From ff08fc59e36e02074eba8ab39b0d9001363970f0 Mon Sep 17 00:00:00 2001 From: Siddhesh Poyarekar Date: Thu, 1 Jun 2017 22:32:03 +0530 Subject: tunables: Use glibc.tune.hwcap_mask tunable instead of _dl_hwcap_mask Drop _dl_hwcap_mask when building with tunables. This completes the transition of hwcap_mask reading from _dl_hwcap_mask to tunables. * elf/dl-hwcaps.h: New file. * elf/dl-hwcaps.c: Include it. (_dl_important_hwcaps)[HAVE_TUNABLES]: Read and update glibc.tune.hwcap_mask. * elf/dl-cache.c: Include dl-hwcaps.h. (_dl_load_cache_lookup)[HAVE_TUNABLES]: Read glibc.tune.hwcap_mask. * sysdeps/sparc/sparc32/dl-machine.h: Likewise. * elf/dl-support.c (_dl_hwcap2)[HAVE_TUNABLES]: Drop _dl_hwcap_mask. * elf/rtld.c (rtld_global_ro)[HAVE_TUNABLES]: Drop _dl_hwcap_mask. (process_envvars)[HAVE_TUNABLES]: Likewise. * sysdeps/generic/ldsodefs.h (rtld_global_ro)[HAVE_TUNABLES]: Likewise. * sysdeps/x86/cpu-features.c (init_cpu_features): Don't initialize dl_hwcap_mask when tunables are enabled. --- sysdeps/x86/cpu-features.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'sysdeps/x86/cpu-features.c') diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index b481f50e75..4fe58bfd51 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -316,7 +316,11 @@ no_cpuid: /* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. */ GLRO(dl_platform) = NULL; GLRO(dl_hwcap) = 0; +#if !HAVE_TUNABLES + /* The glibc.tune.hwcap_mask tunable is initialized already, so no need to do + this. */ GLRO(dl_hwcap_mask) = HWCAP_IMPORTANT; +#endif # ifdef __x86_64__ if (cpu_features->kind == arch_kind_intel) -- cgit 1.4.1