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glibc/sysdeps/x86/tst-cpu-features-cpuinfo.c

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x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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/* Test CPU feature data against /proc/cpuinfo.
This file is part of the GNU C Library.
Update copyright dates with scripts/update-copyrights
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Copyright (C) 2012-2024 Free Software Foundation, Inc.
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873) AMD define different flags for IRPB, IBRS, and STIPBP [1], so new x86_64_cpu are added and IBRS_IBPB is only tested for Intel. The SSDB is also defined and implemented different on AMD [2], and also a new AMD_SSDB flag is added. It should map to the cpuinfo 'ssdb' on recent AMD cpus. It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static on recent AMD cpus. Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X. [1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf [2] https://bugzilla.kernel.org/show_bug.cgi?id=199889 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-06-23 03:41:28 +08:00
#include <cpu-features.h>
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873) AMD define different flags for IRPB, IBRS, and STIPBP [1], so new x86_64_cpu are added and IBRS_IBPB is only tested for Intel. The SSDB is also defined and implemented different on AMD [2], and also a new AMD_SSDB flag is added. It should map to the cpuinfo 'ssdb' on recent AMD cpus. It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static on recent AMD cpus. Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X. [1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf [2] https://bugzilla.kernel.org/show_bug.cgi?id=199889 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-06-23 03:41:28 +08:00
#include <stdbool.h>
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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static char *cpu_flags;
/* Search for flags in /proc/cpuinfo and store line
in cpu_flags. */
void
get_cpuinfo (void)
{
FILE *f;
char *line = NULL;
size_t len = 0;
ssize_t read;
f = fopen ("/proc/cpuinfo", "r");
if (f == NULL)
{
printf ("cannot open /proc/cpuinfo\n");
exit (1);
}
while ((read = getline (&line, &len, f)) != -1)
{
if (strncmp (line, "flags", 5) == 0)
{
cpu_flags = strdup (line);
break;
}
}
fclose (f);
free (line);
}
int
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
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check_proc (const char *proc_name, const char *search_name, int flag,
x86: Install <bits/platform/x86.h> [BZ #27958] 1. Install <bits/platform/x86.h> for <sys/platform/x86.h> which includes <bits/platform/x86.h>. 2. Rename HAS_CPU_FEATURE to CPU_FEATURE_PRESENT which checks if the processor has the feature. 3. Rename CPU_FEATURE_USABLE to CPU_FEATURE_ACTIVE which checks if the feature is active. There may be other preconditions, like sufficient stack space or further setup for AMX, which must be satisfied before the feature can be used. This fixes BZ #27958. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-06-05 21:42:20 +08:00
int active, const char *name)
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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{
int found = 0;
printf ("Checking %s:\n", name);
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
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printf (" %s: %d\n", name, flag);
char *str = strstr (cpu_flags, search_name);
if (str == NULL)
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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{
