Re: [Qemu-devel] Re: SVM support in 0.12?

[Jun Koi <junkoi2004@gmail.com>]

On Fri, Dec 18, 2009 at 8:35 PM, Alexander Graf <agraf@suse.de> wrote:
>
> Am 18.12.2009 um 03:39 schrieb Jun Koi <junkoi2004@gmail.com>
>
>> On Fri, Dec 18, 2009 at 11:37 AM, Jun Koi <junkoi2004@gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> I am running latest Qemu 0.12-rc. My guest VM runs Linux kernel 2.6.31.
>>>
>>> Because Qemu now supports SVM, I expect to see the SVM flag in
>>> /proc/cpuinfo, but that is not the case.
>>>
>>> So it seems SVM support is not enabled by default configuration??
>>>
>>
>> My host and guest are both 32 bit Linux, if that matters.
>>
>> (And this is pure Qemu, without using KVM or KQemu)
>
> Kqemu actually works with svm emulation.
>
> Have you tried -cpu qemu32,+svm? I think I only enabled svm on qemu64,
> because I'm not aware of 32-bit AMD CPUs that can do svm.
>
> If you use -cpu qemu32 that also means you'll get an emulated Intel CPU.
> KVM-AMD will refuse there.
>
> Also, back when I developed it, 32-bit kvm didn't really work properly. So
> please let me know what you find out!

I tried the latest Qemu code, with the following command:

qemu -m 500 -cpu qemu32,+svm -cdrom ubuntu.iso

I verified that /proc/cpuinfo has no svm flag. So SVM doesnt work on 32bit host.

I will try that with 64bit host to see how it goes.

Thanks,
Jun