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authorMahesh Bodapati <bmahi496@linux.ibm.com>2023-08-01 07:41:17 -0500
committerRajalakshmi Srinivasaraghavan <rajis@linux.ibm.com>2023-08-01 07:41:17 -0500
commit21841f0d562f0e944c4d267a28cc3ebd19c847e9 (patch)
tree30b6e0831da1a801e96c91b5c2781312ce2c4624 /manual
parent5c37d2065286d3db7b974266a3002bb5747d2e5d (diff)
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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>
Diffstat (limited to 'manual')
-rw-r--r--manual/tunables.texi5
1 files changed, 4 insertions, 1 deletions
diff --git a/manual/tunables.texi b/manual/tunables.texi
index 4ca0e42..776fd93 100644
--- a/manual/tunables.texi
+++ b/manual/tunables.texi
@@ -513,7 +513,10 @@ On s390x, the supported HWCAP and STFLE features can be found in
@code{sysdeps/s390/cpu-features.c}. In addition the user can also set
a CPU arch-level like @code{z13} instead of single HWCAP and STFLE features.
-This tunable is specific to i386, x86-64 and s390x.
+On powerpc, the supported HWCAP and HWCAP2 features can be found in
+@code{sysdeps/powerpc/dl-procinfo.c}.
+
+This tunable is specific to i386, x86-64, s390x and powerpc.
@end deftp
@deftp Tunable glibc.cpu.cached_memopt