On Wed, Dec 05, 2018 at 01:52:29PM -0500, Jiong Wang wrote:
> BPF_ALU | BPF_ARSH | BPF_* were rejected by commit: 7891a87efc71
> ("bpf: arsh is not supported in 32 bit alu thus reject it"). As explained
> in the commit message, this is due to there is no complete support for them
> on interpreter and various JIT compilation back-ends.
>
> This patch set is a follow-up which completes the missing bits. This also
> pave the way for running bpf program compiled with ALU32 instruction
> enabled by specifing -mattr=+alu32 to LLVM for which case there is likely
> to have more BPF_ALU | BPF_ARSH insns that will trigger the rejection code.
>
> test_verifier.c is updated accordingly.
>
> I have tested this patch set on x86-64 and NFP, I need help of review and
> test on the arch changes (mips/ppc/s390).
>
> Note, there might be merge confict on mips change which is better to be
> applied on top of:
>
> commit: 20b880a05f06 ("mips: bpf: fix encoding bug for mm_srlv32_op"),
>
> which is on mips-fixes branch at the moment.
>
> Thanks.
>
> v1->v2:
> - Fix ppc implementation bug. Should zero high bits explicitly.
I've applied this set and earlier commit "mips: bpf: fix encoding bug for
mm_srlv32_op"
to bpf-next.
Thanks
