RenatoEurope Posted April 2, 2021 Share Posted April 2, 2021 Hi, below you can find the XML configuration file of one of my virtual machines. Specifically I can see in that conf file the following section> <cpu mode='host-passthrough' check='none' migratable='on'> <topology sockets='1' dies='1' cores='8' threads='2'/> <cache mode='passthrough'/> <feature policy='require' name='topoext'/> </cpu> but in the command line I find: <qemu:commandline> <qemu:arg value='-usb'/> <qemu:arg value='-device'/> <qemu:arg value='usb-kbd,bus=usb-bus.0'/> <qemu:arg value='-device'/> <qemu:arg value='************************'/> <qemu:arg value='-smbios'/> <qemu:arg value='type=2'/> <qemu:arg value='-cpu'/> <qemu:arg value='Penryn,kvm=on,vendor=GenuineIntel,+invtsc,vmware-cpuid-freq=on,+pcid,+ssse3,+sse4.2,+popcnt,+avx,+aes,+xsave,+xsaveopt,check'/> </qemu:commandline> So the question is: with this configuration, am I getting hardware passthrough, which implies the CPU is a threadripper 3970x or am I passing through a Penryn, Genuine Intel? <?xml version='1.0' encoding='UTF-8'?> <domain type='kvm' id='1' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>Macinabox Catalina</name> <uuid>8c09667c-b80e-4448-91b1-9381f1fd24c6</uuid> <description>MacOS Catalina</description> <metadata> <vmtemplate xmlns="unraid" name="Windows 10" icon="default.png" os="osx"/> </metadata> <memory unit='KiB'>17301504</memory> <currentMemory unit='KiB'>17301504</currentMemory> <memoryBacking> <nosharepages/> </memoryBacking> <vcpu placement='static'>16</vcpu> <cputune> <vcpupin vcpu='0' cpuset='1'/> <vcpupin vcpu='1' cpuset='2'/> <vcpupin vcpu='2' cpuset='3'/> <vcpupin vcpu='3' cpuset='4'/> <vcpupin vcpu='4' cpuset='5'/> <vcpupin vcpu='5' cpuset='6'/> <vcpupin vcpu='6' cpuset='7'/> <vcpupin vcpu='7' cpuset='8'/> <vcpupin vcpu='8' cpuset='9'/> <vcpupin vcpu='9' cpuset='10'/> <vcpupin vcpu='10' cpuset='11'/> <vcpupin vcpu='11' cpuset='12'/> <vcpupin vcpu='12' cpuset='28'/> <vcpupin vcpu='13' cpuset='29'/> <vcpupin vcpu='14' cpuset='30'/> <vcpupin vcpu='15' cpuset='31'/> </cputune> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='pc-q35-5.1'>hvm</type> <loader readonly='yes' type='pflash'>/mnt/user/system/custom_ovmf/Macinabox_CODE-pure-efi.fd</loader> <nvram>/etc/libvirt/qemu/nvram/8c09667c-b80e-4448-91b1-9381f1fd24c6_VARS-pure-efi.fd</nvram> </os> <features> <acpi/> <apic/> </features> <cpu mode='host-passthrough' check='none' migratable='on'> <topology sockets='1' dies='1' cores='8' threads='2'/> <cache mode='passthrough'/> <feature policy='require' name='topoext'/> </cpu> <clock offset='utc'> <timer name='rtc' tickpolicy='catchup'/> <timer name='pit' tickpolicy='delay'/> <timer name='hpet' present='no'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/local/sbin/qemu</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writeback'/> <source file='/mnt/cache/domains/Macinabox Catalina/macos_disk.img' index='2'/> <backingStore/> <target dev='hdc' bus='sata'/> <boot order='1'/> <alias name='sata0-0-2'/> <address type='drive' controller='0' bus='0' target='0' unit='2'/> </disk> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='writeback'/> <source dev='//dev/disk/by-id/ata-CT1000BX500SSD1_2020E2A2DEBF-part6' index='1'/> <backingStore/> <target dev='hdd' bus='sata'/> <alias name='sata0-0-3'/> <address type='drive' controller='0' bus='0' target='0' unit='3'/> </disk> <controller type='pci' index='0' model='pcie-root'> <alias name='pcie.0'/> </controller> <controller type='pci' index='1' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='1' port='0xb'/> <alias name='pci.1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x3'/> </controller> <controller type='pci' index='2' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='2' port='0xc'/> <alias name='pci.2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x4'/> </controller> <controller type='pci' index='3' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='3' port='0xd'/> <alias name='pci.3'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x5'/> </controller> <controller type='pci' index='4' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='4' port='0x13'/> <alias name='pci.4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/> </controller> <controller type='pci' index='5' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='5' port='0x8'/> <alias name='pci.5'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0' multifunction='on'/> </controller> <controller type='pci' index='6' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='6' port='0x9'/> <alias name='pci.6'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='pci' index='7' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='7' port='0xa'/> <alias name='pci.7'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='virtio-serial' index='0'> <alias