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| author | Asaf Badouh <asaf.badouh@intel.com> | 2015-12-15 13:35:29 +0000 |
|---|---|---|
| committer | Asaf Badouh <asaf.badouh@intel.com> | 2015-12-15 13:35:29 +0000 |
| commit | 5acf66ff97843df85a697b38b091cdcc8decbd0a (patch) | |
| tree | 886601e488d46ac3385f89c31f20064286771d19 /llvm/lib/Support/Host.cpp | |
| parent | 801ee74167e9887f058dc2bf7bb19289ff842132 (diff) | |
| download | llvm-5acf66ff97843df85a697b38b091cdcc8decbd0a.zip llvm-5acf66ff97843df85a697b38b091cdcc8decbd0a.tar.gz llvm-5acf66ff97843df85a697b38b091cdcc8decbd0a.tar.bz2 | |
[x86] adding PKU feature flag
the feature flag is essential for RDPKRU and WRPKRU instruction
more about the instruction can be found in the SDM rev 56, vol 2 from http://www.intel.com/sdm
Differential Revision: http://reviews.llvm.org/D15491
llvm-svn: 255644
Diffstat (limited to 'llvm/lib/Support/Host.cpp')
| -rw-r--r-- | llvm/lib/Support/Host.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp index d7c9947..c0f9e07 100644 --- a/llvm/lib/Support/Host.cpp +++ b/llvm/lib/Support/Host.cpp @@ -812,6 +812,8 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) { Features["rdseed"] = HasLeaf7 && ((EBX >> 18) & 1); Features["adx"] = HasLeaf7 && ((EBX >> 19) & 1); Features["sha"] = HasLeaf7 && ((EBX >> 29) & 1); + // Enable protection keys + Features["pku"] = HasLeaf7 && ((ECX >> 4) & 1); // AVX512 is only supported if the OS supports the context save for it. Features["avx512f"] = HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save; |