[PATCH v16 18/38] x86/efi: Secure Launch Resource Table EFI definitions header file

The Secure Launch EFI definitions are contained in the Secure Launch
Specification. The definitions are split out into a separate header
file for compilation purposes for EFI vs non-EFI environments in the
kernel.

The specification can be found here:
https://github.com/TrenchBoot/documentation/blob/master/specifications/secure-launch-specification.rst

Co-developed-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Ross Philipson <[email protected]>
---
 include/linux/slr_efi.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 include/linux/slr_efi.h

diff --git a/include/linux/slr_efi.h b/include/linux/slr_efi.h
new file mode 100644
index 000000000000..5de87a9b38aa
--- /dev/null
+++ b/include/linux/slr_efi.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * EFI Definitions for Secure Launch Resource Table
+ *
+ * See TrenchBoot Secure Launch kernel documentation for details.
+ *
+ * Copyright (c) 2026 Apertus Solutions, LLC
+ * Copyright (c) 2026, Oracle and/or its affiliates.
+ */
+
+#ifndef _LINUX_SLR_EFI_H
+#define _LINUX_SLR_EFI_H
+
+#include <linux/slr_table.h>
+
+#ifndef __ASSEMBLER__
+
+/* EFI Support */
+
+/* SLR table GUID for registering as an EFI Configuration Table (put this in efi.h if it becomes a standard) */
+#define SLR_TABLE_GUID			EFI_GUID(0x877a9b2a, 0x0385, 0x45d1, 0xa0, 0x34, 0x9d, 0xac, 0x9c, 0x9e, 0x56, 0x5f)
+
+/* Secure Launch EFI runtime protocol */
+#define EFI_SLAUNCH_PROTOCOL_GUID	EFI_GUID(0x534189e0, 0x6fde, 0x413d,  0xbe, 0x91, 0xcd, 0x4e, 0x8d, 0x67, 0x2f, 0xea)
+
+struct efi_slaunch_protocol {
+	efi_status_t
+	(__efiapi *setup_dlme)(struct efi_slaunch_protocol *this,
+			       u64 dlme_base,
+			       u64 dlme_header_offset,
+			       u64 dlme_table);
+
+	efi_status_t
+	(__efiapi *launch)(struct efi_slaunch_protocol *this);
+};
+typedef struct efi_slaunch_protocol efi_slaunch_protocol_t;
+
+#endif /* !__ASSEMBLER__ */
+
+#endif /* _LINUX_SLR_EFI_H */
-- 
2.47.3