[Qemu-devel] [PULL v1 10/10] acpi: Update TPM2 ACPI table to more recent specs

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

From: Stefan Berger <Stefan Berger stefanb@linux.vnet.ibm.com>

More recent specs of the TPM2 ACPI table add fields for the log area
start address and the log area minimum size, which we already use
for the TCPA table.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 hw/i386/acpi-build.c        | 19 ++++++++++++++-----
 include/hw/acpi/acpi-defs.h |  7 +++++--
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 5a6dee0..18b939e 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2274,16 +2274,25 @@ build_tpm_tcpa(GArray *table_data, BIOSLinker *linker, GArray *tcpalog)
 }
 
 static void
-build_tpm2(GArray *table_data, BIOSLinker *linker)
+build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog)
 {
-    Acpi20TPM2 *tpm2_ptr;
-
-    tpm2_ptr = acpi_data_push(table_data, sizeof *tpm2_ptr);
+    Acpi20TPM2 *tpm2_ptr = acpi_data_push(table_data, sizeof *tpm2_ptr);
+    unsigned log_addr_size = sizeof(tpm2_ptr->log_area_start_address);
+    unsigned log_addr_offset =
+        (char *)&tpm2_ptr->log_area_start_address - table_data->data;
 
     tpm2_ptr->platform_class = cpu_to_le16(TPM2_ACPI_CLASS_CLIENT);
     if (TPM_IS_TIS(tpm_find())) {
         tpm2_ptr->control_area_address = cpu_to_le64(0);
         tpm2_ptr->start_method = cpu_to_le32(TPM2_START_METHOD_MMIO);
+
+        tpm2_ptr->log_area_minimum_length =
+            cpu_to_le32(TPM_LOG_AREA_MINIMUM_SIZE);
+
+        /* log area start address to be filled by Guest linker */
+        bios_linker_loader_add_pointer(linker,
+            ACPI_BUILD_TABLE_FILE, log_addr_offset, log_addr_size,
+            ACPI_BUILD_TPMLOG_FILE, 0);
     } else {
         g_warn_if_reached();
     }
@@ -2695,7 +2704,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
 
         if (misc.tpm_version == TPM_VERSION_2_0) {
             acpi_add_table(table_offsets, tables_blob);
-            build_tpm2(tables_blob, tables->linker);
+            build_tpm2(tables_blob, tables->linker, tables->tcpalog);
         }
     }
     if (pcms->numa_nodes) {
diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index 72be675..80c8099 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -558,8 +558,8 @@ typedef struct Acpi20Tcpa Acpi20Tcpa;
 /*
  * TPM2
  *
- * Following Level 00, Rev 00.37 of specs:
- * http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
+ * Following Version 1.2, Revision 8 of specs:
+ * https://trustedcomputinggroup.org/tcg-acpi-specification/
  */
 struct Acpi20TPM2 {
     ACPI_TABLE_HEADER_DEF
@@ -567,6 +567,9 @@ struct Acpi20TPM2 {
     uint16_t reserved;
     uint64_t control_area_address;
     uint32_t start_method;
+    uint8_t start_method_params[12];
+    uint32_t log_area_minimum_length;
+    uint64_t log_area_start_address;
 } QEMU_PACKED;
 typedef struct Acpi20TPM2 Acpi20TPM2;
 
-- 
2.5.5