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
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/* If searching for " XXX " failed, try " XXX\n". */
size_t len = strlen (search_name);
char buffer[80];
if (len >= sizeof buffer)
abort ();
memcpy (buffer, search_name, len + 1);
buffer[len - 1] = '\n';
str = strstr (cpu_flags, buffer);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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}
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
if (str != NULL)
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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found = 1;
printf (" cpuinfo (%s): %d\n", proc_name, found);
if (found != flag)
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
{
x86: Install <bits/platform/x86.h> [BZ #27958] 1. Install <bits/platform/x86.h> for <sys/platform/x86.h> which includes <bits/platform/x86.h>. 2. Rename HAS_CPU_FEATURE to CPU_FEATURE_PRESENT which checks if the processor has the feature. 3. Rename CPU_FEATURE_USABLE to CPU_FEATURE_ACTIVE which checks if the feature is active. There may be other preconditions, like sufficient stack space or further setup for AMX, which must be satisfied before the feature can be used. This fixes BZ #27958. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-06-05 21:42:20 +08:00
if (found || active)
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
printf (" *** failure ***\n");
else
{
printf (" *** missing in /proc/cpuinfo ***\n");
return 0;
}
}
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
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return (found != flag);
}
#define CHECK_PROC(str, name) \
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
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check_proc (#str, " "#str" ", HAS_CPU_FEATURE (name), \
CPU_FEATURE_USABLE (name), \
"HAS_CPU_FEATURE (" #name ")")
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
x86: Set FSGSBASE to active if enabled by kernel Linux kernel uses AT_HWCAP2 to indicate if FSGSBASE instructions are enabled. If the HWCAP2_FSGSBASE bit in AT_HWCAP2 is set, FSGSBASE instructions can be used in user space. Define dl_check_hwcap2 to set the FSGSBASE feature to active on Linux when the HWCAP2_FSGSBASE bit is set. Add a test to verify that FSGSBASE is active on current kernels. NB: This test will fail if the kernel doesn't set the HWCAP2_FSGSBASE bit in AT_HWCAP2 while fsgsbase shows up in /proc/cpuinfo. Reviewed-by: Florian Weimer <fweimer@redhat.com>
2023-03-16 08:42:54 +08:00
#define CHECK_PROC_ACTIVE(str, name) \
check_proc (#str, " "#str" ", CPU_FEATURE_USABLE (name), \
CPU_FEATURE_USABLE (name), \
"CPU_FEATURE_USABLE (" #name ")")
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
static int
do_test (int argc, char **argv)
{
int fails = 0;
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873) AMD define different flags for IRPB, IBRS, and STIPBP [1], so new x86_64_cpu are added and IBRS_IBPB is only tested for Intel. The SSDB is also defined and implemented different on AMD [2], and also a new AMD_SSDB flag is added. It should map to the cpuinfo 'ssdb' on recent AMD cpus. It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static on recent AMD cpus. Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X. [1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf [2] https://bugzilla.kernel.org/show_bug.cgi?id=199889 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-06-23 03:41:28 +08:00
const struct cpu_features *cpu_features = __get_cpu_features ();
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
get_cpuinfo ();
fails += CHECK_PROC (acpi, ACPI);
