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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-02-04 10:39:34 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-02-07 08:01:14 -0800 |
| commit | 5ab25c88758810269607a066fcac399e29863510 (patch) | |
| tree | fff85c2b2b481b413d71872bd5753f870557d89a /sysdeps/x86/cpu-features.c | |
| parent | c3479fb7939898ec22c655c383454d6e8b982a67 (diff) | |
| download | glibc-5ab25c88758810269607a066fcac399e29863510.tar glibc-5ab25c88758810269607a066fcac399e29863510.tar.gz glibc-5ab25c88758810269607a066fcac399e29863510.tar.bz2 glibc-5ab25c88758810269607a066fcac399e29863510.zip | |
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.
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index 7996ed0cd2..d7248cbb45 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -97,6 +97,7 @@ update_usable (struct cpu_features *cpu_features) CPU_FEATURE_SET_USABLE (cpu_features, FZLRM); CPU_FEATURE_SET_USABLE (cpu_features, FSRS); CPU_FEATURE_SET_USABLE (cpu_features, FSRCS); + CPU_FEATURE_SET_USABLE (cpu_features, PTWRITE); /* Can we call xgetbv? */ if (CPU_FEATURES_CPU_P (cpu_features, OSXSAVE)) @@ -359,6 +360,13 @@ get_common_indices (struct cpu_features *cpu_features, cpu_features->features[CPUID_INDEX_D_ECX_1].cpuid.ecx, cpu_features->features[CPUID_INDEX_D_ECX_1].cpuid.edx); + if (cpu_features->basic.max_cpuid >= 0x14) + __cpuid_count (0x14, 0, + cpu_features->features[CPUID_INDEX_14_ECX_0].cpuid.eax, + cpu_features->features[CPUID_INDEX_14_ECX_0].cpuid.ebx, + cpu_features->features[CPUID_INDEX_14_ECX_0].cpuid.ecx, + cpu_features->features[CPUID_INDEX_14_ECX_0].cpuid.edx); + if (cpu_features->basic.max_cpuid >= 0x19) __cpuid_count (0x19, 0, cpu_features->features[CPUID_INDEX_19].cpuid.eax, |