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acpi: tpm: Add a TPM1 table

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This provides information about a v1 TPM in the system. Generate this
table if the TPM is present.

Add a required new bloblist type and correct the header order of one
header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-09-22 12:45:33 -06:00 committed by Bin Meng
parent 9179c3571c
commit 77bb1c69df
3 changed files with 61 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
arch/x86/lib/acpi_table.c
View File

@ -215,6 +215,47 @@ static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
header->checksum = table_compute_checksum((void *)mcfg, header->length);
}
/**
* acpi_create_tcpa() - Create a TCPA table
*
* @tcpa: Pointer to place to put table
*
* Trusted Computing Platform Alliance Capabilities Table
* TCPA PC Specific Implementation SpecificationTCPA is defined in the PCI
* Firmware Specification 3.0
*/
static int acpi_create_tcpa(struct acpi_tcpa *tcpa)
{
struct acpi_table_header *header = &tcpa->header;
u32 current = (u32)tcpa + sizeof(struct acpi_tcpa);
int size = 0x10000; /* Use this as the default size */
void *log;
int ret;
if (!CONFIG_IS_ENABLED(BLOBLIST))
return -ENXIO;
memset(tcpa, '\0', sizeof(struct acpi_tcpa));
/* Fill out header fields */
acpi_fill_header(header, "TCPA");
header->length = sizeof(struct acpi_tcpa);
header->revision = 1;
ret = bloblist_ensure_size_ret(BLOBLISTT_TCPA_LOG, &size, &log);
if (ret)
return log_msg_ret("blob", ret);
tcpa->platform_class = 0;
tcpa->laml = size;
tcpa->lasa = (ulong)log;
/* (Re)calculate length and checksum */
header->length = current - (u32)tcpa;
header->checksum = table_compute_checksum((void *)tcpa, header->length);
return 0;
}
static int get_tpm2_log(void **ptrp, int *sizep)
{
const int tpm2_default_log_len = 0x10000;
@ -457,11 +498,13 @@ ulong write_acpi_tables(ulong start_addr)
struct acpi_fadt *fadt;
struct acpi_table_header *ssdt;
struct acpi_mcfg *mcfg;
struct acpi_tcpa *tcpa;
struct acpi_madt *madt;
struct acpi_csrt *csrt;
struct acpi_spcr *spcr;
void *start;
ulong addr;
int ret;
int i;
start = map_sysmem(start_addr, 0);
@ -560,7 +603,6 @@ ulong write_acpi_tables(ulong start_addr)
if (IS_ENABLED(CONFIG_TPM_V2)) {
struct acpi_tpm2 *tpm2;
int ret;
debug("ACPI: * TPM2\n");
tpm2 = (struct acpi_tpm2 *)ctx->current;
@ -579,6 +621,16 @@ ulong write_acpi_tables(ulong start_addr)
acpi_inc_align(ctx, madt->header.length);
acpi_add_table(ctx, madt);
debug("ACPI: * TCPA\n");
tcpa = (struct acpi_tcpa *)ctx->current;
ret = acpi_create_tcpa(tcpa);
if (ret) {
log_warning("Failed to create TCPA table (err=%d)\n", ret);
} else {
acpi_inc_align(ctx, tcpa->header.length);
acpi_add_table(ctx, tcpa);
}
debug("ACPI: * CSRT\n");
csrt = ctx->current;
if (!acpi_create_csrt(csrt)) {

7
include/acpi/acpi_table.h
View File

@ -104,6 +104,13 @@ struct __packed acpi_tpm2 {
u64 lasa;
};
struct __packed acpi_tcpa {
struct acpi_table_header header;
u16 platform_class;
u32 laml;
u64 lasa;
};
/* FADT Preferred Power Management Profile */
enum acpi_pm_profile {
ACPI_PM_UNSPECIFIED = 0,

1
include/bloblist.h
View File

@ -34,6 +34,7 @@ enum bloblist_tag_t {
BLOBLISTT_ACPI_GNVS,
BLOBLISTT_INTEL_VBT, /* Intel Video-BIOS table */
BLOBLISTT_TPM2_TCG_LOG, /* TPM v2 log space */
BLOBLISTT_TCPA_LOG, /* TPM log space */
};
/**