acpi: acpi_build_hest: use acpi_table_begin()/acpi_table_end() instead of build_header()

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 <imammedo@redhat.com>
Reviewed-by: Dongjiu Geng <gengdongjiu1@gmail.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-8-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index a749b84..45d9a80 100644 (file)
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -362,18 +362,16 @@ static void build_ghes_v2(GArray *table_data, int source_id, BIOSLinker *linker)
 void acpi_build_hest(GArray *table_data, BIOSLinker *linker,
                      const char *oem_id, const char *oem_table_id)
 {
-    uint64_t hest_start = table_data->len;
+    AcpiTable table = { .sig = "HEST", .rev = 1,
+                        .oem_id = oem_id, .oem_table_id = oem_table_id };
 
-    /* Hardware Error Source Table header*/
-    acpi_data_push(table_data, sizeof(AcpiTableHeader));
+    acpi_table_begin(&table, table_data);
 
     /* Error Source Count */
     build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
-
     build_ghes_v2(table_data, ACPI_HEST_SRC_ID_SEA, linker);
 
-    build_header(linker, table_data, (void *)(table_data->data + hest_start),
-                 "HEST", table_data->len - hest_start, 1, oem_id, oem_table_id);
+    acpi_table_end(linker, &table);
 }
 
 void acpi_ghes_add_fw_cfg(AcpiGhesState *ags, FWCfgState *s,