[Qemu-devel] [V9 2/4] hw/i386: ACPI table for AMD IOMMU

[David Kiarie <davidkiarie4@gmail.com>]

Add IVRS table for AMD IOMMU. Generate IVRS or DMAR
depending on emulated IOMMU

Signed-off-by: David Kiarie <davidkiarie4@gmail.com>
---
 hw/acpi/aml-build.c         |   2 +-
 hw/acpi/core.c              |  13 ------
 hw/i386/acpi-build.c        | 101 +++++++++++++++++++++++++++++++++++++++-----
 include/hw/acpi/acpi-defs.h |  14 ++++++
 include/hw/acpi/acpi.h      |  16 +++++++
 include/hw/acpi/aml-build.h |   1 +
 6 files changed, 122 insertions(+), 25 deletions(-)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index ab89ca6..da11bf8 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -227,7 +227,7 @@ static void build_extop_package(GArray *package, uint8_t op)
     build_prepend_byte(package, 0x5B); /* ExtOpPrefix */
 }
 
-static void build_append_int_noprefix(GArray *table, uint64_t value, int size)
+void build_append_int_noprefix(GArray *table, uint64_t value, int size)
 {
     int i;
 
diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 7925a1a..ee0e687 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -29,19 +29,6 @@
 #include "qapi-visit.h"
 #include "qapi-event.h"
 
-struct acpi_table_header {
-    uint16_t _length;         /* our length, not actual part of the hdr */
-                              /* allows easier parsing for fw_cfg clients */
-    char sig[4];              /* ACPI signature (4 ASCII characters) */
-    uint32_t length;          /* Length of table, in bytes, including header */
-    uint8_t revision;         /* ACPI Specification minor version # */
-    uint8_t checksum;         /* To make sum of entire table == 0 */
-    char oem_id[6];           /* OEM identification */
-    char oem_table_id[8];     /* OEM table identification */
-    uint32_t oem_revision;    /* OEM revision number */
-    char asl_compiler_id[4];  /* ASL compiler vendor ID */
-    uint32_t asl_compiler_revision; /* ASL compiler revision number */
-} QEMU_PACKED;
 
 #define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header)
 #define ACPI_TABLE_PFX_SIZE sizeof(uint16_t)  /* size of the extra prefix */
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 6477003..19efc68 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -52,6 +52,7 @@
 #include "hw/pci/pci_bus.h"
 #include "hw/pci-host/q35.h"
 #include "hw/i386/intel_iommu.h"
+#include "hw/i386/amd_iommu.h"
 #include "hw/timer/hpet.h"
 
 #include "hw/acpi/aml-build.h"
@@ -118,6 +119,12 @@ typedef struct AcpiBuildPciBusHotplugState {
     bool pcihp_bridge_en;
 } AcpiBuildPciBusHotplugState;
 
+typedef enum IommuType {
+    TYPE_AMD,
+    TYPE_INTEL,
+    TYPE_NONE
+} IommuType;
+
 static void acpi_get_pm_info(AcpiPmInfo *pm)
 {
     Object *piix = piix4_pm_find();
@@ -2598,6 +2605,81 @@ build_dmar_q35(GArray *table_data, GArray *linker)
                  "DMAR", table_data->len - dmar_start, 1, NULL, NULL);
 }
 
+#define IOMMU_IVRS_LENGTH 0x30
+/* increase ivdb length if more devices are added */
+#define IOMMU_IVDB_LENGTH 0x20
+
+static void
+build_amd_iommu(GArray *table_data, GArray *linker)
+{
+    int iommu_start = table_data->len;
+    bool iommu_ambig;
+
+    /* IVRS definition  - table header has an extra 2-byte field */
+    acpi_data_push(table_data, (sizeof(acpi_table_header) - 2));
+    /* common virtualization information */
+    build_append_int_noprefix(table_data, AMD_IOMMU_HOST_ADDRESS_WIDTH << 8, 4);
+    /* reserved */
+    build_append_int_noprefix(table_data, 0, 8);
+
+    AMDIOMMUState *s = (AMDIOMMUState *)object_resolve_path_type("",
+                        TYPE_AMD_IOMMU_DEVICE, &iommu_ambig);
+
+    /* IVDB definition - type 10h */
+    if (!iommu_ambig) {
+        /* IVHD definition - type 10h */
+        build_append_int_noprefix(table_data, 0x10, 1);
+        /* virtualization flags */
+        build_append_int_noprefix(table_data, (IVHD_HT_TUNEN |
+                     IVHD_PPRSUP | IVHD_IOTLBSUP | IVHD_PREFSUP), 1);
+        /* ivhd length */
+        build_append_int_noprefix(table_data, IOMMU_IVDB_LENGTH, 2);
+        /* iommu device id */
+        build_append_int_noprefix(table_data, PCI_DEVICE_ID_RD890_IOMMU, 2);
+        /* offset of capability registers */
+        build_append_int_noprefix(table_data, s->capab_offset, 2);
+        /* mmio base register */
+        build_append_int_noprefix(table_data, s->mmio.addr, 8);
+        /* pci segment */
+        build_append_int_noprefix(table_data, 0, 2);
+        /* interrupt numbers */
+        build_append_int_noprefix(table_data, 0, 2);
+        /* feature reporting */
+        build_append_int_noprefix(table_data, (IVHD_EFR_GTSUP |
+                    IVHD_EFR_HATS | IVHD_EFR_GATS), 4);
+        /* Add device flags here
+         *   This is are 4-byte device entries currently reporting the range of
+         *   devices 00h - ffffh; all devices
+         *   Device setting affecting all devices should be made here
+         *
+         *   Refer to
+         *   (http://developer.amd.com/wordpress/media/2012/10/488821.pdf)
+         *   Table 95
+         */
+        /* start of device range, 4-byte entries */
+        build_append_int_noprefix(table_data, 0x03000000, 4);
+        /* end of device range */
+        build_append_int_noprefix(table_data, 0x04ffff00, 4);
+    }
+
+    build_header(linker, table_data, (void *)(table_data->data + iommu_start),
+                 "IVRS", table_data->len - iommu_start, 1, NULL, NULL);
+}
+
+static IommuType has_iommu(void)
+{
+    bool ambiguous;
+
+    if (object_resolve_path_type("", TYPE_AMD_IOMMU_DEVICE, &ambiguous)
+            && !ambiguous)
+        return TYPE_AMD;
+    else if (object_resolve_path_type("", TYPE_INTEL_IOMMU_DEVICE, &ambiguous)
+            && !ambiguous)
+        return TYPE_INTEL;
+    else
+        return TYPE_NONE;
+}
+
 static GArray *
 build_rsdp(GArray *rsdp_table, GArray *linker, unsigned rsdt)
 {
@@ -2656,16 +2738,6 @@ static bool acpi_get_mcfg(AcpiMcfgInfo *mcfg)
     return true;
 }
 
