From 1549921da3e8efb6c95e39444c67ed1729a0ccaf Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 10 Jan 2018 12:25:59 +0000 Subject: nfp: bpf: move jump resolution to jit.c Jump target resolution should be in jit.c not offload.c. No functional changes. Signed-off-by: Jakub Kicinski Reviewed-by: Jiong Wang Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 0de59f04da84..9caff3a7505a 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -2742,3 +2742,26 @@ int nfp_bpf_jit(struct nfp_prog *nfp_prog) return nfp_bpf_ustore_calc(nfp_prog, (__force __le64 *)nfp_prog->prog); } + +void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) +{ + struct nfp_insn_meta *meta; + + /* Another pass to record jump information. */ + list_for_each_entry(meta, &nfp_prog->insns, l) { + u64 code = meta->insn.code; + + if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && + BPF_OP(code) != BPF_CALL) { + struct nfp_insn_meta *dst_meta; + unsigned short dst_indx; + + dst_indx = meta->n + 1 + meta->insn.off; + dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, + cnt); + + meta->jmp_dst = dst_meta; + dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; + } + } +} -- cgit v1.2.1 From 488feeaf6d2f9189bdb65f31094a8cff5fcd6c58 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 10 Jan 2018 12:26:00 +0000 Subject: 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 Reviewed-by: Jiong Wang Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 12 ------------ 1 file changed, 12 deletions(-) (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c') 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) { -- cgit v1.2.1 From 2314fe9ed0a1760ceab96b81e6b7181963c93254 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 10 Jan 2018 12:26:01 +0000 Subject: nfp: bpf: relocate jump targets just before the load Don't translate the program assuming it will be loaded at a given address. This will be required for sharing programs between ports of the same NIC, tail calls and subprograms. It will also make the jump targets easier to understand when dumping the program to user space. Translate the program as if it was going to be loaded at address zero. When load happens add the load offset in and set addresses of special branches. Signed-off-by: Jakub Kicinski Reviewed-by: Jiong Wang Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 149 ++++++++++++++------------- 1 file changed, 80 insertions(+), 69 deletions(-) (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index c5d1628a5414..3a5c747fd12b 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -85,7 +85,7 @@ static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) { - return nfp_prog->start_off + nfp_prog->prog_len; + return nfp_prog->prog_len; } static bool @@ -100,12 +100,6 @@ nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); } -static unsigned int -nfp_prog_offset_to_index(struct nfp_prog *nfp_prog, unsigned int offset) -{ - return offset - nfp_prog->start_off; -} - /* --- Emitters --- */ static void __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, @@ -195,22 +189,28 @@ __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, nfp_prog_push(nfp_prog, insn); } -static void emit_br_def(struct nfp_prog *nfp_prog, u16 addr, u8 defer) +static void +emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, + enum nfp_relo_type relo) { - if (defer > 2) { + if (mask == BR_UNC && defer > 2) { pr_err("BUG: branch defer out of bounds %d\n", defer); nfp_prog->error = -EFAULT; return; } - __emit_br(nfp_prog, BR_UNC, BR_EV_PIP_UNCOND, BR_CSS_NONE, addr, defer); + + __emit_br(nfp_prog, mask, + mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, + BR_CSS_NONE, addr, defer); + + nfp_prog->prog[nfp_prog->prog_len - 1] |= + FIELD_PREP(OP_RELO_TYPE, relo); } static void emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) { - __emit_br(nfp_prog, mask, - mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, - BR_CSS_NONE, addr, defer); + emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); } static void @@ -515,16 +515,6 @@ static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) emit_nop(nfp_prog); } -static void -wrp_br_special(struct nfp_prog *nfp_prog, enum br_mask mask, - enum br_special special) -{ - emit_br(nfp_prog, mask, 0, 0); - - nfp_prog->prog[nfp_prog->prog_len - 1] |= - FIELD_PREP(OP_BR_SPECIAL, special); -} - static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) { emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); @@ -749,7 +739,7 @@ construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); - wrp_br_special(nfp_prog, BR_BLO, OP_BR_GO_ABORT); + emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT); /* Load data */ return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); @@ -762,7 +752,7 @@ static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) /* Check packet length */ tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); - wrp_br_special(nfp_prog, BR_BLO, OP_BR_GO_ABORT); + emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT); /* Load data */ tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); @@ -1269,7 +1259,7 @@ static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); /* Skip over the -EINVAL ret code (defer 2) */ - emit_br_def(nfp_prog, end, 2); + emit_br(nfp_prog, BR_UNC, end, 2); emit_alu(nfp_prog, plen_reg(nfp_prog), plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); @@ -2036,7 +2026,7 @@ static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) { - wrp_br_special(nfp_prog, BR_UNC, OP_BR_GO_OUT); + emit_br_relo(nfp_prog, BR_UNC, 0, 0, RELO_BR_GO_OUT); return 0; } @@ -2125,11 +2115,9 @@ static int nfp_fixup_branches(struct nfp_prog *nfp_prog) continue; if (list_is_last(&meta->l, &nfp_prog->insns)) - idx = nfp_prog->last_bpf_off; + br_idx = nfp_prog->last_bpf_off; else - idx = list_next_entry(meta, l)->off - 1; - - br_idx = nfp_prog_offset_to_index(nfp_prog, idx); + br_idx = list_next_entry(meta, l)->off - 1; if (!nfp_is_br(nfp_prog->prog[br_idx])) { pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", @@ -2137,7 +2125,8 @@ static int nfp_fixup_branches(struct nfp_prog *nfp_prog) return -ELOOP; } /* Leave special branches for later */ - if (FIELD_GET(OP_BR_SPECIAL, nfp_prog->prog[br_idx])) + if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != + RELO_BR_REL) continue; if (!meta->jmp_dst) { @@ -2152,38 +2141,13 @@ static int nfp_fixup_branches(struct nfp_prog *nfp_prog) return -ELOOP; } - for (idx = nfp_prog_offset_to_index(nfp_prog, meta->off); - idx <= br_idx; idx++) { + for (idx = meta->off; idx <= br_idx; idx++) { if (!nfp_is_br(nfp_prog->prog[idx])) continue; br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); } } - /* Fixup 'goto out's separately, they can be scattered around */ - for (br_idx = 0; br_idx < nfp_prog->prog_len; br_idx++) { - enum br_special special; - - if ((nfp_prog->prog[br_idx] & OP_BR_BASE_MASK) != OP_BR_BASE) - continue; - - special = FIELD_GET(OP_BR_SPECIAL, nfp_prog->prog[br_idx]); - switch (special) { - case OP_BR_NORMAL: - break; - case OP_BR_GO_OUT: - br_set_offset(&nfp_prog->prog[br_idx], - nfp_prog->tgt_out); - break; - case OP_BR_GO_ABORT: - br_set_offset(&nfp_prog->prog[br_idx], - nfp_prog->tgt_abort); - break; - } - - nfp_prog->prog[br_idx] &= ~OP_BR_SPECIAL; - } - return 0; } @@ -2211,7 +2175,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) /* Target for aborts */ nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); - emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); + emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); @@ -2238,7 +2202,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) emit_shf(nfp_prog, reg_b(2), reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); - emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); + emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); emit_shf(nfp_prog, reg_b(2), reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); @@ -2257,7 +2221,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog) /* Target for aborts */ nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); - emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); + emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); @@ -2278,7 +2242,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog) emit_shf(nfp_prog, reg_b(2), reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); - emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); + emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); @@ -2694,20 +2658,19 @@ static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) return 0; } -static int nfp_bpf_ustore_calc(struct nfp_prog *nfp_prog, __le64 *ustore) +static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) { + __le64 *ustore = (__force __le64 *)prog; int i; - for (i = 0; i < nfp_prog->prog_len; i++) { + for (i = 0; i < len; i++) { int err; - err = nfp_ustore_check_valid_no_ecc(nfp_prog->prog[i]); + err = nfp_ustore_check_valid_no_ecc(prog[i]); if (err) return err; - nfp_prog->prog[i] = nfp_ustore_calc_ecc_insn(nfp_prog->prog[i]); - - ustore[i] = cpu_to_le64(nfp_prog->prog[i]); + ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); } return 0; @@ -2728,7 +2691,7 @@ int nfp_bpf_jit(struct nfp_prog *nfp_prog) return -EINVAL; } - return nfp_bpf_ustore_calc(nfp_prog, (__force __le64 *)nfp_prog->prog); + return ret; } void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) @@ -2753,3 +2716,51 @@ void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) } } } + +void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) +{ + unsigned int i; + u64 *prog; + int err; + + prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), + GFP_KERNEL); + if (!prog) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < nfp_prog->prog_len; i++) { + enum nfp_relo_type special; + + special = FIELD_GET(OP_RELO_TYPE, prog[i]); + switch (special) { + case RELO_NONE: + continue; + case RELO_BR_REL: + br_add_offset(&prog[i], bv->start_off); + break; + case RELO_BR_GO_OUT: + br_set_offset(&prog[i], + nfp_prog->tgt_out + bv->start_off); + break; + case RELO_BR_GO_ABORT: + br_set_offset(&prog[i], + nfp_prog->tgt_abort + bv->start_off); + break; + case RELO_BR_NEXT_PKT: + br_set_offset(&prog[i], bv->tgt_done); + break; + } + + prog[i] &= ~OP_RELO_TYPE; + } + + err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); + if (err) + goto err_free_prog; + + return prog; + +err_free_prog: + kfree(prog); + return ERR_PTR(err); +} -- cgit v1.2.1 From 44a12ecc1cab7dcf4647dfef7d94f5c559c01407 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 10 Jan 2018 12:26:02 +0000 Subject: nfp: bpf: don't depend on high order allocations for program image The translator pre-allocates a buffer of maximal program size. Due to HW/FW limitations the program buffer can't currently be longer than 128Kb, so we used to kmalloc() it, and then map for DMA directly. Now that the late branch resolution is copying the program image anyway, we can just kvmalloc() the buffer. While at it, after translation reallocate the buffer to save space. Signed-off-by: Jakub Kicinski Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 3a5c747fd12b..5deebbc18cfd 