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charset="utf-8" In Makefile, we use $(SRCARCH) to access target arch's uapi include. This allow us to obtain the definition of 'struct user_pt_regs' for "ptrace= .h" header file. Thus, it is no longer necessary to execute "make headers_install". Signed-off-by: Lin Yikai --- tools/testing/selftests/bpf/Makefile | 6 +++++ tools/testing/selftests/bpf/README.rst | 11 +++++++- tools/testing/selftests/bpf/vmtest.sh | 37 +++++++++++++++++++++----- 3 files changed, 47 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests= /bpf/Makefile index c120617b64ad..3f0f9a171651 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -444,6 +444,7 @@ CLANG_TARGET_ARCH =3D --target=3D$(notdir $(CROSS_COMPI= LE:%-=3D%)) endif =20 CLANG_SYS_INCLUDES =3D $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARC= H)) + BPF_CFLAGS =3D -g -Wall -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR) \ -I$(abspath $(OUTPUT)/../usr/include) \ @@ -452,6 +453,11 @@ BPF_CFLAGS =3D -g -Wall -Werror -D__TARGET_ARCH_$(SRCA= RCH) $(MENDIAN) \ =20 CLANG_CFLAGS =3D $(CLANG_SYS_INCLUDES) =20 +ifneq ($(CROSS_COMPILE),) +src_uapi_dir :=3D $(srctree)/arch/$(SRCARCH)/include/uapi +BPF_CFLAGS +=3D -I$(src_uapi_dir) +endif + $(OUTPUT)/test_l4lb_noinline.o: BPF_CFLAGS +=3D -fno-inline $(OUTPUT)/test_xdp_noinline.o: BPF_CFLAGS +=3D -fno-inline =20 diff --git a/tools/testing/selftests/bpf/README.rst b/tools/testing/selftes= ts/bpf/README.rst index 9b974e425af3..41ab23bd3277 100644 --- a/tools/testing/selftests/bpf/README.rst +++ b/tools/testing/selftests/bpf/README.rst @@ -79,13 +79,22 @@ In case of linker errors when running selftests, try us= ing static linking: =20 $ LDLIBS=3D-static PKG_CONFIG=3D'pkg-config --static' vmtest.sh =20 +If you want to make corss-compile, such as compile arm64 on x86_64, you ca= n try: + +.. code-block:: console + + $ export PATH=3D$PATH:{The corss-compile's path}/bin + $ export ARCH=3Darm64 + $ export CROSS_COMPILE=3Daarch64-linux-gnu- + $ LDLIBS=3D-static vmtest.sh + .. note:: Some distros may not support static linking. =20 .. note:: The script uses pahole and clang based on host environment setti= ng. If you want to change pahole and llvm, you can change `PATH` env= ironment variable in the beginning of script. =20 -.. note:: The script currently only supports x86_64 and s390x architecture= s. +.. note:: The script currently only supports x86_64, s390x and arm64 archi= tectures. =20 Additional information about selftest failures are documented here. diff --git a/tools/testing/selftests/bpf/vmtest.sh b/tools/testing/selftest= s/bpf/vmtest.sh index 65d14f3bbe30..c7461ed496ab 100755 --- a/tools/testing/selftests/bpf/vmtest.sh +++ b/tools/testing/selftests/bpf/vmtest.sh @@ -4,11 +4,11 @@ set -u set -e =20 -# This script currently only works for x86_64 and s390x, as +# This script currently only works for x86_64, s390x and arm64, as # it is based on the VM image used by the BPF CI, which is # available only for these architectures. -ARCH=3D"$(uname -m)" -case "${ARCH}" in +HOST_ARCH=3D"$(uname -m)" +case "${HOST_ARCH}" in