diff options
author | H. Peter Anvin <hpa@zytor.com> | 2008-01-30 07:30:30 -0500 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 07:30:30 -0500 |
commit | 6b59257082e136fbbce1aa017575a451c0df0592 (patch) | |
tree | 0e56f92a7b94556f9e1f429e5623c1b9c430bed5 /include/asm-x86 | |
parent | 1d8a1f6b51f6b195dfdcf05821be97edede5664a (diff) |
x86: actually merge <asm/alternative.h>
This actually merges <asm-x86/alternative_{32,64}.h> into
<asm-x86/alternative.h>.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86')
-rw-r--r-- | include/asm-x86/alternative.h | 162 | ||||
-rw-r--r-- | include/asm-x86/alternative_32.h | 161 | ||||
-rw-r--r-- | include/asm-x86/alternative_64.h | 161 |
3 files changed, 159 insertions, 325 deletions
diff --git a/include/asm-x86/alternative.h b/include/asm-x86/alternative.h index 9eef6a32a130..d8bacf3c4b08 100644 --- a/include/asm-x86/alternative.h +++ b/include/asm-x86/alternative.h | |||
@@ -1,5 +1,161 @@ | |||
1 | #ifdef CONFIG_X86_32 | 1 | #ifndef _ASM_X86_ALTERNATIVE_H |
2 | # include "alternative_32.h" | 2 | #define _ASM_X86_ALTERNATIVE_H |
3 | |||
4 | #include <linux/types.h> | ||
5 | #include <linux/stddef.h> | ||
6 | #include <asm/asm.h> | ||
7 | |||
8 | /* | ||
9 | * Alternative inline assembly for SMP. | ||
10 | * | ||
11 | * The LOCK_PREFIX macro defined here replaces the LOCK and | ||
12 | * LOCK_PREFIX macros used everywhere in the source tree. | ||
13 | * | ||
14 | * SMP alternatives use the same data structures as the other | ||
15 | * alternatives and the X86_FEATURE_UP flag to indicate the case of a | ||
16 | * UP system running a SMP kernel. The existing apply_alternatives() | ||
17 | * works fine for patching a SMP kernel for UP. | ||
18 | * | ||
19 | * The SMP alternative tables can be kept after boot and contain both | ||
20 | * UP and SMP versions of the instructions to allow switching back to | ||
21 | * SMP at runtime, when hotplugging in a new CPU, which is especially | ||
22 | * useful in virtualized environments. | ||
23 | * | ||
24 | * The very common lock prefix is handled as special case in a | ||
25 | * separate table which is a pure address list without replacement ptr | ||
26 | * and size information. That keeps the table sizes small. | ||
27 | */ | ||
28 | |||
29 | #ifdef CONFIG_SMP | ||
30 | #define LOCK_PREFIX \ | ||
31 | ".section .smp_locks,\"a\"\n" \ | ||
32 | _ASM_ALIGN "\n" \ | ||
33 | _ASM_PTR "661f\n" /* address */ \ | ||
34 | ".previous\n" \ | ||
35 | "661:\n\tlock; " | ||
36 | |||
37 | #else /* ! CONFIG_SMP */ | ||
38 | #define LOCK_PREFIX "" | ||
39 | #endif | ||
40 | |||
41 | /* This must be included *after* the definition of LOCK_PREFIX */ | ||
42 | #include <asm/cpufeature.h> | ||
43 | |||
44 | struct alt_instr { | ||
45 | u8 *instr; /* original instruction */ | ||
46 | u8 *replacement; | ||
47 | u8 cpuid; /* cpuid bit set for replacement */ | ||
48 | u8 instrlen; /* length of original instruction */ | ||
49 | u8 replacementlen; /* length of new instruction, <= instrlen */ | ||
50 | u8 pad1; | ||
51 | #ifdef CONFIG_X86_64 | ||
52 | u32 pad2; | ||
53 | #endif | ||
54 | }; | ||
55 | |||
56 | extern void alternative_instructions(void); | ||
57 | extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end); | ||
58 | |||
59 | struct module; | ||
60 | |||
61 | #ifdef CONFIG_SMP | ||
62 | extern void alternatives_smp_module_add(struct module *mod, char *name, | ||
63 | void *locks, void *locks_end, | ||
64 | void *text, void *text_end); | ||
65 | extern void alternatives_smp_module_del(struct module *mod); | ||
66 | extern void alternatives_smp_switch(int smp); | ||
67 | #else | ||
