mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
x86/alternative: Merge include files
Merge arch/x86/include/asm/alternative-asm.h into arch/x86/include/asm/alternative.h in order to make it easier to use common definitions later. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210311142319.4723-2-jgross@suse.com
This commit is contained in:
Juergen Gross
Borislav Petkov
parent
db16e07269
commit
5e21a3ecad
14 changed files with 120 additions and 132 deletions
|
|
@ -40,7 +40,7 @@
|
|||
#include <asm/processor-flags.h>
|
||||
#include <asm/irq_vectors.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/asm.h>
|
||||
#include <asm/smap.h>
|
||||
#include <asm/frame.h>
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@
|
|||
#include <linux/linkage.h>
|
||||
#include <asm/dwarf2.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
|
||||
.text
|
||||
.globl __kernel_vsyscall
|
||||
|
|
|
|||
|
|
@ -1,114 +0,0 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef _ASM_X86_ALTERNATIVE_ASM_H
|
||||
#define _ASM_X86_ALTERNATIVE_ASM_H
|
||||
|
||||
#ifdef __ASSEMBLY__
|
||||
|
||||
#include <asm/asm.h>
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
.macro LOCK_PREFIX
|
||||
672: lock
|
||||
.pushsection .smp_locks,"a"
|
||||
.balign 4
|
||||
.long 672b - .
|
||||
.popsection
|
||||
.endm
|
||||
#else
|
||||
.macro LOCK_PREFIX
|
||||
.endm
|
||||
#endif
|
||||
|
||||
/*
|
||||
* objtool annotation to ignore the alternatives and only consider the original
|
||||
* instruction(s).
|
||||
*/
|
||||
.macro ANNOTATE_IGNORE_ALTERNATIVE
|
||||
.Lannotate_\@:
|
||||
.pushsection .discard.ignore_alts
|
||||
.long .Lannotate_\@ - .
|
||||
.popsection
|
||||
.endm
|
||||
|
||||
/*
|
||||
* Issue one struct alt_instr descriptor entry (need to put it into
|
||||
* the section .altinstructions, see below). This entry contains
|
||||
* enough information for the alternatives patching code to patch an
|
||||
* instruction. See apply_alternatives().
|
||||
*/
|
||||
.macro altinstruction_entry orig alt feature orig_len alt_len pad_len
|
||||
.long \orig - .
|
||||
.long \alt - .
|
||||
.word \feature
|
||||
.byte \orig_len
|
||||
.byte \alt_len
|
||||
.byte \pad_len
|
||||
.endm
|
||||
|
||||
/*
|
||||
* Define an alternative between two instructions. If @feature is
|
||||
* present, early code in apply_alternatives() replaces @oldinstr with
|
||||
* @newinstr. ".skip" directive takes care of proper instruction padding
|
||||
* in case @newinstr is longer than @oldinstr.
|
||||
*/
|
||||
.macro ALTERNATIVE oldinstr, newinstr, feature
|
||||
140:
|
||||
\oldinstr
|
||||
141:
|
||||
.skip -(((144f-143f)-(141b-140b)) > 0) * ((144f-143f)-(141b-140b)),0x90
|
||||
142:
|
||||
|
||||
.pushsection .altinstructions,"a"
|
||||
altinstruction_entry 140b,143f,\feature,142b-140b,144f-143f,142b-141b
|
||||
.popsection
|
||||
|
||||
.pushsection .altinstr_replacement,"ax"
|
||||
143:
|
||||
\newinstr
|
||||
144:
|
||||
.popsection
|
||||
.endm
|
||||
|
||||
#define old_len 141b-140b
|
||||
#define new_len1 144f-143f
|
||||
#define new_len2 145f-144f
|
||||
|
||||
/*
|
||||
* gas compatible max based on the idea from:
|
||||
* http://graphics.stanford.edu/~seander/bithacks.html#IntegerMinOrMax
|
||||
*
|
||||
* The additional "-" is needed because gas uses a "true" value of -1.
|
||||
*/
|
||||
#define alt_max_short(a, b) ((a) ^ (((a) ^ (b)) & -(-((a) < (b)))))
|
||||
|
||||
|
||||
/*
|
||||
* Same as ALTERNATIVE macro above but for two alternatives. If CPU
|
||||
* has @feature1, it replaces @oldinstr with @newinstr1. If CPU has
|
||||
* @feature2, it replaces @oldinstr with @feature2.
