commit dce452dc5278f2985d21315721a6ba802537b862

Author: Siddhesh Poyarekar <siddhesh@sourceware.org>

Date:   Thu Aug 2 23:49:19 2018 +0530

    Rename the glibc.tune namespace to glibc.cpu

    The glibc.tune namespace is vaguely named since it is a 'tunable', so

    give it a more specific name that describes what it refers to.  Rename

    the tunable namespace to 'cpu' to more accurately reflect what it

    encompasses.  Also rename glibc.tune.cpu to glibc.cpu.name since

    glibc.cpu.cpu is weird.

            * NEWS: Mention the change.

            * elf/dl-tunables.list: Rename tune namespace to cpu.

            * sysdeps/powerpc/dl-tunables.list: Likewise.

            * sysdeps/x86/dl-tunables.list: Likewise.

            * sysdeps/aarch64/dl-tunables.list: Rename tune.cpu to

            cpu.name.

            * elf/dl-hwcaps.c (_dl_important_hwcaps): Adjust.

            * elf/dl-hwcaps.h (GET_HWCAP_MASK): Likewise.

            * manual/README.tunables: Likewise.

            * manual/tunables.texi: Likewise.

            * sysdeps/powerpc/cpu-features.c: Likewise.

            * sysdeps/unix/sysv/linux/aarch64/cpu-features.c

            (init_cpu_features): Likewise.

            * sysdeps/x86/cpu-features.c: Likewise.

            * sysdeps/x86/cpu-features.h: Likewise.

            * sysdeps/x86/cpu-tunables.c: Likewise.

            * sysdeps/x86_64/Makefile: Likewise.

            * sysdeps/x86/dl-cet.c: Likewise.

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Conflicts:

	manual/tunables.texi

	  (Earlier backport of non-temporal memcpy threshold.)

	sysdeps/x86/Makefile

	  (Earlier CET backports.)

diff --git a/elf/dl-hwcaps.c b/elf/dl-hwcaps.c

index 23482a88a1c9bca9..ecf00b457760e517 100644

--- a/elf/dl-hwcaps.c

+++ b/elf/dl-hwcaps.c

@@ -140,7 +140,7 @@ _dl_important_hwcaps (const char *platform, size_t platform_len, size_t *sz,

 	 string and bit like you can ignore an OS-supplied HWCAP bit.  */

       hwcap_mask |= (uint64_t) mask << _DL_FIRST_EXTRA;

 #if HAVE_TUNABLES

-      TUNABLE_SET (glibc, tune, hwcap_mask, uint64_t, hwcap_mask);

+      TUNABLE_SET (glibc, cpu, hwcap_mask, uint64_t, hwcap_mask);

 #else

       GLRO(dl_hwcap_mask) = hwcap_mask;

 #endif

diff --git a/elf/dl-hwcaps.h b/elf/dl-hwcaps.h

index 17f0da4c73772425..d69ee11dc27bb5e5 100644

--- a/elf/dl-hwcaps.h

+++ b/elf/dl-hwcaps.h

@@ -19,7 +19,7 @@

 #include <elf/dl-tunables.h>

 #if HAVE_TUNABLES

-# define GET_HWCAP_MASK() TUNABLE_GET (glibc, tune, hwcap_mask, uint64_t, NULL)

+# define GET_HWCAP_MASK() TUNABLE_GET (glibc, cpu, hwcap_mask, uint64_t, NULL)

 #else

 # ifdef SHARED

 #   define GET_HWCAP_MASK() GLRO(dl_hwcap_mask)

diff --git a/elf/dl-tunables.list b/elf/dl-tunables.list

index 1ff6fcb6f24f93a8..b7cc79f8bfe0a7c6 100644

--- a/elf/dl-tunables.list

+++ b/elf/dl-tunables.list

@@ -91,7 +91,7 @@ glibc {

       security_level: SXID_IGNORE

     }

   }

-  tune {

+  cpu {

     hwcap_mask {

       type: UINT_64

       env_alias: LD_HWCAP_MASK

diff --git a/manual/README.tunables b/manual/README.tunables

index 3967679f432a6378..f87a31a65e0a3455 100644

--- a/manual/README.tunables

+++ b/manual/README.tunables

@@ -105,11 +105,11 @@ where 'check' is the tunable name, 'int32_t' is the C type of the tunable and

 To get and set tunables in a different namespace from that module, use the full

 form of the macros as follows:

-  val = TUNABLE_GET_FULL (glibc, tune, hwcap_mask, uint64_t, NULL)

+  val = TUNABLE_GET_FULL (glibc, cpu, hwcap_mask, uint64_t, NULL)

-  TUNABLE_SET_FULL (glibc, tune, hwcap_mask, uint64_t, val)

+  TUNABLE_SET_FULL (glibc, cpu, hwcap_mask, uint64_t, val)

-where 'glibc' is the top namespace, 'tune' is the tunable namespace and the

+where 'glibc' is the top namespace, 'cpu' is the tunable namespace and the

 remaining arguments are the same as the short form macros.

