Re: [Qemu-devel] [PATCH v2 1/1] target-i386: Fix default Hypervisor level for hypervisor-vendor=kvm.

[Don Slutz <Don@CloudSwitch.Com>]

On 09/21/12 10:18, Eduardo Habkost wrote:
> On Thu, Sep 20, 2012 at 04:06:27PM -0400, Don Slutz wrote:
>>  From http://lkml.indiana.edu/hypermail/linux/kernel/1205.0/00100.html
>> EAX should be KVM_CPUID_FEATURES (0x40000001) not 0.
>>
>> Added hypervisor-vendor=kvm0 to get the older CPUID result. kvm1 selects the newer one.
> Why not just make "hypervisor-vendor=kvm" control only the hypervisor
> vendor string, and support something like "kvm-hypervisor-level=0" to
> restore the old cpuid_hv_level=0 behavior?
   -cpu host,hypervisor-vendor=kvm,hypervisor-level=0

  Does this.
>
> This is similar to the kvmclock case: it would allow us to make
> "hypervisor-vendor=kvm" use saner values as default, but letting old
> machine-types to override it for compatibility if required.
Right now since I am using env->cpuid_hv_level == 0 as a flag. This 
means that:

   -cpu host,hypervisor-level=0,hypervisor-vendor=kvm

   -cpu host,hypervisor-vendor=kvm,hypervisor-level=0

end up with different CPUID data (Which I do not like). I will fix this in the next round.

Did you want me to drop kvm0 and kvm1?
    -Don

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