|
||||
*/
|
||||
.macro ALTERNATIVE_2 oldinstr, newinstr1, feature1, newinstr2, feature2
|
||||
140:
|
||||
\oldinstr
|
||||
141:
|
||||
.skip -((alt_max_short(new_len1, new_len2) - (old_len)) > 0) * \
|
||||
(alt_max_short(new_len1, new_len2) - (old_len)),0x90
|
||||
142:
|
||||
|
||||
.pushsection .altinstructions,"a"
|
||||
altinstruction_entry 140b,143f,\feature1,142b-140b,144f-143f,142b-141b
|
||||
altinstruction_entry 140b,144f,\feature2,142b-140b,145f-144f,142b-141b
|
||||
.popsection
|
||||
|
||||
.pushsection .altinstr_replacement,"ax"
|
||||
143:
|
||||
\newinstr1
|
||||
144:
|
||||
\newinstr2
|
||||
145:
|
||||
.popsection
|
||||
.endm
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
#endif /* _ASM_X86_ALTERNATIVE_ASM_H */
|
||||
|
|
@ -2,13 +2,14 @@
|
|||
#ifndef _ASM_X86_ALTERNATIVE_H
|
||||
#define _ASM_X86_ALTERNATIVE_H
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/stddef.h>
|
||||
#include <linux/stringify.h>
|
||||
#include <asm/asm.h>
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
#include <linux/stddef.h>
|
||||
|
||||
/*
|
||||
* Alternative inline assembly for SMP.
|
||||
*
|
||||
|
|
@ -271,6 +272,111 @@ static inline int alternatives_text_reserved(void *start, void *end)
|
|||
*/
|
||||
#define ASM_NO_INPUT_CLOBBER(clbr...) "i" (0) : clbr
|
||||
|
||||
#else /* __ASSEMBLY__ */
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
.macro LOCK_PREFIX
|
||||
672: lock
|
||||
.pushsection .smp_locks,"a"
|
||||
.balign 4
|
||||
.long 672b - .
|
||||
.popsection
|
||||
.endm
|
||||
#else
|
||||
.macro LOCK_PREFIX
|
||||
.endm
|
||||
#endif
|
||||
|
||||
/*
|
||||
* objtool annotation to ignore the alternatives and only consider the original
|
||||
* instruction(s).
|
||||
*/
|
||||
.macro ANNOTATE_IGNORE_ALTERNATIVE
|
||||
.Lannotate_\@:
|
||||
.pushsection .discard.ignore_alts
|
||||
.long .Lannotate_\@ - .
|
||||
.popsection
|
||||
.endm
|
||||
|
||||
/*
|
||||
* Issue one struct alt_instr descriptor entry (need to put it into
|
||||
* the section .altinstructions, see below). This entry contains
|
||||
* enough information for the alternatives patching code to patch an
|
||||
* instruction. See apply_alternatives().
|
||||
*/
|
||||
.macro altinstruction_entry orig alt feature orig_len alt_len pad_len
|
||||
.long \orig - .
|
||||
.long \alt - .
|
||||
.word \feature
|
||||
.byte \orig_len
|
||||
.byte \alt_len
|
||||
.byte \pad_len
|
||||
.endm
|
||||
|
||||
/*
|
||||
* Define an alternative between two instructions. If @feature is
|
||||
* present, early code in apply_alternatives() replaces @oldinstr with
|
||||
* @newinstr. ".skip" directive takes care of proper instruction padding
|
||||
* in case @newinstr is longer than @oldinstr.
|
||||
*/
|
||||
.macro ALTERNATIVE oldinstr, newinstr, feature
|
||||
140:
|
||||
\oldinstr
|
||||
141:
|
||||
.skip -(((144f-143f)-(141b-140b)) > 0) * ((144f-143f)-(141b-140b)),0x90
|
||||
142:
|
||||
|
||||
.pushsection .altinstructions,"a"
|
||||
altinstruction_entry 140b,143f,\feature,142b-140b,144f-143f,142b-141b
|
||||
.popsection
|
||||
|
||||
.pushsection .altinstr_replacement,"ax"
|
||||
143:
|
||||
\newinstr
|
||||
144:
|
||||
.popsection
|
||||
.endm
|
||||
|
||||
#define old_len 141b-140b
|
||||
#define new_len1 144f-143f
|
||||
#define new_len2 145f-144f
|
||||
|
||||
/*
|
||||
* gas compatible max based on the idea from:
|
||||
* http://graphics.stanford.edu/~seander/bithacks.html#IntegerMinOrMax
|
||||
*
|
||||
* The additional "-" is needed because gas uses a "true" value of -1.
