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    SubjectRe: [PATCH 21/31] perf tools: Move linux/filter.h to tools/include
    Em Sat, Aug 29, 2015 at 04:21:55AM +0000, Wang Nan escreveu:
    > From: He Kuang <hekuang@huawei.com>
    >
    > This patch moves filter.h from include/linux/kernel.h to

    Does this really _move_ a file from include/linux/kernel.h to some other
    place? Isn't there any other users for such file in the kernel sources?
    :-)

    Looking at the patch I see that it doesn't move anything, it _copies_
    the file, right?

    - Arnaldo

    > tools/include/linux/filter.h to enable other libraries use macros in
    > it, like libbpf which will be introduced by further patches. Currenty,
    > the moved filter.h only contains the useful macros needed by libbpf
    > for not introducing too much dependence.
    >
    > MANIFEST is also updated for 'make perf-*-src-pkg'.
    >
    > One change:
    > imm field of BPF_EMIT_CALL becomes ((FUNC) - BPF_FUNC_unspec) to
    > suit user space code generator.
    >
    > Signed-off-by: He Kuang <hekuang@huawei.com>
    > Signed-off-by: Wang Nan <wangnan0@huawei.com>
    > Cc: Alexei Starovoitov <ast@plumgrid.com>
    > Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
    > Cc: Daniel Borkmann <daniel@iogearbox.net>
    > Cc: David Ahern <dsahern@gmail.com>
    > Cc: He Kuang <hekuang@huawei.com>
    > Cc: Jiri Olsa <jolsa@kernel.org>
    > Cc: Kaixu Xia <xiakaixu@huawei.com>
    > Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
    > Cc: Namhyung Kim <namhyung@kernel.org>
    > Cc: Paul Mackerras <paulus@samba.org>
    > Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    > Cc: Zefan Li <lizefan@huawei.com>
    > Cc: pi3orama@163.com
    > Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    > Link: http://lkml.kernel.org/n/1436445342-1402-32-git-send-email-wangnan0@huawei.com
    > ---
    > tools/include/linux/filter.h | 237 +++++++++++++++++++++++++++++++++++++++++++
    > tools/perf/MANIFEST | 1 +
    > 2 files changed, 238 insertions(+)
    > create mode 100644 tools/include/linux/filter.h
    >
    > diff --git a/tools/include/linux/filter.h b/tools/include/linux/filter.h
    > new file mode 100644
    > index 0000000..11d2b1c
    > --- /dev/null
    > +++ b/tools/include/linux/filter.h
    > @@ -0,0 +1,237 @@
    > +/*
    > + * Linux Socket Filter Data Structures
    > + */
    > +#ifndef __TOOLS_LINUX_FILTER_H
    > +#define __TOOLS_LINUX_FILTER_H
    > +
    > +#include <linux/bpf.h>
    > +
    > +/* ArgX, context and stack frame pointer register positions. Note,
    > + * Arg1, Arg2, Arg3, etc are used as argument mappings of function
    > + * calls in BPF_CALL instruction.
    > + */
    > +#define BPF_REG_ARG1 BPF_REG_1
    > +#define BPF_REG_ARG2 BPF_REG_2
    > +#define BPF_REG_ARG3 BPF_REG_3
    > +#define BPF_REG_ARG4 BPF_REG_4
    > +#define BPF_REG_ARG5 BPF_REG_5
    > +#define BPF_REG_CTX BPF_REG_6
    > +#define BPF_REG_FP BPF_REG_10
    > +
    > +/* Additional register mappings for converted user programs. */
    > +#define BPF_REG_A BPF_REG_0
    > +#define BPF_REG_X BPF_REG_7
    > +#define BPF_REG_TMP BPF_REG_8
    > +
    > +/* BPF program can access up to 512 bytes of stack space. */
    > +#define MAX_BPF_STACK 512
    > +
    > +/* Helper macros for filter block array initializers. */
    > +
    > +/* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
    > +
    > +#define BPF_ALU64_REG(OP, DST, SRC) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = 0 })
    > +
    > +#define BPF_ALU32_REG(OP, DST, SRC) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU | BPF_OP(OP) | BPF_X, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = 0 })
    > +
    > +/* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */
    > +
    > +#define BPF_ALU64_IMM(OP, DST, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +#define BPF_ALU32_IMM(OP, DST, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU | BPF_OP(OP) | BPF_K, \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +/* Endianness conversion, cpu_to_{l,b}e(), {l,b}e_to_cpu() */
    > +
    > +#define BPF_ENDIAN(TYPE, DST, LEN) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU | BPF_END | BPF_SRC(TYPE), \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = LEN })
    > +
    > +/* Short form of mov, dst_reg = src_reg */
    > +
    > +#define BPF_MOV64_REG(DST, SRC) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU64 | BPF_MOV | BPF_X, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = 0 })
