Support libpldm as Zephyr module

include/libpldm/base.h

@@ -6,10 +6,10 @@
 extern "C" {
 #endif
 
+#include <libpldm/byteorder.h>
 #include <libpldm/compiler.h>
 #include <libpldm/pldm_types.h>
 
-#include <asm/byteorder.h>
 #include <stdalign.h>
 #include <stdbool.h>
 #include <stddef.h>
@@ -203,12 +203,6 @@ struct pldm_msg_hdr {
 	uint8_t command; //!< PLDM command code
 } __attribute__((packed));
 
-// Macros for byte-swapping variables in-place
-#define HTOLE32(X) ((X) = htole32(X))
-#define HTOLE16(X) ((X) = htole16(X))
-#define LE32TOH(X) ((X) = le32toh(X))
-#define LE16TOH(X) ((X) = le16toh(X))
-
 /** @struct pldm_msg
  *
  * Structure representing PLDM message

include/libpldm/byteorder.h

@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
+#ifndef BYTEORDER_H
+#define BYTEORDER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __ZEPHYR__
+#include <zephyr/sys/byteorder.h>
+
+#define HTOLE32(X) ((X) = sys_cpu_to_le32(X))
+#define HTOLE16(X) ((X) = sys_cpu_to_le16(X))
+#define LE32TOH(X) ((X) = sys_le32_to_cpu(X))
+#define LE16TOH(X) ((X) = sys_le16_to_cpu(X))
+
+#ifdef CONFIG_LITTLE_ENDIAN
+#define __LITTLE_ENDIAN_BITFIELD
+#elif defined(CONFIG_BIG_ENDIAN)
+#define __BIG_ENDIAN_BITFIELD
+#endif
+
+#else
+#include <asm/byteorder.h>
+
+#define HTOLE32(X) ((X) = htole32(X))
+#define HTOLE16(X) ((X) = htole16(X))
+#define LE32TOH(X) ((X) = le32toh(X))
+#define LE16TOH(X) ((X) = le16toh(X))
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

include/libpldm/compiler.h

@@ -34,4 +34,10 @@
 #define LIBPLDM_CC_NONNULL
 #endif
 
+#ifdef __ZEPHYR__
+
+#define EUCLEAN 117
+
+#endif
+
 #endif

include/libpldm/file.h

@@ -8,7 +8,6 @@ extern "C" {
 
 #include <libpldm/pldm_types.h>
 
-#include <asm/byteorder.h>
 #include <stddef.h>
 #include <stdint.h>
 

include/libpldm/fru.h

@@ -8,7 +8,6 @@ extern "C" {
 
 #include <libpldm/base.h>
 
-#include <asm/byteorder.h>
 #include <stddef.h>
 #include <stdint.h>
 

src/compiler.h

@@ -10,6 +10,21 @@
 
 #include <assert.h>
 
+#ifdef __ZEPHYR__
+#include <zephyr/toolchain.h>
+
+#if !defined(__cplusplus) || __cplusplus < 201103L
+
+#ifndef static_assert
+#define static_assert BUILD_ASSERT
+#endif /* static_assert */
+
+#endif /* !defined(__cplusplus) || __cplusplus < 201103L */
+
+#define SSIZE_MAX INT_MAX
+
+#endif /* __ZEPHYR__ */
+
 static struct {
 	static_assert(__has_attribute(always_inline),
 		      "`always_inline` attribute is required");

src/dsp/bios_table.c

@@ -14,6 +14,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "compiler.h"
+
 #define POINTER_CHECK(pointer)                                                 \
 	do {                                                                   \
 		if ((pointer) == NULL)                                         \

zephyr/CMakeLists.txt

@@ -0,0 +1,56 @@
+# Copyright (c) 2026 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if(CONFIG_PLDM)
+	set(PLDM_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/..)
+
+	zephyr_interface_library_named(pldm)
+	zephyr_include_directories(${PLDM_ROOT}/include)
+	zephyr_include_directories(${PLDM_ROOT}/src)
+
+	zephyr_library_named(modules_pldm)
+	zephyr_library_link_libraries(pldm)
+
+
+	# While we follow what is done in the meson.build and mark all symbols as hidden
+	# by default, that is somewhat useless for Zephyr, as everything is compiled together.
+	# Do this anyway so visibility attributes are properly set. One could enforce
+	# them on Zephyr during post-build.
+	set_target_properties(modules_pldm PROPERTIES C_VISIBILITY_PRESET hidden)
+	set_target_properties(modules_pldm PROPERTIES CXX_VISIBILITY_PRESET hidden)
+
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_STABLE=__attribute__\(\(visibility\("default"\)\)\) _GNU_SOURCE)
+
+if (CONFIG_PLDM_ABI_TESTING)
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_TESTING=__attribute__\(\(visibility\("default"\)\)\))
+else()
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_TESTING= )
+endif()
+
+if (CONFIG_PLDM_ABI_DEPRECATED)
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_DEPRECATED=__attribute__\(\(visibility\("default"\)\)\))
+else()
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_DEPRECATED= )
+endif()
+
+if (CONFIG_PLDM_ABI_DEPRECATED_UNSAFE)
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_DEPRECATED_UNSAFE=__attribute__\(\(visibility\("default"\)\)\))
+else()
+	target_compile_definitions(modules_pldm PUBLIC LIBPLDM_ABI_DEPRECATED_UNSAFE= )
+endif()
+
+	zephyr_library_sources(
+		${PLDM_ROOT}/src/utils.c
+		${PLDM_ROOT}/src/responder.c
+
+		${PLDM_ROOT}/src/dsp/base.c
+		${PLDM_ROOT}/src/dsp/bios.c
+		${PLDM_ROOT}/src/dsp/bios_table.c
+		${PLDM_ROOT}/src/dsp/firmware_update.c
+		${PLDM_ROOT}/src/dsp/fru.c
+		${PLDM_ROOT}/src/dsp/pdr.c
+		${PLDM_ROOT}/src/dsp/platform.c
+	)
+
+endif()

zephyr/Kconfig.pldm

@@ -0,0 +1,27 @@
+# Copyright (c) 2026 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config PLDM
+	bool "PLDM library"
+	help
+		Enable PLDM support
+
+if PLDM
+
+config PLDM_ABI_TESTING
+	bool "PLDM ABI testing"
+	help
+		Enable PLDM testing features ABI
+
+config PLDM_ABI_DEPRECATED
+	bool "PLDM ABI deprecated"
+	help
+		Enable PLDM deprecated features ABI
+
+config PLDM_ABI_DEPRECATED_UNSAFE
+	bool "PLDM ABI deprecated unsafe"
+	help
+		Enable PLDM deprecated unsafe features ABI
+
+endif

zephyr/module.yml

@@ -0,0 +1,4 @@
+name: libpldm
+build:
+  cmake: zephyr/
+  kconfig: zephyr/Kconfig.pldm