mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
H. Peter Anvin
Ingo Molnar
parent
1d8a1f6b51
commit
6b59257082
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@ -1,5 +1,161 @@
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#ifdef CONFIG_X86_32
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# include "alternative_32.h"
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#else
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# include "alternative_64.h"
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#ifndef _ASM_X86_ALTERNATIVE_H
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#define _ASM_X86_ALTERNATIVE_H
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#include <linux/types.h>
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#include <linux/stddef.h>
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#include <asm/asm.h>
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/*
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* Alternative inline assembly for SMP.
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*
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* The LOCK_PREFIX macro defined here replaces the LOCK and
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* LOCK_PREFIX macros used everywhere in the source tree.
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*
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* SMP alternatives use the same data structures as the other
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* alternatives and the X86_FEATURE_UP flag to indicate the case of a
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* UP system running a SMP kernel. The existing apply_alternatives()
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* works fine for patching a SMP kernel for UP.
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*
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* The SMP alternative tables can be kept after boot and contain both
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* UP and SMP versions of the instructions to allow switching back to
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* SMP at runtime, when hotplugging in a new CPU, which is especially
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* useful in virtualized environments.
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*
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* The very common lock prefix is handled as special case in a
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* separate table which is a pure address list without replacement ptr
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* and size information. That keeps the table sizes small.
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*/
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#ifdef CONFIG_SMP
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#define LOCK_PREFIX \
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".section .smp_locks,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661f\n" /* address */ \
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".previous\n" \
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"661:\n\tlock; "
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#else /* ! CONFIG_SMP */
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#define LOCK_PREFIX ""
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#endif
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/* This must be included *after* the definition of LOCK_PREFIX */
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#include <asm/cpufeature.h>
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struct alt_instr {
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u8 *instr; /* original instruction */
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u8 *replacement;
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u8 cpuid; /* cpuid bit set for replacement */
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u8 instrlen; /* length of original instruction */
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u8 replacementlen; /* length of new instruction, <= instrlen */
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u8 pad1;
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#ifdef CONFIG_X86_64
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u32 pad2;
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#endif
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};
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extern void alternative_instructions(void);
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extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
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struct module;
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#ifdef CONFIG_SMP
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extern void alternatives_smp_module_add(struct module *mod, char *name,
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void *locks, void *locks_end,
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void *text, void *text_end);
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extern void alternatives_smp_module_del(struct module *mod);
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extern void alternatives_smp_switch(int smp);
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#else
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static inline void alternatives_smp_module_add(struct module *mod, char *name,
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void *locks, void *locks_end,
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void *text, void *text_end) {}
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static inline void alternatives_smp_module_del(struct module *mod) {}
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static inline void alternatives_smp_switch(int smp) {}
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#endif /* CONFIG_SMP */
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/*
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* Alternative instructions for different CPU types or capabilities.
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*
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* This allows to use optimized instructions even on generic binary
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* kernels.
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*
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* length of oldinstr must be longer or equal the length of newinstr
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* It can be padded with nops as needed.
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*
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* For non barrier like inlines please define new variants
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* without volatile and memory clobber.
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*/
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#define alternative(oldinstr, newinstr, feature) \
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
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".section .altinstructions,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661b\n" /* label */ \
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_ASM_PTR "663f\n" /* new instruction */ \
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" .byte %c0\n" /* feature bit */ \
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" .byte 662b-661b\n" /* sourcelen */ \
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" .byte 664f-663f\n" /* replacementlen */ \
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".previous\n" \
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".section .altinstr_replacement,\"ax\"\n" \
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"663:\n\t" newinstr "\n664:\n" /* replacement */ \
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".previous" :: "i" (feature) : "memory")
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/*
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* Alternative inline assembly with input.
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*
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* Pecularities:
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* No memory clobber here.
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* Argument numbers start with 1.
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* Best is to use constraints that are fixed size (like (%1) ... "r")
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* If you use variable sized constraints like "m" or "g" in the
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* replacement make sure to pad to the worst case length.
