IORT revision C has been published with a number of new SMMU
implementation identifiers. Since IORT doesn't have any way of falling
back to a more generic model code, we really need Linux to know about
these before vendors start updating their firmware tables to use them.

CC: Rafael J. Wysocki <redacted>
CC: Robert Moore <redacted>
CC: Lv Zheng <redacted>
Acked-by: Robert Richter <redacted>
Tested-by: Robert Richter <redacted>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---

v2: Update more comments, add Robert's tags.

I'm including this here as a kernel patch just for context - once I've
figured out how we actually submit patches to ACPICA directly, I'll do
that per the preferred process.

Robin.

  include/acpi/actbl2.h | 12 ++++++++++--
  1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index faa9f2c0d5de..f469ea41f2fd 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h

@@ -663,7 +663,7 @@ struct acpi_ibft_target {
   * IORT - IO Remapping Table
   *
   * Conforms to "IO Remapping Table System Software on ARM Platforms",
- * Document number: ARM DEN 0049B, October 2015
+ * Document number: ARM DEN 0049C, May 2017
   *
   ******************************************************************************/
  

@@ -778,6 +778,8 @@ struct acpi_iort_smmu {
  #define ACPI_IORT_SMMU_V2               0x00000001	/* Generic SMMUv2 */
  #define ACPI_IORT_SMMU_CORELINK_MMU400  0x00000002	/* ARM Corelink MMU-400 */
  #define ACPI_IORT_SMMU_CORELINK_MMU500  0x00000003	/* ARM Corelink MMU-500 */
+#define ACPI_IORT_SMMU_CORELINK_MMU401  0x00000004	/* ARM Corelink MMU-401 */
+#define ACPI_IORT_SMMU_CAVIUM_SMMUV2    0x00000005	/* Cavium ThunderX SMMUv2 */
  
  /* Masks for Flags field above */
  

@@ -798,13 +800,19 @@ struct acpi_iort_smmu_v3 {
  	u32 flags;
  	u32 reserved;
  	u64 vatos_address;
-	u32 model;		/* O: generic SMMUv3 */
+	u32 model;
  	u32 event_gsiv;
  	u32 pri_gsiv;
  	u32 gerr_gsiv;
  	u32 sync_gsiv;
  };
  
+/* Values for Model field above */
+
+#define ACPI_IORT_SMMU_V3               0x00000000	/* Generic SMMUv3 */
+#define ACPI_IORT_SMMU_HISILICON_HI161X 0x00000001	/* HiSilicon Hi161x SMMUv3 */
+#define ACPI_IORT_SMMU_CAVIUM_CN99XX    0x00000002	/* Cavium CN99xx SMMUv3 */
+
  /* Masks for Flags field above */
  
  #define ACPI_IORT_SMMU_V3_COHACC_OVERRIDE   (1)