diff options
Diffstat (limited to 'pkg/cpuid')
| -rw-r--r-- | pkg/cpuid/cpuid.go | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/pkg/cpuid/cpuid.go b/pkg/cpuid/cpuid.go index 64e2e68f1..61441150e 100644 --- a/pkg/cpuid/cpuid.go +++ b/pkg/cpuid/cpuid.go @@ -446,6 +446,20 @@ const ( extendedFeatures // Returns some extended feature bits in edx and ecx. ) +// These are the extended floating point state features. They are used to +// enumerate floating point features in XCR0, XSTATE_BV, etc. +const ( + XSAVEFeatureX87 = 1 << 0 + XSAVEFeatureSSE = 1 << 1 + XSAVEFeatureAVX = 1 << 2 + XSAVEFeatureBNDREGS = 1 << 3 + XSAVEFeatureBNDCSR = 1 << 4 + XSAVEFeatureAVX512op = 1 << 5 + XSAVEFeatureAVX512zmm0 = 1 << 6 + XSAVEFeatureAVX512zmm16 = 1 << 7 + XSAVEFeaturePKRU = 1 << 9 +) + var cpuFreqMHz float64 // x86FeaturesFromString includes features from x86FeatureStrings and @@ -561,6 +575,26 @@ func (fs *FeatureSet) Intel() bool { return fs.VendorID == "GenuineIntel" } +// ErrIncompatible is returned by FeatureSet.HostCompatible if fs is not a +// subset of the host feature set. +type ErrIncompatible struct { + message string +} + +// Error implements error. +func (e ErrIncompatible) Error() string { + return e.message +} + +// CheckHostCompatible returns nil if fs is a subset of the host feature set. +func (fs *FeatureSet) CheckHostCompatible() error { + hfs := HostFeatureSet() + if diff := fs.Subtract(hfs); diff != nil { + return ErrIncompatible{fmt.Sprintf("CPU feature set %v incompatible with host feature set %v (missing: %v)", fs.FlagsString(false), hfs.FlagsString(false), diff)} + } + return nil +} + // Helper to convert 3 regs into 12-byte vendor ID. func vendorIDFromRegs(bx, cx, dx uint32) string { bytes := make([]byte, 0, 12) |