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

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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.

Also since acpi_table_begin() reserves space only for standard header
while previous acpi_data_push() reserved the header + 4 bytes field,
add 4 bytes 'Reserved' field into hmat_build_table_structs()
which didn have it.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-10-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2021-09-24 08:27:36 -04:00 committed by Michael S. Tsirkin
parent 578bc7a064
commit 689ef4721a
1 changed files with 6 additions and 8 deletions
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14
hw/acpi/hmat.c
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@ -200,6 +200,8 @@ static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
HMAT_LB_Info *hmat_lb;
NumaHmatCacheOptions *hmat_cache;
build_append_int_noprefix(table_data, 0, 4); /* Reserved */
for (i = 0; i < numa_state->num_nodes; i++) {
flags = 0;
@ -256,14 +258,10 @@ static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state,
const char *oem_id, const char *oem_table_id)
{
int hmat_start = table_data->len;
/* reserve space for HMAT header */
acpi_data_push(table_data, 40);
AcpiTable table = { .sig = "HMAT", .rev = 2,
.oem_id = oem_id, .oem_table_id = oem_table_id };
acpi_table_begin(&table, table_data);
hmat_build_table_structs(table_data, numa_state);
build_header(linker, table_data,
(void *)(table_data->data + hmat_start),
"HMAT", table_data->len - hmat_start, 2, oem_id, oem_table_id);
acpi_table_end(linker, &table);
}