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*/
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#define alternative_input(oldinstr, newinstr, feature, input...) \
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
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".section .altinstructions,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661b\n" /* label */ \
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_ASM_PTR "663f\n" /* new instruction */ \
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" .byte %c0\n" /* feature bit */ \
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" .byte 662b-661b\n" /* sourcelen */ \
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" .byte 664f-663f\n" /* replacementlen */ \
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".previous\n" \
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".section .altinstr_replacement,\"ax\"\n" \
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"663:\n\t" newinstr "\n664:\n" /* replacement */ \
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".previous" :: "i" (feature), ##input)
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/* Like alternative_input, but with a single output argument */
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#define alternative_io(oldinstr, newinstr, feature, output, input...) \
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
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".section .altinstructions,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661b\n" /* label */ \
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_ASM_PTR "663f\n" /* new instruction */ \
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" .byte %c[feat]\n" /* feature bit */ \
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" .byte 662b-661b\n" /* sourcelen */ \
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" .byte 664f-663f\n" /* replacementlen */ \
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".previous\n" \
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".section .altinstr_replacement,\"ax\"\n" \
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"663:\n\t" newinstr "\n664:\n" /* replacement */ \
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".previous" : output : [feat] "i" (feature), ##input)
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/*
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* use this macro(s) if you need more than one output parameter
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* in alternative_io
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*/
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#define ASM_OUTPUT2(a, b) a, b
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struct paravirt_patch_site;
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#ifdef CONFIG_PARAVIRT
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void apply_paravirt(struct paravirt_patch_site *start,
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struct paravirt_patch_site *end);
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#else
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static inline void
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apply_paravirt(struct paravirt_patch_site *start,
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struct paravirt_patch_site *end)
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{}
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#define __parainstructions NULL
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#define __parainstructions_end NULL
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#endif
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extern void text_poke(void *addr, unsigned char *opcode, int len);
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#endif /* _ASM_X86_ALTERNATIVE_H */
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@ -1,161 +0,0 @@
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#ifndef _I386_ALTERNATIVE_H
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#define _I386_ALTERNATIVE_H
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#include <linux/types.h>
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#include <linux/stddef.h>
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#include <asm/asm.h>
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/*
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* Alternative inline assembly for SMP.
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*
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* The LOCK_PREFIX macro defined here replaces the LOCK and
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* LOCK_PREFIX macros used everywhere in the source tree.
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*
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* SMP alternatives use the same data structures as the other
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* alternatives and the X86_FEATURE_UP flag to indicate the case of a
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* UP system running a SMP kernel. The existing apply_alternatives()
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* works fine for patching a SMP kernel for UP.
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*
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* The SMP alternative tables can be kept after boot and contain both
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* UP and SMP versions of the instructions to allow switching back to
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* SMP at runtime, when hotplugging in a new CPU, which is especially
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* useful in virtualized environments.
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*
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* The very common lock prefix is handled as special case in a
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* separate table which is a pure address list without replacement ptr
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* and size information. That keeps the table sizes small.
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*/
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#ifdef CONFIG_SMP
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#define LOCK_PREFIX \
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".section .smp_locks,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661f\n" /* address */ \
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".previous\n" \
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"661:\n\tlock; "
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#else /* ! CONFIG_SMP */
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#define LOCK_PREFIX ""
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#endif
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/* This must be included *after* the definition of LOCK_PREFIX */
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#include <asm/cpufeature.h>
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struct alt_instr {
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u8 *instr; /* original instruction */
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u8 *replacement;
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u8 cpuid; /* cpuid bit set for replacement */
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u8 instrlen; /* length of original instruction */
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u8 replacementlen; /* length of new instruction, <= instrlen */
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u8 pad1;
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#ifdef CONFIG_X86_64
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u32 pad2;
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#endif
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};
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extern void alternative_instructions(void);
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extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
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struct module;
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#ifdef CONFIG_SMP
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extern void alternatives_smp_module_add(struct module *mod, char *name,
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void *locks, void *locks_end,
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void *text, void *text_end);
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extern void alternatives_smp_module_del(struct module *mod);
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extern void alternatives_smp_switch(int smp);
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#else
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static inline void alternatives_smp_module_add(struct module *mod, char *name,
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void *locks, void *locks_end,
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void *text, void *text_end) {}
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static inline void alternatives_smp_module_del(struct module *mod) {}
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static inline void alternatives_smp_switch(int smp) {}
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#endif /* CONFIG_SMP */
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/*
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* Alternative instructions for different CPU types or capabilities.
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*
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* This allows to use optimized instructions even on generic binary
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* kernels.
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*
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* length of oldinstr must be longer or equal the length of newinstr
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* It can be padded with nops as needed.
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*
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* For non barrier like inlines please define new variants
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* without volatile and memory clobber.
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*/
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#define alternative(oldinstr, newinstr, feature) \
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
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".section .altinstructions,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661b\n" /* label */ \
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_ASM_PTR "663f\n" /* new instruction */ \
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" .byte %c0\n" /* feature bit */ \
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" .byte 662b-661b\n" /* sourcelen */ \
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" .byte 664f-663f\n" /* replacementlen */ \
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".previous\n" \
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".section .altinstr_replacement,\"ax\"\n" \
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"663:\n\t" newinstr "\n664:\n" /* replacement */ \
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".previous" :: "i" (feature) : "memory")
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/*
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* Alternative inline assembly with input.
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*
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* Pecularities:
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* No memory clobber here.
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* Argument numbers start with 1.
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* Best is to use constraints that are fixed size (like (%1) ... "r")
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* If you use variable sized constraints like "m" or "g" in the
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* replacement make sure to pad to the worst case length.
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*/
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#define alternative_input(oldinstr, newinstr, feature, input...) \
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
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".section .altinstructions,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661b\n" /* label */ \
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_ASM_PTR "663f\n" /* new instruction */ \
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" .byte %c0\n" /* feature bit */ \
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" .byte 662b-661b\n" /* sourcelen */ \
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" .byte 664f-663f\n" /* replacementlen */ \
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".previous\n" \
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".section .altinstr_replacement,\"ax\"\n" \
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"663:\n\t" newinstr "\n664:\n" /* replacement */ \
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".previous" :: "i" (feature), ##input)
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/* Like alternative_input, but with a single output argument */
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#define alternative_io(oldinstr, newinstr, feature, output, input...) \
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
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".section .altinstructions,\"a\"\n" \
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_ASM_ALIGN "\n" \
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_ASM_PTR "661b\n" /* label */ \
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_ASM_PTR "663f\n" /* new instruction */ \
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" .byte %c[feat]\n" /* feature bit */ \
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" .byte 662b-661b\n" /* sourcelen */ \
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" .byte 664f-663f\n" /* replacementlen */ \
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".previous\n" \
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".section .altinstr_replacement,\"ax\"\n" \
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"663:\n\t" newinstr "\n664:\n" /* replacement */ \
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".previous" : output : [feat] "i" (feature), ##input)
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/*
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* use this macro(s) if you need more than one output parameter
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* in alternative_io
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*/
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#define ASM_OUTPUT2(a, b) a, b
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struct paravirt_patch_site;
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#ifdef CONFIG_PARAVIRT
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void apply_paravirt(struct paravirt_patch_site *start,
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struct paravirt_patch_site *end);
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#else
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static inline void
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apply_paravirt(struct paravirt_patch_site *start,
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struct paravirt_patch_site *end)
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{}
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#define __parainstructions NULL
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#define __parainstructions_end NULL
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#endif
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extern void text_poke(void *addr, unsigned char *opcode, int len);
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#endif /* _I386_ALTERNATIVE_H */
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@ -1,161 +0,0 @@
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#ifndef _X86_64_ALTERNATIVE_H
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#define _X86_64_ALTERNATIVE_H
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#include <linux/types.h>
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#include <linux/stddef.h>
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#include <asm/asm.h>
|
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|
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/*
|
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* Alternative inline assembly for SMP.
|
||||
*
|
||||
* The LOCK_PREFIX macro defined here replaces the LOCK and
|
||||
* LOCK_PREFIX macros used everywhere in the source tree.
|
||||
*
|
||||
* SMP alternatives use the same data structures as the other
|
||||
* alternatives and the X86_FEATURE_UP flag to indicate the case of a
|
||||
* UP system running a SMP kernel. The existing apply_alternatives()
|
||||
* works fine for patching a SMP kernel for UP.
|
||||
*
|
||||
* The SMP alternative tables can be kept after boot and contain both
|
||||
* UP and SMP versions of the instructions to allow switching back to
|
||||
* SMP at runtime, when hotplugging in a new CPU, which is especially
|
||||
* useful in virtualized environments.
|
||||
*
|
||||
* The very common lock prefix is handled as special case in a
|
||||
* separate table which is a pure address list without replacement ptr
|
||||
* and size information. That keeps the table sizes small.
