brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

acpi: tpm: Add a TPM2 table

Browse Source 
This provides information about a v2 TPM in the system. Generate this
table if the TPM is present.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-09-22 12:45:32 -06:00 committed by Bin Meng
parent 4ff3591988
commit 9179c3571c
3 changed files with 86 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
arch/x86/lib/acpi_table.c
View File

@ -7,6 +7,7 @@
*/
#include <common.h>
#include <bloblist.h>
#include <cpu.h>
#include <dm.h>
#include <log.h>
@ -214,6 +215,64 @@ static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
header->checksum = table_compute_checksum((void *)mcfg, header->length);
}
static int get_tpm2_log(void **ptrp, int *sizep)
{
const int tpm2_default_log_len = 0x10000;
int size;
int ret;
*sizep = 0;
size = tpm2_default_log_len;
ret = bloblist_ensure_size_ret(BLOBLISTT_TPM2_TCG_LOG, &size, ptrp);
if (ret)
return log_msg_ret("blob", ret);
*sizep = size;
return 0;
}
static int acpi_create_tpm2(struct acpi_tpm2 *tpm2)
{
struct acpi_table_header *header = &tpm2->header;
int tpm2_log_len;
void *lasa;
int ret;
memset((void *)tpm2, 0, sizeof(struct acpi_tpm2));
/*
* Some payloads like SeaBIOS depend on log area to use TPM2.
* Get the memory size and address of TPM2 log area or initialize it.
*/
ret = get_tpm2_log(&lasa, &tpm2_log_len);
if (ret)
return ret;
/* Fill out header fields. */
acpi_fill_header(header, "TPM2");
memcpy(header->aslc_id, ASLC_ID, 4);
header->length = sizeof(struct acpi_tpm2);
header->revision = acpi_get_table_revision(ACPITAB_TPM2);
/* Hard to detect for coreboot. Just set it to 0 */
tpm2->platform_class = 0;
/* Must be set to 0 for FIFO-interface support */
tpm2->control_area = 0;
tpm2->start_method = 6;
memset(tpm2->msp, 0, sizeof(tpm2->msp));
/* Fill the log area size and start address fields. */
tpm2->laml = tpm2_log_len;
tpm2->lasa = (uintptr_t)lasa;
/* Calculate checksum. */
header->checksum = table_compute_checksum((void *)tpm2, header->length);
return 0;
}
__weak u32 acpi_fill_csrt(u32 current)
{
return 0;
@ -499,6 +558,21 @@ ulong write_acpi_tables(ulong start_addr)
acpi_inc_align(ctx, mcfg->header.length);
acpi_add_table(ctx, mcfg);
if (IS_ENABLED(CONFIG_TPM_V2)) {
struct acpi_tpm2 *tpm2;
int ret;
debug("ACPI: * TPM2\n");
tpm2 = (struct acpi_tpm2 *)ctx->current;
ret = acpi_create_tpm2(tpm2);
if (!ret) {
acpi_inc_align(ctx, tpm2->header.length);
acpi_add_table(ctx, tpm2);
} else {
log_warning("TPM2 table creation failed\n");
}
}
debug("ACPI: * MADT\n");
madt = ctx->current;
acpi_create_madt(madt);

11
include/acpi/acpi_table.h
View File

@ -93,6 +93,17 @@ struct __packed acpi_hpet {
u8 attributes;
};
struct __packed acpi_tpm2 {
struct acpi_table_header header;
u16 platform_class;
u8 reserved[2];
u64 control_area;
u32 start_method;
u8 msp[12];
u32 laml;
u64 lasa;
};
/* FADT Preferred Power Management Profile */
enum acpi_pm_profile {
ACPI_PM_UNSPECIFIED = 0,

1
include/bloblist.h
View File

@ -33,6 +33,7 @@ enum bloblist_tag_t {
*/
BLOBLISTT_ACPI_GNVS,
BLOBLISTT_INTEL_VBT, /* Intel Video-BIOS table */
BLOBLISTT_TPM2_TCG_LOG, /* TPM v2 log space */
};
/**