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 ---
arch/x86/lib/acpi_table.c | 52 ++++++++++++++++++++++++++++++++++++++- include/acpi_table.h | 7 ++++++ include/bloblist.h | 1 + 3 files changed, 59 insertions(+), 1 deletion(-)
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 1d12e58508..564c5167c9 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -277,6 +277,45 @@ 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; + + 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; @@ -737,11 +776,13 @@ 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); @@ -829,7 +870,6 @@ 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; @@ -848,6 +888,16 @@ 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; acpi_create_csrt(csrt); diff --git a/include/acpi_table.h b/include/acpi_table.h index 3d51942d32..b5ba37cd28 100644 --- a/include/acpi_table.h +++ b/include/acpi_table.h @@ -115,6 +115,13 @@ 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, diff --git a/include/bloblist.h b/include/bloblist.h index d8dccf91fc..d7661bc111 100644 --- a/include/bloblist.h +++ b/include/bloblist.h @@ -34,6 +34,7 @@ enum bloblist_tag_t { */ BLOBLISTT_ACPI_GNVS, BLOBLISTT_TPM2_TCG_LOG, /* TPM v2 log space */ + BLOBLISTT_TCPA_LOG, /* TPM log space */ };
/**