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acpi: build_mcfg: 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: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-9-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 08:27:35 -04:00 committed by Michael S. Tsirkin
parent 13229858cf
commit 578bc7a064
1 changed files with 9 additions and 9 deletions
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18
hw/acpi/pci.c
View File

@ -28,19 +28,20 @@
#include "hw/acpi/pci.h"
#include "hw/pci/pcie_host.h"
/*
* PCI Firmware Specification, Revision 3.0
* 4.1.2 MCFG Table Description.
*/
void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info,
const char *oem_id, const char *oem_table_id)
{
int mcfg_start = table_data->len;
AcpiTable table = { .sig = "MCFG", .rev = 1,
.oem_id = oem_id, .oem_table_id = oem_table_id };
acpi_table_begin(&table, table_data);
/*
* PCI Firmware Specification, Revision 3.0
* 4.1.2 MCFG Table Description.
*/
acpi_data_push(table_data, sizeof(AcpiTableHeader));
/* Reserved */
build_append_int_noprefix(table_data, 0, 8);
/*
* Memory Mapped Enhanced Configuration Space Base Address Allocation
* Structure
@ -56,6 +57,5 @@ void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info,
/* Reserved */
build_append_int_noprefix(table_data, 0, 4);
build_header(linker, table_data, (void *)(table_data->data + mcfg_start),
"MCFG", table_data->len - mcfg_start, 1, oem_id, oem_table_id);
acpi_table_end(linker, &table);
}