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Re: [Qemu-devel] -cpu check, rdtscp and AMD KVM
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] -cpu check, rdtscp and AMD KVM |
Date: |
Thu, 12 Nov 2015 16:58:37 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 12/11/2015 16:25, Eduardo Habkost wrote:
> On Thu, Nov 12, 2015 at 11:53:44AM +0100, Paolo Bonzini wrote:
>> Eduardo,
>>
>> running QEMU 2.5 on SVM causes a warning because rdtscp is not supported
>> by KVM. While I can fix it, that leaves a warning on all existing kernels.
>
> You mean when using Opteron_G2 or newer, right? qemu64 and kvm64
> don't have rdtscp enabled.
>
>> What do you think is the best way forward?
>
> To simply remove rdtscp from all Opteron_G* models?
Not sure this is the right thing to do... Real hardware has it, and
going forward KVM will provide it.
Paolo