Merge branch 'iommufd/arm-smmuv3-nested' of iommu/linux into iommufd for-next

Common SMMUv3 patches for the following patches adding nesting, shared
branch with the iommu tree.

* 'iommufd/arm-smmuv3-nested' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/iommu/linux:
  iommu/arm-smmu-v3: Expose the arm_smmu_attach interface
  iommu/arm-smmu-v3: Implement IOMMU_HWPT_ALLOC_NEST_PARENT
  iommu/arm-smmu-v3: Support IOMMU_GET_HW_INFO via struct arm_smmu_hw_info
  iommu/arm-smmu-v3: Report IOMMU_CAP_ENFORCE_CACHE_COHERENCY for CANWBS
  ACPI/IORT: Support CANWBS memory access flag
  ACPICA: IORT: Update for revision E.f
  vfio: Remove VFIO_TYPE1_NESTING_IOMMU
  ...

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

3 files changed, 37 insertions, 2 deletions

diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h
index badb41c5bfa4..f4f76759b738 100644
--- a/include/uapi/linux/iommufd.h
+++ b/include/uapi/linux/iommufd.h
@@ -514,14 +514,49 @@ struct iommu_hw_info_vtd {
 };
 
 /**
+ * struct iommu_hw_info_arm_smmuv3 - ARM SMMUv3 hardware information
+ *                                   (IOMMU_HW_INFO_TYPE_ARM_SMMUV3)
+ *
+ * @flags: Must be set to 0
+ * @__reserved: Must be 0
+ * @idr: Implemented features for ARM SMMU Non-secure programming interface
+ * @iidr: Information about the implementation and implementer of ARM SMMU,
+ *        and architecture version supported
+ * @aidr: ARM SMMU architecture version
+ *
+ * For the details of @idr, @iidr and @aidr, please refer to the chapters
+ * from 6.3.1 to 6.3.6 in the SMMUv3 Spec.
+ *
+ * User space should read the underlying ARM SMMUv3 hardware information for
+ * the list of supported features.
+ *
+ * Note that these values reflect the raw HW capability, without any insight if
+ * any required kernel driver support is present. Bits may be set indicating the
+ * HW has functionality that is lacking kernel software support, such as BTM. If
+ * a VMM is using this information to construct emulated copies of these
+ * registers it should only forward bits that it knows it can support.
+ *
+ * In future, presence of required kernel support will be indicated in flags.
+ */
+struct iommu_hw_info_arm_smmuv3 {
+	__u32 flags;
+	__u32 __reserved;
+	__u32 idr[6];
+	__u32 iidr;
+	__u32 aidr;
+};
+
+/**
  * enum iommu_hw_info_type - IOMMU Hardware Info Types
  * @IOMMU_HW_INFO_TYPE_NONE: Used by the drivers that do not report hardware
  *                           info
  * @IOMMU_HW_INFO_TYPE_INTEL_VTD: Intel VT-d iommu info type
+ * @IOMMU_HW_INFO_TYPE_ARM_SMMUV3: ARM SMMUv3 iommu info type
  */
 enum iommu_hw_info_type {
 	IOMMU_HW_INFO_TYPE_NONE = 0,
 	IOMMU_HW_INFO_TYPE_INTEL_VTD = 1,
+	IOMMU_HW_INFO_TYPE_ARM_SMMUV3 = 2,
 };
 
 /**
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index d6476ca5d7a6..9e9079321380 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -1694,7 +1694,7 @@ enum nft_flowtable_flags {
  *
  * @NFTA_FLOWTABLE_TABLE: name of the table containing the expression (NLA_STRING)
  * @NFTA_FLOWTABLE_NAME: name of this flow table (NLA_STRING)
- * @NFTA_FLOWTABLE_HOOK: netfilter hook configuration(NLA_U32)
+ * @NFTA_FLOWTABLE_HOOK: netfilter hook configuration (NLA_NESTED)
  * @NFTA_FLOWTABLE_USE: number of references to this flow table (NLA_U32)
  * @NFTA_FLOWTABLE_HANDLE: object handle (NLA_U64)
  * @NFTA_FLOWTABLE_FLAGS: flags (NLA_U32)
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 2b68e6cdf190..c8dbf8219c4f 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -35,7 +35,7 @@
 #define VFIO_EEH			5
 
 /* Two-stage IOMMU */
-#define VFIO_TYPE1_NESTING_IOMMU	6	/* Implies v2 */
+#define __VFIO_RESERVED_TYPE1_NESTING_IOMMU	6	/* Implies v2 */
 
 #define VFIO_SPAPR_TCE_v2_IOMMU		7