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-rw-r--r--drivers/pci/intel-iommu.c40
1 files changed, 21 insertions, 19 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index da40f078973..57be89e6f48 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);
}