Merge git://git.infradead.org/iommu-2.6

* git://git.infradead.org/iommu-2.6: (23 commits)
  intel-iommu: Disable PMRs after we enable translation, not before
  intel-iommu: Kill DMAR_BROKEN_GFX_WA option.
  intel-iommu: Fix integer wrap on 32 bit kernels
  intel-iommu: Fix integer overflow in dma_pte_{clear_range,free_pagetable}()
  intel-iommu: Limit DOMAIN_MAX_PFN to fit in an 'unsigned long'
  intel-iommu: Fix kernel hang if interrupt remapping disabled in BIOS
  intel-iommu: Disallow interrupt remapping if not all ioapics covered
  intel-iommu: include linux/dmi.h to use dmi_ routines
  pci/dmar: correct off-by-one error in dmar_fault()
  intel-iommu: Cope with yet another BIOS screwup causing crashes
  intel-iommu: iommu init error path bug fixes
  intel-iommu: Mark functions with __init
  USB: Work around BIOS bugs by quiescing USB controllers earlier
  ia64: IOMMU passthrough mode shouldn't trigger swiotlb init
  intel-iommu: make domain_add_dev_info() call domain_context_mapping()
  intel-iommu: Unify hardware and software passthrough support
  intel-iommu: Cope with broken HP DC7900 BIOS
  iommu=pt is a valid early param
  intel-iommu: double kfree()
  intel-iommu: Kill pointless intel_unmap_single() function
  ...

Fixed up trivial include lines conflict in drivers/pci/intel-iommu.c

1 files changed, 29 insertions, 8 deletions

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 5f6b915d0d8..14bbaa17e2c 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -577,9 +577,6 @@ int __init dmar_table_init(void)
                 printk(KERN_INFO PREFIX "No ATSR found\n");
 #endif
 
-#ifdef CONFIG_INTR_REMAP
-        parse_ioapics_under_ir();
-#endif
         return 0;
 }
 
@@ -639,20 +636,31 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
         iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG);
         iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG);
 
+        if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) {
+                /* Promote an attitude of violence to a BIOS engineer today */
+                WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n"
+                     "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+                     drhd->reg_base_addr,
+                     dmi_get_system_info(DMI_BIOS_VENDOR),
+                     dmi_get_system_info(DMI_BIOS_VERSION),
+                     dmi_get_system_info(DMI_PRODUCT_VERSION));
+                goto err_unmap;
+        }
+
 #ifdef CONFIG_DMAR
         agaw = iommu_calculate_agaw(iommu);
         if (agaw < 0) {
                 printk(KERN_ERR
                        "Cannot get a valid agaw for iommu (seq_id = %d)\n",
                        iommu->seq_id);
-                goto error;
+                goto err_unmap;
         }
         msagaw = iommu_calculate_max_sagaw(iommu);
         if (msagaw < 0) {
                 printk(KERN_ERR
                         "Cannot get a valid max agaw for iommu (seq_id = %d)\n",
                         iommu->seq_id);
-                goto error;
+                goto err_unmap;
         }
 #endif
         iommu->agaw = agaw;
@@ -672,7 +680,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
         }
 
         ver = readl(iommu->reg + DMAR_VER_REG);
-        pr_debug("IOMMU %llx: ver %d:%d cap %llx ecap %llx\n",
+        pr_info("IOMMU %llx: ver %d:%d cap %llx ecap %llx\n",
                 (unsigned long long)drhd->reg_base_addr,
                 DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver),
                 (unsigned long long)iommu->cap,
@@ -682,7 +690,10 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
 
         drhd->iommu = iommu;
         return 0;
-error:
+
+ err_unmap:
+        iounmap(iommu->reg);
+ error:
         kfree(iommu);
         return -1;
 }
@@ -1219,7 +1230,7 @@ irqreturn_t dmar_fault(int irq, void *dev_id)
                                 source_id, guest_addr);
 
                 fault_index++;
-                if (fault_index > cap_num_fault_regs(iommu->cap))
+                if (fault_index >= cap_num_fault_regs(iommu->cap))
                         fault_index = 0;
                 spin_lock_irqsave(&iommu->register_lock, flag);
         }
@@ -1312,3 +1323,13 @@ int dmar_reenable_qi(struct intel_iommu *iommu)
 
         return 0;
 }
+
+/*
+ * Check interrupt remapping support in DMAR table description.
+ */
+int dmar_ir_support(void)
+{
+        struct acpi_table_dmar *dmar;
+        dmar = (struct acpi_table_dmar *)dmar_tbl;
+        return dmar->flags & 0x1;
+}