linux-kernel - Re: [PATCH v2 7/7] KVM: X86: Move kvm_apic_set_version() to kvm_update_vcpu

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Date:   Fri, 3 Jul 2020 06:30:27 +0800
From:   Xiaoyao Li <xiaoyao.li@...el.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 7/7] KVM: X86: Move kvm_apic_set_version() to
 kvm_update_vcpu_model()

On 7/3/2020 3:00 AM, Sean Christopherson wrote:
> On Tue, Jun 23, 2020 at 07:58:16PM +0800, Xiaoyao Li wrote:
>> Obviously, kvm_apic_set_version() fits well in kvm_update_vcpu_model().
> 
> Same as the last patch, it would be nice to explicitly document that there
> are no dependencies between kvm_apic_set_version() and kvm_update_cpuid().

Sure, will do.

Thanks!

>> Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
>> ---
>>   arch/x86/kvm/cpuid.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
>> index 5decc2dd5448..3428f4d84b42 100644
>> --- a/arch/x86/kvm/cpuid.c
>> +++ b/arch/x86/kvm/cpuid.c
>> @@ -129,6 +129,8 @@ void kvm_update_vcpu_model(struct kvm_vcpu *vcpu)
>>   			apic->lapic_timer.timer_mode_mask = 3 << 17;
>>   		else
>>   			apic->lapic_timer.timer_mode_mask = 1 << 17;
>> +
>> +		kvm_apic_set_version(vcpu);
>>   	}
>>   
>>   	best = kvm_find_cpuid_entry(vcpu, 0xD, 0);
>> @@ -226,7 +228,6 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
>>   	}
>>   
>>   	cpuid_fix_nx_cap(vcpu);
>> -	kvm_apic_set_version(vcpu);
>>   	kvm_update_cpuid(vcpu);
>>   	kvm_update_vcpu_model(vcpu);
>>   
>> @@ -255,7 +256,6 @@ int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
>>   		goto out;
>>   	}
>>   
>> -	kvm_apic_set_version(vcpu);
>>   	kvm_update_cpuid(vcpu);
>>   	kvm_update_vcpu_model(vcpu);
>>   out:
>> -- 
>> 2.18.2
>>