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- Avoid 'constexpr', which is a keyword in C23 - Allow 'dtbs_check' and 'dt_compatible_check' run independently of 'dt_binding_check' - Fix weak references to avoid GOT entries in position-independent code generation - Convert the last use of 'optional' property in arch/sh/Kconfig - Remove support for the 'optional' property in Kconfig - Remove support for Clang's ThinLTO caching, which does not work with the .incbin directive - Change the semantics of $(src) so it always points to the source directory, which fixes Makefile inconsistencies between upstream and downstream - Fix 'make tar-pkg' for RISC-V to produce a consistent package - Provide reasonable default coverage for objtool, sanitizers, and profilers - Remove redundant OBJECT_FILES_NON_STANDARD, KASAN_SANITIZE, etc. - Remove the last use of tristate choice in drivers/rapidio/Kconfig - Various cleanups and fixes in Kconfig -----BEGIN PGP SIGNATURE----- iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAmZFlGcVHG1hc2FoaXJv eUBrZXJuZWwub3JnAAoJED2LAQed4NsG8voQALC8NtFpduWVfLRj2Qg6Ll/xf1vX 2igcTJEOFHkeqXLGoT8dTDKLEipUBUvKyguPq66CGwVTe2g6zy/nUSXeVtFrUsIa msLTi8FqhqUo5lodNvGMRf8qqmuqcvnXoiQwIocF92jtsFy14bhiFY+n4HfcFNjj GOKwqBZYQUwY/VVb090efc7RfS9c7uwABJSBelSoxg3AGZriwjGy7Pw5aSKGgVYi inqL1eR6qwPP6z7CgQWM99soP+zwybFZmnQrsD9SniRBI4rtAat8Ih5jQFaSUFUQ lk2w0NQBRFN88/uR2IJ2GWuIlQ74WeJ+QnCqVuQ59tV5zw90wqSmLzngfPD057Dv JjNuhk0UyXVtpIg3lRtd4810ppNSTe33b9OM4O2H846W/crju5oDRNDHcflUXcwm Rmn5ho1rb5QVzDVejJbgwidnUInSgJ9PZcvXQ/RJVZPhpgsBzAY9pQexG1G3hviw y9UDrt6KP6bF9tHjmolmtdIes9Pj0c4dN6/Rdj4HS4hIQ/GDar0tnwvOvtfUctNL orJlBsA6GeMmDVXKkR0ytOCWRYqWWbyt8g70RVKQJfuHX7/hGyAQPaQ2/u4mQhC2 aevYfbNJMj0VDfGz81HDBKFtkc5n+Ite8l157dHEl2LEabkOkRdNVcn7SNbOvZmd ZCSnZ31h7woGfNho =D5B/ -----END PGP SIGNATURE----- Merge tag 'kbuild-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Avoid 'constexpr', which is a keyword in C23 - Allow 'dtbs_check' and 'dt_compatible_check' run independently of 'dt_binding_check' - Fix weak references to avoid GOT entries in position-independent code generation - Convert the last use of 'optional' property in arch/sh/Kconfig - Remove support for the 'optional' property in Kconfig - Remove support for Clang's ThinLTO caching, which does not work with the .incbin directive - Change the semantics of $(src) so it always points to the source directory, which fixes Makefile inconsistencies between upstream and downstream - Fix 'make tar-pkg' for RISC-V to produce a consistent package - Provide reasonable default coverage for objtool, sanitizers, and profilers - Remove redundant OBJECT_FILES_NON_STANDARD, KASAN_SANITIZE, etc. - Remove the last use of tristate choice in drivers/rapidio/Kconfig - Various cleanups and fixes in Kconfig * tag 'kbuild-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (46 commits) kconfig: use sym_get_choice_menu() in sym_check_prop() rapidio: remove choice for enumeration kconfig: lxdialog: remove initialization with A_NORMAL kconfig: m/nconf: merge two item_add_str() calls kconfig: m/nconf: remove dead code to display value of bool choice kconfig: m/nconf: remove dead code to display children of choice members kconfig: gconf: show checkbox for choice correctly kbuild: use GCOV_PROFILE and KCSAN_SANITIZE in scripts/Makefile.modfinal Makefile: remove redundant tool coverage variables kbuild: provide reasonable defaults for tool coverage modules: Drop the .export_symbol section from the final modules kconfig: use menu_list_for_each_sym() in sym_check_choice_deps() kconfig: use sym_get_choice_menu() in conf_write_defconfig() kconfig: add sym_get_choice_menu() helper kconfig: turn defaults and additional prompt for choice members into error kconfig: turn missing prompt for choice members into error kconfig: turn conf_choice() into void function kconfig: use linked list in sym_set_changed() kconfig: gconf: use MENU_CHANGED instead of SYMBOL_CHANGED kconfig: gconf: remove debug code ... |
