Re: [PATCH] KVM: Don't automatically expose the TSC deadline timer in cpuid

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On Mon, Dec 26, 2011 at 12:35, Avi Kivity <avi@xxxxxxxxxx> wrote:
> On 12/26/2011 10:42 AM, Liu, Jinsong wrote:
>> >  }
>> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>> > index df23dff..1171def 100644
>> > --- a/arch/x86/kvm/x86.c
>> > +++ b/arch/x86/kvm/x86.c
>> > @@ -2089,6 +2089,9 @@ int kvm_dev_ioctl_check_extension(long ext)
>> >     case KVM_CAP_TSC_CONTROL:
>> >             r = kvm_has_tsc_control;
>> >             break;
>> > +   case KVM_CAP_TSC_DEADLINE_TIMER:
>> > +           r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER);
>> > +           break;
>>
>> kvm tsc deadline timer is pure software emulated, not depend on host physically.
>
> Yeah, I want to reconsider it in the 3.3 cycle.  I'm not so hot on
> exposing non hardware features anymore, at least we want better
> reporting to userspace.
>

Just as a reminder, could you please revert the problematic commit
(a3e06bbe) for 3.2?
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