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x86: Update CPU feature detection [BZ #26149]

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1. Divide architecture features into the usable features and the preferred
features.  The usable features are for correctness and can be exported in
a stable ABI.  The preferred features are for performance and only for
glibc internal use.
2. Change struct cpu_features to

struct cpu_features
{
  struct cpu_features_basic basic;
  unsigned int *usable_p;
  struct cpuid_registers cpuid[COMMON_CPUID_INDEX_MAX];
  unsigned int usable[USABLE_FEATURE_INDEX_MAX];
  unsigned int preferred[PREFERRED_FEATURE_INDEX_MAX];
  ...
};

and initialize usable_p to pointer to the usable arary so that

struct cpu_features
{
  struct cpu_features_basic basic;
  unsigned int *usable_p;
  struct cpuid_registers cpuid[COMMON_CPUID_INDEX_MAX];
};

can be exported via a stable ABI.  The cpuid and usable arrays can be
expanded with backward binary compatibility for both .o and .so files.
3. Add COMMON_CPUID_INDEX_7_ECX_1 for AVX512_BF16.
4. Detect ENQCMD, PKS, AVX512_VP2INTERSECT, MD_CLEAR, SERIALIZE, HYBRID,
TSXLDTRK, L1D_FLUSH, CORE_CAPABILITIES and AVX512_BF16.
5. Rename CAPABILITIES to ARCH_CAPABILITIES.
6. Check if AVX512_VP2INTERSECT, AVX512_BF16 and PKU are usable.
7. Update CPU feature detection test.
This commit is contained in:
H.J. Lu
2020-06-17 06:34:46 -07:00
parent ea04f02131
commit ecbbadbf10
5 changed files with 265 additions and 387 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
sysdeps/x86/tst-get-cpu-features.c
View File

