core: if the bootloader supports it, determine firmware and boot loader delay

This allows us to print simple performance data of all parts of the boot now:

- firmware
- boot loader
- kernel
- initrd
- userspace

This only works for bootloaders which support passing TSC data via EFI
variables. As of now that's only gummiboot.

1 files changed, 30 insertions, 0 deletions

diff --git a/src/shared/efivars.h b/src/shared/efivars.h
new file mode 100644
index 0000000000..7b65c9264e
--- /dev/null
+++ b/src/shared/efivars.h
@@ -0,0 +1,30 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+#include "sd-id128.h"
+
+int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
+int efi_get_boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader);