TPM2 ACPI table support

Add a TPM2 ACPI table if a TPM 2 is used in the backend.
Also add an SSDT for the TPM 2.

Rename tpm_find() to tpm_get_version() and have this function
return the version of the TPM found, TPMVersion_Unspec if
no TPM is found. Use the version number to build version
specific ACPI tables.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index f503ec4a97..59cf277434 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -450,6 +450,9 @@ typedef struct AcpiTableMcfg AcpiTableMcfg;
 
 /*
  * TCPA Description Table
+ *
+ * Following Level 00, Rev 00.37 of specs:
+ * http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
  */
 struct Acpi20Tcpa {
     ACPI_TABLE_HEADER_DEF                    /* ACPI common table header */
@@ -459,6 +462,21 @@ struct Acpi20Tcpa {
 } QEMU_PACKED;
 typedef struct Acpi20Tcpa Acpi20Tcpa;
 
+/*
+ * TPM2
+ *
+ * Following Level 00, Rev 00.37 of specs:
+ * http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
+ */
+struct Acpi20TPM2 {
+    ACPI_TABLE_HEADER_DEF
+    uint16_t platform_class;
+    uint16_t reserved;
+    uint64_t control_area_address;
+    uint32_t start_method;
+} QEMU_PACKED;
+typedef struct Acpi20TPM2 Acpi20TPM2;
+
 /* DMAR - DMA Remapping table r2.2 */
 struct AcpiTableDmar {
     ACPI_TABLE_HEADER_DEF