@ -174,15 +174,24 @@ do_test (void)
CHECK_CPU_FEATURE (CLDEMOTE);
CHECK_CPU_FEATURE (MOVDIRI);
CHECK_CPU_FEATURE (MOVDIR64B);
CHECK_CPU_FEATURE (ENQCMD);
CHECK_CPU_FEATURE (SGX_LC);
CHECK_CPU_FEATURE (PKS);
CHECK_CPU_FEATURE (AVX512_4VNNIW);
CHECK_CPU_FEATURE (AVX512_4FMAPS);
CHECK_CPU_FEATURE (FSRM);
CHECK_CPU_FEATURE (AVX512_VP2INTERSECT);
CHECK_CPU_FEATURE (MD_CLEAR);
CHECK_CPU_FEATURE (SERIALIZE);
CHECK_CPU_FEATURE (HYBRID);
CHECK_CPU_FEATURE (TSXLDTRK);
CHECK_CPU_FEATURE (PCONFIG);
CHECK_CPU_FEATURE (IBT);
CHECK_CPU_FEATURE (IBRS_IBPB);
CHECK_CPU_FEATURE (STIBP);
CHECK_CPU_FEATURE (CAPABILITIES);
CHECK_CPU_FEATURE (L1D_FLUSH);
CHECK_CPU_FEATURE (ARCH_CAPABILITIES);
CHECK_CPU_FEATURE (CORE_CAPABILITIES);
CHECK_CPU_FEATURE (SSBD);
CHECK_CPU_FEATURE (LAHF64_SAHF64);
CHECK_CPU_FEATURE (SVM);
@ -204,84 +213,36 @@ do_test (void)
CHECK_CPU_FEATURE (XSAVES);
CHECK_CPU_FEATURE (INVARIANT_TSC);
CHECK_CPU_FEATURE (WBNOINVD);
CHECK_CPU_FEATURE (AVX512_BF16);
printf ("Usable CPU features:\n");
CHECK_CPU_FEATURE_USABLE (SSE3);
CHECK_CPU_FEATURE_USABLE (PCLMULQDQ);
CHECK_CPU_FEATURE_USABLE (SSSE3);
CHECK_CPU_FEATURE_USABLE (FMA);
CHECK_CPU_FEATURE_USABLE (CMPXCHG16B);
CHECK_CPU_FEATURE_USABLE (SSE4_1);
CHECK_CPU_FEATURE_USABLE (SSE4_2);
CHECK_CPU_FEATURE_USABLE (MOVBE);
CHECK_CPU_FEATURE_USABLE (POPCNT);
CHECK_CPU_FEATURE_USABLE (AES);
CHECK_CPU_FEATURE_USABLE (XSAVE);
CHECK_CPU_FEATURE_USABLE (OSXSAVE);
CHECK_CPU_FEATURE_USABLE (AVX);
CHECK_CPU_FEATURE_USABLE (F16C);
CHECK_CPU_FEATURE_USABLE (RDRAND);
CHECK_CPU_FEATURE_USABLE (FPU);
CHECK_CPU_FEATURE_USABLE (TSC);
CHECK_CPU_FEATURE_USABLE (MSR);
CHECK_CPU_FEATURE_USABLE (CX8);
CHECK_CPU_FEATURE_USABLE (SEP);
CHECK_CPU_FEATURE_USABLE (CMOV);
CHECK_CPU_FEATURE_USABLE (CLFSH);
CHECK_CPU_FEATURE_USABLE (MMX);
CHECK_CPU_FEATURE_USABLE (FXSR);
CHECK_CPU_FEATURE_USABLE (SSE);
CHECK_CPU_FEATURE_USABLE (SSE2);
CHECK_CPU_FEATURE_USABLE (FSGSBASE);
CHECK_CPU_FEATURE_USABLE (BMI1);
CHECK_CPU_FEATURE_USABLE (HLE);
CHECK_CPU_FEATURE_USABLE (AVX2);
CHECK_CPU_FEATURE_USABLE (BMI2);
CHECK_CPU_FEATURE_USABLE (ERMS);
CHECK_CPU_FEATURE_USABLE (AVX512F);
CHECK_CPU_FEATURE_USABLE (AVX512DQ);
CHECK_CPU_FEATURE_USABLE (RDSEED);
CHECK_CPU_FEATURE_USABLE (ADX);
CHECK_CPU_FEATURE_USABLE (AVX512_IFMA);
CHECK_CPU_FEATURE_USABLE (CLFLUSHOPT);
CHECK_CPU_FEATURE_USABLE (CLWB);
CHECK_CPU_FEATURE_USABLE (AVX512PF);
CHECK_CPU_FEATURE_USABLE (AVX512ER);
CHECK_CPU_FEATURE_USABLE (AVX512CD);
CHECK_CPU_FEATURE_USABLE (SHA);
CHECK_CPU_FEATURE_USABLE (AVX512BW);
CHECK_CPU_FEATURE_USABLE (AVX512VL);
CHECK_CPU_FEATURE_USABLE (PREFETCHWT1);
CHECK_CPU_FEATURE_USABLE (AVX512_VBMI);
CHECK_CPU_FEATURE_USABLE (PKU);
CHECK_CPU_FEATURE_USABLE (AVX512_VBMI2);
CHECK_CPU_FEATURE_USABLE (GFNI);
CHECK_CPU_FEATURE_USABLE (VAES);
CHECK_CPU_FEATURE_USABLE (VPCLMULQDQ);
CHECK_CPU_FEATURE_USABLE (AVX512_VNNI);
CHECK_CPU_FEATURE_USABLE (AVX512_BITALG);
CHECK_CPU_FEATURE_USABLE (AVX512_VPOPCNTDQ);
CHECK_CPU_FEATURE_USABLE (RDPID);
CHECK_CPU_FEATURE_USABLE (CLDEMOTE);
CHECK_CPU_FEATURE_USABLE (MOVDIRI);
CHECK_CPU_FEATURE_USABLE (MOVDIR64B);
CHECK_CPU_FEATURE_USABLE (AVX512_4VNNIW);
CHECK_CPU_FEATURE_USABLE (AVX512_4FMAPS);
CHECK_CPU_FEATURE_USABLE (FSRM);
CHECK_CPU_FEATURE_USABLE (LAHF64_SAHF64);
CHECK_CPU_FEATURE_USABLE (LZCNT);
CHECK_CPU_FEATURE_USABLE (SSE4A);
CHECK_CPU_FEATURE_USABLE (PREFETCHW);
CHECK_CPU_FEATURE_USABLE (AVX512_VP2INTERSECT);
CHECK_CPU_FEATURE_USABLE (XOP);
CHECK_CPU_FEATURE_USABLE (FMA4);
CHECK_CPU_FEATURE_USABLE (TBM);
CHECK_CPU_FEATURE_USABLE (SYSCALL_SYSRET);
CHECK_CPU_FEATURE_USABLE (RDTSCP);
CHECK_CPU_FEATURE_USABLE (XSAVEOPT);
CHECK_CPU_FEATURE_USABLE (XSAVEC);
CHECK_CPU_FEATURE_USABLE (XGETBV_ECX_1);
CHECK_CPU_FEATURE_USABLE (XSAVES);
CHECK_CPU_FEATURE_USABLE (INVARIANT_TSC);
CHECK_CPU_FEATURE_USABLE (WBNOINVD);
CHECK_CPU_FEATURE_USABLE (AVX512_BF16);
return 0;
}