diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-10-23 11:58:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-24 17:38:37 +0900 |
| commit | b14157eeed4eff2b293e0ca7738f6a3dbfff51cc (patch) | |
| tree | 058eb11cfc701cf182a17b1259de1868934cf419 /drivers/net/ethernet/netronome/nfp/bpf/main.h | |
| parent | 2df03a50f14ab6d888c212aa332536933ded040a (diff) | |
nfp: bpf: support stack accesses via non-constant pointers
If stack pointer has a different value on different paths
but the alignment to words (4B) remains the same, we can
set a new LMEM access pointer to the calculated value and
access whichever word it's pointing to.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index d4f144a62f0f..86edc0691a5f 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -101,6 +101,7 @@ typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); * struct nfp_insn_meta - BPF instruction wrapper * @insn: BPF instruction * @ptr: pointer type for memory operations + * @ptr_not_const: pointer is not always constant * @off: index of first generated machine instruction (in nfp_prog.prog) * @n: eBPF instruction number * @skip: skip this instruction (optimized out) @@ -110,6 +111,7 @@ typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); struct nfp_insn_meta { struct bpf_insn insn; struct bpf_reg_state ptr; + bool ptr_not_const; unsigned int off; unsigned short n; bool skip; |