 When TUNABLE_NAMESPACE is not defined in a module, TUNABLE_GET is equivalent to

diff --git a/manual/tunables.texi b/manual/tunables.texi

index 3e1e519dff153b09..ef10d2872cfc244e 100644

--- a/manual/tunables.texi

+++ b/manual/tunables.texi

@@ -307,23 +307,23 @@ The default value of this tunable is @samp{3}.

 @cindex non_temporal_threshold tunables

 @cindex tunables, non_temporal_threshold

-@deftp {Tunable namespace} glibc.tune

+@deftp {Tunable namespace} glibc.cpu

 Behavior of @theglibc{} can be tuned to assume specific hardware capabilities

-by setting the following tunables in the @code{tune} namespace:

+by setting the following tunables in the @code{cpu} namespace:

 @end deftp

-@deftp Tunable glibc.tune.hwcap_mask

+@deftp Tunable glibc.cpu.hwcap_mask

 This tunable supersedes the @env{LD_HWCAP_MASK} environment variable and is

 identical in features.

 The @code{AT_HWCAP} key in the Auxiliary Vector specifies instruction set

 extensions available in the processor at runtime for some architectures.  The

-@code{glibc.tune.hwcap_mask} tunable allows the user to mask out those

+@code{glibc.cpu.hwcap_mask} tunable allows the user to mask out those

 capabilities at runtime, thus disabling use of those extensions.

 @end deftp

-@deftp Tunable glibc.tune.hwcaps

-The @code{glibc.tune.hwcaps=-xxx,yyy,-zzz...} tunable allows the user to

+@deftp Tunable glibc.cpu.hwcaps

+The @code{glibc.cpu.hwcaps=-xxx,yyy,-zzz...} tunable allows the user to

 enable CPU/ARCH feature @code{yyy}, disable CPU/ARCH feature @code{xxx}

 and @code{zzz} where the feature name is case-sensitive and has to match

 the ones in @code{sysdeps/x86/cpu-features.h}.

@@ -331,8 +331,8 @@ the ones in @code{sysdeps/x86/cpu-features.h}.

 This tunable is specific to i386 and x86-64.

 @end deftp

-@deftp Tunable glibc.tune.cached_memopt

-The @code{glibc.tune.cached_memopt=[0|1]} tunable allows the user to

+@deftp Tunable glibc.cpu.cached_memopt

+The @code{glibc.cpu.cached_memopt=[0|1]} tunable allows the user to

 enable optimizations recommended for cacheable memory.  If set to

 @code{1}, @theglibc{} assumes that the process memory image consists

 of cacheable (non-device) memory only.  The default, @code{0},

@@ -341,8 +341,8 @@ indicates that the process may use device memory.

 This tunable is specific to powerpc, powerpc64 and powerpc64le.

 @end deftp

-@deftp Tunable glibc.tune.cpu

-The @code{glibc.tune.cpu=xxx} tunable allows the user to tell @theglibc{} to

+@deftp Tunable glibc.cpu.name

+The @code{glibc.cpu.name=xxx} tunable allows the user to tell @theglibc{} to

 assume that the CPU is @code{xxx} where xxx may have one of these values:

 @code{generic}, @code{falkor}, @code{thunderxt88}, @code{thunderx2t99},

 @code{thunderx2t99p1}.

@@ -350,20 +350,20 @@ assume that the CPU is @code{xxx} where xxx may have one of these values:

 This tunable is specific to aarch64.

 @end deftp

-@deftp Tunable glibc.tune.x86_data_cache_size

-The @code{glibc.tune.x86_data_cache_size} tunable allows the user to set

+@deftp Tunable glibc.cpu.x86_data_cache_size

+The @code{glibc.cpu.x86_data_cache_size} tunable allows the user to set

 data cache size in bytes for use in memory and string routines.

 This tunable is specific to i386 and x86-64.

