On 6/25/21 5:17 AM, Igor Mammedov wrote:
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

Signed-off-by: Igor Mammedov <imamm...@redhat.com>

I applied patch 19 of this series along with this one and this one works (TPM 1.2 not so much with TCPA modifications):

Tested-by: Stefan Berger <stef...@linux.ibm.com>


---
CC: stef...@linux.vnet.ibm.com
---
  hw/acpi/aml-build.c | 11 +++++------
  1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 3da32301b6..159f998187 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -2098,13 +2098,14 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker, 
GArray *tcpalog,
                  const char *oem_id, const char *oem_table_id)
  {
      uint8_t start_method_params[12] = {};
-    unsigned log_addr_offset, tpm2_start;
+    unsigned log_addr_offset;
      uint64_t control_area_start_address;
      TPMIf *tpmif = tpm_find();
      uint32_t start_method;
+    AcpiTable table = { .sig = "TPM2", .rev = 4,
+                        .oem_id = oem_id, .oem_table_id = oem_table_id };

-    tpm2_start = table_data->len;
-    acpi_data_push(table_data, sizeof(AcpiTableHeader));
+    acpi_init_table(&table, table_data);

      /* Platform Class */
      build_append_int_noprefix(table_data, TPM2_ACPI_CLASS_CLIENT, 2);
@@ -2142,9 +2143,7 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker, 
GArray *tcpalog,
      bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
                                     log_addr_offset, 8,
                                     ACPI_BUILD_TPMLOG_FILE, 0);
-    build_header(linker, table_data,
-                 (void *)(table_data->data + tpm2_start),
-                 "TPM2", table_data->len - tpm2_start, 4, oem_id, 
oem_table_id);
+    acpi_table_composed(linker, &table);
  }
  #endif


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