fails += CHECK_PROC (adx, ADX);
fails += CHECK_PROC (apic, APIC);
fails += CHECK_PROC (aes, AES);
fails += CHECK_PROC (amx_bf16, AMX_BF16);
fails += CHECK_PROC (amx_int8, AMX_INT8);
fails += CHECK_PROC (amx_tile, AMX_TILE);
fails += CHECK_PROC (arch_capabilities, ARCH_CAPABILITIES);
fails += CHECK_PROC (avx, AVX);
fails += CHECK_PROC (avx2, AVX2);
fails += CHECK_PROC (avx512_4fmaps, AVX512_4FMAPS);
fails += CHECK_PROC (avx512_4vnniw, AVX512_4VNNIW);
fails += CHECK_PROC (avx512_bf16, AVX512_BF16);
fails += CHECK_PROC (avx512_bitalg, AVX512_BITALG);
fails += CHECK_PROC (avx512ifma, AVX512_IFMA);
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
fails += CHECK_PROC (avx512vbmi, AVX512_VBMI);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (avx512_vbmi2, AVX512_VBMI2);
fails += CHECK_PROC (avx512_vnni, AVX512_VNNI);
fails += CHECK_PROC (avx512_vp2intersect, AVX512_VP2INTERSECT);
fails += CHECK_PROC (avx512_vpopcntdq, AVX512_VPOPCNTDQ);
fails += CHECK_PROC (avx512bw, AVX512BW);
fails += CHECK_PROC (avx512cd, AVX512CD);
fails += CHECK_PROC (avx512er, AVX512ER);
fails += CHECK_PROC (avx512dq, AVX512DQ);
fails += CHECK_PROC (avx512f, AVX512F);
fails += CHECK_PROC (avx512pf, AVX512PF);
fails += CHECK_PROC (avx512vl, AVX512VL);
fails += CHECK_PROC (bmi1, BMI1);
fails += CHECK_PROC (bmi2, BMI2);
fails += CHECK_PROC (cldemote, CLDEMOTE);
fails += CHECK_PROC (clflushopt, CLFLUSHOPT);
fails += CHECK_PROC (clflush, CLFSH);
fails += CHECK_PROC (clwb, CLWB);
fails += CHECK_PROC (cmov, CMOV);
fails += CHECK_PROC (cx16, CMPXCHG16B);
fails += CHECK_PROC (cnxt_id, CNXT_ID);
fails += CHECK_PROC (core_capabilities, CORE_CAPABILITIES);
fails += CHECK_PROC (cx8, CX8);
fails += CHECK_PROC (dca, DCA);
fails += CHECK_PROC (de, DE);
fails += CHECK_PROC (zero_fcs_fds, DEPR_FPU_CS_DS);
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
fails += CHECK_PROC (dts, DS);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (ds_cpl, DS_CPL);
fails += CHECK_PROC (dtes64, DTES64);
fails += CHECK_PROC (est, EIST);
fails += CHECK_PROC (enqcmd, ENQCMD);
fails += CHECK_PROC (erms, ERMS);
fails += CHECK_PROC (f16c, F16C);
fails += CHECK_PROC (fma, FMA);
fails += CHECK_PROC (fma4, FMA4);
fails += CHECK_PROC (fpu, FPU);
fails += CHECK_PROC (fsgsbase, FSGSBASE);
fails += CHECK_PROC (fsrm, FSRM);
fails += CHECK_PROC (fxsr, FXSR);
fails += CHECK_PROC (gfni, GFNI);
fails += CHECK_PROC (hle, HLE);
fails += CHECK_PROC (ht, HTT);
fails += CHECK_PROC (hybrid, HYBRID);
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873) AMD define different flags for IRPB, IBRS, and STIPBP [1], so new x86_64_cpu are added and IBRS_IBPB is only tested for Intel. The SSDB is also defined and implemented different on AMD [2], and also a new AMD_SSDB flag is added. It should map to the cpuinfo 'ssdb' on recent AMD cpus. It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static on recent AMD cpus. Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X. [1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf [2] https://bugzilla.kernel.org/show_bug.cgi?id=199889 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-06-23 03:41:28 +08:00
if (cpu_features->basic.kind == arch_kind_intel)
{
fails += CHECK_PROC (ibrs, IBRS_IBPB);
fails += CHECK_PROC (stibp, STIBP);
}
else if (cpu_features->basic.kind == arch_kind_amd)
{
fails += CHECK_PROC (ibpb, AMD_IBPB);
elf: Fix tst-cpu-features-cpuinfo for KVM guests on some AMD systems [BZ #28704] On KVM guests running on some AMD systems, the IBRS feature is reported as a synthetic feature using the Intel feature, while the cpuinfo entry keeps the same. Handle that by first checking the presence of the Intel feature on AMD systems. Fixes bug 28704.
