linux-kernel - Re: [PATCH V4 3/4] KVM: x86: Add a capability to configure bus frequency for APIC timer

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Message-ID: <1e26b405-f382-45f4-9dd5-3ea5db68302a@intel.com>
Date: Wed, 17 Apr 2024 11:37:37 +0800
From: Xiaoyao Li <xiaoyao.li@...el.com>
To: Reinette Chatre <reinette.chatre@...el.com>, isaku.yamahata@...el.com,
 pbonzini@...hat.com, erdemaktas@...gle.com, vkuznets@...hat.com,
 seanjc@...gle.com, vannapurve@...gle.com, jmattson@...gle.com,
 mlevitsk@...hat.com, chao.gao@...el.com, rick.p.edgecombe@...el.com
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 3/4] KVM: x86: Add a capability to configure bus
 frequency for APIC timer

On 3/22/2024 12:37 AM, Reinette Chatre wrote:

..

> diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
> index 0b5a33ee71ee..20080fe4b8ee 100644
> --- a/Documentation/virt/kvm/api.rst
> +++ b/Documentation/virt/kvm/api.rst
> @@ -8063,6 +8063,23 @@ error/annotated fault.
>   
>   See KVM_EXIT_MEMORY_FAULT for more information.
>   
> +7.35 KVM_CAP_X86_APIC_BUS_FREQUENCY

As sean mentioned it previous comment, I would be the one prefers 
KVM_CAP_X86_APIC_BUS_CYCLES_NS

   Depending on whether people get hung up on nanoseconds not being a
   "frequency", either KVM_CAP_X86_APIC_BUS_FREQUENCY or
   KVM_CAP_X86_APIC_BUS_CYCLES_NS.