 @end deftp

-@deftp Tunable glibc.tune.x86_shared_cache_size

-The @code{glibc.tune.x86_shared_cache_size} tunable allows the user to

+@deftp Tunable glibc.cpu.x86_shared_cache_size

+The @code{glibc.cpu.x86_shared_cache_size} tunable allows the user to

 set shared cache size in bytes for use in memory and string routines.

 @end deftp

-@deftp Tunable glibc.tune.x86_non_temporal_threshold

-The @code{glibc.tune.x86_non_temporal_threshold} tunable allows the user

+@deftp Tunable glibc.cpu.x86_non_temporal_threshold

+The @code{glibc.cpu.x86_non_temporal_threshold} tunable allows the user

 to set threshold in bytes for non temporal store. Non temporal stores

 give a hint to the hardware to move data directly to memory without

 displacing other data from the cache. This tunable is used by some

@@ -373,8 +373,8 @@ like memmove and memcpy.

 This tunable is specific to i386 and x86-64.

 @end deftp

-@deftp Tunable glibc.tune.x86_ibt

-The @code{glibc.tune.x86_ibt} tunable allows the user to control how

+@deftp Tunable glibc.cpu.x86_ibt

+The @code{glibc.cpu.x86_ibt} tunable allows the user to control how

 indirect branch tracking (IBT) should be enabled.  Accepted values are

 @code{on}, @code{off}, and @code{permissive}.  @code{on} always turns

 on IBT regardless of whether IBT is enabled in the executable and its

@@ -386,8 +386,8 @@ IBT on non-CET executables and shared libraries.

 This tunable is specific to i386 and x86-64.

 @end deftp

-@deftp Tunable glibc.tune.x86_shstk

-The @code{glibc.tune.x86_shstk} tunable allows the user to control how

+@deftp Tunable glibc.cpu.x86_shstk

+The @code{glibc.cpu.x86_shstk} tunable allows the user to control how

 the shadow stack (SHSTK) should be enabled.  Accepted values are

 @code{on}, @code{off}, and @code{permissive}.  @code{on} always turns on

 SHSTK regardless of whether SHSTK is enabled in the executable and its

diff --git a/sysdeps/aarch64/dl-tunables.list b/sysdeps/aarch64/dl-tunables.list

index f6a88168cc5ec7e6..cfcf940ebd15a9aa 100644

--- a/sysdeps/aarch64/dl-tunables.list

+++ b/sysdeps/aarch64/dl-tunables.list

@@ -17,8 +17,8 @@

 # <http://www.gnu.org/licenses/>.

 glibc {

-  tune {

-    cpu {

+  cpu {

+    name {

       type: STRING

     }

   }

diff --git a/sysdeps/powerpc/cpu-features.c b/sysdeps/powerpc/cpu-features.c

index 955d4778a69db607..ad809b9815eb68f0 100644

--- a/sysdeps/powerpc/cpu-features.c

+++ b/sysdeps/powerpc/cpu-features.c

@@ -30,7 +30,7 @@ init_cpu_features (struct cpu_features *cpu_features)

      tunables is enable, since for this case user can explicit disable

      unaligned optimizations.  */

 #if HAVE_TUNABLES

-  int32_t cached_memfunc = TUNABLE_GET (glibc, tune, cached_memopt, int32_t,

+  int32_t cached_memfunc = TUNABLE_GET (glibc, cpu, cached_memopt, int32_t,

 					NULL);

   cpu_features->use_cached_memopt = (cached_memfunc > 0);

 #else

diff --git a/sysdeps/powerpc/dl-tunables.list b/sysdeps/powerpc/dl-tunables.list

index d26636a16bfcd6d9..b3372555f75f8e38 100644

--- a/sysdeps/powerpc/dl-tunables.list

+++ b/sysdeps/powerpc/dl-tunables.list

@@ -17,7 +17,7 @@

 # <http://www.gnu.org/licenses/>.

 glibc {

-  tune {

+  cpu {

     cached_memopt {

       type: INT_32

       minval: 0

diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c

index 39eba0186f55b5de..b4f348509eb1c6b3 100644

--- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c

+++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c

@@ -57,7 +57,7 @@ init_cpu_features (struct cpu_features *cpu_features)

 #if HAVE_TUNABLES

   /* Get the tunable override.  */

-  const char *mcpu = TUNABLE_GET (glibc, tune, cpu, const char *, NULL);

+  const char *mcpu = TUNABLE_GET (glibc, cpu, name, const char *, NULL);

   if (mcpu != NULL)

     midr = get_midr_from_mcpu (mcpu);

