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acpi: build_tpm_tcpa: 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.

While at it switch to build_append_int_noprefix() to build
table entries (which also removes some manual offset
calculations).

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-16-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 08:27:42 -04:00 committed by Michael S. Tsirkin
parent 43dde1705c
commit 57cb8cfbf2
2 changed files with 23 additions and 29 deletions
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38
hw/i386/acpi-build.c
View File

@ -1900,31 +1900,39 @@ build_hpet(GArray *table_data, BIOSLinker *linker, const char *oem_id,
}
#ifdef CONFIG_TPM
/*
* TCPA Description Table
*
* Following Level 00, Rev 00.37 of specs:
* http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
* 7.1.2 ACPI Table Layout
*/
static void
build_tpm_tcpa(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
const char *oem_id, const char *oem_table_id)
{
int tcpa_start = table_data->len;
Acpi20Tcpa *tcpa = acpi_data_push(table_data, sizeof *tcpa);
unsigned log_addr_size = sizeof(tcpa->log_area_start_address);
unsigned log_addr_offset =
(char *)&tcpa->log_area_start_address - table_data->data;
unsigned log_addr_offset;
AcpiTable table = { .sig = "TCPA", .rev = 2,
.oem_id = oem_id, .oem_table_id = oem_table_id };
tcpa->platform_class = cpu_to_le16(TPM_TCPA_ACPI_CLASS_CLIENT);
tcpa->log_area_minimum_length = cpu_to_le32(TPM_LOG_AREA_MINIMUM_SIZE);
acpi_data_push(tcpalog, le32_to_cpu(tcpa->log_area_minimum_length));
acpi_table_begin(&table, table_data);
/* Platform Class */
build_append_int_noprefix(table_data, TPM_TCPA_ACPI_CLASS_CLIENT, 2);
/* Log Area Minimum Length (LAML) */
build_append_int_noprefix(table_data, TPM_LOG_AREA_MINIMUM_SIZE, 4);
/* Log Area Start Address (LASA) */
log_addr_offset = table_data->len;
build_append_int_noprefix(table_data, 0, 8);
/* allocate/reserve space for TPM log area */
acpi_data_push(tcpalog, TPM_LOG_AREA_MINIMUM_SIZE);
bios_linker_loader_alloc(linker, ACPI_BUILD_TPMLOG_FILE, tcpalog, 1,
false /* high memory */);
/* 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);
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 + tcpa_start),
"TCPA", sizeof(*tcpa), 2, oem_id, oem_table_id);
acpi_table_end(linker, &table);
}
#endif

14
include/hw/acpi/acpi-defs.h
View File

@ -418,20 +418,6 @@ struct AcpiSratProcessorGiccAffinity {
typedef struct AcpiSratProcessorGiccAffinity AcpiSratProcessorGiccAffinity;
/*
* TCPA Description Table
*
* Following Level 00, Rev 00.37 of specs:
* http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
*/
struct Acpi20Tcpa {
ACPI_TABLE_HEADER_DEF /* ACPI common table header */
uint16_t platform_class;
uint32_t log_area_minimum_length;
uint64_t log_area_start_address;
} QEMU_PACKED;
typedef struct Acpi20Tcpa Acpi20Tcpa;
/* DMAR - DMA Remapping table r2.2 */
struct AcpiTableDmar {
ACPI_TABLE_HEADER_DEF