diff options
Diffstat (limited to 'pkg/cpuid/cpuid_x86.go')
| -rw-r--r-- | pkg/cpuid/cpuid_x86.go | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/pkg/cpuid/cpuid_x86.go b/pkg/cpuid/cpuid_x86.go index dc17cade8..a92d32d74 100644 --- a/pkg/cpuid/cpuid_x86.go +++ b/pkg/cpuid/cpuid_x86.go @@ -627,6 +627,17 @@ type FeatureSet struct { CacheLine uint32 } +// Clone returns a copy of fs. +func (fs *FeatureSet) Clone() *FeatureSet { + fs2 := *fs + fs2.Set = make(map[Feature]bool) + for f, b := range fs.Set { + fs2.Set[f] = b + } + fs2.Caches = append([]Cache(nil), fs.Caches...) + return &fs2 +} + // FlagsString prints out supported CPU flags. If cpuinfoOnly is true, it is // equivalent to the "flags" field in /proc/cpuinfo. func (fs *FeatureSet) FlagsString(cpuinfoOnly bool) string { @@ -961,13 +972,13 @@ func (fs *FeatureSet) UseXsaveopt() bool { // HostID executes a native CPUID instruction. func HostID(axArg, cxArg uint32) (ax, bx, cx, dx uint32) -// HostFeatureSet uses cpuid to get host values and construct a feature set +// getHostFeatureSet uses cpuid to get host values and construct a feature set // that matches that of the host machine. Note that there are several places // where there appear to be some unnecessary assignments between register names // (ax, bx, cx, or dx) and featureBlockN variables. This is to explicitly show // where the different feature blocks come from, to make the code easier to // inspect and read. -func HostFeatureSet() *FeatureSet { +func getHostFeatureSet() *FeatureSet { // eax=0 gets max supported feature and vendor ID. _, bx, cx, dx := HostID(0, 0) vendorID := vendorIDFromRegs(bx, cx, dx) |