Merge tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull iommu fixes from Will Deacon:
 "Two straightforward vt-d fixes:

   - Fix boot when intel iommu initialisation fails under TXT (tboot)

   - Fix intel iommu compilation error when DMAR is enabled without ATS

  and temporarily update IOMMU MAINTAINERs entry"

* tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  MAINTAINERS: Temporarily add myself to the IOMMU entry
  iommu/vt-d: Fix compile error with CONFIG_PCI_ATS not set
  iommu/vt-d: Avoid panic if iommu init fails in tboot system

Author: torvalds

MAINTAINERS

@@ -9162,6 +9162,7 @@ F:	include/linux/iomap.h
 
 IOMMU DRIVERS
 M:	Joerg Roedel <joro@8bytes.org>
+M:	Will Deacon <will@kernel.org>
 L:	iommu@lists.linux-foundation.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git

arch/x86/kernel/tboot.c

@@ -514,9 +514,6 @@ int tboot_force_iommu(void)
 	if (!tboot_enabled())
 		return 0;
 
-	if (intel_iommu_tboot_noforce)
-		return 1;
-
 	if (no_iommu || swiotlb || dmar_disabled)
 		pr_warn("Forcing Intel-IOMMU to enabled\n");
 

drivers/iommu/intel/dmar.c

@@ -335,7 +335,9 @@ static void  dmar_pci_bus_del_dev(struct dmar_pci_notify_info *info)
 
 static inline void vf_inherit_msi_domain(struct pci_dev *pdev)
 {
-	dev_set_msi_domain(&pdev->dev, dev_get_msi_domain(&pdev->physfn->dev));
+	struct pci_dev *physfn = pci_physfn(pdev);
+
+	dev_set_msi_domain(&pdev->dev, dev_get_msi_domain(&physfn->dev));
 }
 
 static int dmar_pci_bus_notifier(struct notifier_block *nb,

drivers/iommu/intel/iommu.c

@@ -179,7 +179,7 @@ static int rwbf_quirk;
  * (used when kernel is launched w/ TXT)
  */
 static int force_on = 0;
-int intel_iommu_tboot_noforce;
+static int intel_iommu_tboot_noforce;
 static int no_platform_optin;
 
 #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry))
@@ -4884,7 +4884,8 @@ int __init intel_iommu_init(void)
 	 * Intel IOMMU is required for a TXT/tboot launch or platform
 	 * opt in, so enforce that.
 	 */
-	force_on = tboot_force_iommu() || platform_optin_force_iommu();
+	force_on = (!intel_iommu_tboot_noforce && tboot_force_iommu()) ||
+		    platform_optin_force_iommu();
 
 	if (iommu_init_mempool()) {
 		if (force_on)

include/linux/intel-iommu.h

@@ -798,7 +798,6 @@ extern int iommu_calculate_agaw(struct intel_iommu *iommu);
 extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
 extern int dmar_disabled;
 extern int intel_iommu_enabled;
-extern int intel_iommu_tboot_noforce;
 extern int intel_iommu_gfx_mapped;
 #else
 static inline int iommu_calculate_agaw(struct intel_iommu *iommu)