s390x) QEMU_BINARY=3Dqemu-system-s390x QEMU_CONSOLE=3D"ttyS1" @@ -32,13 +32,38 @@ aarch64) exit 1 ;; esac + +# process CROSS_COMPILE setting to enable cross-compilation +process_cross_compile() { + if [ -z "${CROSS_COMPILE+x}" ]; then + return + fi + case "$1" in + x86_64) + #Cross-compiling for arm64 on an x86_64 host + if [[ $CROSS_COMPILE =3D=3D *aarch64* ]]; then + VM_ARCH=3Daarch64 + QEMU_CONSOLE=3D"ttyAMA0,115200" + QEMU_BINARY=3Dqemu-system-aarch64 + QEMU_FLAGS=3D(-M virt,gic-version=3D3 -cpu cortex-a57 -smp 8) + BZIMAGE=3D"arch/arm64/boot/Image" + echo "Setting VM_ARCH from $HOST_ARCH to $VM_ARCH as specified by CROS= S_COMPILE" + fi + ;; + esac +} + +VM_ARCH=3D${HOST_ARCH} +process_cross_compile "$VM_ARCH" + + DEFAULT_COMMAND=3D"./test_progs" MOUNT_DIR=3D"mnt" ROOTFS_IMAGE=3D"root.img" OUTPUT_DIR=3D"$HOME/.bpf_selftests" KCONFIG_REL_PATHS=3D("tools/testing/selftests/bpf/config" "tools/testing/selftests/bpf/config.vm" - "tools/testing/selftests/bpf/config.${ARCH}") + "tools/testing/selftests/bpf/config.${VM_ARCH}") INDEX_URL=3D"https://raw.githubusercontent.com/libbpf/ci/master/INDEX" NUM_COMPILE_JOBS=3D"$(nproc)" LOG_FILE_BASE=3D"$(date +"bpf_selftests.%Y-%m-%d_%H-%M-%S")" @@ -109,7 +134,7 @@ newest_rootfs_version() { { for file in "${!URLS[@]}"; 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Wed, 28 Aug 2024 12:17:39 +0000 Received: from SEYPR06MB5913.apcprd06.prod.outlook.com ([fe80::f049:a716:8200:c4a1]) by SEYPR06MB5913.apcprd06.prod.outlook.com ([fe80::f049:a716:8200:c4a1%4]) with mapi id 15.20.7897.021; Wed, 28 Aug 2024 12:17:39 +0000 From: Lin Yikai To: andrii@kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, mykolal@fb.com, shuah@kernel.org, terrelln@fb.com, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, opensource.kernel@vivo.com, yikai.lin@vivo.com Subject: [PATCH bpf-next v2 2/2] selftests/bpf: fix static cross-compile error for liblstd.a linking. 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charset="utf-8" Regard "LDLIBS +=3D -lzstd" as a separate patch for static compile. To fix static cross-compile error like this: $LDLIBS=3D-static LDFLAGS=3D--sysroot=3D/aarch64-linux-gnu/libc ./vmtest.= sh -s -- ./test_progs /aarch64-linux-gnu/bin/ld: aarch64-linux-gnu/libc/usr/lib/libelf.a(elf_co= mpress.o): in function `__libelf_compress': (.text+0xec): undefined reference to `ZSTD_createCCtx' /aarch64-linux-gnu/bin/ld: (.text+0xf0): undefined reference to `ZSTD_cre= ateCCtx' ... Signed-off-by: Lin Yikai --- tools/testing/selftests/bpf/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests= /bpf/Makefile index 3f0f9a171651..17d75ac2f461 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -46,7 +46,7 @@ CFLAGS +=3D -g $(OPT_FLAGS) -rdynamic \ -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT) LDFLAGS +=3D $(SAN_LDFLAGS) -LDLIBS +=3D $(LIBELF_LIBS) -lz -lrt -lpthread +LDLIBS +=3D $(LIBELF_LIBS) -lz -lrt -lpthread -lzstd =20 PCAP_CFLAGS :=3D $(shell $(PKG_CONFIG) --cflags libpcap 2>/dev/null && ech= o "-DTRAFFIC_MONITOR=3D1") PCAP_LIBS :=3D $(shell $(PKG_CONFIG) --libs libpcap 2>/dev/null) --=20 2.34.1