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author	caiyinyu <caiyinyu@loongson.cn>
	Fri, 15 Sep 2023 09:35:19 +0000 (17:35 +0800)
committer	caiyinyu <caiyinyu@loongson.cn>
	Wed, 24 Apr 2024 10:22:38 +0000 (18:22 +0800)
commit	095067efdf68c8061d6f99a21a0300841bede999
tree	6632c0cb08991fbd2c08809f24320493687c81a6	tree \| snapshot
parent	f4724843ada64a51d66f65d3199fe431f9d4c254	commit \| diff

LoongArch: Add glibc.cpu.hwcap support.

The current IFUNC selection is always using the most recent
features which are available via AT_HWCAP. But in
some scenarios it is useful to adjust this selection.

The environment variable:

GLIBC_TUNABLES=glibc.cpu.hwcaps=-xxx,yyy,zzz,....

can be used to enable HWCAP feature yyy, disable HWCAP feature xxx,
where the feature name is case-sensitive and has to match the ones
used in sysdeps/loongarch/cpu-tunables.c.

Signed-off-by: caiyinyu <caiyinyu@loongson.cn>

13 files changed:

manual/tunables.texi		diff \| blob \| blame \| history
sysdeps/loongarch/Makefile		diff \| blob \| blame \| history
sysdeps/loongarch/cpu-tunables.c	[new file with mode: 0644]	blob
sysdeps/loongarch/dl-get-cpu-features.c	[new file with mode: 0644]	blob
sysdeps/loongarch/dl-machine.h		diff \| blob \| blame \| history
sysdeps/loongarch/dl-tunables.list	[new file with mode: 0644]	blob
sysdeps/loongarch/lp64/multiarch/dl-symbol-redir-ifunc.h		diff \| blob \| blame \| history
sysdeps/loongarch/tst-hwcap-tunables.c	[new file with mode: 0644]	blob
sysdeps/unix/sysv/linux/loongarch/cpu-features.c	[new file with mode: 0644]	blob
sysdeps/unix/sysv/linux/loongarch/cpu-features.h		diff \| blob \| blame \| history
sysdeps/unix/sysv/linux/loongarch/dl-procinfo.c	[new file with mode: 0644]	blob
sysdeps/unix/sysv/linux/loongarch/dl-sysdep.c	[new file with mode: 0644]	blob
sysdeps/unix/sysv/linux/loongarch/libc-start.c	[new file with mode: 0644]	blob

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