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Remove --enable-tunables configure option

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And make always supported.  The configure option was added on glibc 2.25
and some features require it (such as hwcap mask, huge pages support, and
lock elisition tuning).  It also simplifies the build permutations.

Changes from v1:
 * Remove glibc.rtld.dynamic_sort changes, it is orthogonal and needs
   more discussion.
 * Cleanup more code.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
This commit is contained in:
Adhemerval Zanella Netto
2023-03-23 10:13:51 -03:00
committed by Adhemerval Zanella
parent 6384171fa0
commit 33237fe83d
48 changed files with 75 additions and 513 deletions
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24
sysdeps/x86/cpu-features.c
View File

@ -23,11 +23,10 @@
#include <dl-cacheinfo.h>
#include <dl-minsigstacksize.h>
#if HAVE_TUNABLES
extern void TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *)
attribute_hidden;
# ifdef __LP64__
#ifdef __LP64__
static void
TUNABLE_CALLBACK (set_prefer_map_32bit_exec) (tunable_val_t *valp)
{
@ -35,17 +34,14 @@ TUNABLE_CALLBACK (set_prefer_map_32bit_exec) (tunable_val_t *valp)
GLRO(dl_x86_cpu_features).preferred[index_arch_Prefer_MAP_32BIT_EXEC]
|= bit_arch_Prefer_MAP_32BIT_EXEC;
}
# endif
#endif
# if CET_ENABLED
#if CET_ENABLED
extern void TUNABLE_CALLBACK (set_x86_ibt) (tunable_val_t *)
attribute_hidden;
extern void TUNABLE_CALLBACK (set_x86_shstk) (tunable_val_t *)
attribute_hidden;
# endif
#endif
#if CET_ENABLED
# include <dl-cet.h>
#endif
@ -712,13 +708,12 @@ no_cpuid:
dl_init_cacheinfo (cpu_features);
#if HAVE_TUNABLES
TUNABLE_GET (hwcaps, tunable_val_t *, TUNABLE_CALLBACK (set_hwcaps));
# ifdef __LP64__
#ifdef __LP64__
TUNABLE_GET (prefer_map_32bit_exec, tunable_val_t *,
TUNABLE_CALLBACK (set_prefer_map_32bit_exec));
# endif
#endif
bool disable_xsave_features = false;
@ -774,13 +769,6 @@ no_cpuid:
CPU_FEATURE_UNSET (cpu_features, FMA4);
}
#elif defined SHARED
/* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. The
glibc.cpu.hwcap_mask tunable is initialized already, so no
need to do this. */
GLRO(dl_hwcap_mask) = HWCAP_IMPORTANT;
#endif
#ifdef __x86_64__
GLRO(dl_hwcap) = HWCAP_X86_64;
if (cpu_features->basic.kind == arch_kind_intel)
@ -828,12 +816,10 @@ no_cpuid:
#endif
#if CET_ENABLED
# if HAVE_TUNABLES
TUNABLE_GET (x86_ibt, tunable_val_t *,
TUNABLE_CALLBACK (set_x86_ibt));
TUNABLE_GET (x86_shstk, tunable_val_t *,
TUNABLE_CALLBACK (set_x86_shstk));
# endif
/* Check CET status. */
unsigned int cet_status = get_cet_status ();