projects / thirdparty / kernel / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 05462310 MH |
2 | /* |
| 3 | * BPF Jit compiler defines | |
| 4 | * | |
| 5 | * Copyright IBM Corp. 2012,2015 | |
| 6 | * | |
| 7 | * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| 8 | * Michael Holzheu <holzheu@linux.vnet.ibm.com> | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef __ARCH_S390_NET_BPF_JIT_H | |
| 12 | #define __ARCH_S390_NET_BPF_JIT_H | |
| 13 | ||
| 14 | #ifndef __ASSEMBLY__ | |
| 15 | ||
| 16 | #include <linux/filter.h> | |
| 17 | #include <linux/types.h> | |
| 18 | ||
| 19 | extern u8 sk_load_word_pos[], sk_load_half_pos[], sk_load_byte_pos[]; | |
| 20 | extern u8 sk_load_word[], sk_load_half[], sk_load_byte[]; | |
| 21 | ||
| 22 | #endif /* __ASSEMBLY__ */ | |
| 23 | ||
| 24 | /* | |
| 25 | * Stackframe layout (packed stack): | |
| 26 | * | |
| 27 | * ^ high | |
| 28 | * +---------------+ | | |
| 29 | * | old backchain | | | |
| 30 | * +---------------+ | | |
| 31 | * | r15 - r6 | | | |
| 6651ee07 MH |
32 | * +---------------+ | |
| 33 | * | 4 byte align | | | |
| 34 | * | tail_call_cnt | | | |
| 05462310 MH |
35 | * BFP -> +===============+ | |
| 36 | * | | | | |
| 37 | * | BPF stack | | | |
| 38 | * | | | | |
| 39 | * +---------------+ | | |
| 9db7f2b8 | 40 | * | 8 byte skbp | | |
| 6edf0aa4 | 41 | * R15+176 -> +---------------+ | |
| 05462310 MH |
42 | * | 8 byte hlen | | |
| 43 | * R15+168 -> +---------------+ | | |
| 44 | * | 4 byte align | | | |
| 45 | * +---------------+ | | |
| 46 | * | 4 byte temp | | | |
| 47 | * | for bpf_jit.S | | | |
| 48 | * R15+160 -> +---------------+ | | |
| 49 | * | new backchain | | | |
| 50 | * R15+152 -> +---------------+ | | |
| 51 | * | + 152 byte SA | | | |
| 52 | * R15 -> +---------------+ + low | |
| 53 | * | |
| 54 | * We get 160 bytes stack space from calling function, but only use | |
| 6651ee07 | 55 | * 12 * 8 byte for old backchain, r15..r6, and tail_call_cnt. |
| 05462310 | 56 | */ |
| 9db7f2b8 | 57 | #define STK_SPACE (MAX_BPF_STACK + 8 + 8 + 4 + 4 + 160) |
| 6651ee07 | 58 | #define STK_160_UNUSED (160 - 12 * 8) |
| bbac1c94 | 59 | #define STK_OFF (STK_SPACE - STK_160_UNUSED) |
| 05462310 MH |
60 | #define STK_OFF_TMP 160 /* Offset of tmp buffer on stack */ |
| 61 | #define STK_OFF_HLEN 168 /* Offset of SKB header length on stack */ | |
| 6edf0aa4 | 62 | #define STK_OFF_SKBP 176 /* Offset of SKB pointer on stack */ |
| 05462310 | 63 | |
| 6651ee07 MH |
64 | #define STK_OFF_R6 (160 - 11 * 8) /* Offset of r6 on stack */ |
| 65 | #define STK_OFF_TCCNT (160 - 12 * 8) /* Offset of tail_call_cnt on stack */ | |
| 66 | ||
| 05462310 MH |
67 | /* Offset to skip condition code check */ |
| 68 | #define OFF_OK 4 | |
| 69 | ||
| 70 | #endif /* __ARCH_S390_NET_BPF_JIT_H */ |