kernel.git/arch/s390/net, branch linux-3.10.y

s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH

2014-05-13T11:59:42Z

commit 6e0de817594c61f3b392a9245deeb09609ec707d upstream. The A register needs to be initialized to zero in the prolog if the first instruction of the BPF program is BPF_S_LDX_B_MSH to prevent leaking the content of %r5 to user space. Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman

s390/bpf,jit: fix 32 bit divisions, use unsigned divide instructions

2014-02-06T19:08:16Z

[ Upstream commit 3af57f78c38131b7a66e2b01e06fdacae01992a3 ] The s390 bpf jit compiler emits the signed divide instructions "dr" and "d" for unsigned divisions. This can cause problems: the dividend will be zero extended to a 64 bit value and the divisor is the 32 bit signed value as specified A or X accumulator, even though A and X are supposed to be treated as unsigned values. The divide instrunctions will generate an exception if the result cannot be expressed with a 32 bit signed value. This is the case if e.g. the dividend is 0xffffffff and the divisor either 1 or also 0xffffffff (signed: -1). To avoid all these issues simply use unsigned divide instructions. Signed-off-by: Heiko Carstens Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

bpf: do not use reciprocal divide

2014-02-06T19:08:16Z

[ Upstream commit aee636c4809fa54848ff07a899b326eb1f9987a2 ] At first Jakub Zawadzki noticed that some divisions by reciprocal_divide were not correct. (off by one in some cases) http://www.wireshark.org/~darkjames/reciprocal-buggy.c He could also show this with BPF: http://www.wireshark.org/~darkjames/set-and-dump-filter-k-bug.c The reciprocal divide in linux kernel is not generic enough, lets remove its use in BPF, as it is not worth the pain with current cpus. Signed-off-by: Eric Dumazet Reported-by: Jakub Zawadzki Cc: Mircea Gherzan Cc: Daniel Borkmann Cc: Hannes Frederic Sowa Cc: Matt Evans Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: David S. Miller Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

s390/bpf,jit: use kcalloc instead of kmalloc and memset

2013-04-17T12:07:27Z

Signed-off-by: Stelian Nirlu Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/bpf,jit: add vlan tag support

2013-02-14T14:55:20Z

s390 version of 855ddb56 "x86: bpf_jit_comp: add vlan tag support". Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/bpf,jit: add support for XOR instruction

2012-12-03T15:44:05Z

Add support for XOR instruction for use with X/K. s390 JIT support for the new BPF_S_ALU_XOR_* instructions introduced with 9e49e889 "filter: add XOR instruction for use with X/K". Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/bpf,jit: add support MOD instruction

2012-12-03T15:44:02Z

Add support for MOD operation for s390's JIT. Same as 280050cc "x86 bpf_jit: support MOD operation" for x86 which adds JIT support for the generic new MOD operation introduced with b6069a9570 "filter: add MOD operation". Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/bpf,jit: add support for BPF_S_ANC_ALU_XOR_X instruction

2012-09-26T13:45:28Z

Add support for new BPF_S_ANC_ALU_XOR_X instruction which got added with ffe06c17 "filter: add XOR operation". s390 version of 4bfaddf1 "x86 bpf_jit: support BPF_S_ANC_ALU_XOR_X instruction". Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/bpf,jit: improve code generation

2012-09-26T13:44:49Z

Make use of new immediate instructions that came with the extended immediate and general instruction extension facilities. Reviewed-by: Martin Schwidefsky Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/bpf,jit: BPF Just In Time compiler for s390

2012-09-26T13:44:49Z

The s390 implementation of the JIT compiler for packet filter speedup. Reviewed-by: Heiko Carstens Signed-off-by: Martin Schwidefsky