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