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authorMatt Evans <matt@ozlabs.org>2011-07-20 15:51:00 +0000
committerDavid S. Miller <davem@davemloft.net>2011-07-21 12:38:32 -0700
commit0ca87f05ba8bdc6791c14878464efc901ad71e99 (patch)
treec37e25b30c22adae633dcacb2236e83086887418 /arch/powerpc/Makefile
parent3aeb7d2243e55ddcad3c0b402e7b09619a67f5da (diff)
downloadlinaro-lsk-0ca87f05ba8bdc6791c14878464efc901ad71e99.tar.gz
net: filter: BPF 'JIT' compiler for PPC64
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 <matt@ozlabs.org> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/powerpc/Makefile')
-rw-r--r--arch/powerpc/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index b7212b619c5..b94740f36b1 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -154,7 +154,8 @@ core-y += arch/powerpc/kernel/ \
arch/powerpc/lib/ \
arch/powerpc/sysdev/ \
arch/powerpc/platforms/ \
- arch/powerpc/math-emu/
+ arch/powerpc/math-emu/ \
+ arch/powerpc/net/
core-$(CONFIG_XMON) += arch/powerpc/xmon/
core-$(CONFIG_KVM) += arch/powerpc/kvm/