|
||||
*/
|
||||
#define alt_max_short(a, b) ((a) ^ (((a) ^ (b)) & -(-((a) < (b)))))
|
||||
|
||||
|
||||
/*
|
||||
* Same as ALTERNATIVE macro above but for two alternatives. If CPU
|
||||
* has @feature1, it replaces @oldinstr with @newinstr1. If CPU has
|
||||
* @feature2, it replaces @oldinstr with @feature2.
|
||||
*/
|
||||
.macro ALTERNATIVE_2 oldinstr, newinstr1, feature1, newinstr2, feature2
|
||||
140:
|
||||
\oldinstr
|
||||
141:
|
||||
.skip -((alt_max_short(new_len1, new_len2) - (old_len)) > 0) * \
|
||||
(alt_max_short(new_len1, new_len2) - (old_len)),0x90
|
||||
142:
|
||||
|
||||
.pushsection .altinstructions,"a"
|
||||
altinstruction_entry 140b,143f,\feature1,142b-140b,144f-143f,142b-141b
|
||||
altinstruction_entry 140b,144f,\feature2,142b-140b,145f-144f,142b-141b
|
||||
.popsection
|
||||
|
||||
.pushsection .altinstr_replacement,"ax"
|
||||
143:
|
||||
\newinstr1
|
||||
144:
|
||||
\newinstr2
|
||||
145:
|
||||
.popsection
|
||||
.endm
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
#endif /* _ASM_X86_ALTERNATIVE_H */
|
||||
|
|
|
|||
|
|
@ -7,7 +7,6 @@
|
|||
#include <linux/objtool.h>
|
||||
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/msr-index.h>
|
||||
#include <asm/unwind_hints.h>
|
||||
|
|
|
|||
|
|
@ -11,6 +11,7 @@
|
|||
|
||||
#include <asm/nops.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative.h>
|
||||
|
||||
/* "Raw" instruction opcodes */
|
||||
#define __ASM_CLAC ".byte 0x0f,0x01,0xca"
|
||||
|
|
@ -18,8 +19,6 @@
|
|||
|
||||
#ifdef __ASSEMBLY__
|
||||
|
||||
#include <asm/alternative-asm.h>
|
||||
|
||||
#ifdef CONFIG_X86_SMAP
|
||||
|
||||
#define ASM_CLAC \
|
||||
|
|
@ -37,8 +36,6 @@
|
|||
|
||||
#else /* __ASSEMBLY__ */
|
||||
|
||||
#include <asm/alternative.h>
|
||||
|
||||
#ifdef CONFIG_X86_SMAP
|
||||
|
||||
static __always_inline void clac(void)
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@
|
|||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
|
||||
/* if you want SMP support, implement these with real spinlocks */
|
||||
.macro LOCK reg
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@
|
|||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
|
||||
.macro read64 reg
|
||||
movl %ebx, %eax
|
||||
|
|
|
|||
|
|
@ -3,7 +3,7 @@
|
|||
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/export.h>
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -11,7 +11,7 @@
|
|||
#include <asm/asm-offsets.h>
|
||||
#include <asm/thread_info.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/asm.h>
|
||||
#include <asm/smap.h>
|
||||
#include <asm/export.h>
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
#include <linux/linkage.h>
|
||||
#include <asm/errno.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/export.h>
|
||||
|
||||
.pushsection .noinstr.text, "ax"
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
*/
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/export.h>
|
||||
|
||||
#undef memmove
|
||||
|
|
|
|||
|
|
@ -3,7 +3,7 @@
|
|||
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/export.h>
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
#include <linux/linkage.h>
|
||||
#include <asm/dwarf2.h>
|
||||
#include <asm/cpufeatures.h>
|
||||
#include <asm/alternative-asm.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/export.h>
|
||||
#include <asm/nospec-branch.h>
|
||||
#include <asm/unwind_hints.h>
|
||||
|
|
|
|||
Loading…
Reference in a new issue