diff options
author | Simon Glass <sjg@chromium.org> | 2020-09-22 21:45:32 +0300 |
---|---|---|
committer | Bin Meng <bmeng.cn@gmail.com> | 2020-09-25 06:27:23 +0300 |
commit | 9179c3571ce587e96b957d0da8f0e4dcabc8d293 (patch) | |
tree | 4d71d9f93963e9b6f3453e3ca065388bc40d2c6d /arch | |
parent | 4ff3591988a4aefad7bafc9a2ee8701cccf03d74 (diff) | |
download | u-boot-9179c3571ce587e96b957d0da8f0e4dcabc8d293.tar.xz |
acpi: tpm: Add a TPM2 table
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/lib/acpi_table.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 5876355afe..c31cc923c9 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -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); |