eng Li ; Vitaly
> Kuznetsov ; Sean Christopherson
> ; wei.hua...@amd.com
> 主题: Re: [PATCH][v6] KVM: X86: support APERF/MPERF registers
>
> On 05/06/20 19:16, Jim Mattson wrote:
> >>>> @@ -4930,6 +4939,11 @@ int kvm_vm_ioctl_enable_cap(struct kvm
> *kvm,
> &
On 05/06/20 19:16, Jim Mattson wrote:
@@ -4930,6 +4939,11 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
kvm->arch.exception_payload_enabled = cap->args[0];
r = 0;
break;
+case KVM_CAP_APERFMPERF:
+kvm->arch.aperfmperf_mode =
On Thu, Jun 4, 2020 at 11:35 PM Paolo Bonzini wrote:
>
> On 05/06/20 07:00, Xiaoyao Li wrote:
> > you could do
> >
> > bool guest_cpuid_aperfmperf = false;
> > if (best)
> > guest_cpuid_aperfmperf = !!(best->ecx & BIT(0));
> >
> > if (guest_cpuid_aperfmerf !=
On 05/06/20 11:41, Li,Rongqing wrote:
>>
>> As you said, "Pass-though: it is only suitable for KVM_HINTS_REALTIME", which
>> means, KVM needs to make sure the kvm->arch.aperfmperf_mode value could
>> "only" be set to KVM_APERFMPERF_PT when the check
>> kvm_para_has_hint(KVM_HINTS_REALTIME) is
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> wei.hua...@amd.com
> 主题: Re: 答复: [PATCH][v6] KVM: X86: support APERF/MPERF registers
>
> On 2020/6/5 12:23, Li,Rongqing wrote:
> >
On 05/06/20 07:00, Xiaoyao Li wrote:
> you could do
>
> bool guest_cpuid_aperfmperf = false;
> if (best)
> guest_cpuid_aperfmperf = !!(best->ecx & BIT(0));
>
> if (guest_cpuid_aperfmerf != guest_has_aperfmperf(vcpu->kvm))
> return -EINVAL;
>
>
> In fact, I think we
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wei.hua...@amd.com
主题: Re: [PATCH][v6] KVM: X86: support APERF/MPERF registers
Hi RongQing,
On 2020/6/5 9:44, Li RongQing wrote:
Guest kernel reports a fixed cpu frequency
On 6/5/2020 9:44 AM, Li RongQing wrote:
Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
this is confused to user when turbo is enable, and aperf/mperf
can be used to show current cpu frequency after 7d5905dc14a
"(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)"
so
wanpen...@tencent.com; vkuzn...@redhat.com;
> sean.j.christopher...@intel.com; pbonz...@redhat.com; xiaoyao...@intel.com;
> wei.hua...@amd.com
> 主题: Re: [PATCH][v6] KVM: X86: support APERF/MPERF registers
>
> Hi RongQing,
>
> On 2020/6/5 9:44, Li RongQing wrote:
> > Gue
Hi RongQing,
On 2020/6/5 9:44, Li RongQing wrote:
Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
this is confused to user when turbo is enable, and aperf/mperf
can be used to show current cpu frequency after 7d5905dc14a
"(x86 / CPU: Always show current CPU frequency in
Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
this is confused to user when turbo is enable, and aperf/mperf
can be used to show current cpu frequency after 7d5905dc14a
"(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)"
so guest should support aperf/mperf capability
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