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| author | Stefan Liebler <stli@linux.ibm.com> | 2024-06-07 13:42:43 +0200 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2024-06-18 10:45:36 +0200 |
| commit | ad0aa1f54975bd20e30559930ea48a3568441ff4 (patch) | |
| tree | a61b1c1b03cfc17b4ccd3f208bdaf341d1d012b3 /manual/tunables.texi | |
| parent | 343439a31ed1f07da307037b2c92b8ab3367c05c (diff) | |
| download | glibc-ad0aa1f54975bd20e30559930ea48a3568441ff4.zip glibc-ad0aa1f54975bd20e30559930ea48a3568441ff4.tar.gz glibc-ad0aa1f54975bd20e30559930ea48a3568441ff4.tar.bz2 | |
elf: Remove LD_HWCAP_MASK / tunable glibc.cpu.hwcap_mask
Remove the environment variable LD_HWCAP_MASK and the tunable
glibc.cpu.hwcap_mask as those are not used anymore in common-code
after removal in elf/dl-cache.c:search_cache().
The only remaining user is sparc32 where it is used in
elf_machine_matches_host(). If sparc32 does not need it anymore,
we can get rid of it at all. Otherwise we could also move
LD_HWCAP_MASK / tunable glibc.cpu.hwcap_mask to be sparc32 specific.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'manual/tunables.texi')
| -rw-r--r-- | manual/tunables.texi | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/manual/tunables.texi b/manual/tunables.texi index 8dd02d8..0b1b2898 100644 --- a/manual/tunables.texi +++ b/manual/tunables.texi @@ -55,7 +55,6 @@ glibc.cpu.x86_non_temporal_threshold: 0xc0000 (min: 0x4040, max: 0xfffffffffffff glibc.cpu.x86_memset_non_temporal_threshold: 0xc0000 (min: 0x4040, max: 0xfffffffffffffff) glibc.cpu.x86_shstk: glibc.pthread.stack_cache_size: 0x2800000 (min: 0x0, max: 0xffffffffffffffff) -glibc.cpu.hwcap_mask: 0x6 (min: 0x0, max: 0xffffffffffffffff) glibc.malloc.mmap_max: 0 (min: 0, max: 2147483647) glibc.elision.skip_trylock_internal_abort: 3 (min: 0, max: 2147483647) glibc.cpu.plt_rewrite: 0 (min: 0, max: 2) @@ -504,16 +503,6 @@ Behavior of @theglibc{} can be tuned to assume specific hardware capabilities by setting the following tunables in the @code{cpu} namespace: @end deftp -@deftp Tunable glibc.cpu.hwcap_mask -This tunable supersedes the @env{LD_HWCAP_MASK} environment variable and is -identical in features. - -The @code{AT_HWCAP} key in the Auxiliary Vector specifies instruction set -extensions available in the processor at runtime for some architectures. The -@code{glibc.cpu.hwcap_mask} tunable allows the user to mask out those -capabilities at runtime, thus disabling use of those extensions. -@end deftp - @deftp Tunable glibc.cpu.hwcaps The @code{glibc.cpu.hwcaps=-xxx,yyy,-zzz...} tunable allows the user to enable CPU/ARCH feature @code{yyy}, disable CPU/ARCH feature @code{xxx} |