name='virtio-serial0'/> <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/> </controller> <controller type='sata' index='0'> <alias name='ide'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> </controller> <controller type='usb' index='0' model='ich9-ehci1'> <alias name='usb'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <alias name='usb'/> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <alias name='usb'/> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <alias name='usb'/> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/> </controller> <interface type='bridge'> <mac address='52:54:00:c7:5a:3e'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='e1000-82545em'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/0'/> <target type='isa-serial' port='0'> <model name='isa-serial'/> </target> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/0'> <source path='/dev/pts/0'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <channel type='unix'> <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-1-Macinabox Catalina/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0' state='connected'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='tablet' bus='usb'> <alias name='input0'/> <address type='usb' bus='0' port='1'/> </input> <input type='mouse' bus='ps2'> <alias name='input1'/> </input> <input type='keyboard' bus='ps2'> <alias name='input2'/> </input> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x5d' slot='0x00' function='0x0'/> </source> <alias name='hostdev0'/> <rom file='/mnt/user/isos/vbios/NewVega64.rom'/> <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x5d' slot='0x00' function='0x1'/> </source> <alias name='hostdev1'/> <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x23' slot='0x00' function='0x3'/> </source> <alias name='hostdev2'/> <address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x46' slot='0x00' function='0x3'/> </source> <alias name='hostdev3'/> <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x53' slot='0x00' function='0x0'/> </source> <alias name='hostdev4'/> <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/> </hostdev> <memballoon model='none'/> </devices> <seclabel type='dynamic' model='dac' relabel='yes'> <label>+0:+100</label> <imagelabel>+0:+100</imagelabel> </seclabel> <qemu:commandline> <qemu:arg value='-usb'/> <qemu:arg value='-device'/> <qemu:arg value='usb-kbd,bus=usb-bus.0'/> <qemu:arg value='-device'/> <qemu:arg value='************************'/> <qemu:arg value='-smbios'/> <qemu:arg value='type=2'/> <qemu:arg value='-cpu'/> <qemu:arg value='Penryn,kvm=on,vendor=GenuineIntel,+invtsc,vmware-cpuid-freq=on,+pcid,+ssse3,+sse4.2,+popcnt,+avx,+aes,+xsave,+xsaveopt,check'/> </qemu:commandline> </domain> Quote Link to comment
John_M Posted April 2, 2021 Share Posted April 2, 2021 That's a template for a Hackintosh VM, isn't it? You're passing through 8 real cores, each with two threads BUT because macOS expects a GeniuneIntel CPU they are being faked as Penryn cores. If you create a normal Windows VM and run CPU-Z, you'll see them as AuthenticAMD cores, as expected. Quote Link to comment
RenatoEurope Posted April 3, 2021 Author Share Posted April 3, 2021 13 hours ago, John_M said: That's a template for a Hackintosh VM, isn't it? You're passing through 8 real cores, each with two threads BUT because macOS expects a GeniuneIntel CPU they are being faked as Penryn cores. If you create a normal Windows VM and run CPU-Z, you'll see them as AuthenticAMD cores, as expected. Hi John, thank uyou for your answer. That is indeed a VM for a hackintosh. the reason I am investigating this is becasue I know one can ran a ryzentosh, are they faking the CPU type there as well? I am trying to find the difference between a ryzentosh and my VM, because on a ryzentosh you can run VMWare fusion, on my machine I cannot. I am aware about having to manage nested VMs but if I was passing through the original CPU, as far as OSX is concerned, there shouldn't be much of a difference. At the moment, I can get the installation of a WIndows (or any other OS) VM inside my OSX started , but the installation than fails becasue vmware throws an error. That does not happen with a Ryzentosh. Quote Link to comment
John_M Posted April 3, 2021 Share Posted April 3, 2021 I believe you need a patched kernel to run macOS on bare-metal AMD hardware. Virtualisation gets round that by faking the cores that are expected, which makes it so much easier for people who don't have the experience or the time to experiment. Maybe you could create your own template, without the faking but then you'd need to patch the kernel too. I'm not sure what's to be gained by nesting VMs, when you can easily run multiple VMs alongside each other under a common hypervisor, something that Unraid supports. Quote Link to comment
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