68 | static inline void alternatives_smp_module_add(struct module *mod, char *name, | ||
69 | void *locks, void *locks_end, | ||
70 | void *text, void *text_end) {} | ||
71 | static inline void alternatives_smp_module_del(struct module *mod) {} | ||
72 | static inline void alternatives_smp_switch(int smp) {} | ||
73 | #endif /* CONFIG_SMP */ | ||
74 | |||
75 | /* | ||
76 | * Alternative instructions for different CPU types or capabilities. | ||
77 | * | ||
78 | * This allows to use optimized instructions even on generic binary | ||
79 | * kernels. | ||
80 | * | ||
81 | * length of oldinstr must be longer or equal the length of newinstr | ||
82 | * It can be padded with nops as needed. | ||
83 | * | ||
84 | * For non barrier like inlines please define new variants | ||
85 | * without volatile and memory clobber. | ||
86 | */ | ||
87 | #define alternative(oldinstr, newinstr, feature) \ | ||
88 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
89 | ".section .altinstructions,\"a\"\n" \ | ||
90 | _ASM_ALIGN "\n" \ | ||
91 | _ASM_PTR "661b\n" /* label */ \ | ||
92 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
93 | " .byte %c0\n" /* feature bit */ \ | ||
94 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
95 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
96 | ".previous\n" \ | ||
97 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
98 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
99 | ".previous" :: "i" (feature) : "memory") | ||
100 | |||
101 | /* | ||
102 | * Alternative inline assembly with input. | ||
103 | * | ||
104 | * Pecularities: | ||
105 | * No memory clobber here. | ||
106 | * Argument numbers start with 1. | ||
107 | * Best is to use constraints that are fixed size (like (%1) ... "r") | ||
108 | * If you use variable sized constraints like "m" or "g" in the | ||
109 | * replacement make sure to pad to the worst case length. | ||
110 | */ | ||
111 | #define alternative_input(oldinstr, newinstr, feature, input...) \ | ||
112 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
113 | ".section .altinstructions,\"a\"\n" \ | ||
114 | _ASM_ALIGN "\n" \ | ||
115 | _ASM_PTR "661b\n" /* label */ \ | ||
116 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
117 | " .byte %c0\n" /* feature bit */ \ | ||
118 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
119 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
120 | ".previous\n" \ | ||
121 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
122 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
123 | ".previous" :: "i" (feature), ##input) | ||
124 | |||
125 | /* Like alternative_input, but with a single output argument */ | ||
126 | #define alternative_io(oldinstr, newinstr, feature, output, input...) \ | ||
127 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
128 | ".section .altinstructions,\"a\"\n" \ | ||
129 | _ASM_ALIGN "\n" \ | ||
130 | _ASM_PTR "661b\n" /* label */ \ | ||
131 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
132 | " .byte %c[feat]\n" /* feature bit */ \ | ||
133 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
134 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
135 | ".previous\n" \ | ||
136 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
137 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
138 | ".previous" : output : [feat] "i" (feature), ##input) | ||
139 | |||
140 | /* | ||
141 | * use this macro(s) if you need more than one output parameter | ||
142 | * in alternative_io | ||
143 | */ | ||
144 | #define ASM_OUTPUT2(a, b) a, b | ||
145 | |||
146 | struct paravirt_patch_site; | ||
147 | #ifdef CONFIG_PARAVIRT | ||
