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Error: --boot uefi=RPI_EFI.fd : Did not find any UEFI binary path for arch 'aarch64' emulating raspi3 on jetson nano with virt-install
by Mario Marietto 03 Jun '21

03 Jun '21

Hello. it's more of a challenge,to be able to emulate the raspberry pi 3 on my Jetson nano (aarch64) using virt-install. I'm learning how to do that by reading heavily here : https://github.com/dhruvvyas90/qemu-rpi-kernel I tried to do something like this : virt-install \ --name pi \ --machine raspi3 \ --cpu arm1176 \ --memory 1024 \ --import \ --disk /root/Desktop/zi/Work/Android/Raspy/Debian/2019-09-26-raspbian-buster-lite.img,format=raw,bus=virtio \ --network user,model=virtio \ --video vga \ --graphics spice \ --rng device=/dev/urandom,model=virtio \ --boot 'uefi=RPI_EFI.fd,dtb=bcm2710-rpi-3-b-plus.dtb,kernel=kernel8.img,kernel_args=root=/dev/vda2 rootwait panic=1 dwc_otg.fiq_fsm_enable=0' \ --events on_reboot=destroy But I get this error : ERROR Error: --boot uefi=RPI_EFI.fd,dtb=bcm2710-rpi-3-b-plus.dtb,kernel= kernel8.img,kernel_args=root=/dev/vda2 rootwait panic=1 dwc_otg.fiq_fsm_enable=0: Did not find any UEFI binary path for arch 'aarch64' I've got the UEFI BIOS file from here : https://github.com/andreiw/RaspberryPiPkg/blob/master/Binary/prebuilt/2019J… I'm not sure if it isn't the right efi file to use in this specific configuration or if it is,but I'm passing the parameter badly. What do you suggest me to do ? -- Mario.

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virt viewer for Mac
by Francesc Guasch 03 Jun '21

03 Jun '21

Hi. Please excuse me if this is not the right place to ask. We are using virt viewer happily from Linux, and though the Windows release sometimes has issues it seems it is maintained. There is this Mac client here: https://people.freedesktop.org/~teuf/spice-gtk-osx/ We have been reported it is outdated and somehow buggy. Is there another alternative ? Are there plans to port virt-viewer for Macs ? Thank you.

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how to increase vram in windows guest?
by gansteed 27 May '21

27 May '21

Hello: I'm using kvm to host a windows 7 guest vm, I've install the latest spice guest tools from https://spice-space.org/download/windows/spice-guest-tools/spice-guest-tool…, and I've set video section like this: <video> <model type="qxl" ram="262144" vram="262144" vram64="262144" vgamem="131072" heads="1" primary="yes"/> <alias name="video0"/> <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0"/> </video> but the graphics in windows guest is laggy, I' found that the guest have only use 16MB as vram: How can I increase the real usage of vram in the windows guest vm?

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Console of P2V?
by Ken D'Ambrosio 24 May '21

24 May '21

Hey, all. For one, apologies if this isn't quite the right list, I tried to get the right one. But, my problem: I'm firing up a Centos 6.5 box with virt-install, recently converted from a physical (I did a 'dd' to a raw image, and converted it to qcow2), and it boots fine, etc., etc., but I can't get to the console except through vnc; "virsh console" just shows a blank screen. Do I need to tell the kernel to boot in ASCII mode or somesuch? Thanks! -Ken

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virHostdevIsPCINodeDeviceUsed
by Simon Fairweather 19 May '21

19 May '21

I am looking to be able to check if a specific PCI device is allocated to a guest. An error is produced if a domain is started and the device is in use within another domain via this function. I cannot see a publicly available function to use to get this information, is there one available or is there another way to check the state of the PCI device. Regards Simon

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How to hot plugin a new vhost-user-blk-pci device to running VM?
by 梁朝军 14 May '21

14 May '21

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How to hot plugin a new vhost-user-blk-pci device to running VM?
by Liang Chaojun 13 May '21

