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acpi: create separate file for TCPA log 

Create the TCPA log in a separate file rather than allocating
ACPI table memory for it.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Stefan Berger 2014-10-24 13:21:04 -04:00 committed by Michael S. Tsirkin
parent 9047579161
commit 42a5b30844
1 changed files with 15 additions and 7 deletions
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22
hw/i386/acpi-build.c
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@ -249,6 +249,7 @@ static void acpi_get_pci_info(PcPciInfo *info)
#define ACPI_BUILD_TABLE_FILE "etc/acpi/tables"
#define ACPI_BUILD_RSDP_FILE "etc/acpi/rsdp"
#define ACPI_BUILD_TPMLOG_FILE "etc/tpm/log"
static void
build_header(GArray *linker, GArray *table_data,
@ -1214,27 +1215,28 @@ build_hpet(GArray *table_data, GArray *linker)
}
static void
build_tpm_tcpa(GArray *table_data, GArray *linker)
build_tpm_tcpa(GArray *table_data, GArray *linker, GArray *tcpalog)
{
Acpi20Tcpa *tcpa = acpi_data_push(table_data, sizeof *tcpa);
/* the log area will come right after the TCPA table */
uint64_t log_area_start_address = acpi_data_len(table_data);
uint64_t log_area_start_address = acpi_data_len(tcpalog);
tcpa->platform_class = cpu_to_le16(TPM_TCPA_ACPI_CLASS_CLIENT);
tcpa->log_area_minimum_length = cpu_to_le32(TPM_LOG_AREA_MINIMUM_SIZE);
tcpa->log_area_start_address = cpu_to_le64(log_area_start_address);
bios_linker_loader_alloc(linker, ACPI_BUILD_TPMLOG_FILE, 1,
false /* high memory */);
/* log area start address to be filled by Guest linker */
bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
ACPI_BUILD_TABLE_FILE,
ACPI_BUILD_TPMLOG_FILE,
table_data, &tcpa->log_area_start_address,
sizeof(tcpa->log_area_start_address));
build_header(linker, table_data,
(void *)tcpa, "TCPA", sizeof(*tcpa), 2);
/* now only get the log area and with that modify table_data */
acpi_data_push(table_data, TPM_LOG_AREA_MINIMUM_SIZE);
acpi_data_push(tcpalog, TPM_LOG_AREA_MINIMUM_SIZE);
}
static void
@ -1485,6 +1487,7 @@ typedef
struct AcpiBuildTables {
GArray *table_data;
GArray *rsdp;
GArray *tcpalog;
GArray *linker;
} AcpiBuildTables;
@ -1492,6 +1495,7 @@ static inline void acpi_build_tables_init(AcpiBuildTables *tables)
{
tables->rsdp = g_array_new(false, true /* clear */, 1);
tables->table_data = g_array_new(false, true /* clear */, 1);
tables->tcpalog = g_array_new(false, true /* clear */, 1);
tables->linker = bios_linker_loader_init();
}
@ -1503,6 +1507,7 @@ static inline void acpi_build_tables_cleanup(AcpiBuildTables *tables, bool mfre)
}
g_array_free(tables->rsdp, mfre);
g_array_free(tables->table_data, mfre);
g_array_free(tables->tcpalog, mfre);
}
typedef
@ -1612,7 +1617,7 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
}
if (misc.has_tpm) {
acpi_add_table(table_offsets, tables->table_data);
build_tpm_tcpa(tables->table_data, tables->linker);
build_tpm_tcpa(tables->table_data, tables->linker, tables->tcpalog);
acpi_add_table(table_offsets, tables->table_data);
build_tpm_ssdt(tables->table_data, tables->linker);
@ -1778,6 +1783,9 @@ void acpi_setup(PcGuestInfo *guest_info)
acpi_add_rom_blob(NULL, tables.linker, "etc/table-loader");
fw_cfg_add_file(guest_info->fw_cfg, ACPI_BUILD_TPMLOG_FILE,
tables.tcpalog->data, acpi_data_len(tables.tcpalog));
/*
* RSDP is small so it's easy to keep it immutable, no need to
* bother with ROM blobs.