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// 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,
};
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