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5b99f172b8
glibc/sysdeps/x86
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H.J. Lu 5b99f172b8 x86: Check RTM_ALWAYS_ABORT for RTM [BZ #28033] 
From

https://www.intel.com/content/www/us/en/support/articles/000059422/processors.html

* Intel TSX will be disabled by default.
* The processor will force abort all Restricted Transactional Memory (RTM)
  transactions by default.
* A new CPUID bit CPUID.07H.0H.EDX[11](RTM_ALWAYS_ABORT) will be enumerated,
  which is set to indicate to updated software that the loaded microcode is
  forcing RTM abort.
* On processors that enumerate support for RTM, the CPUID enumeration bits
  for Intel TSX (CPUID.07H.0H.EBX[11] and CPUID.07H.0H.EBX[4]) continue to
  be set by default after microcode update.
* Workloads that were benefited from Intel TSX might experience a change
  in performance.
* System software may use a new bit in Model-Specific Register (MSR) 0x10F
  TSX_FORCE_ABORT[TSX_CPUID_CLEAR] functionality to clear the Hardware Lock
  Elision (HLE) and RTM bits to indicate to software that Intel TSX is
  disabled.

1. Add RTM_ALWAYS_ABORT to CPUID features.
2. Set RTM usable only if RTM_ALWAYS_ABORT isn't set.  This skips the
string/tst-memchr-rtm etc. testcases on the affected processors, which
always fail after a microcde update.
3. Check RTM feature, instead of usability, against /proc/cpuinfo.

This fixes BZ #28033.

(cherry picked from commit ea8e465a6b)
2022-02-01 07:12:35 -08:00
..
bits Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
fpu Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
nptl Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
__longjmp_cancel.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
atomic-machine.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
cacheinfo.c x86: Optimizing memcpy for AMD Zen architecture. 2020-10-30 13:04:09 +01:00
cet-tunables.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
check-cet.awk Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
configure x86: Support IBT and SHSTK in Intel CET [BZ #21598] 2018-07-16 14:08:27 -07:00
configure.ac x86: Support IBT and SHSTK in Intel CET [BZ #21598] 2018-07-16 14:08:27 -07:00
cpu-features-offsets.sym x86: Cleanup cpu-features-offsets.sym 2018-08-03 06:42:09 -07:00
cpu-features.c x86: Check RTM_ALWAYS_ABORT for RTM [BZ #28033] 2022-02-01 07:12:35 -08:00
cpu-features.h x86: Check RTM_ALWAYS_ABORT for RTM [BZ #28033] 2022-02-01 07:12:35 -08:00
cpu-tunables.c x86: Set Prefer_No_VZEROUPPER and add Prefer_AVX2_STRCMP 2022-01-27 11:40:18 -08:00
dl-cet.c x86: Set header.feature_1 in TCB for always-on CET [BZ #27177] 2021-01-13 08:21:58 -08:00
dl-get-cpu-features.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-hwcap.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-lookupcfg.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-procruntime.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-prop.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tunables.list Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
elide.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
float128-abi.h Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
fpu_control.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
hp-timing.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
init-arch.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
jmp_buf-ssp.sym x86: Support shadow stack pointer in setjmp/longjmp 2018-07-14 05:59:53 -07:00
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-start.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
libc-start.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
link_map.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
linkmap.h Rename bits/linkmap.h to linkmap.h (bug 14912). 2015-09-04 19:44:27 +00:00
longjmp.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Makeconfig Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
Makefile x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
string_private.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tininess.h
tst-cet-legacy-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-1a.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-2.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-2a.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-3.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-4.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-4a.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-4b.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-4c.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-5.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-5a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-5b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-6.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-6a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-6b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-mod-2.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-mod-4.c x86/CET: Add tests with legacy non-CET shared objects 2018-07-25 04:47:05 -07:00
tst-cet-legacy-mod-5.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-mod-5a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-5b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-5c.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-mod-6.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-mod-6a.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-6b.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-cet-legacy-mod-6c.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-cet-legacy-mod-6d.c Call _dl_open_check after relocation [BZ #24259] 2019-07-01 12:23:22 -07:00
tst-get-cpu-features-static.c
tst-get-cpu-features.c x86: Check RTM_ALWAYS_ABORT for RTM [BZ #28033] 2022-02-01 07:12:35 -08:00
tst-memchr-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-memcmp-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-memmove-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-memrchr-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-memset-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-setjmp-cet.c x86: Set header.feature_1 in TCB for always-on CET [BZ #27177] 2021-01-13 08:21:58 -08:00
tst-strchr-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-strcpy-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-string-rtm.h x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-strlen-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-strncmp-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
tst-strrchr-rtm.c x86: Add string/memory function tests in RTM region 2022-01-27 11:40:18 -08:00
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