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perf bench: Update the copies of x86's mem{cpy,set}_64.S

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And update linux/linkage.h, which requires in turn that we make these
files switch from ENTRY()/ENDPROC() to SYM_FUNC_START()/SYM_FUNC_END():

  tools/perf/arch/arm64/tests/regs_load.S
  tools/perf/arch/arm/tests/regs_load.S
  tools/perf/arch/powerpc/tests/regs_load.S
  tools/perf/arch/x86/tests/regs_load.S

We also need to switch SYM_FUNC_START_LOCAL() to SYM_FUNC_START() for
the functions used directly by 'perf bench', and update
tools/perf/check_headers.sh to ignore those changes when checking if the
kernel original files drifted from the copies we carry.

This is to get the changes from:

  6dcc5627f6 ("x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_*")
  ef1e03152c ("x86/asm: Make some functions local")
  e9b9d020c4 ("x86/asm: Annotate aliases")

And address these tools/perf build warnings:

  Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
  diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
  Warning: Kernel ABI header at 'tools/arch/x86/lib/memset_64.S' differs from latest version at 'arch/x86/lib/memset_64.S'
  diff -u tools/arch/x86/lib/memset_64.S arch/x86/lib/memset_64.S

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-tay3l8x8k11p7y3qcpqh9qh5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2019-12-02 11:40:57 -03:00
parent 77b91c1a52
commit bd5c6b81dd
7 changed files with 115 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
tools/arch/x86/lib/memcpy_64.S
View File

@@ -28,8 +28,8 @@
* Output:
* rax original destination
*/
ENTRY(__memcpy)
ENTRY(memcpy)
SYM_FUNC_START_ALIAS(__memcpy)
SYM_FUNC_START_LOCAL(memcpy)
ALTERNATIVE_2 "jmp memcpy_orig", "", X86_FEATURE_REP_GOOD, \
"jmp memcpy_erms", X86_FEATURE_ERMS
@@ -41,8 +41,8 @@ ENTRY(memcpy)
movl %edx, %ecx
rep movsb
ret
ENDPROC(memcpy)
ENDPROC(__memcpy)
SYM_FUNC_END(memcpy)
SYM_FUNC_END_ALIAS(__memcpy)
EXPORT_SYMBOL(memcpy)
EXPORT_SYMBOL(__memcpy)
@@ -50,14 +50,14 @@ EXPORT_SYMBOL(__memcpy)
* memcpy_erms() - enhanced fast string memcpy. This is faster and
* simpler than memcpy. Use memcpy_erms when possible.
*/
ENTRY(memcpy_erms)
SYM_FUNC_START(memcpy_erms)
movq %rdi, %rax
movq %rdx, %rcx
rep movsb
ret
ENDPROC(memcpy_erms)
SYM_FUNC_END(memcpy_erms)
ENTRY(memcpy_orig)
SYM_FUNC_START(memcpy_orig)
movq %rdi, %rax
cmpq $0x20, %rdx
@@ -182,7 +182,7 @@ ENTRY(memcpy_orig)
.Lend:
retq
ENDPROC(memcpy_orig)
SYM_FUNC_END(memcpy_orig)
#ifndef CONFIG_UML
@@ -193,7 +193,7 @@ MCSAFE_TEST_CTL
* Note that we only catch machine checks when reading the source addresses.
* Writes to target are posted and don't generate machine checks.
*/
ENTRY(__memcpy_mcsafe)
SYM_FUNC_START(__memcpy_mcsafe)
cmpl $8, %edx
/* Less than 8 bytes? Go to byte copy loop */
jb .L_no_whole_words
@@ -260,7 +260,7 @@ ENTRY(__memcpy_mcsafe)
xorl %eax, %eax
.L_done:
ret
ENDPROC(__memcpy_mcsafe)
SYM_FUNC_END(__memcpy_mcsafe)
EXPORT_SYMBOL_GPL(__memcpy_mcsafe)
.section .fixup, "ax"

16
tools/arch/x86/lib/memset_64.S
View File

@@ -18,8 +18,8 @@
*
* rax original destination
*/
ENTRY(memset)
ENTRY(__memset)
SYM_FUNC_START_ALIAS(memset)
SYM_FUNC_START(__memset)
/*
* Some CPUs support enhanced REP MOVSB/STOSB feature. It is recommended
* to use it when possible. If not available, use fast string instructions.
@@ -42,8 +42,8 @@ ENTRY(__memset)
rep stosb
movq %r9,%rax
ret
ENDPROC(memset)
ENDPROC(__memset)
SYM_FUNC_END(__memset)
SYM_FUNC_END_ALIAS(memset)
/*
* ISO C memset - set a memory block to a byte value. This function uses
@@ -56,16 +56,16 @@ ENDPROC(__memset)
*
* rax original destination
*/
ENTRY(memset_erms)
SYM_FUNC_START(memset_erms)
movq %rdi,%r9
movb %sil,%al
movq %rdx,%rcx
rep stosb
movq %r9,%rax
ret
ENDPROC(memset_erms)
SYM_FUNC_END(memset_erms)
ENTRY(memset_orig)
SYM_FUNC_START(memset_orig)
movq %rdi,%r10
/* expand byte value */
@@ -136,4 +136,4 @@ ENTRY(memset_orig)
subq %r8,%rdx
jmp .Lafter_bad_alignment
.Lfinal:
ENDPROC(memset_orig)
SYM_FUNC_END(memset_orig)