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Re: How to create and start Xen guest VM by qemu-system-x86_64 command line
Hi Alex,
Thanks for the response.
Actually my target is trying to enable virglrenderer on Xen based Qemu. Before, I have successfully enabled it on KVM based Qemu by the Qemu command line. Such as 'qemu-system-x86_64 -device virtio-vga-gl xxxxxxx' If change to use xl, I don't know how to set this kind of special option(-device virtio-vga-gl
) to qemu after I checked the xl's arguments. Or do you have any idea? :)
Seems using XL is much more common than
directly
using the qemu command line , right?
Thanks, Trigger
Trigger Huang <trigger.huang@xxxxxxxxx> writes:
> Hello,
>
> I have built & installed Xen 4.15 onto my Ubuntu20.04 platform successfully according to
> https://wiki.xenproject.org/wiki/Compiling_Xen_From_Source
> After reboot, I entered Domain 0 successfully. The command xl info shows the right version string.
> host : xvg
> release : 5.13.0-30-generic
> version : #33~20.04.1-Ubuntu SMP Mon Feb 7 14:25:10 UTC 2022
> machine : x86_64
> nr_cpus : 16
> max_cpu_id : 31
> nr_nodes : 1
> cores_per_socket : 8
> threads_per_core : 2
> cpu_mhz : 2994.377
> hw_caps : 178bf3ff:76d8320b:2e500800:244037ff:0000000f:219c91a9:00400004:00000500
> virt_caps : pv hvm hvm_directio pv_directio hap shadow
> total_memory : 15719
> free_memory : 11425
> sharing_freed_memory : 0
> sharing_used_memory : 0
> outstanding_claims : 0
> free_cpus : 0
> xen_major : 4
> xen_minor : 15
> xen_extra : .3-pre-atg08
> xen_version : 4.15.3-pre-atg08
> xen_caps : xen-3.0-x86_64 hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
> xen_scheduler : credit2
> xen_pagesize : 4096
> platform_params : virt_start=0xffff800000000000
> xen_changeset : Fri Mar 4 13:33:49 2022 +0800 git:6aa4cdbc31
> xen_commandline : placeholder dom0_mem=4096M,max:8192M no-real-mode edd=off
> cc_compiler : gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
> cc_compile_by : xvg
> cc_compile_domain :
> cc_compile_date : Fri Mar 4 14:21:33 CST 2022
> build_id : 234929adcb7588b1414c2b6e5477fa95052b4ded
> xend_config_format : 4
>
> Then my next step is to create ubuntu guest VM(sudo or use root user):
> /usr/local/lib/xen/bin/qemu-system-x86_64 -smp 1 -xen-domid 4 -machine xenfv -m 4G -net nic,model=virtio -net
> user,hostfwd=tcp::2222-:22 -hda ./u2004.qcow2 -boot d -cdrom ./ubuntu-20.04-desktop-amd64.iso
> However, I always failed with the following error:
> qemu-system-x86_64: failed to map ioreq server resources: error 3 handle=0x55eeb1f6c0b0
> qemu-system-x86_64: xen hardware virtual machine initialisation failed
> After debugging, the error is caused by osdep_xenforeignmemory_map_resource failed to invoke IOCTL_PRIVCMD_MMAP_RESOURCE. And
> this IOCTL will return -1.
Why are you not launching your guests with the xl commands?
>
> So my question is, am I using the right qemu command? Anything else is needed to set/config?
> Note, if I didn't specify the option ' -xen-domid 4 -machine xenfv ', I can start qemu successfully
>
> Would you please help with it?
--
Alex Bennée
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