148 | void apply_paravirt(struct paravirt_patch_site *start, | ||
149 | struct paravirt_patch_site *end); | ||
3 | #else | 150 | #else |
4 | # include "alternative_64.h" | 151 | static inline void |
152 | apply_paravirt(struct paravirt_patch_site *start, | ||
153 | struct paravirt_patch_site *end) | ||
154 | {} | ||
155 | #define __parainstructions NULL | ||
156 | #define __parainstructions_end NULL | ||
5 | #endif | 157 | #endif |
158 | |||
159 | extern void text_poke(void *addr, unsigned char *opcode, int len); | ||
160 | |||
161 | #endif /* _ASM_X86_ALTERNATIVE_H */ | ||
diff --git a/include/asm-x86/alternative_32.h b/include/asm-x86/alternative_32.h deleted file mode 100644 index 4919b5ee8b9f..000000000000 --- a/include/asm-x86/alternative_32.h +++ /dev/null | |||
@@ -1,161 +0,0 @@ | |||
1 | #ifndef _I386_ALTERNATIVE_H | ||
2 | #define _I386_ALTERNATIVE_H | ||
3 | |||
4 | #include <linux/types.h> | ||
5 | #include <linux/stddef.h> | ||
6 | #include <asm/asm.h> | ||
7 | |||
8 | /* | ||
9 | * Alternative inline assembly for SMP. | ||
10 | * | ||
11 | * The LOCK_PREFIX macro defined here replaces the LOCK and | ||
12 | * LOCK_PREFIX macros used everywhere in the source tree. | ||
13 | * | ||
14 | * SMP alternatives use the same data structures as the other | ||
15 | * alternatives and the X86_FEATURE_UP flag to indicate the case of a | ||
16 | * UP system running a SMP kernel. The existing apply_alternatives() | ||
17 | * works fine for patching a SMP kernel for UP. | ||
18 | * | ||
19 | * The SMP alternative tables can be kept after boot and contain both | ||
20 | * UP and SMP versions of the instructions to allow switching back to | ||
21 | * SMP at runtime, when hotplugging in a new CPU, which is especially | ||
22 | * useful in virtualized environments. | ||
23 | * | ||
24 | * The very common lock prefix is handled as special case in a | ||
25 | * separate table which is a pure address list without replacement ptr | ||
26 | * and size information. That keeps the table sizes small. | ||
27 | */ | ||
28 | |||
29 | #ifdef CONFIG_SMP | ||
30 | #define LOCK_PREFIX \ | ||
31 | ".section .smp_locks,\"a\"\n" \ | ||
32 | _ASM_ALIGN "\n" \ | ||
33 | _ASM_PTR "661f\n" /* address */ \ | ||
34 | ".previous\n" \ | ||
35 | "661:\n\tlock; " | ||
36 | |||
37 | #else /* ! CONFIG_SMP */ | ||
38 | #define LOCK_PREFIX "" | ||
39 | #endif | ||
40 | |||
41 | /* This must be included *after* the definition of LOCK_PREFIX */ | ||
42 | #include <asm/cpufeature.h> | ||
43 | |||
44 | struct alt_instr { | ||
45 | u8 *instr; /* original instruction */ | ||
46 | u8 *replacement; | ||
47 | u8 cpuid; /* cpuid bit set for replacement */ | ||
48 | u8 instrlen; /* length of original instruction */ | ||
49 | u8 replacementlen; /* length of new instruction, <= instrlen */ | ||
50 | u8 pad1; | ||
51 | #ifdef CONFIG_X86_64 | ||
52 | u32 pad2; | ||
53 | #endif | ||
54 | }; | ||
55 | |||
56 | extern void alternative_instructions(void); | ||
57 | extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end); | ||
58 | |||
59 | struct module; | ||
60 | |||
61 | #ifdef CONFIG_SMP | ||
62 | extern void alternatives_smp_module_add(struct module *mod, char *name, | ||
63 | void *locks, void *locks_end, | ||
64 | void *text, void *text_end); | ||
65 | extern void alternatives_smp_module_del(struct module *mod); | ||
66 | extern void alternatives_smp_switch(int smp); | ||
67 | #else | ||
68 | static inline void alternatives_smp_module_add(struct module *mod, char *name, | ||
69 | void *locks, void *locks_end, | ||
70 | void *text, void *text_end) {} | ||
71 | static inline void alternatives_smp_module_del(struct module *mod) {} | ||
