path: root/arch/riscv/Makefile
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authorBjörn Töpel <bjorn.topel@gmail.com>2019-02-05 13:41:22 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2019-02-05 16:56:10 +0100
commit2353ecc6f91fd15b893fa01bf85a1c7a823ee4f2 (patch)
tree309a4f88c91f36813f16d88cc8627a737779b4fe /arch/riscv/Makefile
parentMerge branch 'bpf-btf-dedup' (diff)
bpf, riscv: add BPF JIT for RV64G
This commit adds a BPF JIT for RV64G. The JIT is a two-pass JIT, and has a dynamic prolog/epilogue (similar to the MIPS64 BPF JIT) instead of static ones (e.g. x86_64). At the moment the RISC-V Linux port does not support CONFIG_HAVE_KPROBES, which means that CONFIG_BPF_EVENTS is not supported. Thus, no tests involving BPF_PROG_TYPE_TRACEPOINT, BPF_PROG_TYPE_PERF_EVENT, BPF_PROG_TYPE_KPROBE and BPF_PROG_TYPE_RAW_TRACEPOINT passes. The implementation does not support "far branching" (>4KiB). Test results: # modprobe test_bpf test_bpf: Summary: 378 PASSED, 0 FAILED, [366/366 JIT'ed] # echo 1 > /proc/sys/kernel/unprivileged_bpf_disabled # ./test_verifier ... Summary: 761 PASSED, 507 SKIPPED, 2 FAILED Note that "test_verifier" was run with one build with CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y and one without, otherwise many of the the tests that require unaligned access were skipped. CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y: # echo 1 > /proc/sys/kernel/unprivileged_bpf_disabled # ./test_verifier | grep -c 'NOTE.*unknown align' 0 No CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS: # echo 1 > /proc/sys/kernel/unprivileged_bpf_disabled # ./test_verifier | grep -c 'NOTE.*unknown align' 59 The two failing test_verifier tests are: "ld_abs: vlan + abs, test 1" "ld_abs: jump around ld_abs" This is due to that "far branching" involved in those tests. All tests where done on QEMU (QEMU emulator version 3.1.50 (v3.1.0-688-g8ae951fbc106)). Signed-off-by: Björn Töpel <bjorn.topel@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'arch/riscv/Makefile')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 4b594f2e4f7e..c6342e638ef7 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -77,7 +77,7 @@ KBUILD_IMAGE := $(boot)/Image.gz
head-y := arch/riscv/kernel/head.o
-core-y += arch/riscv/kernel/ arch/riscv/mm/
+core-y += arch/riscv/kernel/ arch/riscv/mm/ arch/riscv/net/
libs-y += arch/riscv/lib/