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diff --git a/sys/compat/linuxkpi/common/include/linux/efi.h b/sys/compat/linuxkpi/common/include/linux/efi.h
new file mode 100644
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/efi.h
@@ -0,0 +1,73 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _LINUX_EFI_H_
+#define _LINUX_EFI_H_
+
+#include <sys/param.h>
+#include <sys/linker.h>
+#include <sys/systm.h>
+
+#include <machine/md_var.h>
+#include <machine/metadata.h>
+
+#define EFI_BOOT 0
+
+static inline bool
+__efi_enabled(int feature)
+{
+#if defined(MODINFOMD_EFI_MAP) && !defined(__amd64__)
+ caddr_t kmdp;
+#endif
+ bool enabled = false;
+
+ switch (feature) {
+ case EFI_BOOT:
+#ifdef __amd64__
+ /* Use cached value on amd64 */
+ enabled = efi_boot;
+#elif defined(MODINFOMD_EFI_MAP)
+ kmdp = preload_search_by_type("elf kernel");
+ if (kmdp == NULL)
+ kmdp = preload_search_by_type("elf64 kernel");
+ enabled = preload_search_info(kmdp,
+ MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL;
+#endif
+ break;
+ default:
+ break;
+ }
+
+ return (enabled);
+}
+
+#define efi_enabled(x) ({ \
+ _Static_assert((x) == EFI_BOOT, "unsupported feature"); \
+ __efi_enabled(x); \
+})
+
+#endif /* _LINUX_EFI_H_ */

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