libspdm: Initial support for libspdm

libspdm is DMTF's Reference Implementation of SPDM, it's a library that
can be used to implement a SPDM requester or responder in userspace.

This patch adds support for building libspdm, which can then be used to
build applications depending on libspdm.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/libspdm/libspdm_3.6.0.bb

@@ -0,0 +1,76 @@
+SUMMARY = "DMTF's Reference Implementation of SPDM"
+DESCRIPTION = "libspdm is a reference implementation of the DMTF’s Security Protocols and \
+Data Models (SPDM). This is used to enable authentication, attestation and key exchange to \
+assist in providing infrastructure security enablement"
+HOMEPAGE = "https://github.com/DMTF/libspdm"
+BUGTRACKER = "https://github.com/DMTF/libspdm/issues"
+LICENSE = "BSD-3-Clause"
+LIC_FILES_CHKSUM = "file://LICENSE.md;md5=8f9b59a81a88da8e812af43728b72dd7"
+
+DEPENDS = "openssl"
+
+SRC_URI = "git://github.com/DMTF/libspdm.git;branch=main;protocol=https"
+SRCREV = "5ebe5e3946b9439928fa3a7548268c29cccc1b16"
+
+S = "${WORKDIR}/git"
+
+inherit cmake
+
+LIBSPDM_CFLAGS = "\
+	${TARGET_CFLAGS} \
+	-DLIBSPDM_ENABLE_CAPABILITY_EVENT_CAP=0 \
+	-DLIBSPDM_ENABLE_CAPABILITY_MEL_CAP=0 \
+	-DLIBSPDM_ENABLE_CAPABILITY_GET_KEY_PAIR_INFO_CAP=0 \
+	-DLIBSPDM_ENABLE_CAPABILITY_SET_KEY_PAIR_INFO_CAP=0 \
+	-DLIBSPDM_HAL_PASS_SPDM_CONTEXT=1 \
+	"
+
+def get_spdm_multiarch(bb, d):
+    target_arch = d.getVar('TARGET_ARCH')
+    multiarch_options = {
+        "x86_64":  "x64",
+        "i586":    "ia32",
+        "i686":    "ia32",
+        "arm":     "arm",
+        "aarch64": "aarch64",
+        "riscv32": "riscv32",
+        "riscv64": "riscv64",
+    }
+
+    if target_arch in multiarch_options :
+        return multiarch_options[target_arch]
+
+    bb.error("unsupported architecture '%s'" % target_arch)
+
+EXTRA_OECMAKE += "\
+    -DARCH=${@get_spdm_multiarch(bb, d)} \
+	-DTOOLCHAIN=NONE \
+	-DTARGET=Release \
+	-DCRYPTO=openssl \
+	-DENABLE_BINARY_BUILD=1 \
+	-DCOMPILED_LIBCRYPTO_PATH=${libdir} \
+	-DCOMPILED_LIBSSL_PATH=${libdir} \
+	-DDISABLE_TESTS=1 \
+	-DDISABLE_EDDSA=1 \
+	"
+
+do_install () {
+    install -d ${D}/${libdir}
+    install -m 0644 lib/* ${D}/${libdir}/
+
+    install -d ${D}/${includedir}/${BPN}/
+    cp -rf ${S}/include/* ${D}/${includedir}/${BPN}/
+
+    install -d ${D}/${includedir}/${BPN}/os_stub/spdm_crypt_ext_lib
+    cp -rf ${S}/os_stub/spdm_crypt_ext_lib/*.h ${D}/${includedir}/${BPN}/os_stub/spdm_crypt_ext_lib/
+}
+
+FILES:${PN} += "${libdir}/*.a"
+FILES:${PN} += "${includedir}/${BPN}/*.h"
+FILES:${PN} += "${includedir}/${BPN}/os_stub/spdm_crypt_ext_lib/*.h"
+
+COMPATIBLE_HOST:powerpc = "null"
+COMPATIBLE_HOST:powerpc64 = "null"
+COMPATIBLE_HOST:mipsarchn32 = "null"
+
+BBCLASSEXTEND = "native nativesdk"