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arch/x86/acpi: Add TPM2 table support 

* Distinguish between TPM 1.2 and 2.0
  ACPI table support
* Add TPM2 table support for TIS interface only

Change-Id: I030c7ea744bcfe61ebef8d66d1295273b5dccda5
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/29181
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
This commit is contained in:
Philipp Deppenwiese 2018-10-18 15:39:34 +02:00 committed by Patrick Georgi
parent 3c37b5a682
commit 296164e0fe
2 changed files with 59 additions and 7 deletions
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57
src/arch/x86/acpi.c
View File

@ -308,6 +308,33 @@ static void acpi_create_tcpa(acpi_tcpa_t *tcpa)
header->checksum = acpi_checksum((void *)tcpa, header->length);
}
static void acpi_create_tpm2(acpi_tpm2_t *tpm2)
{
acpi_header_t *header = &(tpm2->header);
memset((void *)tpm2, 0, sizeof(acpi_tpm2_t));
/* Fill out header fields. */
memcpy(header->signature, "TPM2", 4);
memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_tpm2_t);
header->revision = get_acpi_table_revision(TPM2);
/* Hard to detect for coreboot. Just set it to 0 */
tpm2->platform_class = 0;
/* Must be set to 0 for TIS interface support */
tpm2->control_area = 0;
/* coreboot only supports the TIS interface driver. */
tpm2->start_method = 6;
memset(tpm2->msp, 0, sizeof(tpm2->msp));
/* Calculate checksum. */
header->checksum = acpi_checksum((void *)tpm2, header->length);
}
static void acpi_ssdt_write_cbtable(void)
{
const struct cbmem_entry *cbtable;
@ -1030,6 +1057,7 @@ unsigned long write_acpi_tables(unsigned long start)
acpi_header_t *dsdt_file, *dsdt;
acpi_mcfg_t *mcfg;
acpi_tcpa_t *tcpa;
acpi_tpm2_t *tpm2;
acpi_madt_t *madt;
struct device *dev;
unsigned long fw;
@ -1163,13 +1191,26 @@ unsigned long write_acpi_tables(unsigned long start)
acpi_add_table(rsdp, mcfg);
}
printk(BIOS_DEBUG, "ACPI: * TCPA\n");
tcpa = (acpi_tcpa_t *) current;
acpi_create_tcpa(tcpa);
if (tcpa->header.length >= sizeof(acpi_tcpa_t)) {
current += tcpa->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, tcpa);
if (IS_ENABLED(CONFIG_TPM1)) {
printk(BIOS_DEBUG, "ACPI: * TCPA\n");
tcpa = (acpi_tcpa_t *) current;
acpi_create_tcpa(tcpa);
if (tcpa->header.length >= sizeof(acpi_tcpa_t)) {
current += tcpa->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, tcpa);
}
}
if (IS_ENABLED(CONFIG_TPM2)) {
printk(BIOS_DEBUG, "ACPI: * TPM2\n");
tpm2 = (acpi_tpm2_t *) current;
acpi_create_tpm2(tpm2);
if (tpm2->header.length >= sizeof(acpi_tpm2_t)) {
current += tpm2->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, tpm2);
}
}
printk(BIOS_DEBUG, "ACPI: * MADT\n");
@ -1288,6 +1329,8 @@ int get_acpi_table_revision(enum acpi_tables table)
return 1;
case TCPA:
return 2;
case TPM2:
return 4;
case SSDT: /* ACPI 1.0/2.0: ?, ACPI 3.0/4.0: 2 */
return 2;
case SRAT: /* ACPI 1.0: N/A, 2.0: 1, 3.0: 2, 4.0: 3 */

9
src/arch/x86/include/arch/acpi.h
View File

@ -191,6 +191,15 @@ typedef struct acpi_tcpa {
u64 lasa;
} __packed acpi_tcpa_t;
typedef struct acpi_tpm2 {
struct acpi_table_header header;
u16 platform_class;
u8 reserved[2];
u64 control_area;
u32 start_method;
u8 msp[12];
} __packed acpi_tpm2_t;
typedef struct acpi_mcfg_mmconfig {
u32 base_address;
u32 base_reserved;