2021-12-16 06:46:19 +08:00
/* The IBRS feature on AMD processors is reported using the Intel feature
* on KVM guests (synthetic bit). In both cases the cpuinfo entry is the
* same. */
if (HAS_CPU_FEATURE (IBRS_IBPB))
fails += CHECK_PROC (ibrs, IBRS_IBPB);
else
fails += CHECK_PROC (ibrs, AMD_IBRS);
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873) AMD define different flags for IRPB, IBRS, and STIPBP [1], so new x86_64_cpu are added and IBRS_IBPB is only tested for Intel. The SSDB is also defined and implemented different on AMD [2], and also a new AMD_SSDB flag is added. It should map to the cpuinfo 'ssdb' on recent AMD cpus. It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static on recent AMD cpus. Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X. [1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf [2] https://bugzilla.kernel.org/show_bug.cgi?id=199889 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-06-23 03:41:28 +08:00
fails += CHECK_PROC (stibp, AMD_STIBP);
}
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (ibt, IBT);
fails += CHECK_PROC (invariant_tsc, INVARIANT_TSC);
fails += CHECK_PROC (invpcid, INVPCID);
fails += CHECK_PROC (flush_l1d, L1D_FLUSH);
fails += CHECK_PROC (lahf_lm, LAHF64_SAHF64);
fails += CHECK_PROC (lm, LM);
fails += CHECK_PROC (lwp, LWP);
fails += CHECK_PROC (abm, LZCNT);
fails += CHECK_PROC (mca, MCA);
fails += CHECK_PROC (mce, MCE);
fails += CHECK_PROC (md_clear, MD_CLEAR);
fails += CHECK_PROC (mmx, MMX);
fails += CHECK_PROC (monitor, MONITOR);
fails += CHECK_PROC (movbe, MOVBE);
fails += CHECK_PROC (movdiri, MOVDIRI);
fails += CHECK_PROC (movdir64b, MOVDIR64B);
fails += CHECK_PROC (mpx, MPX);
fails += CHECK_PROC (msr, MSR);
fails += CHECK_PROC (mtrr, MTRR);
fails += CHECK_PROC (nx, NX);
fails += CHECK_PROC (ospke, OSPKE);
#if 0
/* NB: /proc/cpuinfo doesn't report this feature. */
fails += CHECK_PROC (osxsave, OSXSAVE);
#endif
fails += CHECK_PROC (pae, PAE);
fails += CHECK_PROC (pdpe1gb, PAGE1GB);
fails += CHECK_PROC (pat, PAT);
fails += CHECK_PROC (pbe, PBE);
fails += CHECK_PROC (pcid, PCID);
fails += CHECK_PROC (pclmulqdq, PCLMULQDQ);
fails += CHECK_PROC (pconfig, PCONFIG);
fails += CHECK_PROC (pdcm, PDCM);
fails += CHECK_PROC (pge, PGE);
fails += CHECK_PROC (pks, PKS);
fails += CHECK_PROC (pku, PKU);
fails += CHECK_PROC (popcnt, POPCNT);
fails += CHECK_PROC (3dnowprefetch, PREFETCHW);
x86: Don't check PREFETCHWT1 in tst-cpu-features-cpuinfo.c Don't check PREFETCHWT1 against /proc/cpuinfo since kernel doesn't report PREFETCHWT1 in /proc/cpuinfo. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2023-03-10 11:32:54 +08:00
#if 0
/* NB: /proc/cpuinfo doesn't report this feature. */
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (prefetchwt1, PREFETCHWT1);
x86: Don't check PREFETCHWT1 in tst-cpu-features-cpuinfo.c Don't check PREFETCHWT1 against /proc/cpuinfo since kernel doesn't report PREFETCHWT1 in /proc/cpuinfo. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2023-03-10 11:32:54 +08:00
#endif
x86: Don't check PTWRITE in tst-cpu-features-cpuinfo.c Don't check PTWRITE against /proc/cpuinfo since kernel doesn't report PTWRITE in /proc/cpuinfo.
2022-01-27 04:18:21 +08:00
#if 0
/* NB: /proc/cpuinfo doesn't report this feature. */
x86: Add PTWRITE feature detection [BZ #27346] 1. Add CPUID_INDEX_14_ECX_0 for CPUID leaf 0x14 to detect PTWRITE feature in EBX of CPUID leaf 0x14 with ECX == 0. 2. Add PTWRITE detection to CPU feature tests. 3. Add 2 static CPU feature tests.
2021-02-05 02:39:34 +08:00
fails += CHECK_PROC (ptwrite, PTWRITE);
x86: Don't check PTWRITE in tst-cpu-features-cpuinfo.c Don't check PTWRITE against /proc/cpuinfo since kernel doesn't report PTWRITE in /proc/cpuinfo.