13 May '21

Hi Guy, Does anyone clear how to hot plugin a new vhost-user-blk-pci device to a running VM? Before staring vm , I pass the disk through QEMU command line like below. <qemu:commandline> <qemu:arg value='-object'/> <qemu:arg value='memory-backend-file,id=mem0,size=4G,mem-path=/dev/hugepages,share=on'/> <qemu:arg value='-numa'/> <qemu:arg value='node,memdev=mem0'/> <qemu:arg value='-chardev'/> <qemu:arg value='socket,id=spdk_vhost_blk721ea46a-b306-11eb-a280-525400a98761,path=/var/tmp/vhost.721ea46a-b306-11eb-a280-525400a98761,reconnect=1'/> <qemu:arg value='-device'/> <qemu:arg value='vhost-user-blk-pci,chardev=spdk_vhost_blk721ea46a-b306-11eb-a280-525400a98761,bootindex=1,num-queues=4'/> <qemu:arg value='-chardev'/> <qemu:arg value='socket,id=spdk_vhost_blk2f699c58-d222-4629-9fdc-400c3aadc55e,path=/var/tmp/vhost.2f699c58-d222-4629-9fdc-400c3aadc55e,reconnect=1'/> <qemu:arg value='-device'/> <qemu:arg value='vhost-user-blk-pci,chardev=spdk_vhost_blk2f699c58-d222-4629-9fdc-400c3aadc55e,num-queues=4'/> </qemu:commandline> But I don’t know how to live add a vhost-user-blk-pci device on running VM even with calling attachDevice API now. OS: redhat 7.4 Libvirt version: 3.4 Your help will be appreciated. Thanks!

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boot arm64 guest stuck
by Jiatong Shen 11 May '21

11 May '21

hello community, I am stuck at a problem where a virtual machine stuck at "guest has not initialized the display" on a arm64 (FT2000+) server and the relevant qemu process will continue to have a cpu usage of 100%. I do try with different qemu and qemu-efi combined and found out that if I use qemu build qemu-system-arm/now 1:2.11+dfsg-1ubuntu7.15~cloud1 arm64 with qemu-efi/now 0~20160408.ffea0a2c-2 all and set gic-version to 2, the vm could boot. the virtual machine uses a kylink 4.0 image. I am scrubbing my head to debug the bug and find out the reason... any idea or advice will be appreciated. thank you very much for the help -- Best Regards, Jiatong Shen

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trying to understand how libvirt uses firewalld
by Felix Schwarz 30 Apr '21

30 Apr '21

Hi, I recently installed a test box using CentOS 8 and installed a CentOS 8 guest via libvirt (KVM). I need to use "routed" forwarding as the datacenter only gives me individual IPs which are routed to the physical interface and the switch only accepts packets with a well-known MAC address. On the host I enabled firewalld and moved the guest to a specific firewalld zone. I verified that libvirt is detecting firewalld. My idea was that I could use this to create somewhat fine-grained filters on the host for traffic from the internet to the guest (and possibly vice-versa). However it seems like that does not work the way I wanted: It seems as if nothing changes when I allow/disallow SSH for that zone. I can still ssh from the internet to the guest. After several reads on the documentation I have a guess of what might be going on but I'd like to confirm that: https://libvirt.org/firewall.html#fw-firewalld-and-virtual-network-driver > If firewalld is active on the host, libvirt will attempt to place the bridge > interface of a libvirt virtual network into the firewalld zone named > "libvirt" (thus making all guest->host traffic on that network subject to > the rules of the "libvirt" zone). Does that mean libvirt's firewalld usage is ONLY for traffic guest->host and does not affect all other traffic (e.g. host->guest, guest<->internet)? That sounds incredibly narrow (and not very useful for me) but it would explain why I don't see any effects in my experiment... --- In a related note it would be nice if there was a way to make routed setups with individual IPs easier. This problem hunts me for more than 10 years (I think I posted something in 2009 - still the same problem basically) and it would be nice if libvirt could somehow support this use case better: I want to allow traffic guest <-> internet in a routed setup. libvirt generates iptables rules like these: Chain LIBVIRT_FWO (1 references) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- br-private * 10.11.0.0/24 0.0.0.0/0 0 0 REJECT all -- br-private * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable 0 0 ACCEPT all -- br-public * (NETWORK IP ) 0.0.0.0/0 43 3232 REJECT all -- br-public * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable I my case "NETWORK IP" is a /32 IPv4 and AFAIK I have to put the host's IPv4 here (which is basically the router) so I can assign the guest IP inside the VM. What I need is basically a rule like ACCEPT one above but with the GUEST IP. I have some elaborate Python script which I can use as a "network" hook but that requires parsing output of "iptables" due to libvirt's events (e.g. libvirtd restart triggers one "plugged" event per VM). Thank you very much, Felix

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l3 cache and cpu pinning
by Roman Mohr 23 Apr '21

23 Apr '21

Hi, I have a question regarding enabling l3 cache emulation on Domains. Can this also be enabled without cpu-pinning, or does it need cpu pinning to emulate the l3 caches according to the cpus where the guest is pinned to? Thank you and best regards, Roman

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