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// Copyright © 2016 Zlatko Čalušić
//
// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file.
package sysinfo
import (
"strings"
"unsafe"
"github.com/AstroProfundis/sysinfo/cpuid"
)
// https://en.wikipedia.org/wiki/CPUID#EAX.3D0:_Get_vendor_ID
var hvmap = map[string]string{
"bhyve bhyve ": "bhyve",
"KVMKVMKVM": "kvm",
"Microsoft Hv": "hyperv",
" lrpepyh vr": "parallels",
"VMwareVMware": "vmware",
"XenVMMXenVMM": "xenhvm",
}
func isHypervisorActive() bool {
var info [4]uint32
cpuid.CPUID(&info, 0x1)
return info[2]&(1<<31) != 0
}
func getHypervisorCpuid(ax uint32) string {
var info [4]uint32
cpuid.CPUID(&info, ax)
return hvmap[strings.TrimRight(string((*[12]byte)(unsafe.Pointer(&info[1]))[:]), "\000")]
}
func (si *SysInfo) getHypervisor() {
if !isHypervisorActive() {
if hypervisorType := slurpFile("/sys/hypervisor/type"); hypervisorType != "" {
if hypervisorType == "xen" {
si.Node.Hypervisor = "xenpv"
}
}
return
}
// KVM has been caught to move its real signature to this leaf, and put something completely different in the
// standard location. So this leaf must be checked first.
if hv := getHypervisorCpuid(0x40000100); hv != "" {
si.Node.Hypervisor = hv
return
}
if hv := getHypervisorCpuid(0x40000000); hv != "" {
si.Node.Hypervisor = hv
return
}
// getBIOSInfo() must have run first, to detect BIOS vendor
if si.BIOS.Vendor == "Bochs" {
si.Node.Hypervisor = "bochs"
return
}
si.Node.Hypervisor = "unknown"
}
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