2022-01-27 04:18:21 +08:00
#endif
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (pse, PSE);
fails += CHECK_PROC (pse36, PSE_36);
fails += CHECK_PROC (psn, PSN);
fails += CHECK_PROC (rdpid, RDPID);
fails += CHECK_PROC (rdrand, RDRAND);
fails += CHECK_PROC (rdseed, RDSEED);
fails += CHECK_PROC (rdt_a, RDT_A);
fails += CHECK_PROC (cqm, RDT_M);
fails += CHECK_PROC (rdtscp, RDTSCP);
fails += CHECK_PROC (rtm, RTM);
fails += CHECK_PROC (sdbg, SDBG);
fails += CHECK_PROC (sep, SEP);
fails += CHECK_PROC (serialize, SERIALIZE);
fails += CHECK_PROC (sgx, SGX);
fails += CHECK_PROC (sgx_lc, SGX_LC);
fails += CHECK_PROC (sha_ni, SHA);
x86/cet: Check user_shstk in /proc/cpuinfo Linux kernel reports CPU shadow stack feature in /proc/cpuinfo as user_shstk, instead of shstk.
2023-12-17 00:53:10 +08:00
fails += CHECK_PROC (user_shstk, SHSTK);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (smap, SMAP);
fails += CHECK_PROC (smep, SMEP);
fails += CHECK_PROC (smx, SMX);
fails += CHECK_PROC (ss, SS);
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873) AMD define different flags for IRPB, IBRS, and STIPBP [1], so new x86_64_cpu are added and IBRS_IBPB is only tested for Intel. The SSDB is also defined and implemented different on AMD [2], and also a new AMD_SSDB flag is added. It should map to the cpuinfo 'ssdb' on recent AMD cpus. It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static on recent AMD cpus. Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X. [1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf [2] https://bugzilla.kernel.org/show_bug.cgi?id=199889 Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-06-23 03:41:28 +08:00
if (cpu_features->basic.kind == arch_kind_intel)
fails += CHECK_PROC (ssbd, SSBD);
else if (cpu_features->basic.kind == arch_kind_amd)
elf: Fix tst-cpu-features-cpuinfo on some AMD systems (BZ #28090) The SSBD feature is implemented in 2 different ways on AMD processors: newer systems (Zen3) provides AMD_SSBD (function 8000_0008, EBX[24]), while older system provides AMD_VIRT_SSBD (function 8000_0008, EBX[25]). However for AMD_VIRT_SSBD, kernel shows both 'ssdb' and 'virt_ssdb' on /proc/cpuinfo; while for AMD_SSBD only 'ssdb' is provided. This now check is AMD_SSBD is set to check for 'ssbd', otherwise check if AMD_VIRT_SSDB is set to check for 'virt_ssbd'. Checked on x86_64-linux-gnu on a Ryzen 9 5900x. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2021-07-15 19:52:44 +08:00
{
/* This feature is implemented in 2 different ways on AMD processors:
newer systems provides AMD_SSBD (function 8000_0008, EBX[24]),
while older system proviseds AMD_VIRT_SSBD (function 8000_008,
EBX[25]). However for AMD_VIRT_SSBD, kernel shows both 'ssbd'
and 'virt_ssbd' on /proc/cpuinfo; while for AMD_SSBD only 'ssbd'
is provided. */
if (HAS_CPU_FEATURE (AMD_SSBD))
fails += CHECK_PROC (ssbd, AMD_SSBD);
else if (HAS_CPU_FEATURE (AMD_VIRT_SSBD))
fails += CHECK_PROC (virt_ssbd, AMD_VIRT_SSBD);
}
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (sse, SSE);
fails += CHECK_PROC (sse2, SSE2);
