + */ + while (iommu->agaw < dmar_domain->agaw) { + struct dma_pte *pte; + + 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->agaw--; + } return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL); } |