|
||||
*/
|
||||
|
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#ifdef CONFIG_SMP
|
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#define LOCK_PREFIX \
|
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".section .smp_locks,\"a\"\n" \
|
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_ASM_ALIGN "\n" \
|
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_ASM_PTR "661f\n" /* address */ \
|
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".previous\n" \
|
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"661:\n\tlock; "
|
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|
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#else /* ! CONFIG_SMP */
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#define LOCK_PREFIX ""
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#endif
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|
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/* This must be included *after* the definition of LOCK_PREFIX */
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#include <asm/cpufeature.h>
|
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|
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struct alt_instr {
|
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u8 *instr; /* original instruction */
|
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u8 *replacement;
|
||||
u8 cpuid; /* cpuid bit set for replacement */
|
||||
u8 instrlen; /* length of original instruction */
|
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u8 replacementlen; /* length of new instruction, <= instrlen */
|
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u8 pad1;
|
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#ifdef CONFIG_X86_64
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u32 pad2;
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#endif
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};
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|
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extern void alternative_instructions(void);
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extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
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|
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struct module;
|
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|
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#ifdef CONFIG_SMP
|
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extern void alternatives_smp_module_add(struct module *mod, char *name,
|
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void *locks, void *locks_end,
|
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void *text, void *text_end);
|
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extern void alternatives_smp_module_del(struct module *mod);
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extern void alternatives_smp_switch(int smp);
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#else
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static inline void alternatives_smp_module_add(struct module *mod, char *name,
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void *locks, void *locks_end,
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void *text, void *text_end) {}
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static inline void alternatives_smp_module_del(struct module *mod) {}
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static inline void alternatives_smp_switch(int smp) {}
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#endif /* CONFIG_SMP */
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|
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/*
|
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* Alternative instructions for different CPU types or capabilities.
|
||||
*
|
||||
* This allows to use optimized instructions even on generic binary
|
||||
* kernels.
|
||||
*
|
||||
* length of oldinstr must be longer or equal the length of newinstr
|
||||
* It can be padded with nops as needed.
|
||||
*
|
||||
* For non barrier like inlines please define new variants
|
||||
* without volatile and memory clobber.
|
||||
*/
|
||||
#define alternative(oldinstr, newinstr, feature) \
|
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asm volatile ("661:\n\t" oldinstr "\n662:\n" \
|
||||
".section .altinstructions,\"a\"\n" \
|
||||
_ASM_ALIGN "\n" \
|
||||
_ASM_PTR "661b\n" /* label */ \
|
||||
_ASM_PTR "663f\n" /* new instruction */ \
|
||||
" .byte %c0\n" /* feature bit */ \
|
||||
" .byte 662b-661b\n" /* sourcelen */ \
|
||||
" .byte 664f-663f\n" /* replacementlen */ \
|
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".previous\n" \
|
||||
".section .altinstr_replacement,\"ax\"\n" \
|
||||
"663:\n\t" newinstr "\n664:\n" /* replacement */ \
|
||||
".previous" :: "i" (feature) : "memory")
|
||||
|
||||
/*
|
||||
* Alternative inline assembly with input.
|
||||
*
|
||||
* Pecularities:
|
||||
* No memory clobber here.
|
||||
* Argument numbers start with 1.
|
||||
* Best is to use constraints that are fixed size (like (%1) ... "r")
|
||||
* If you use variable sized constraints like "m" or "g" in the
|
||||
* replacement make sure to pad to the worst case length.
|
||||
*/
|
||||
#define alternative_input(oldinstr, newinstr, feature, input...) \
|
||||
asm volatile ("661:\n\t" oldinstr "\n662:\n" \
|
||||
".section .altinstructions,\"a\"\n" \
|
||||
_ASM_ALIGN "\n" \
|
||||
_ASM_PTR "661b\n" /* label */ \
|
||||
_ASM_PTR "663f\n" /* new instruction */ \
|
||||
" .byte %c0\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" :: "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" \
|
||||
_ASM_ALIGN "\n" \
|
||||
_ASM_PTR "661b\n" /* label */ \
|
||||
_ASM_PTR "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)
|
||||
|
||||
/*
|
||||
* use this macro(s) if you need more than one output parameter
|
||||
* in alternative_io
|
||||
*/
|
||||
#define ASM_OUTPUT2(a, b) a, b
|
||||
|
||||
struct paravirt_patch_site;
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
void apply_paravirt(struct paravirt_patch_site *start,
|
||||
struct paravirt_patch_site *end);
|
||||
#else
|
||||
static inline void
|
||||
apply_paravirt(struct paravirt_patch_site *start,
|
||||
struct paravirt_patch_site *end)
|
||||
{}
|
||||
#define __parainstructions NULL
|
||||
#define __parainstructions_end NULL
|
||||
#endif
|
||||
|
||||
extern void text_poke(void *addr, unsigned char *opcode, int len);
|
||||
|
||||
#endif /* _X86_64_ALTERNATIVE_H */
|
||||
Loading…
Reference in New Issue