123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * efi_selftest_devicepath
- *
- * Copyright (c) 2020 Heinrich Schuchardt <xypron.glpk@gmx.de>
- *
- * Test the EFI_TCG2_PROTOCOL
- */
- #include <efi_selftest.h>
- #include <efi_tcg2.h>
- static struct efi_boot_services *boottime;
- static const efi_guid_t guid_tcg2 = EFI_TCG2_PROTOCOL_GUID;
- /**
- * efi_st_tcg2_setup() - setup test
- *
- * @handle: handle of the loaded image
- * @systable: system table
- * @return: status code
- */
- static int efi_st_tcg2_setup(const efi_handle_t img_handle,
- const struct efi_system_table *systable)
- {
- boottime = systable->boottime;
- return EFI_ST_SUCCESS;
- }
- /**
- * efi_st_tcg2_execute() - execute test
- *
- * Call the GetCapability service of the EFI_TCG2_PROTOCOL.
- *
- * Return: status code
- */
- static int efi_st_tcg2_execute(void)
- {
- struct efi_tcg2_protocol *tcg2;
- struct efi_tcg2_boot_service_capability capability;
- efi_status_t ret;
- ret = boottime->locate_protocol(&guid_tcg2, NULL, (void **)&tcg2);
- if (ret != EFI_SUCCESS) {
- efi_st_error("TCG2 protocol is not available.\n");
- return EFI_ST_FAILURE;
- }
- capability.size = sizeof(struct efi_tcg2_boot_service_capability) - 1;
- ret = tcg2->get_capability(tcg2, &capability);
- if (ret != EFI_BUFFER_TOO_SMALL) {
- efi_st_error("tcg2->get_capability on small buffer failed\n");
- return EFI_ST_FAILURE;
- }
- capability.size = sizeof(struct efi_tcg2_boot_service_capability);
- ret = tcg2->get_capability(tcg2, &capability);
- if (ret != EFI_SUCCESS) {
- efi_st_error("tcg2->get_capability failed\n");
- return EFI_ST_FAILURE;
- }
- if (!capability.tpm_present_flag) {
- efi_st_error("TPM not present\n");
- return EFI_ST_FAILURE;
- }
- efi_st_printf("TPM supports 0x%.8x event logs\n",
- capability.supported_event_logs);
- return EFI_ST_SUCCESS;
- }
- EFI_UNIT_TEST(tcg2) = {
- .name = "tcg2",
- .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
- .execute = efi_st_tcg2_execute,
- .setup = efi_st_tcg2_setup,
- };
|