72 | static inline void alternatives_smp_switch(int smp) {} | ||
73 | #endif /* CONFIG_SMP */ | ||
74 | |||
75 | /* | ||
76 | * Alternative instructions for different CPU types or capabilities. | ||
77 | * | ||
78 | * This allows to use optimized instructions even on generic binary | ||
79 | * kernels. | ||
80 | * | ||
81 | * length of oldinstr must be longer or equal the length of newinstr | ||
82 | * It can be padded with nops as needed. | ||
83 | * | ||
84 | * For non barrier like inlines please define new variants | ||
85 | * without volatile and memory clobber. | ||
86 | */ | ||
87 | #define alternative(oldinstr, newinstr, feature) \ | ||
88 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
89 | ".section .altinstructions,\"a\"\n" \ | ||
90 | _ASM_ALIGN "\n" \ | ||
91 | _ASM_PTR "661b\n" /* label */ \ | ||
92 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
93 | " .byte %c0\n" /* feature bit */ \ | ||
94 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
95 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
96 | ".previous\n" \ | ||
97 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
98 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
99 | ".previous" :: "i" (feature) : "memory") | ||
100 | |||
101 | /* | ||
102 | * Alternative inline assembly with input. | ||
103 | * | ||
104 | * Pecularities: | ||
105 | * No memory clobber here. | ||
106 | * Argument numbers start with 1. | ||
107 | * Best is to use constraints that are fixed size (like (%1) ... "r") | ||
108 | * If you use variable sized constraints like "m" or "g" in the | ||
109 | * replacement make sure to pad to the worst case length. | ||
110 | */ | ||
111 | #define alternative_input(oldinstr, newinstr, feature, input...) \ | ||
112 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
113 | ".section .altinstructions,\"a\"\n" \ | ||
114 | _ASM_ALIGN "\n" \ | ||
115 | _ASM_PTR "661b\n" /* label */ \ | ||
116 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
117 | " .byte %c0\n" /* feature bit */ \ | ||
118 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
119 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
120 | ".previous\n" \ | ||
121 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
122 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
123 | ".previous" :: "i" (feature), ##input) | ||
124 | |||
125 | /* Like alternative_input, but with a single output argument */ | ||
126 | #define alternative_io(oldinstr, newinstr, feature, output, input...) \ | ||
127 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
128 | ".section .altinstructions,\"a\"\n" \ | ||
129 | _ASM_ALIGN "\n" \ | ||
130 | _ASM_PTR "661b\n" /* label */ \ | ||
131 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
132 | " .byte %c[feat]\n" /* feature bit */ \ | ||
133 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
134 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
135 | ".previous\n" \ | ||
136 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
137 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
138 | ".previous" : output : [feat] "i" (feature), ##input) | ||
139 | |||
140 | /* | ||
141 | * use this macro(s) if you need more than one output parameter | ||
142 | * in alternative_io | ||
143 | */ | ||
144 | #define ASM_OUTPUT2(a, b) a, b | ||
145 | |||
146 | struct paravirt_patch_site; | ||
147 | #ifdef CONFIG_PARAVIRT | ||
148 | void apply_paravirt(struct paravirt_patch_site *start, | ||
149 | struct paravirt_patch_site *end); | ||
150 | #else | ||
151 | static inline void | ||
152 | apply_paravirt(struct paravirt_patch_site *start, | ||
