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author | Zi Shen Lim <zlim.lnx@gmail.com> | 2016-01-13 23:33:22 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2016-01-17 19:15:26 -0500 |
commit | 42ff712bc0c3d7cd60d29b319aecd2d2c8cc75d4 (patch) | |
tree | 41722ff39391f428b5ee48ce461b32329be4fda4 /drivers/net/phy/at803x.c | |
parent | arm64: insn: remove BUG_ON from codegen (diff) | |
download | linux-dev-42ff712bc0c3d7cd60d29b319aecd2d2c8cc75d4.tar.xz linux-dev-42ff712bc0c3d7cd60d29b319aecd2d2c8cc75d4.zip |
arm64: bpf: add extra pass to handle faulty codegen
Code generation functions in arch/arm64/kernel/insn.c previously
BUG_ON invalid parameters. Following change of that behavior, now we
need to handle the error case where AARCH64_BREAK_FAULT is returned.
Instead of error-handling on every emit() in JIT, we add a new
validation pass at the end of JIT compilation. There's no point in
running JITed code at run-time only to trap due to AARCH64_BREAK_FAULT.
Instead, we drop this failed JIT compilation and allow the system to
gracefully fallback on the BPF interpreter.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/at803x.c')
0 files changed, 0 insertions, 0 deletions