-static bool acpi_has_iommu(void)
-{
-    bool ambiguous;
-    Object *intel_iommu;
-
-    intel_iommu = object_resolve_path_type("", TYPE_INTEL_IOMMU_DEVICE,
-                                           &ambiguous);
-    return intel_iommu && !ambiguous;
-}
-
 static
 void acpi_build(AcpiBuildTables *tables, MachineState *machine)
 {
@@ -2678,6 +2750,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
     AcpiMcfgInfo mcfg;
     PcPciInfo pci;
     uint8_t *u;
+    IommuType IOMMUType = has_iommu();
     size_t aml_len = 0;
     GArray *tables_blob = tables->table_data;
     AcpiSlicOem slic_oem = { .id = NULL, .table_id = NULL };
@@ -2743,7 +2816,13 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
         acpi_add_table(table_offsets, tables_blob);
         build_mcfg_q35(tables_blob, tables->linker, &mcfg);
     }
-    if (acpi_has_iommu()) {
+
+    if (IOMMUType == TYPE_AMD) {
+        acpi_add_table(table_offsets, tables_blob);
+        build_amd_iommu(tables_blob, tables->linker);
+    }
+
+    if (IOMMUType == TYPE_INTEL) {
         acpi_add_table(table_offsets, tables_blob);
         build_dmar_q35(tables_blob, tables->linker);
     }
diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index c7a03d4..114227a 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -570,4 +570,18 @@ typedef struct AcpiDmarHardwareUnit AcpiDmarHardwareUnit;
 /* Masks for Flags field above */
 #define ACPI_DMAR_INCLUDE_PCI_ALL   1
 
+/* IVRS constants */
+#define AMD_IOMMU_HOST_ADDRESS_WIDTH 39UL
+
+/* flags in the IVHD headers */
+#define IVHD_HT_TUNEN    (1UL << 0)
+#define IVHD_IOTLBSUP    (1UL << 4)
+#define IVHD_PREFSUP     (1UL << 6)
+#define IVHD_PPRSUP      (1UL << 7)
+
+/* features in the IVHD headers */
+#define IVHD_EFR_HATS       48
+#define IVHD_EFR_GATS       48
+#define IVHD_EFR_GTSUP  (1UL << 2)
+
 #endif
diff --git a/include/hw/acpi/acpi.h b/include/hw/acpi/acpi.h
index e0978c8..a708b84 100644
--- a/include/hw/acpi/acpi.h
+++ b/include/hw/acpi/acpi.h
@@ -201,4 +201,20 @@ struct AcpiSlicOem {
 };
 int acpi_get_slic_oem(AcpiSlicOem *oem);
 
+struct acpi_table_header {
+    uint16_t _length;         /* our length, not actual part of the hdr */
+                              /* allows easier parsing for fw_cfg clients */
+    char sig[4];              /* ACPI signature (4 ASCII characters) */
+    uint32_t length;          /* Length of table, in bytes, including header */
+    uint8_t revision;         /* ACPI Specification minor version # */
+    uint8_t checksum;         /* To make sum of entire table == 0 */
+    char oem_id[6];           /* OEM identification */
+    char oem_table_id[8];     /* OEM table identification */
+    uint32_t oem_revision;    /* OEM revision number */
+    char asl_compiler_id[4];  /* ASL compiler vendor ID */
+    uint32_t asl_compiler_revision; /* ASL compiler revision number */
+} QEMU_PACKED;
+
+typedef struct acpi_table_header acpi_table_header;
+
 #endif /* !QEMU_HW_ACPI_H */
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 2c994b3..d25e9a5 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -355,6 +355,7 @@ Aml *aml_derefof(Aml *arg);
 Aml *aml_sizeof(Aml *arg);
 Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target);
 
+void build_append_int_noprefix(GArray *table, uint64_t value, int size);
 void
 build_header(GArray *linker, GArray *table_data,
              AcpiTableHeader *h, const char *sig, int len, uint8_t rev,
-- 
2.1.4