153 | struct paravirt_patch_site *end) | ||
154 | {} | ||
155 | #define __parainstructions NULL | ||
156 | #define __parainstructions_end NULL | ||
157 | #endif | ||
158 | |||
159 | extern void text_poke(void *addr, unsigned char *opcode, int len); | ||
160 | |||
161 | #endif /* _I386_ALTERNATIVE_H */ | ||
diff --git a/include/asm-x86/alternative_64.h b/include/asm-x86/alternative_64.h deleted file mode 100644 index 50efcebae33f..000000000000 --- a/include/asm-x86/alternative_64.h +++ /dev/null | |||
@@ -1,161 +0,0 @@ | |||
1 | #ifndef _X86_64_ALTERNATIVE_H | ||
2 | #define _X86_64_ALTERNATIVE_H | ||
3 | |||
4 | #include <linux/types.h> | ||
5 | #include <linux/stddef.h> | ||
6 | #include <asm/asm.h> | ||
7 | |||
8 | /* | ||
9 | * Alternative inline assembly for SMP. | ||
10 | * | ||
11 | * The LOCK_PREFIX macro defined here replaces the LOCK and | ||
12 | * LOCK_PREFIX macros used everywhere in the source tree. | ||
13 | * | ||
14 | * SMP alternatives use the same data structures as the other | ||
15 | * alternatives and the X86_FEATURE_UP flag to indicate the case of a | ||
16 | * UP system running a SMP kernel. The existing apply_alternatives() | ||
17 | * works fine for patching a SMP kernel for UP. | ||
18 | * | ||
19 | * The SMP alternative tables can be kept after boot and contain both | ||
20 | * UP and SMP versions of the instructions to allow switching back to | ||
21 | * SMP at runtime, when hotplugging in a new CPU, which is especially | ||
22 | * useful in virtualized environments. | ||
23 | * | ||
24 | * The very common lock prefix is handled as special case in a | ||
25 | * separate table which is a pure address list without replacement ptr | ||
26 | * and size information. That keeps the table sizes small. | ||
27 | */ | ||
28 | |||
29 | #ifdef CONFIG_SMP | ||
30 | #define LOCK_PREFIX \ | ||
31 | ".section .smp_locks,\"a\"\n" \ | ||
32 | _ASM_ALIGN "\n" \ | ||
33 | _ASM_PTR "661f\n" /* address */ \ | ||
34 | ".previous\n" \ | ||
35 | "661:\n\tlock; " | ||
36 | |||
37 | #else /* ! CONFIG_SMP */ | ||
38 | #define LOCK_PREFIX "" | ||
39 | #endif | ||
40 | |||
41 | /* This must be included *after* the definition of LOCK_PREFIX */ | ||
42 | #include <asm/cpufeature.h> | ||
43 | |||
44 | struct alt_instr { | ||
45 | u8 *instr; /* original instruction */ | ||
46 | u8 *replacement; | ||
47 | u8 cpuid; /* cpuid bit set for replacement */ | ||
48 | u8 instrlen; /* length of original instruction */ | ||
49 | u8 replacementlen; /* length of new instruction, <= instrlen */ | ||
50 | u8 pad1; | ||
51 | #ifdef CONFIG_X86_64 | ||
52 | u32 pad2; | ||
53 | #endif | ||
54 | }; | ||
55 | |||
56 | extern void alternative_instructions(void); | ||
57 | extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end); | ||
58 | |||
59 | struct module; | ||
60 | |||
61 | #ifdef CONFIG_SMP | ||
62 | extern void alternatives_smp_module_add(struct module *mod, char *name, | ||
63 | void *locks, void *locks_end, | ||
64 | void *text, void *text_end); | ||
65 | extern void alternatives_smp_module_del(struct module *mod); | ||
66 | extern void alternatives_smp_switch(int smp); | ||
67 | #else | ||
68 | static inline void alternatives_smp_module_add(struct module *mod, char *name, | ||
69 | void *locks, void *locks_end, | ||
70 | void *text, void *text_end) {} | ||
71 | static inline void alternatives_smp_module_del(struct module *mod) {} | ||
72 | static inline void alternatives_smp_switch(int smp) {} | ||
73 | #endif /* CONFIG_SMP */ | ||
74 | |||
75 | /* | ||
76 | * Alternative instructions for different CPU types or capabilities. | ||
77 | * | ||
78 | * This allows to use optimized instructions even on generic binary | ||
