ppc: bpf: rename bpf_jit_64.S to bpf_jit_asm.S

2015-02-20T20:19:43Z

Signed-off-by: Denis Kirjanov Signed-off-by: David S. Miller

net: filter: BPF 'JIT' compiler for PPC64

2011-07-21T19:38:32Z

An implementation of a code generator for BPF programs to speed up packet filtering on PPC64, inspired by Eric Dumazet's x86-64 version. Filter code is generated as an ABI-compliant function in module_alloc()'d mem with stackframe & prologue/epilogue generated if required (simple filters don't need anything more than an li/blr). The filter's local variables, M[], live in registers. Supports all BPF opcodes, although "complicated" loads from negative packet offsets (e.g. SKF_LL_OFF) are not yet supported. There are a couple of further optimisations left for future work; many-pass assembly with branch-reach reduction and a register allocator to push M[] variables into volatile registers would improve the code quality further. This currently supports big-endian 64-bit PowerPC only (but is fairly simple to port to PPC32 or LE!). Enabled in the same way as x86-64: echo 1 > /proc/sys/net/core/bpf_jit_enable Or, enabled with extra debug output: echo 2 > /proc/sys/net/core/bpf_jit_enable Signed-off-by: Matt Evans Acked-by: Eric Dumazet Signed-off-by: David S. Miller

kernel/arch/powerpc/net/Makefile, branch linux-4.3.y

ppc: bpf: rename bpf_jit_64.S to bpf_jit_asm.S

net: filter: BPF 'JIT' compiler for PPC64