    > +
    > +#define BPF_MOV32_REG(DST, SRC) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU | BPF_MOV | BPF_X, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = 0 })
    > +
    > +/* Short form of mov, dst_reg = imm32 */
    > +
    > +#define BPF_MOV64_IMM(DST, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU64 | BPF_MOV | BPF_K, \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +#define BPF_MOV32_IMM(DST, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU | BPF_MOV | BPF_K, \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +/* Short form of mov based on type,
    > + * BPF_X: dst_reg = src_reg, BPF_K: dst_reg = imm32
    > + */
    > +
    > +#define BPF_MOV64_RAW(TYPE, DST, SRC, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU64 | BPF_MOV | BPF_SRC(TYPE), \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +#define BPF_MOV32_RAW(TYPE, DST, SRC, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ALU | BPF_MOV | BPF_SRC(TYPE), \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +/* Direct packet access, R0 = *(uint *) (skb->data + imm32) */
    > +
    > +#define BPF_LD_ABS(SIZE, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_LD | BPF_SIZE(SIZE) | BPF_ABS, \
    > + .dst_reg = 0, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +/* Indirect packet access, R0 = *(uint *) (skb->data + src_reg + imm32) */
    > +
    > +#define BPF_LD_IND(SIZE, SRC, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_LD | BPF_SIZE(SIZE) | BPF_IND, \
    > + .dst_reg = 0, \
    > + .src_reg = SRC, \
    > + .off = 0, \
    > + .imm = IMM })
    > +
    > +/* Memory load, dst_reg = *(uint *) (src_reg + off16) */
    > +
    > +#define BPF_LDX_MEM(SIZE, DST, SRC, OFF) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_LDX | BPF_SIZE(SIZE) | BPF_MEM, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = OFF, \
    > + .imm = 0 })
    > +
    > +/* Memory store, *(uint *) (dst_reg + off16) = src_reg */
    > +
    > +#define BPF_STX_MEM(SIZE, DST, SRC, OFF) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_STX | BPF_SIZE(SIZE) | BPF_MEM, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = OFF, \
    > + .imm = 0 })
    > +
    > +/* Memory store, *(uint *) (dst_reg + off16) = imm32 */
    > +
    > +#define BPF_ST_MEM(SIZE, DST, OFF, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_ST | BPF_SIZE(SIZE) | BPF_MEM, \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = OFF, \
    > + .imm = IMM })
    > +
    > +/* Conditional jumps against registers,
    > + * if (dst_reg 'op' src_reg) goto pc + off16
    > + */
    > +
    > +#define BPF_JMP_REG(OP, DST, SRC, OFF) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_JMP | BPF_OP(OP) | BPF_X, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = OFF, \
    > + .imm = 0 })
    > +
    > +/* Conditional jumps against immediates,
    > + * if (dst_reg 'op' imm32) goto pc + off16
    > + */
    > +
    > +#define BPF_JMP_IMM(OP, DST, IMM, OFF) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_JMP | BPF_OP(OP) | BPF_K, \
    > + .dst_reg = DST, \
    > + .src_reg = 0, \
    > + .off = OFF, \
    > + .imm = IMM })
    > +
    > +/* Function call */
    > +
    > +#define BPF_EMIT_CALL(FUNC) \
    > + ((struct bpf_insn) { \
    > + .code = BPF_JMP | BPF_CALL, \
    > + .dst_reg = 0, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = ((FUNC) - BPF_FUNC_unspec) })
    > +
    > +/* Raw code statement block */
    > +
    > +#define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \
    > + ((struct bpf_insn) { \
    > + .code = CODE, \
    > + .dst_reg = DST, \
    > + .src_reg = SRC, \
    > + .off = OFF, \
    > + .imm = IMM })
    > +
    > +/* Program exit */
    > +
    > +#define BPF_EXIT_INSN() \
    > + ((struct bpf_insn) { \
    > + .code = BPF_JMP | BPF_EXIT, \
    > + .dst_reg = 0, \
    > + .src_reg = 0, \
    > + .off = 0, \
    > + .imm = 0 })
    > +
    > +#endif /* __TOOLS_LINUX_FILTER_H */
    > diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
    > index 56fe0c9..14e8b98 100644
    > --- a/tools/perf/MANIFEST
    > +++ b/tools/perf/MANIFEST
    > @@ -42,6 +42,7 @@ tools/include/asm-generic/bitops.h
    > tools/include/linux/atomic.h
    > tools/include/linux/bitops.h
    > tools/include/linux/compiler.h
    > +tools/include/linux/filter.h
    > tools/include/linux/hash.h
    > tools/include/linux/kernel.h
    > tools/include/linux/list.h
    > --
    > 2.1.0


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