[libvirt-users] hvm on x86_64 on binutils i386

[Bhasker C V]

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 at 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 at 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.
>>
>