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| author | Alexander Lobakin <alobakin@dlink.ru> | 2019-12-06 11:07:41 +0300 |
|---|---|---|
| committer | Paul Burton <paulburton@kernel.org> | 2019-12-18 15:15:04 -0800 |
| commit | f596cf0d8062cb5d0a4513a8b3afca318c13be10 (patch) | |
| tree | 6f74bba6b347b6382056030705a1ebdc4a0de319 /arch/mips/net | |
| parent | f8fffebdea752a25757b906f3dffecf1a59a6194 (diff) | |
| download | linux-f596cf0d8062cb5d0a4513a8b3afca318c13be10.tar.bz2 | |
MIPS: BPF: eBPF JIT: check for MIPS ISA compliance in Kconfig
It is completely wrong to check for compile-time MIPS ISA revision in
the body of bpf_int_jit_compile() as it may lead to get MIPS JIT fully
omitted by the CC while the rest system will think that the JIT is
actually present and works [1].
We can check if the selected CPU really supports MIPS eBPF JIT at
configure time and avoid such situations when kernel can be built
without both JIT and interpreter, but with CONFIG_BPF_SYSCALL=y.
[1] https://lore.kernel.org/linux-mips/09d713a59665d745e21d021deeaebe0a@dlink.ru/
Fixes: 716850ab104d ("MIPS: eBPF: Initial eBPF support for MIPS32 architecture.")
Cc: <stable@vger.kernel.org> # v5.2+
Signed-off-by: Alexander Lobakin <alobakin@dlink.ru>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Hassan Naveed <hnaveed@wavecomp.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org
Diffstat (limited to 'arch/mips/net')
| -rw-r--r-- | arch/mips/net/ebpf_jit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/net/ebpf_jit.c b/arch/mips/net/ebpf_jit.c index 46b76751f3a5..a2405d5f7d1e 100644 --- a/arch/mips/net/ebpf_jit.c +++ b/arch/mips/net/ebpf_jit.c @@ -1803,7 +1803,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog) unsigned int image_size; u8 *image_ptr; - if (!prog->jit_requested || MIPS_ISA_REV < 2) + if (!prog->jit_requested) return prog; tmp = bpf_jit_blind_constants(prog); |