^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _ASM_X86_NOPS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _ASM_X86_NOPS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Define nops for use with alternative() and for tracing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * *_NOP5_ATOMIC must be a single instruction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define NOP_DS_PREFIX 0x3e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* generic versions from gas
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 1: nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) the following instructions are NOT nops in 64-bit mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) for 64-bit mode use K8 or P6 nops instead
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 2: movl %esi,%esi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 3: leal 0x00(%esi),%esi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 4: leal 0x00(,%esi,1),%esi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 6: leal 0x00000000(%esi),%esi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 7: leal 0x00000000(,%esi,1),%esi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define GENERIC_NOP1 0x90
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define GENERIC_NOP2 0x89,0xf6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define GENERIC_NOP3 0x8d,0x76,0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define GENERIC_NOP4 0x8d,0x74,0x26,0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define GENERIC_NOP5 GENERIC_NOP1,GENERIC_NOP4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define GENERIC_NOP6 0x8d,0xb6,0x00,0x00,0x00,0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define GENERIC_NOP7 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define GENERIC_NOP8 GENERIC_NOP1,GENERIC_NOP7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define GENERIC_NOP5_ATOMIC NOP_DS_PREFIX,GENERIC_NOP4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /* Opteron 64bit nops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 1: nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 2: osp nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 3: osp osp nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 4: osp osp osp nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define K8_NOP1 GENERIC_NOP1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define K8_NOP2 0x66,K8_NOP1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define K8_NOP3 0x66,K8_NOP2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define K8_NOP4 0x66,K8_NOP3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define K8_NOP5 K8_NOP3,K8_NOP2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define K8_NOP6 K8_NOP3,K8_NOP3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define K8_NOP7 K8_NOP4,K8_NOP3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define K8_NOP8 K8_NOP4,K8_NOP4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define K8_NOP5_ATOMIC 0x66,K8_NOP4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* K7 nops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) uses eax dependencies (arbitrary choice)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 1: nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 2: movl %eax,%eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 3: leal (,%eax,1),%eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 4: leal 0x00(,%eax,1),%eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 6: leal 0x00000000(%eax),%eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 7: leal 0x00000000(,%eax,1),%eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define K7_NOP1 GENERIC_NOP1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define K7_NOP2 0x8b,0xc0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define K7_NOP3 0x8d,0x04,0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define K7_NOP4 0x8d,0x44,0x20,0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define K7_NOP5 K7_NOP4,K7_NOP1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define K7_NOP6 0x8d,0x80,0,0,0,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define K7_NOP7 0x8D,0x04,0x05,0,0,0,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define K7_NOP8 K7_NOP7,K7_NOP1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define K7_NOP5_ATOMIC NOP_DS_PREFIX,K7_NOP4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* P6 nops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) uses eax dependencies (Intel-recommended choice)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 1: nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 2: osp nop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 3: nopl (%eax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 4: nopl 0x00(%eax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 5: nopl 0x00(%eax,%eax,1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 6: osp nopl 0x00(%eax,%eax,1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 7: nopl 0x00000000(%eax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 8: nopl 0x00000000(%eax,%eax,1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) Note: All the above are assumed to be a single instruction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) There is kernel code that depends on this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define P6_NOP1 GENERIC_NOP1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define P6_NOP2 0x66,0x90
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define P6_NOP3 0x0f,0x1f,0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define P6_NOP4 0x0f,0x1f,0x40,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define P6_NOP5 0x0f,0x1f,0x44,0x00,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define P6_NOP6 0x66,0x0f,0x1f,0x44,0x00,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define P6_NOP7 0x0f,0x1f,0x80,0,0,0,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define P6_NOP8 0x0f,0x1f,0x84,0x00,0,0,0,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #define P6_NOP5_ATOMIC P6_NOP5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #ifdef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define _ASM_MK_NOP(x) .byte x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define _ASM_MK_NOP(x) ".byte " __stringify(x) "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #if defined(CONFIG_MK7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #define ASM_NOP1 _ASM_MK_NOP(K7_NOP1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define ASM_NOP2 _ASM_MK_NOP(K7_NOP2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define ASM_NOP3 _ASM_MK_NOP(K7_NOP3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #define ASM_NOP4 _ASM_MK_NOP(K7_NOP4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define ASM_NOP5 _ASM_MK_NOP(K7_NOP5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define ASM_NOP6 _ASM_MK_NOP(K7_NOP6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define ASM_NOP7 _ASM_MK_NOP(K7_NOP7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define ASM_NOP8 _ASM_MK_NOP(K7_NOP8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define ASM_NOP5_ATOMIC _ASM_MK_NOP(K7_NOP5_ATOMIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #elif defined(CONFIG_X86_P6_NOP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define ASM_NOP1 _ASM_MK_NOP(P6_NOP1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define ASM_NOP2 _ASM_MK_NOP(P6_NOP2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define ASM_NOP3 _ASM_MK_NOP(P6_NOP3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define ASM_NOP4 _ASM_MK_NOP(P6_NOP4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define ASM_NOP5 _ASM_MK_NOP(P6_NOP5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define ASM_NOP6 _ASM_MK_NOP(P6_NOP6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define ASM_NOP7 _ASM_MK_NOP(P6_NOP7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define ASM_NOP8 _ASM_MK_NOP(P6_NOP8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define ASM_NOP5_ATOMIC _ASM_MK_NOP(P6_NOP5_ATOMIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #elif defined(CONFIG_X86_64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define ASM_NOP1 _ASM_MK_NOP(K8_NOP1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define ASM_NOP2 _ASM_MK_NOP(K8_NOP2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define ASM_NOP3 _ASM_MK_NOP(K8_NOP3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define ASM_NOP4 _ASM_MK_NOP(K8_NOP4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define ASM_NOP5 _ASM_MK_NOP(K8_NOP5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define ASM_NOP6 _ASM_MK_NOP(K8_NOP6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define ASM_NOP7 _ASM_MK_NOP(K8_NOP7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define ASM_NOP8 _ASM_MK_NOP(K8_NOP8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define ASM_NOP5_ATOMIC _ASM_MK_NOP(K8_NOP5_ATOMIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define ASM_NOP1 _ASM_MK_NOP(GENERIC_NOP1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define ASM_NOP2 _ASM_MK_NOP(GENERIC_NOP2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define ASM_NOP3 _ASM_MK_NOP(GENERIC_NOP3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #define ASM_NOP4 _ASM_MK_NOP(GENERIC_NOP4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define ASM_NOP5 _ASM_MK_NOP(GENERIC_NOP5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define ASM_NOP6 _ASM_MK_NOP(GENERIC_NOP6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define ASM_NOP7 _ASM_MK_NOP(GENERIC_NOP7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define ASM_NOP8 _ASM_MK_NOP(GENERIC_NOP8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define ASM_NOP5_ATOMIC _ASM_MK_NOP(GENERIC_NOP5_ATOMIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define ASM_NOP_MAX 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #define NOP_ATOMIC5 (ASM_NOP_MAX+1) /* Entry for the 5-byte atomic NOP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) extern const unsigned char * const *ideal_nops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) extern void arch_init_ideal_nops(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #endif /* _ASM_X86_NOPS_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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