diff --git a/include/efi_loader.h b/include/efi_loader.h index 6f61e9faac..32cb8d0f1e 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -499,6 +499,7 @@ efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size); efi_status_t efi_init_variables(void); /* Notify ExitBootServices() is called */ void efi_variables_boot_exit_notify(void); +efi_status_t efi_tcg2_notify_exit_boot_services_failed(void); /* Measure efi application invocation */ efi_status_t efi_tcg2_measure_efi_app_invocation(void); /* Measure efi application exit */ diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 13ab139222..f0283b539e 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -2182,6 +2182,11 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, efi_set_watchdog(0); WATCHDOG_RESET(); out: + if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) { + if (ret != EFI_SUCCESS) + efi_tcg2_notify_exit_boot_services_failed(); + } + return EFI_EXIT(ret); } diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c index ed71337780..c6f2e48106 100644 --- a/lib/efi_loader/efi_tcg2.c +++ b/lib/efi_loader/efi_tcg2.c @@ -1506,6 +1506,67 @@ efi_status_t efi_tcg2_measure_efi_app_exit(void) return ret; } +/** + * efi_tcg2_notify_exit_boot_services() - ExitBootService callback + * + * @event: callback event + * @context: callback context + */ +static void EFIAPI +efi_tcg2_notify_exit_boot_services(struct efi_event *event, void *context) +{ + efi_status_t ret; + struct udevice *dev; + + EFI_ENTRY("%p, %p", event, context); + + ret = platform_get_tpm2_device(&dev); + if (ret != EFI_SUCCESS) + goto out; + + ret = tcg2_measure_event(dev, 5, EV_EFI_ACTION, + strlen(EFI_EXIT_BOOT_SERVICES_INVOCATION), + (u8 *)EFI_EXIT_BOOT_SERVICES_INVOCATION); + if (ret != EFI_SUCCESS) + goto out; + + ret = tcg2_measure_event(dev, 5, EV_EFI_ACTION, + strlen(EFI_EXIT_BOOT_SERVICES_SUCCEEDED), + (u8 *)EFI_EXIT_BOOT_SERVICES_SUCCEEDED); + +out: + EFI_EXIT(ret); +} + +/** + * efi_tcg2_notify_exit_boot_services_failed() + * - notify ExitBootServices() is failed + * + * Return: status code + */ +efi_status_t efi_tcg2_notify_exit_boot_services_failed(void) +{ + struct udevice *dev; + efi_status_t ret; + + ret = platform_get_tpm2_device(&dev); + if (ret != EFI_SUCCESS) + goto out; + + ret = tcg2_measure_event(dev, 5, EV_EFI_ACTION, + strlen(EFI_EXIT_BOOT_SERVICES_INVOCATION), + (u8 *)EFI_EXIT_BOOT_SERVICES_INVOCATION); + if (ret != EFI_SUCCESS) + goto out; + + ret = tcg2_measure_event(dev, 5, EV_EFI_ACTION, + strlen(EFI_EXIT_BOOT_SERVICES_FAILED), + (u8 *)EFI_EXIT_BOOT_SERVICES_FAILED); + +out: + return ret; +} + /** * tcg2_measure_secure_boot_variable() - measure secure boot variables * @@ -1584,6 +1645,7 @@ efi_status_t efi_tcg2_register(void) { efi_status_t ret = EFI_SUCCESS; struct udevice *dev; + struct efi_event *event; ret = platform_get_tpm2_device(&dev); if (ret != EFI_SUCCESS) { @@ -1608,6 +1670,14 @@ efi_status_t efi_tcg2_register(void) goto fail; } + ret = efi_create_event(EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_CALLBACK, + efi_tcg2_notify_exit_boot_services, NULL, + NULL, &event); + if (ret != EFI_SUCCESS) { + tcg2_uninit(); + goto fail; + } + ret = tcg2_measure_secure_boot_variable(dev); if (ret != EFI_SUCCESS) { tcg2_uninit();