8902 Panic with debug kernel on AMD Ryzen hardware

@@ -17,10 +17,11 @@
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
+ * Copyright 2017 Gary Mills
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #ifndef _AMD_IOMMU_ACPI_H
 #define _AMD_IOMMU_ACPI_H

@@ -38,17 +39,20 @@
 #ifdef _KERNEL
 
 #define IVRS_SIG        "IVRS"
 
 /*
- * IVINFO settings
+ * IVINFO bit fields
+ * Documented at: http://support.amd.com/TechDocs/48882_IOMMU.pdf
  */
 #define AMD_IOMMU_ACPI_IVINFO_RSV1      (31 << 16 | 23)
 #define AMD_IOMMU_ACPI_HT_ATSRSV        (22 << 16 | 22)
 #define AMD_IOMMU_ACPI_VA_SIZE          (21 << 16 | 15)
 #define AMD_IOMMU_ACPI_PA_SIZE          (14 << 16 | 8)
-#define AMD_IOMMU_ACPI_IVINFO_RSV2      (7 << 16 | 0)
+#define AMD_IOMMU_ACPI_GVA_SIZE         (7 << 16 | 5)
+#define AMD_IOMMU_ACPI_IVINFO_RSV2      (4 << 16 | 1)
+#define AMD_IOMMU_ACPI_IVINFO_EFRSUP    (0 << 16 | 0)
 
 /*
  * IVHD Device entry len field
  */
 #define AMD_IOMMU_ACPI_DEVENTRY_LEN     (7 << 16 | 6)