PowerPC: Influence cpu/arch hwcap features via GLIBC_TUNABLES

This patch enables the option to influence hwcaps used by PowerPC.
The environment variable, GLIBC_TUNABLES=glibc.cpu.hwcaps=-xxx,yyy,-zzz....,
can be used to enable CPU/ARCH feature yyy, disable CPU/ARCH feature xxx
and zzz, where the feature name is case-sensitive and has to match the ones
mentioned in the file{sysdeps/powerpc/dl-procinfo.c}.

Note that the hwcap tunables only used in the IFUNC selection.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 0 insertions, 32 deletions

diff --git a/sysdeps/powerpc/cpu-features.c b/sysdeps/powerpc/cpu-features.c
deleted file mode 100644
index 0ef3cf89d2..0000000000
--- a/sysdeps/powerpc/cpu-features.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Initialize cpu feature data.  PowerPC version.
-   Copyright (C) 2017-2023 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <stdint.h>
-#include <cpu-features.h>
-#include <elf/dl-tunables.h>
-
-static inline void
-init_cpu_features (struct cpu_features *cpu_features)
-{
-  /* Default is to use aligned memory access on optimized function unless
-     tunables is enable, since for this case user can explicit disable
-     unaligned optimizations.  */
-  int32_t cached_memfunc = TUNABLE_GET (glibc, cpu, cached_memopt, int32_t,
-					NULL);
-  cpu_features->use_cached_memopt = (cached_memfunc > 0);
-}