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.. | ||
gnu | ||
.gitignore | ||
asm_goto_workaround.h | ||
bpf_insn.h | ||
cookie_uid_helper_example.c | ||
cpustat_kern.c | ||
cpustat_user.c | ||
do_hbm_test.sh | ||
fds_example.c | ||
hash_func01.h | ||
hbm_edt_kern.c | ||
hbm_kern.h | ||
hbm_out_kern.c | ||
hbm.c | ||
hbm.h | ||
ibumad_kern.c | ||
ibumad_user.c | ||
lathist_kern.c | ||
lathist_user.c | ||
lwt_len_hist_user.c | ||
lwt_len_hist.bpf.c | ||
lwt_len_hist.sh | ||
Makefile | ||
Makefile.target | ||
map_perf_test_user.c | ||
map_perf_test.bpf.c | ||
net_shared.h | ||
offwaketime_user.c | ||
offwaketime.bpf.c | ||
parse_ldabs.c | ||
parse_simple.c | ||
parse_varlen.c | ||
README.rst | ||
run_cookie_uid_helper_example.sh | ||
sampleip_kern.c | ||
sampleip_user.c | ||
sock_example.c | ||
sock_example.h | ||
sock_flags.bpf.c | ||
sockex1_kern.c | ||
sockex1_user.c | ||
sockex2_kern.c | ||
sockex2_user.c | ||
sockex3_kern.c | ||
sockex3_user.c | ||
spintest_user.c | ||
spintest.bpf.c | ||
syscall_nrs.c | ||
syscall_tp_kern.c | ||
syscall_tp_user.c | ||
task_fd_query_kern.c | ||
task_fd_query_user.c | ||
tc_l2_redirect_kern.c | ||
tc_l2_redirect_user.c | ||
tc_l2_redirect.sh | ||
tcbpf1_kern.c | ||
tcp_basertt_kern.c | ||
tcp_bpf.readme | ||
tcp_bufs_kern.c | ||
tcp_clamp_kern.c | ||
tcp_cong_kern.c | ||
tcp_dumpstats_kern.c | ||
tcp_iw_kern.c | ||
tcp_rwnd_kern.c | ||
tcp_synrto_kern.c | ||
tcp_tos_reflect_kern.c | ||
test_cgrp2_array_pin.c | ||
test_cgrp2_attach.c | ||
test_cgrp2_sock2.c | ||
test_cgrp2_sock2.sh | ||
test_cgrp2_sock.c | ||
test_cgrp2_sock.sh | ||
test_cgrp2_tc.bpf.c | ||
test_cgrp2_tc.sh | ||
test_cls_bpf.sh | ||
test_current_task_under_cgroup_user.c | ||
test_current_task_under_cgroup.bpf.c | ||
test_lru_dist.c | ||
test_lwt_bpf.c | ||
test_lwt_bpf.sh | ||
test_map_in_map_user.c | ||
test_map_in_map.bpf.c | ||
test_overhead_kprobe.bpf.c | ||
test_overhead_raw_tp.bpf.c | ||
test_overhead_tp.bpf.c | ||
test_overhead_user.c | ||
test_override_return.sh | ||
test_probe_write_user_user.c | ||
test_probe_write_user.bpf.c | ||
trace_event_kern.c | ||
trace_event_user.c | ||
trace_output_user.c | ||
trace_output.bpf.c | ||
tracex1_user.c | ||
tracex1.bpf.c | ||
tracex2_user.c | ||
tracex2.bpf.c | ||
tracex3_user.c | ||
tracex3.bpf.c | ||
tracex4_user.c | ||
tracex4.bpf.c | ||
tracex5_user.c | ||
tracex5.bpf.c | ||
tracex6_user.c | ||
tracex6.bpf.c | ||
tracex7_user.c | ||
tracex7.bpf.c | ||
xdp2skb_meta_kern.c | ||
xdp2skb_meta.sh | ||
xdp_adjust_tail_kern.c | ||
xdp_adjust_tail_user.c | ||
xdp_fwd_kern.c | ||
xdp_fwd_user.c | ||
xdp_router_ipv4_user.c | ||
xdp_router_ipv4.bpf.c | ||
xdp_sample_shared.h | ||
xdp_sample_user.c | ||
xdp_sample_user.h | ||
xdp_sample.bpf.c | ||
xdp_sample.bpf.h | ||
xdp_tx_iptunnel_common.h | ||
xdp_tx_iptunnel_kern.c | ||
xdp_tx_iptunnel_user.c |