 #endif

diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile

index d5f821e0831997ac..a936134a577e42a5 100644

--- a/sysdeps/x86/Makefile

+++ b/sysdeps/x86/Makefile

@@ -84,21 +84,21 @@ LDFLAGS-tst-cet-legacy-mod-6c.so = -Wl,--enable-new-dtags,-z,nodelete

 ifneq (no,$(have-tunables))

 $(objpfx)tst-cet-legacy-4a: $(libdl)

 $(objpfx)tst-cet-legacy-4a.out: $(objpfx)tst-cet-legacy-mod-4.so

-tst-cet-legacy-4a-ENV = GLIBC_TUNABLES=glibc.tune.x86_shstk=permissive

+tst-cet-legacy-4a-ENV = GLIBC_TUNABLES=glibc.cpu.x86_shstk=permissive

 $(objpfx)tst-cet-legacy-4b: $(libdl)

 $(objpfx)tst-cet-legacy-4b.out: $(objpfx)tst-cet-legacy-mod-4.so

-tst-cet-legacy-4b-ENV = GLIBC_TUNABLES=glibc.tune.x86_shstk=on

+tst-cet-legacy-4b-ENV = GLIBC_TUNABLES=glibc.cpu.x86_shstk=on

 $(objpfx)tst-cet-legacy-4c: $(libdl)

 $(objpfx)tst-cet-legacy-4c.out: $(objpfx)tst-cet-legacy-mod-4.so

-tst-cet-legacy-4c-ENV = GLIBC_TUNABLES=glibc.tune.x86_shstk=off

+tst-cet-legacy-4c-ENV = GLIBC_TUNABLES=glibc.cpu.x86_shstk=off

 $(objpfx)tst-cet-legacy-5b: $(libdl)

 $(objpfx)tst-cet-legacy-5b.out: $(objpfx)tst-cet-legacy-mod-5a.so \

 				$(objpfx)tst-cet-legacy-mod-5b.so

-tst-cet-legacy-5b-ENV = GLIBC_TUNABLES=glibc.tune.x86_ibt=off:glibc.tune.x86_shstk=off

+tst-cet-legacy-5b-ENV = GLIBC_TUNABLES=glibc.cpu.x86_ibt=off:glibc.cpu.x86_shstk=off

 $(objpfx)tst-cet-legacy-6b: $(libdl)

 $(objpfx)tst-cet-legacy-6b.out: $(objpfx)tst-cet-legacy-mod-6a.so \

 				$(objpfx)tst-cet-legacy-mod-6b.so

-tst-cet-legacy-6b-ENV = GLIBC_TUNABLES=glibc.tune.x86_ibt=off:glibc.tune.x86_shstk=off

+tst-cet-legacy-6b-ENV = GLIBC_TUNABLES=glibc.cpu.x86_ibt=off:glibc.cpu.x86_shstk=off

 endif

 endif

diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c

index 41f2d15fa5c8a756..3b268efbce627e6c 100644

--- a/sysdeps/x86/cpu-features.c

+++ b/sysdeps/x86/cpu-features.c

@@ -22,7 +22,7 @@

 #include <libc-pointer-arith.h>

 #if HAVE_TUNABLES

-# define TUNABLE_NAMESPACE tune

+# define TUNABLE_NAMESPACE cpu

 # include <unistd.h>		/* Get STDOUT_FILENO for _dl_printf.  */

 # include <elf/dl-tunables.h>

@@ -424,7 +424,7 @@ no_cpuid:

   /* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86.  */

 #if !HAVE_TUNABLES && defined SHARED

-  /* The glibc.tune.hwcap_mask tunable is initialized already, so no need to do

+  /* The glibc.cpu.hwcap_mask tunable is initialized already, so no need to do

      this.  */

   GLRO(dl_hwcap_mask) = HWCAP_IMPORTANT;

 #endif

@@ -499,7 +499,7 @@ no_cpuid:

 	  /* Disable IBT and/or SHSTK if they are enabled by kernel, but

 	     disabled by environment variable:

-	     GLIBC_TUNABLES=glibc.tune.hwcaps=-IBT,-SHSTK

+	     GLIBC_TUNABLES=glibc.cpu.hwcaps=-IBT,-SHSTK

 	   */

 	  unsigned int cet_feature = 0;

 	  if (!HAS_CPU_FEATURE (IBT))

diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h

index 347a4b118d007fd8..4c6d08c709eea204 100644

--- a/sysdeps/x86/cpu-features.h

+++ b/sysdeps/x86/cpu-features.h

@@ -141,7 +141,7 @@ struct cpu_features

   unsigned long int xsave_state_size;