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -2676,6 +2676,20 @@ static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) return 0; } +static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) +{ + void *prog; + + prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); + if (!prog) + return; + + nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); + memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); + kvfree(nfp_prog->prog); + nfp_prog->prog = prog; +} + int nfp_bpf_jit(struct nfp_prog *nfp_prog) { int ret; @@ -2691,6 +2705,8 @@ int nfp_bpf_jit(struct nfp_prog *nfp_prog) return -EINVAL; } + nfp_bpf_prog_trim(nfp_prog); + return ret; } -- cgit v1.2.1 From e84797fe159c8f849edd96ab72cc21eb890656fe Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 10 Jan 2018 12:26:03 +0000 Subject: nfp: bpf: use a large constant in unresolved branches To make absolute relocated branches (branches which will be completely rewritten with br_set_offset()) distinguishable in user space dumps from normal jumps add a large offset to them. Signed-off-by: Jakub Kicinski Reviewed-by: Jiong Wang Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 5deebbc18cfd..b4ed6bca4ea9 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -739,7 +739,7 @@ construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); - emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT); + emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); /* Load data */ return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); @@ -752,7 +752,7 @@ static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) /* Check packet length */ tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); - emit_br_relo(nfp_prog, BR_BLO, 0, 0, RELO_BR_GO_ABORT); + emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); /* Load data */ tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); @@ -2026,7 +2026,7 @@ static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) { - emit_br_relo(nfp_prog, BR_UNC, 0, 0, RELO_BR_GO_OUT); + emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); return 0; } @@ -2175,7 +2175,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) /* Target for aborts */ nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); - emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); + emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); @@ -2202,7 +2202,7 @@ static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) emit_shf(nfp_prog, reg_b(2), reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); - emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); + emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); emit_shf(nfp_prog, reg_b(2), reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); @@ -2221,7 +2221,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog) /* Target for aborts */ nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); - emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); + emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); @@ -2242,7 +2242,7 @@ static void nfp_outro_xdp(struct nfp_prog *nfp_prog) emit_shf(nfp_prog, reg_b(2), reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); - emit_br_relo(nfp_prog, BR_UNC, 0, 2, RELO_BR_NEXT_PKT); + emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); -- cgit v1.2.1 From c087aa8bbf83ddcd54e49f42cf463bcea5bd2b94 Mon Sep 17 00:00:00 2001 From: Nic Viljoen Date: Wed, 10 Jan 2018 12:26:05 +0000 Subject: nfp: bpf: add signed jump insns This patch adds signed jump instructions (jsgt, jsge, jslt, jsle) to the nfp jit. As well as adding the additional required raw assembler branch mask to nfp_asm.h Signed-off-by: Nic Viljoen Reviewed-by: Jiong Wang Reviewed-by: Jakub Kicinski Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 48 ++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index b4ed6bca4ea9..47c5224f8d6f 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -1914,6 +1914,26 @@ static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); } +static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); +} + +static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); +} + +static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); +} + +static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); +} + static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) { const struct bpf_insn *insn = &meta->insn; @@ -2003,6 +2023,26 @@ static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); } +static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); +} + +static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); +} + +static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); +} + +static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); +} + static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) { return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); @@ -2087,6 +2127,10 @@ static const instr_cb_t instr_cb[256] = { [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, + [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, + [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, + [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, + [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, @@ -2094,6 +2138,10 @@ static const instr_cb_t instr_cb[256] = { [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, + [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, + [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, + [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, + [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, [BPF_JMP | BPF_CALL] = call, -- cgit v1.2.1