diff options
| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-01-10 12:26:00 +0000 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-01-10 13:49:35 +0100 |
| commit | 488feeaf6d2f9189bdb65f31094a8cff5fcd6c58 (patch) | |
| tree | 635d27a12d0d09171a494dfb44ec42717d419782 /drivers/net/ethernet/netronome | |
| parent | nfp: bpf: move jump resolution to jit.c (diff) | |
| download | linux-dev-488feeaf6d2f9189bdb65f31094a8cff5fcd6c58.tar.xz linux-dev-488feeaf6d2f9189bdb65f31094a8cff5fcd6c58.zip | |
nfp: bpf: add helpers for modifying branch addresses
In preparation for better handling of relocations move existing
helper for setting branch offset to nfp_asm.c and add two more.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/net/ethernet/netronome')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/jit.c | 12 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_asm.c | 30 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_asm.h | 4 |
3 files changed, 34 insertions, 12 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 9caff3a7505a..c5d1628a5414 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -2110,18 +2110,6 @@ static const instr_cb_t instr_cb[256] = { [BPF_JMP | BPF_EXIT] = goto_out, }; -/* --- Misc code --- */ -static void br_set_offset(u64 *instr, u16 offset) -{ - u16 addr_lo, addr_hi; - - addr_lo = offset & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); - addr_hi = offset != addr_lo; - *instr &= ~(OP_BR_ADDR_HI | OP_BR_ADDR_LO); - *instr |= FIELD_PREP(OP_BR_ADDR_HI, addr_hi); - *instr |= FIELD_PREP(OP_BR_ADDR_LO, addr_lo); -} - /* --- Assembler logic --- */ static int nfp_fixup_branches(struct nfp_prog *nfp_prog) { diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.c b/drivers/net/ethernet/netronome/nfp/nfp_asm.c index d3610987fb07..9ee3a3f60cc7 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_asm.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.c @@ -50,6 +50,36 @@ const struct cmd_tgt_act cmd_tgt_act[__CMD_TGT_MAP_SIZE] = { [CMD_TGT_READ_SWAP_LE] = { 0x03, 0x40 }, }; +u16 br_get_offset(u64 instr) +{ + u16 addr_lo, addr_hi; + + addr_lo = FIELD_GET(OP_BR_ADDR_LO, instr); + addr_hi = FIELD_GET(OP_BR_ADDR_HI, instr); + + return (addr_hi * ((OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)) + 1)) | + addr_lo; +} + +void br_set_offset(u64 *instr, u16 offset) +{ + u16 addr_lo, addr_hi; + + addr_lo = offset & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); + addr_hi = offset != addr_lo; + *instr &= ~(OP_BR_ADDR_HI | OP_BR_ADDR_LO); + *instr |= FIELD_PREP(OP_BR_ADDR_HI, addr_hi); + *instr |= FIELD_PREP(OP_BR_ADDR_LO, addr_lo); +} + +void br_add_offset(u64 *instr, u16 offset) +{ + u16 addr; + + addr = br_get_offset(*instr); + br_set_offset(instr, addr + offset); +} + static u16 nfp_swreg_to_unreg(swreg reg, bool is_dst) { bool lm_id, lm_dec = false; diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.h b/drivers/net/ethernet/netronome/nfp/nfp_asm.h index a24daeab1a77..a50240ab0ce2 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_asm.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.h @@ -93,6 +93,10 @@ enum br_ctx_signal_state { BR_CSS_NONE = 2, }; +u16 br_get_offset(u64 instr); +void br_set_offset(u64 *instr, u16 offset); +void br_add_offset(u64 *instr, u16 offset); + #define OP_BBYTE_BASE 0x0c800000000ULL #define OP_BB_A_SRC 0x000000000ffULL #define OP_BB_BYTE 0x00000000300ULL |