Hi, I have this setup kernel: x86_64 version 4.2.0 operating system (rootfs binutils etc.,) : i386 (ELF-32-bit) qemu-system : version 2.4.0 qemu-system-x86_64 (i386 binary) libvirt: 1.2.19 (i386 ) When I run the qemu-system-x86_64 binary with --enable-kvm, the guest machine is working properly as hvm. So QEMU can run x86_64 OS as hvm when I install using virt-install virt-install --name debian --cdrom ./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata --ram 1024 --graphics vnc I expect the 64-bit kernel to load and start install in the guest but i get a complaint that the guest cannot boot since the cpu is not 64-bit capable (please use a kernel appropriate for your CPU) I tried adding the machine option to virt-install virt-install --name debian --cdrom ./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata --ram 1024 --graphics vnc --machine pc-i440fx-2.0 No joy Tried changing the machine as hvm and also added --arch x86_64 none of them help ! Can someone tell me how to do this ? Just because the binutils and the OS is 32-bit I think libvirt must not refuse to hvm a x86_64 guest since the kernel is still x86_64 kernel and so so the kvm (module) I am guessing I am missing some option passed to virt-install or this is a limitation purely on libvirt (not qemu or kvm) Moreover QEMU is able to run a hvm guest x86_64 and manually running qemu does bootup the 64-bit kernel guests.
Using virt-manager and copying host CPU can still boot the guest OS (64-bit) virt-install however still is not doing the job. On 9/6/15, Bhasker C V <bhasker@unixindia.com> wrote:> Hi, > > I have this setup > > > kernel: x86_64 version 4.2.0 > operating system (rootfs binutils etc.,) : i386 (ELF-32-bit) > qemu-system : version 2.4.0 qemu-system-x86_64 (i386 binary) > libvirt: 1.2.19 (i386 ) > > When I run the qemu-system-x86_64 binary with --enable-kvm, the guest > machine is working properly as hvm. So > QEMU can run x86_64 OS as hvm > > when I install using virt-install > virt-install --name debian --cdrom > ./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata > --ram 1024 --graphics vnc > > I expect the 64-bit kernel to load and start install in the guest but > i get a complaint that the guest cannot boot since the cpu is not > 64-bit capable (please use a kernel appropriate for your CPU) > > I tried adding the machine option to virt-install > virt-install --name debian --cdrom > ./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata > --ram 1024 --graphics vnc --machine pc-i440fx-2.0 > > No joy > > Tried changing the machine as hvm and also added --arch x86_64 > none of them help ! > > Can someone tell me how to do this ? > Just because the binutils and the OS is 32-bit I think libvirt must > not refuse to hvm a x86_64 guest since the kernel is still x86_64 > kernel and so so the kvm (module) > > I am guessing I am missing some option passed to virt-install or this > is a limitation purely on libvirt (not qemu or kvm) > > Moreover QEMU is able to run a hvm guest x86_64 and manually running > qemu does bootup the 64-bit kernel guests. >
Martin Kletzander
2015-Sep-07 06:52 UTC
Re: [libvirt-users] hvm on x86_64 on binutils i386
On Sun, Sep 06, 2015 at 01:47:47PM +0100, Bhasker C V wrote:>Hi, > > I have this setup > > >kernel: x86_64 version 4.2.0 >operating system (rootfs binutils etc.,) : i386 (ELF-32-bit) >qemu-system : version 2.4.0 qemu-system-x86_64 (i386 binary) >libvirt: 1.2.19 (i386 ) > >When I run the qemu-system-x86_64 binary with --enable-kvm, the guest >machine is working properly as hvm. So >QEMU can run x86_64 OS as hvm > >when I install using virt-install >virt-install --name debian --cdrom >./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata >--ram 1024 --graphics vnc > >I expect the 64-bit kernel to load and start install in the guest but >i get a complaint that the guest cannot boot since the cpu is not >64-bit capable (please use a kernel appropriate for your CPU) > >I tried adding the machine option to virt-install >virt-install --name debian --cdrom >./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata >--ram 1024 --graphics vnc --machine pc-i440fx-2.0 > >No joy > >Tried changing the machine as hvm and also added --arch x86_64 >none of them help ! > >Can someone tell me how to do this ? >Just because the binutils and the OS is 32-bit I think libvirt must >not refuse to hvm a x86_64 guest since the kernel is still x86_64 >kernel and so so the kvm (module) > >I am guessing I am missing some option passed to virt-install or this >is a limitation purely on libvirt (not qemu or kvm) > >Moreover QEMU is able to run a hvm guest x86_64 and manually running >qemu does bootup the 64-bit kernel guests. >If the qemu you have installed is able to do that, and virt-manager as well, then the best thing you can do is start comparing the XMLs (or command lines) from virt-install and virt-manager. I would try adding '--arch x86_64 --cpu host-model-only --virt-type kvm', but the XML differentiation is your best bet. To see why the difference is there, you might ask on virt-tools-list for detailed answers.>_______________________________________________ >libvirt-users mailing list >libvirt-users@redhat.com >https://www.redhat.com/mailman/listinfo/libvirt-users
Adding switch --cpu mode=host-model along with --arch x86_64 fixes this issue. However I am not able to boot with "any other" CPU type like I used to be able to give --cpu core2duo and things would work ! On 9/6/15, Bhasker C V <bhasker@unixindia.com> wrote:> Using virt-manager and copying host CPU can still boot the guest OS > (64-bit) > virt-install however still is not doing the job. > > On 9/6/15, Bhasker C V <bhasker@unixindia.com> wrote: >> Hi, >> >> I have this setup >> >> >> kernel: x86_64 version 4.2.0 >> operating system (rootfs binutils etc.,) : i386 (ELF-32-bit) >> qemu-system : version 2.4.0 qemu-system-x86_64 (i386 binary) >> libvirt: 1.2.19 (i386 ) >> >> When I run the qemu-system-x86_64 binary with --enable-kvm, the guest >> machine is working properly as hvm. So >> QEMU can run x86_64 OS as hvm >> >> when I install using virt-install >> virt-install --name debian --cdrom >> ./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata >> --ram 1024 --graphics vnc >> >> I expect the 64-bit kernel to load and start install in the guest but >> i get a complaint that the guest cannot boot since the cpu is not >> 64-bit capable (please use a kernel appropriate for your CPU) >> >> I tried adding the machine option to virt-install >> virt-install --name debian --cdrom >> ./debian-stretch-DI-a1-amd64-netinst.iso --disk /STOR/DEBIAN,bus=sata >> --ram 1024 --graphics vnc --machine pc-i440fx-2.0 >> >> No joy >> >> Tried changing the machine as hvm and also added --arch x86_64 >> none of them help ! >> >> Can someone tell me how to do this ? >> Just because the binutils and the OS is 32-bit I think libvirt must >> not refuse to hvm a x86_64 guest since the kernel is still x86_64 >> kernel and so so the kvm (module) >> >> I am guessing I am missing some option passed to virt-install or this >> is a limitation purely on libvirt (not qemu or kvm) >> >> Moreover QEMU is able to run a hvm guest x86_64 and manually running >> qemu does bootup the 64-bit kernel guests. >> >