diff options
Diffstat (limited to 'include/asm-i386/alternative.h')
| -rw-r--r-- | include/asm-i386/alternative.h | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/include/asm-i386/alternative.h b/include/asm-i386/alternative.h index b8fa9557c53..0f70b379b02 100644 --- a/include/asm-i386/alternative.h +++ b/include/asm-i386/alternative.h @@ -1,8 +1,6 @@ #ifndef _I386_ALTERNATIVE_H #define _I386_ALTERNATIVE_H -#ifdef __KERNEL__ - #include <asm/types.h> #include <linux/stddef.h> #include <linux/types.h> @@ -16,6 +14,7 @@ struct alt_instr { u8 pad; }; +extern void alternative_instructions(void); extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end); struct module; @@ -31,9 +30,7 @@ static inline void alternatives_smp_module_add(struct module *mod, char *name, void *text, void *text_end) {} static inline void alternatives_smp_module_del(struct module *mod) {} static inline void alternatives_smp_switch(int smp) {} -#endif - -#endif +#endif /* CONFIG_SMP */ /* * Alternative instructions for different CPU types or capabilities. @@ -85,6 +82,21 @@ static inline void alternatives_smp_switch(int smp) {} "663:\n\t" newinstr "\n664:\n" /* replacement */\ ".previous" :: "i" (feature), ##input) +/* Like alternative_input, but with a single output argument */ +#define alternative_io(oldinstr, newinstr, feature, output, input...) \ + asm volatile ("661:\n\t" oldinstr "\n662:\n" \ + ".section .altinstructions,\"a\"\n" \ + " .align 4\n" \ + " .long 661b\n" /* label */ \ + " .long 663f\n" /* new instruction */ \ + " .byte %c[feat]\n" /* feature bit */ \ + " .byte 662b-661b\n" /* sourcelen */ \ + " .byte 664f-663f\n" /* replacementlen */ \ + ".previous\n" \ + ".section .altinstr_replacement,\"ax\"\n" \ + "663:\n\t" newinstr "\n664:\n" /* replacement */ \ + ".previous" : output : [feat] "i" (feature), ##input) + /* * Alternative inline assembly for SMP. * @@ -118,15 +130,17 @@ static inline void alternatives_smp_switch(int smp) {} #define LOCK_PREFIX "" #endif -struct paravirt_patch; +struct paravirt_patch_site; #ifdef CONFIG_PARAVIRT -void apply_paravirt(struct paravirt_patch *start, struct paravirt_patch *end); +void apply_paravirt(struct paravirt_patch_site *start, + struct paravirt_patch_site *end); #else static inline void -apply_paravirt(struct paravirt_patch *start, struct paravirt_patch *end) +apply_paravirt(struct paravirt_patch_site *start, + struct paravirt_patch_site *end) {} -#define __start_parainstructions NULL -#define __stop_parainstructions NULL +#define __parainstructions NULL +#define __parainstructions_end NULL #endif #endif /* _I386_ALTERNATIVE_H */ |