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
fails += CHECK_PROC (pni, SSE3);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (sse4_1, SSE4_1);
fails += CHECK_PROC (sse4_2, SSE4_2);
fails += CHECK_PROC (sse4a, SSE4A);
fails += CHECK_PROC (ssse3, SSSE3);
fails += CHECK_PROC (svm, SVM);
#ifdef __x86_64__
/* NB: SYSCALL_SYSRET is 64-bit only. */
fails += CHECK_PROC (syscall, SYSCALL_SYSRET);
#endif
fails += CHECK_PROC (tbm, TBM);
fails += CHECK_PROC (tm, TM);
fails += CHECK_PROC (tm2, TM2);
fails += CHECK_PROC (intel_pt, TRACE);
fails += CHECK_PROC (tsc, TSC);
fails += CHECK_PROC (tsc_adjust, TSC_ADJUST);
x86: Properly match CPU features in /proc/cpuinfo [BZ #27222] Search " YYY " and " YYY\n", instead of "YYY", to avoid matching "XXXYYYZZZ" with "YYY". Update /proc/cpuinfo CPU feature names: /proc/cpuinfo glibc ------------------------------------------------ avx512vbmi AVX512_VBMI dts DS pni SSE3 tsc_deadline_timer TSC_DEADLINE
2021-01-22 03:12:30 +08:00
fails += CHECK_PROC (tsc_deadline_timer, TSC_DEADLINE);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (tsxldtrk, TSXLDTRK);
fails += CHECK_PROC (umip, UMIP);
fails += CHECK_PROC (vaes, VAES);
fails += CHECK_PROC (vme, VME);
fails += CHECK_PROC (vmx, VMX);
fails += CHECK_PROC (vpclmulqdq, VPCLMULQDQ);
fails += CHECK_PROC (waitpkg, WAITPKG);
fails += CHECK_PROC (wbnoinvd, WBNOINVD);
fails += CHECK_PROC (x2apic, X2APIC);
x86: Don't check XFD against /proc/cpuinfo Since /proc/cpuinfo doesn't report XFD, don't check it against /proc/cpuinfo.
2024-02-28 03:43:39 +08:00
#if 0
/* NB: /proc/cpuinfo doesn't report this feature. */
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (xfd, XFD);
x86: Don't check XFD against /proc/cpuinfo Since /proc/cpuinfo doesn't report XFD, don't check it against /proc/cpuinfo.
2024-02-28 03:43:39 +08:00
#endif
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
fails += CHECK_PROC (xgetbv1, XGETBV_ECX_1);
fails += CHECK_PROC (xop, XOP);
fails += CHECK_PROC (xsave, XSAVE);
fails += CHECK_PROC (xsavec, XSAVEC);
fails += CHECK_PROC (xsaveopt, XSAVEOPT);
fails += CHECK_PROC (xsaves, XSAVES);
fails += CHECK_PROC (xtpr, XTPRUPDCTRL);
x86: Set FSGSBASE to active if enabled by kernel Linux kernel uses AT_HWCAP2 to indicate if FSGSBASE instructions are enabled. If the HWCAP2_FSGSBASE bit in AT_HWCAP2 is set, FSGSBASE instructions can be used in user space. Define dl_check_hwcap2 to set the FSGSBASE feature to active on Linux when the HWCAP2_FSGSBASE bit is set. Add a test to verify that FSGSBASE is active on current kernels. NB: This test will fail if the kernel doesn't set the HWCAP2_FSGSBASE bit in AT_HWCAP2 while fsgsbase shows up in /proc/cpuinfo. Reviewed-by: Florian Weimer <fweimer@redhat.com>
2023-03-16 08:42:54 +08:00
fails += CHECK_PROC_ACTIVE (fsgsbase, FSGSBASE);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 09:30:54 +08:00
printf ("%d differences between /proc/cpuinfo and glibc code.\n", fails);
return (fails != 0);
}
#include "../../../test-skeleton.c"
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