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Commit 3b497806 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

bpf, s390x: implement jiting of BPF_J{LT, LE, SLT, SLE} 



This work implements jiting of BPF_J{LT,LE,SLT,SLE} instructions
with BPF_X/BPF_K variants for the s390x eBPF JIT.

Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 18423550

arch/s390/net/bpf_jit_comp.c

+24 −0
Original line number Diff line number Diff line
@@ -1093,15 +1093,27 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i 
	case BPF_JMP | BPF_JSGT | BPF_K: /* ((s64) dst > (s64) imm) */

		mask = 0x2000; /* jh */

		goto branch_ks;

	case BPF_JMP | BPF_JSLT | BPF_K: /* ((s64) dst < (s64) imm) */

		mask = 0x4000; /* jl */

		goto branch_ks;

	case BPF_JMP | BPF_JSGE | BPF_K: /* ((s64) dst >= (s64) imm) */

		mask = 0xa000; /* jhe */

		goto branch_ks;

	case BPF_JMP | BPF_JSLE | BPF_K: /* ((s64) dst <= (s64) imm) */

		mask = 0xc000; /* jle */

		goto branch_ks;

	case BPF_JMP | BPF_JGT | BPF_K: /* (dst_reg > imm) */

		mask = 0x2000; /* jh */

		goto branch_ku;

	case BPF_JMP | BPF_JLT | BPF_K: /* (dst_reg < imm) */

		mask = 0x4000; /* jl */

		goto branch_ku;

	case BPF_JMP | BPF_JGE | BPF_K: /* (dst_reg >= imm) */

		mask = 0xa000; /* jhe */

		goto branch_ku;

	case BPF_JMP | BPF_JLE | BPF_K: /* (dst_reg <= imm) */

		mask = 0xc000; /* jle */

		goto branch_ku;

	case BPF_JMP | BPF_JNE | BPF_K: /* (dst_reg != imm) */

		mask = 0x7000; /* jne */

		goto branch_ku;
@@ -1119,15 +1131,27 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i 
	case BPF_JMP | BPF_JSGT | BPF_X: /* ((s64) dst > (s64) src) */

		mask = 0x2000; /* jh */

		goto branch_xs;

	case BPF_JMP | BPF_JSLT | BPF_X: /* ((s64) dst < (s64) src) */

		mask = 0x4000; /* jl */

		goto branch_xs;

	case BPF_JMP | BPF_JSGE | BPF_X: /* ((s64) dst >= (s64) src) */

		mask = 0xa000; /* jhe */

		goto branch_xs;

	case BPF_JMP | BPF_JSLE | BPF_X: /* ((s64) dst <= (s64) src) */

		mask = 0xc000; /* jle */

		goto branch_xs;

	case BPF_JMP | BPF_JGT | BPF_X: /* (dst > src) */

		mask = 0x2000; /* jh */

		goto branch_xu;

	case BPF_JMP | BPF_JLT | BPF_X: /* (dst < src) */

		mask = 0x4000; /* jl */

		goto branch_xu;

	case BPF_JMP | BPF_JGE | BPF_X: /* (dst >= src) */

		mask = 0xa000; /* jhe */

		goto branch_xu;

	case BPF_JMP | BPF_JLE | BPF_X: /* (dst <= src) */

		mask = 0xc000; /* jle */

		goto branch_xu;

	case BPF_JMP | BPF_JNE | BPF_X: /* (dst != src) */

		mask = 0x7000; /* jne */

		goto branch_xu;