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x86: Fix value for x86_memset_non_temporal_threshold when it is undesirable

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When we don't want to use non-temporal stores for memset, we set
`x86_memset_non_temporal_threshold` to SIZE_MAX.

The current code, however, we using `maximum_non_temporal_threshold`
as the upper bound which is `SIZE_MAX >> 4` so we ended up with a
value of `0`.

Fix is to just use `SIZE_MAX` as the upper bound for when setting the
tunable.
Tested-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Noah Goldstein 2024-06-14 13:01:58 -05:00
parent 0b7f7842f8
commit 5b54a33435
1 changed files with 3 additions and 3 deletions
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6
sysdeps/x86/dl-cacheinfo.h
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@ -1044,9 +1044,9 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
TUNABLE_SET_WITH_BOUNDS (x86_non_temporal_threshold, non_temporal_threshold,
minimum_non_temporal_threshold,
maximum_non_temporal_threshold);
TUNABLE_SET_WITH_BOUNDS (
x86_memset_non_temporal_threshold, memset_non_temporal_threshold,
minimum_non_temporal_threshold, maximum_non_temporal_threshold);
TUNABLE_SET_WITH_BOUNDS (x86_memset_non_temporal_threshold,
memset_non_temporal_threshold,
minimum_non_temporal_threshold, SIZE_MAX);
TUNABLE_SET_WITH_BOUNDS (x86_rep_movsb_threshold, rep_movsb_threshold,
minimum_rep_movsb_threshold, SIZE_MAX);
TUNABLE_SET_WITH_BOUNDS (x86_rep_stosb_threshold, rep_stosb_threshold, 1,