79 | * kernels. | ||
80 | * | ||
81 | * length of oldinstr must be longer or equal the length of newinstr | ||
82 | * It can be padded with nops as needed. | ||
83 | * | ||
84 | * For non barrier like inlines please define new variants | ||
85 | * without volatile and memory clobber. | ||
86 | */ | ||
87 | #define alternative(oldinstr, newinstr, feature) \ | ||
88 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
89 | ".section .altinstructions,\"a\"\n" \ | ||
90 | _ASM_ALIGN "\n" \ | ||
91 | _ASM_PTR "661b\n" /* label */ \ | ||
92 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
93 | " .byte %c0\n" /* feature bit */ \ | ||
94 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
95 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
96 | ".previous\n" \ | ||
97 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
98 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
99 | ".previous" :: "i" (feature) : "memory") | ||
100 | |||
101 | /* | ||
102 | * Alternative inline assembly with input. | ||
103 | * | ||
104 | * Pecularities: | ||
105 | * No memory clobber here. | ||
106 | * Argument numbers start with 1. | ||
107 | * Best is to use constraints that are fixed size (like (%1) ... "r") | ||
108 | * If you use variable sized constraints like "m" or "g" in the | ||
109 | * replacement make sure to pad to the worst case length. | ||
110 | */ | ||
111 | #define alternative_input(oldinstr, newinstr, feature, input...) \ | ||
112 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
113 | ".section .altinstructions,\"a\"\n" \ | ||
114 | _ASM_ALIGN "\n" \ | ||
115 | _ASM_PTR "661b\n" /* label */ \ | ||
116 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
117 | " .byte %c0\n" /* feature bit */ \ | ||
118 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
119 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
120 | ".previous\n" \ | ||
121 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
122 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
123 | ".previous" :: "i" (feature), ##input) | ||
124 | |||
125 | /* Like alternative_input, but with a single output argument */ | ||
126 | #define alternative_io(oldinstr, newinstr, feature, output, input...) \ | ||
127 | asm volatile ("661:\n\t" oldinstr "\n662:\n" \ | ||
128 | ".section .altinstructions,\"a\"\n" \ | ||
129 | _ASM_ALIGN "\n" \ | ||
130 | _ASM_PTR "661b\n" /* label */ \ | ||
131 | _ASM_PTR "663f\n" /* new instruction */ \ | ||
132 | " .byte %c[feat]\n" /* feature bit */ \ | ||
133 | " .byte 662b-661b\n" /* sourcelen */ \ | ||
134 | " .byte 664f-663f\n" /* replacementlen */ \ | ||
135 | ".previous\n" \ | ||
136 | ".section .altinstr_replacement,\"ax\"\n" \ | ||
137 | "663:\n\t" newinstr "\n664:\n" /* replacement */ \ | ||
138 | ".previous" : output : [feat] "i" (feature), ##input) | ||
139 | |||
140 | /* | ||
141 | * use this macro(s) if you need more than one output parameter | ||
142 | * in alternative_io | ||
143 | */ | ||
144 | #define ASM_OUTPUT2(a, b) a, b | ||
145 | |||
146 | struct paravirt_patch_site; | ||
147 | #ifdef CONFIG_PARAVIRT | ||
148 | void apply_paravirt(struct paravirt_patch_site *start, | ||
149 | struct paravirt_patch_site *end); | ||
150 | #else | ||
151 | static inline void | ||
152 | apply_paravirt(struct paravirt_patch_site *start, | ||
153 | struct paravirt_patch_site *end) | ||
154 | {} | ||
155 | #define __parainstructions NULL | ||
156 | #define __parainstructions_end NULL | ||
157 | #endif | ||
158 | |||
159 | extern void text_poke(void *addr, unsigned char *opcode, int len); | ||
160 | |||
161 | #endif /* _X86_64_ALTERNATIVE_H */ | ||