   /* The full state size for XSAVE when XSAVEC is disabled by

-     GLIBC_TUNABLES=glibc.tune.hwcaps=-XSAVEC_Usable

+     GLIBC_TUNABLES=glibc.cpu.hwcaps=-XSAVEC_Usable

    */

   unsigned int xsave_state_full_size;

   unsigned int feature[FEATURE_INDEX_MAX];

diff --git a/sysdeps/x86/cpu-tunables.c b/sysdeps/x86/cpu-tunables.c

index fad6726882fa7e2d..2e5d37753713e975 100644

--- a/sysdeps/x86/cpu-tunables.c

+++ b/sysdeps/x86/cpu-tunables.c

@@ -17,7 +17,7 @@

    <http://www.gnu.org/licenses/>.  */

 #if HAVE_TUNABLES

-# define TUNABLE_NAMESPACE tune

+# define TUNABLE_NAMESPACE cpu

 # include <stdbool.h>

 # include <stdint.h>

 # include <unistd.h>		/* Get STDOUT_FILENO for _dl_printf.  */

@@ -116,7 +116,7 @@ TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *valp)

      the hardware which wasn't available when the selection was made.

      The environment variable:

-     GLIBC_TUNABLES=glibc.tune.hwcaps=-xxx,yyy,-zzz,....

+     GLIBC_TUNABLES=glibc.cpu.hwcaps=-xxx,yyy,-zzz,....

      can be used to enable CPU/ARCH feature yyy, disable CPU/ARCH feature

      yyy and zzz, where the feature name is case-sensitive and has to

diff --git a/sysdeps/x86/dl-cet.c b/sysdeps/x86/dl-cet.c

index ebc0d577e414c807..d481bddc27e5d7cc 100644

--- a/sysdeps/x86/dl-cet.c

+++ b/sysdeps/x86/dl-cet.c

@@ -72,7 +72,7 @@ dl_cet_check (struct link_map *m, const char *program)

 	  /* Enable IBT and SHSTK only if they are enabled in executable.

 	     NB: IBT and SHSTK may be disabled by environment variable:

-	     GLIBC_TUNABLES=glibc.tune.hwcaps=-IBT,-SHSTK

+	     GLIBC_TUNABLES=glibc.cpu.hwcaps=-IBT,-SHSTK

 	   */

 	  enable_ibt &= (HAS_CPU_FEATURE (IBT)

 			 && (enable_ibt_type == cet_always_on

diff --git a/sysdeps/x86/dl-tunables.list b/sysdeps/x86/dl-tunables.list

index 73886b1352316854..2a457d0eec9c3122 100644

--- a/sysdeps/x86/dl-tunables.list

+++ b/sysdeps/x86/dl-tunables.list

@@ -17,7 +17,7 @@

 # <http://www.gnu.org/licenses/>.

 glibc {

-  tune {

+  cpu {

     hwcaps {

       type: STRING

     }

diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile

index 9f1562f1b25a2df5..d51cf03ac92ebcc2 100644

--- a/sysdeps/x86_64/Makefile

+++ b/sysdeps/x86_64/Makefile

@@ -57,7 +57,7 @@ modules-names += x86_64/tst-x86_64mod-1

 LDFLAGS-tst-x86_64mod-1.so = -Wl,-soname,tst-x86_64mod-1.so

 ifneq (no,$(have-tunables))

 # Test the state size for XSAVE when XSAVEC is disabled.

-tst-x86_64-1-ENV = GLIBC_TUNABLES=glibc.tune.hwcaps=-XSAVEC_Usable

+tst-x86_64-1-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-XSAVEC_Usable

 endif

 $(objpfx)tst-x86_64-1: $(objpfx)x86_64/tst-x86_64mod-1.so

@@ -74,7 +74,7 @@ $(objpfx)tst-platform-1.out: $(objpfx)x86_64/tst-platformmod-2.so

 # Turn off AVX512F_Usable and AVX2_Usable so that GLRO(dl_platform) is

 # always set to x86_64.

 tst-platform-1-ENV = LD_PRELOAD=$(objpfx)\$$PLATFORM/tst-platformmod-2.so \

-	GLIBC_TUNABLES=glibc.tune.hwcaps=-AVX512F_Usable,-AVX2_Usable

+	GLIBC_TUNABLES=glibc.cpu.hwcaps=-AVX512F_Usable,-AVX2_Usable

 endif

 tests += tst-audit3 tst-audit4 tst-audit5 tst-audit6 tst-audit7 \