eBPF sample programs ==================== This directory contains a test stubs, verifier test-suite and examples for using eBPF. The examples use libbpf from tools/lib/bpf. Note that the XDP-specific samples have been removed from this directory and moved to the xdp-tools repository: https://github.com/xdp-project/xdp-tools See the commit messages removing each tool from this directory for how to convert specific command invocations between the old samples and the utilities in xdp-tools. Build dependencies ================== Compiling requires having installed: * clang * llvm * pahole Consult :ref:`Documentation/process/changes.rst <changes>` for the minimum version numbers required and how to update them. Note that LLVM's tool 'llc' must support target 'bpf', list version and supported targets with command: ``llc --version`` Clean and configuration ----------------------- It can be needed to clean tools, samples or kernel before trying new arch or after some changes (on demand):: make -C tools clean make -C samples/bpf clean make clean Configure kernel, defconfig for instance (see "tools/testing/selftests/bpf/config" for a reference config):: make defconfig Kernel headers -------------- There are usually dependencies to header files of the current kernel. To avoid installing devel kernel headers system wide, as a normal user, simply call:: make headers_install This will create a local "usr/include" directory in the git/build top level directory, that the make system will automatically pick up first. Compiling ========= For building the BPF samples, issue the below command from the kernel top level directory:: make M=samples/bpf It is also possible to call make from this directory. This will just hide the invocation of make as above. Manually compiling LLVM with 'bpf' support ------------------------------------------ Since version 3.7.0, LLVM adds a proper LLVM backend target for the BPF bytecode architecture. By default llvm will build all non-experimental backends including bpf. To generate a smaller llc binary one can use:: -DLLVM_TARGETS_TO_BUILD="BPF" We recommend that developers who want the fastest incremental builds use the Ninja build system, you can find it in your system's package manager, usually the package is ninja or ninja-build. Quick sniplet for manually compiling LLVM and clang (build dependencies are ninja, cmake and gcc-c++):: $ git clone https://github.com/llvm/llvm-project.git $ mkdir -p llvm-project/llvm/build $ cd llvm-project/llvm/build $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ -DLLVM_ENABLE_PROJECTS="clang" \ -DCMAKE_BUILD_TYPE=Release \ -DLLVM_BUILD_RUNTIME=OFF $ ninja It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang Cross compiling samples ----------------------- In order to cross-compile, say for arm64 targets, export CROSS_COMPILE and ARCH environment variables before calling make. But do this before clean, configuration and header install steps described above. This will direct make to build samples for the cross target:: export ARCH=arm64 export CROSS_COMPILE="aarch64-linux-gnu-" Headers can be also installed on RFS of target board if need to keep them in sync (not necessarily and it creates a local "usr/include" directory also):: make INSTALL_HDR_PATH=~/some_sysroot/usr headers_install Pointing LLC and CLANG is not necessarily if it's installed on HOST and have in its targets appropriate arm64 arch (usually it has several arches). Build samples:: make M=samples/bpf Or build samples with SYSROOT if some header or library is absent in toolchain, say libelf, providing address to file system containing headers and libs, can be RFS of target board:: make M=samples/bpf SYSROOT=~/some_sysroot