diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-03-28 17:48:36 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-03-28 19:36:14 -0700 |
| commit | 41aed09cf61c00ef6c3b2648d5a193cbaf2a74d0 (patch) | |
| tree | 7ba8625d79f116af1aca358f991d9b7fb1fcdfb4 /drivers/net/ethernet/netronome/nfp/bpf/main.h | |
| parent | b556ddd9c19983f3f13ab0d524f884349fead115 (diff) | |
| download | linux-41aed09cf61c00ef6c3b2648d5a193cbaf2a74d0.tar.bz2 | |
nfp: bpf: add support for atomic add of unknown values
Allow atomic add to be used even when the value is not guaranteed
to fit into a 16 bit immediate. This requires the value to be pulled
as data, and therefore use of a transfer register and a context swap.
Track the information about possible lengths of the value, if it's
guaranteed to be larger than 16bits don't generate the code for the
optimized case at all.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 877be7143991..a73b86c6ce52 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -229,6 +229,8 @@ struct nfp_bpf_reg_state { * @pkt_cache.range_start: start offset for associated packet data cache * @pkt_cache.range_end: end offset for associated packet data cache * @pkt_cache.do_init: this read needs to initialize packet data cache + * @xadd_over_16bit: 16bit immediate is not guaranteed + * @xadd_maybe_16bit: 16bit immediate is possible * @jmp_dst: destination info for jump instructions * @func_id: function id for call instructions * @arg1: arg1 for call instructions @@ -243,6 +245,7 @@ struct nfp_bpf_reg_state { struct nfp_insn_meta { struct bpf_insn insn; union { + /* pointer ops (ld/st/xadd) */ struct { struct bpf_reg_state ptr; struct bpf_insn *paired_st; @@ -253,8 +256,12 @@ struct nfp_insn_meta { s16 range_end; bool do_init; } pkt_cache; + bool xadd_over_16bit; + bool xadd_maybe_16bit; }; + /* jump */ struct nfp_insn_meta *jmp_dst; + /* function calls */ struct { u32 func_id; struct bpf_reg_state arg1; |